Messages in this thread Patch in this message | | | From | monstr@monstr ... | Subject | [PATCH 04/52] [microblaze] Open firmware files | Date | Thu, 24 Jan 2008 16:03:29 +0100 |
| |
From: Michal Simek <monstr@monstr.eu>
Signed-off-by: Michal Simek <monstr@monstr.eu> --- arch/microblaze/kernel/of_device.c | 109 +++ arch/microblaze/kernel/of_platform.c | 395 +++++++++++ arch/microblaze/kernel/prom.c | 1248 ++++++++++++++++++++++++++++++++++ arch/microblaze/kernel/prom_parse.c | 1033 ++++++++++++++++++++++++++++ include/asm-microblaze/of_device.h | 37 + include/asm-microblaze/of_platform.h | 37 + include/asm-microblaze/prom.h | 333 +++++++++ 7 files changed, 3192 insertions(+), 0 deletions(-) create mode 100644 arch/microblaze/kernel/of_device.c create mode 100644 arch/microblaze/kernel/of_platform.c create mode 100644 arch/microblaze/kernel/prom.c create mode 100644 arch/microblaze/kernel/prom_parse.c create mode 100644 include/asm-microblaze/of_device.h create mode 100644 include/asm-microblaze/of_platform.h create mode 100644 include/asm-microblaze/prom.h
diff --git a/arch/microblaze/kernel/of_device.c b/arch/microblaze/kernel/of_device.c new file mode 100644 index 0000000..7697b98 --- /dev/null +++ b/arch/microblaze/kernel/of_device.c @@ -0,0 +1,109 @@ +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/slab.h> + +#include <asm/errno.h> +#include <asm/of_device.h> + +ssize_t of_device_get_modalias(struct of_device *ofdev, + char *str, ssize_t len) +{ + const char *compat; + int cplen, i; + ssize_t tsize, csize, repend; + + /* Name & Type */ + csize = snprintf(str, len, "of:N%sT%s", + ofdev->node->name, ofdev->node->type); + + /* Get compatible property if any */ + compat = of_get_property(ofdev->node, "compatible", &cplen); + if (!compat) + return csize; + + /* Find true end (we tolerate multiple \0 at the end */ + for (i = (cplen-1); i >= 0 && !compat[i]; i--) + cplen--; + if (!cplen) + return csize; + cplen++; + + /* Check space (need cplen+1 chars including final \0) */ + tsize = csize + cplen; + repend = tsize; + + /* @ the limit, all is already filled */ + if (csize >= len) + return tsize; + + /* limit compat list */ + if (tsize >= len) { + cplen = len - csize - 1; + repend = len; + } + + /* Copy and do char replacement */ + memcpy(&str[csize+1], compat, cplen); + for (i = csize; i < repend; i++) { + char c = str[i]; + if (c == '\0') + str[i] = 'C'; + else if (c == ' ') + str[i] = '_'; + } + + return tsize; +} +EXPORT_SYMBOL(of_device_get_modalias); + +int of_device_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct of_device *ofdev; + const char *compat; + int seen = 0, cplen, sl; + + if (!dev) + return -ENODEV; + + ofdev = to_of_device(dev); + + if (add_uevent_var(env, "OF_NAME=%s", ofdev->node->name)) + return -ENOMEM; + + if (add_uevent_var(env, "OF_TYPE=%s", ofdev->node->type)) + return -ENOMEM; + + /* Since the compatible field can contain pretty much anything + * it's not really legal to split it out with commas. We split it + * up using a number of environment variables instead. */ + + compat = of_get_property(ofdev->node, "compatible", &cplen); + while (compat && *compat && cplen > 0) { + if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat)) + return -ENOMEM; + + sl = strlen(compat) + 1; + compat += sl; + cplen -= sl; + seen++; + } + + if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen)) + return -ENOMEM; + + /* modalias is trickier, we add it in 2 steps */ + if (add_uevent_var(env, "MODALIAS=")) + return -ENOMEM; + sl = of_device_get_modalias(ofdev, &env->buf[env->buflen-1], + sizeof(env->buf) - env->buflen); + if (sl >= (sizeof(env->buf) - env->buflen)) + return -ENOMEM; + env->buflen += sl; + + return 0; +} +EXPORT_SYMBOL(of_device_uevent); diff --git a/arch/microblaze/kernel/of_platform.c b/arch/microblaze/kernel/of_platform.c new file mode 100644 index 0000000..7bdd807 --- /dev/null +++ b/arch/microblaze/kernel/of_platform.c @@ -0,0 +1,395 @@ +/* + * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. + * <benh@kernel.crashing.org> + * and Arnd Bergmann, IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#undef DEBUG + +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/slab.h> +#include <linux/pci.h> + +#include <asm/errno.h> +#include <asm/of_device.h> +#include <asm/of_platform.h> +#include <asm/topology.h> +#include <asm/pci-bridge.h> +#include <asm/atomic.h> + +/* + * The list of OF IDs below is used for matching bus types in the + * system whose devices are to be exposed as of_platform_devices. + * + * This is the default list valid for most platforms. This file provides + * functions who can take an explicit list if necessary though + * + * The search is always performed recursively looking for children of + * the provided device_node and recursively if such a children matches + * a bus type in the list + */ + +static struct of_device_id of_default_bus_ids[] = { + { .type = "soc", }, + { .compatible = "soc", }, + { .type = "spider", }, + { .type = "axon", }, + { .type = "plb5", }, + { .type = "plb4", }, + { .type = "opb", }, + { .type = "ebc", }, + {}, +}; + +static atomic_t bus_no_reg_magic; + +struct bus_type of_platform_bus_type = { + .uevent = of_device_uevent, +}; +EXPORT_SYMBOL(of_platform_bus_type); + +static int __init of_bus_driver_init(void) +{ + return of_bus_type_init(&of_platform_bus_type, "of_platform"); +} + +postcore_initcall(of_bus_driver_init); + +int of_register_platform_driver(struct of_platform_driver *drv) +{ + /* initialize common driver fields */ + drv->driver.name = drv->name; + drv->driver.bus = &of_platform_bus_type; + + /* register with core */ + return driver_register(&drv->driver); +} +EXPORT_SYMBOL(of_register_platform_driver); + +void of_unregister_platform_driver(struct of_platform_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL(of_unregister_platform_driver); + +static void of_platform_make_bus_id(struct of_device *dev) +{ + struct device_node *node = dev->node; + char *name = dev->dev.bus_id; + const u32 *reg; + u64 addr; + int magic; + + /* + * If it's a DCR based device, use 'd' for native DCRs + * and 'D' for MMIO DCRs. + */ +#ifdef CONFIG_PPC_DCR + reg = of_get_property(node, "dcr-reg", NULL); + if (reg) { +#ifdef CONFIG_PPC_DCR_NATIVE + snprintf(name, BUS_ID_SIZE, "d%x.%s", + *reg, node->name); +#else /* CONFIG_PPC_DCR_NATIVE */ + addr = of_translate_dcr_address(node, *reg, NULL); + if (addr != OF_BAD_ADDR) { + snprintf(name, BUS_ID_SIZE, + "D%llx.%s", (unsigned long long)addr, + node->name); + return; + } +#endif /* !CONFIG_PPC_DCR_NATIVE */ + } +#endif /* CONFIG_PPC_DCR */ + + /* + * For MMIO, get the physical address + */ + reg = of_get_property(node, "reg", NULL); + if (reg) { + addr = of_translate_address(node, reg); + if (addr != OF_BAD_ADDR) { + snprintf(name, BUS_ID_SIZE, + "%llx.%s", (unsigned long long)addr, + node->name); + return; + } + } + + /* + * No BusID, use the node name and add a globally incremented + * counter (and pray...) + */ + magic = atomic_add_return(1, &bus_no_reg_magic); + snprintf(name, BUS_ID_SIZE, "%s.%d", node->name, magic - 1); +} + +struct of_device *of_platform_device_create(struct device_node *np, + const char *bus_id, + struct device *parent) +{ + struct of_device *dev; + + dev = kmalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return NULL; + + dev->node = of_node_get(np); + dev->dma_mask = 0xffffffffUL; + dev->dev.dma_mask = &dev->dma_mask; + dev->dev.parent = parent; + dev->dev.bus = &of_platform_bus_type; + dev->dev.release = of_release_dev; + dev->dev.archdata.of_node = np; + dev->dev.archdata.numa_node = of_node_to_nid(np); + + /* We do not fill the DMA ops for platform devices by default. + * This is currently the responsibility of the platform code + * to do such, possibly using a device notifier + */ + + if (bus_id) + strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE); + else + of_platform_make_bus_id(dev); + + if (of_device_register(dev) != 0) { + kfree(dev); + return NULL; + } + + return dev; +} +EXPORT_SYMBOL(of_platform_device_create); + +/** + * of_platform_bus_create - Create an OF device for a bus node and all its + * children. Optionally recursively instanciate matching busses. + * @bus: device node of the bus to instanciate + * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to + * disallow recursive creation of child busses + */ +static int of_platform_bus_create(struct device_node *bus, + struct of_device_id *matches, + struct device *parent) +{ + struct device_node *child; + struct of_device *dev; + int rc = 0; + + for (child = NULL; (child = of_get_next_child(bus, child)); ) { + pr_debug(" create child: %s\n", child->full_name); + dev = of_platform_device_create(child, NULL, parent); + if (dev == NULL) + rc = -ENOMEM; + else if (!of_match_node(matches, child)) + continue; + if (rc == 0) { + pr_debug(" and sub busses\n"); + rc = of_platform_bus_create(child, matches, &dev->dev); + } if (rc) { + of_node_put(child); + break; + } + } + return rc; +} + +/** + * of_platform_bus_probe - Probe the device-tree for platform busses + * @root: parent of the first level to probe or NULL for the root of the tree + * @matches: match table, NULL to use the default + * @parent: parent to hook devices from, NULL for toplevel + * + * Note that children of the provided root are not instanciated as devices + * unless the specified root itself matches the bus list and is not NULL. + */ + +int of_platform_bus_probe(struct device_node *root, + struct of_device_id *matches, + struct device *parent) +{ + struct device_node *child; + struct of_device *dev; + int rc = 0; + + if (matches == NULL) + matches = of_default_bus_ids; + if (matches == OF_NO_DEEP_PROBE) + return -EINVAL; + if (root == NULL) + root = of_find_node_by_path("/"); + else + of_node_get(root); + + pr_debug("of_platform_bus_probe()\n"); + pr_debug(" starting at: %s\n", root->full_name); + + /* Do a self check of bus type, if there's a match, create + * children + */ + if (of_match_node(matches, root)) { + pr_debug(" root match, create all sub devices\n"); + dev = of_platform_device_create(root, NULL, parent); + if (dev == NULL) { + rc = -ENOMEM; + goto bail; + } + pr_debug(" create all sub busses\n"); + rc = of_platform_bus_create(root, matches, &dev->dev); + goto bail; + } + for (child = NULL; (child = of_get_next_child(root, child)); ) { + if (!of_match_node(matches, child)) + continue; + + pr_debug(" match: %s\n", child->full_name); + dev = of_platform_device_create(child, NULL, parent); + if (dev == NULL) + rc = -ENOMEM; + else + rc = of_platform_bus_create(child, matches, &dev->dev); + if (rc) { + of_node_put(child); + break; + } + } + bail: + of_node_put(root); + return rc; +} +EXPORT_SYMBOL(of_platform_bus_probe); + +static int of_dev_node_match(struct device *dev, void *data) +{ + return to_of_device(dev)->node == data; +} + +struct of_device *of_find_device_by_node(struct device_node *np) +{ + struct device *dev; + + dev = bus_find_device(&of_platform_bus_type, + NULL, np, of_dev_node_match); + if (dev) + return to_of_device(dev); + return NULL; +} +EXPORT_SYMBOL(of_find_device_by_node); + +static int of_dev_phandle_match(struct device *dev, void *data) +{ + phandle *ph = data; + return to_of_device(dev)->node->linux_phandle == *ph; +} + +struct of_device *of_find_device_by_phandle(phandle ph) +{ + struct device *dev; + + dev = bus_find_device(&of_platform_bus_type, + NULL, &ph, of_dev_phandle_match); + if (dev) + return to_of_device(dev); + return NULL; +} +EXPORT_SYMBOL(of_find_device_by_phandle); + +#ifdef CONFIG_PPC_OF_PLATFORM_PCI + +/* The probing of PCI controllers from of_platform is currently + * 64 bits only, mostly due to gratuitous differences between + * the 32 and 64 bits PCI code on PowerPC and the 32 bits one + * lacking some bits needed here. + */ + +static int __devinit of_pci_phb_probe(struct of_device *dev, + const struct of_device_id *match) +{ + struct pci_controller *phb; + + /* Check if we can do that ... */ + if (ppc_md.pci_setup_phb == NULL) + return -ENODEV; + + printk(KERN_INFO "Setting up PCI bus %s\n", dev->node->full_name); + + /* Alloc and setup PHB data structure */ + phb = pcibios_alloc_controller(dev->node); + if (!phb) + return -ENODEV; + + /* Setup parent in sysfs */ + phb->parent = &dev->dev; + + /* Setup the PHB using arch provided callback */ + if (ppc_md.pci_setup_phb(phb)) { + pcibios_free_controller(phb); + return -ENODEV; + } + + /* Process "ranges" property */ + pci_process_bridge_OF_ranges(phb, dev->node, 0); + + /* Init pci_dn data structures */ + pci_devs_phb_init_dynamic(phb); + + /* Register devices with EEH */ +#ifdef CONFIG_EEH + if (dev->node->child) + eeh_add_device_tree_early(dev->node); +#endif /* CONFIG_EEH */ + + /* Scan the bus */ + scan_phb(phb); + + /* Claim resources. This might need some rework as well depending + * wether we are doing probe-only or not, like assigning unassigned + * resources etc... + */ + pcibios_claim_one_bus(phb->bus); + + /* Finish EEH setup */ +#ifdef CONFIG_EEH + eeh_add_device_tree_late(phb->bus); +#endif + + /* Add probed PCI devices to the device model */ + pci_bus_add_devices(phb->bus); + + return 0; +} + +static struct of_device_id of_pci_phb_ids[] = { + { .type = "pci", }, + { .type = "pcix", }, + { .type = "pcie", }, + { .type = "pciex", }, + { .type = "ht", }, + {} +}; + +static struct of_platform_driver of_pci_phb_driver = { + .name = "of-pci", + .match_table = of_pci_phb_ids, + .probe = of_pci_phb_probe, +}; + +static __init int of_pci_phb_init(void) +{ + return of_register_platform_driver(&of_pci_phb_driver); +} + +device_initcall(of_pci_phb_init); + +#endif /* CONFIG_PPC_OF_PLATFORM_PCI */ diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c new file mode 100644 index 0000000..9cd534a --- /dev/null +++ b/arch/microblaze/kernel/prom.c @@ -0,0 +1,1248 @@ +/* + * Procedures for creating, accessing and interpreting the device tree. + * + * Paul Mackerras August 1996. + * Copyright (C) 1996-2005 Paul Mackerras. + * + * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. + * {engebret|bergner}@us.ibm.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#undef DEBUG + +#include <stdarg.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/threads.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/stringify.h> +#include <linux/delay.h> +#include <linux/initrd.h> +#include <linux/bitops.h> +#include <linux/module.h> +#include <linux/kexec.h> +#include <linux/debugfs.h> +#include <linux/irq.h> + +#include <asm/prom.h> +#include <asm/lmb.h> +#include <asm/page.h> +#include <asm/processor.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/system.h> +#include <asm/mmu.h> +#include <asm/pgtable.h> +#include <asm/pci.h> +#include <asm/sections.h> +#include <asm/pci-bridge.h> + +#ifdef DEBUG +#define DBG(fmt...) printk(KERN_ERR fmt) +#else +#define DBG(fmt...) +#endif + +extern char command_line[COMMAND_LINE_SIZE]; +u32 boot_cpuid; + +static int __initdata dt_root_addr_cells; +static int __initdata dt_root_size_cells; + +#ifdef CONFIG_PPC64 +int __initdata iommu_is_off; +int __initdata iommu_force_on; +unsigned long tce_alloc_start, tce_alloc_end; +#endif + +typedef u32 cell_t; + +struct boot_param_header *initial_boot_params; + +extern struct device_node *allnodes; /* temporary while merging */ + +extern rwlock_t devtree_lock; /* temporary while merging */ + +/* export that to outside world */ +struct device_node *of_chosen; + +static inline char *find_flat_dt_string(u32 offset) +{ + return ((char *)initial_boot_params) + + initial_boot_params->off_dt_strings + offset; +} + +/** + * This function is used to scan the flattened device-tree, it is + * used to extract the memory informations at boot before we can + * unflatten the tree + */ +int __init of_scan_flat_dt(int (*it)(unsigned long node, + const char *uname, int depth, + void *data), + void *data) +{ + unsigned long p = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + int rc = 0; + int depth = -1; + + do { + u32 tag = *((u32 *)p); + char *pathp; + + p += 4; + if (tag == OF_DT_END_NODE) { + depth--; + continue; + } + if (tag == OF_DT_NOP) + continue; + if (tag == OF_DT_END) + break; + if (tag == OF_DT_PROP) { + u32 sz = *((u32 *)p); + p += 8; + if (initial_boot_params->version < 0x10) + p = _ALIGN(p, sz >= 8 ? 8 : 4); + p += sz; + p = _ALIGN(p, 4); + continue; + } + if (tag != OF_DT_BEGIN_NODE) { + printk(KERN_WARNING "Invalid tag %x scanning flattened" + " device tree !\n", tag); + return -EINVAL; + } + depth++; + pathp = (char *)p; + p = _ALIGN(p + strlen(pathp) + 1, 4); + if ((*pathp) == '/') { + char *lp, *np; + for (lp = NULL, np = pathp; *np; np++) + if ((*np) == '/') + lp = np+1; + if (lp != NULL) + pathp = lp; + } + rc = it(p, pathp, depth, data); + if (rc != 0) + break; + } while (1); + + return rc; +} + +unsigned long __init of_get_flat_dt_root(void) +{ + unsigned long p = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + + while (*((u32 *)p) == OF_DT_NOP) + p += 4; + BUG_ON(*((u32 *)p) != OF_DT_BEGIN_NODE); + p += 4; + return _ALIGN(p + strlen((char *)p) + 1, 4); +} + +/** + * This function can be used within scan_flattened_dt callback to get + * access to properties + */ +void *__init of_get_flat_dt_prop(unsigned long node, const char *name, + unsigned long *size) +{ + unsigned long p = node; + + do { + u32 tag = *((u32 *)p); + u32 sz, noff; + const char *nstr; + + p += 4; + if (tag == OF_DT_NOP) + continue; + if (tag != OF_DT_PROP) + return NULL; + + sz = *((u32 *)p); + noff = *((u32 *)(p + 4)); + p += 8; + if (initial_boot_params->version < 0x10) + p = _ALIGN(p, sz >= 8 ? 8 : 4); + + nstr = find_flat_dt_string(noff); + if (nstr == NULL) { + printk(KERN_WARNING "Can't find property index" + " name !\n"); + return NULL; + } + if (strcmp(name, nstr) == 0) { + if (size) + *size = sz; + return (void *)p; + } + p += sz; + p = _ALIGN(p, 4); + } while (1); +} + +int __init of_flat_dt_is_compatible(unsigned long node, const char *compat) +{ + const char *cp; + unsigned long cplen, l; + + cp = of_get_flat_dt_prop(node, "compatible", &cplen); + if (cp == NULL) + return 0; + while (cplen > 0) { + if (strncasecmp(cp, compat, strlen(compat)) == 0) + return 1; + l = strlen(cp) + 1; + cp += l; + cplen -= l; + } + + return 0; +} + +static void *__init unflatten_dt_alloc(unsigned long *mem, unsigned long size, + unsigned long align) +{ + void *res; + + *mem = _ALIGN(*mem, align); + res = (void *)*mem; + *mem += size; + + return res; +} + +static unsigned long __init unflatten_dt_node(unsigned long mem, + unsigned long *p, + struct device_node *dad, + struct device_node ***allnextpp, + unsigned long fpsize) +{ + struct device_node *np; + struct property *pp, **prev_pp = NULL; + char *pathp; + u32 tag; + unsigned int l, allocl; + int has_name = 0; + int new_format = 0; + + tag = *((u32 *)(*p)); + if (tag != OF_DT_BEGIN_NODE) { + printk("Weird tag at start of node: %x\n", tag); + return mem; + } + *p += 4; + pathp = (char *)*p; + l = allocl = strlen(pathp) + 1; + *p = _ALIGN(*p + l, 4); + + /* version 0x10 has a more compact unit name here instead of the full + * path. we accumulate the full path size using "fpsize", we'll rebuild + * it later. We detect this because the first character of the name is + * not '/'. + */ + if ((*pathp) != '/') { + new_format = 1; + if (fpsize == 0) { + /* root node: special case. fpsize accounts for path + * plus terminating zero. root node only has '/', so + * fpsize should be 2, but we want to avoid the first + * level nodes to have two '/' so we use fpsize 1 here + */ + fpsize = 1; + allocl = 2; + } else { + /* account for '/' and path size minus terminal 0 + * already in 'l' + */ + fpsize += l; + allocl = fpsize; + } + } + + np = unflatten_dt_alloc(&mem, sizeof(struct device_node) + allocl, + __alignof__(struct device_node)); + if (allnextpp) { + memset(np, 0, sizeof(*np)); + np->full_name = ((char *)np) + sizeof(struct device_node); + if (new_format) { + char *p = np->full_name; + /* rebuild full path for new format */ + if (dad && dad->parent) { + strcpy(p, dad->full_name); +#ifdef DEBUG + if ((strlen(p) + l + 1) != allocl) { + DBG("%s: p: %d, l: %d, a: %d\n", + pathp, (int)strlen(p), + l, allocl); + } +#endif + p += strlen(p); + } + *(p++) = '/'; + memcpy(p, pathp, l); + } else + memcpy(np->full_name, pathp, l); + prev_pp = &np->properties; + **allnextpp = np; + *allnextpp = &np->allnext; + if (dad != NULL) { + np->parent = dad; + /* we temporarily use the next field as `last_child'*/ + if (dad->next == 0) + dad->child = np; + else + dad->next->sibling = np; + dad->next = np; + } + kref_init(&np->kref); + } + while (1) { + u32 sz, noff; + char *pname; + + tag = *((u32 *)(*p)); + if (tag == OF_DT_NOP) { + *p += 4; + continue; + } + if (tag != OF_DT_PROP) + break; + *p += 4; + sz = *((u32 *)(*p)); + noff = *((u32 *)((*p) + 4)); + *p += 8; + if (initial_boot_params->version < 0x10) + *p = _ALIGN(*p, sz >= 8 ? 8 : 4); + + pname = find_flat_dt_string(noff); + if (pname == NULL) { + printk(KERN_INFO + "Can't find property name in list !\n"); + break; + } + if (strcmp(pname, "name") == 0) + has_name = 1; + l = strlen(pname) + 1; + pp = unflatten_dt_alloc(&mem, sizeof(struct property), + __alignof__(struct property)); + if (allnextpp) { + if (strcmp(pname, "linux,phandle") == 0) { + np->node = *((u32 *)*p); + if (np->linux_phandle == 0) + np->linux_phandle = np->node; + } + if (strcmp(pname, "ibm,phandle") == 0) + np->linux_phandle = *((u32 *)*p); + pp->name = pname; + pp->length = sz; + pp->value = (void *)*p; + *prev_pp = pp; + prev_pp = &pp->next; + } + *p = _ALIGN((*p) + sz, 4); + } + /* with version 0x10 we may not have the name property, recreate + * it here from the unit name if absent + */ + if (!has_name) { + char *p = pathp, *ps = pathp, *pa = NULL; + int sz; + + while (*p) { + if ((*p) == '@') + pa = p; + if ((*p) == '/') + ps = p + 1; + p++; + } + if (pa < ps) + pa = p; + sz = (pa - ps) + 1; + pp = unflatten_dt_alloc(&mem, sizeof(struct property) + sz, + __alignof__(struct property)); + if (allnextpp) { + pp->name = "name"; + pp->length = sz; + pp->value = pp + 1; + *prev_pp = pp; + prev_pp = &pp->next; + memcpy(pp->value, ps, sz - 1); + ((char *)pp->value)[sz - 1] = 0; + DBG("fixed up name for %s -> %s\n", pathp, + (char *)pp->value); + } + } + if (allnextpp) { + *prev_pp = NULL; + np->name = of_get_property(np, "name", NULL); + np->type = of_get_property(np, "device_type", NULL); + + if (!np->name) + np->name = "<NULL>"; + if (!np->type) + np->type = "<NULL>"; + } + while (tag == OF_DT_BEGIN_NODE) { + mem = unflatten_dt_node(mem, p, np, allnextpp, fpsize); + tag = *((u32 *)(*p)); + } + if (tag != OF_DT_END_NODE) { + printk(KERN_INFO "Weird tag at end of node: %x\n", tag); + return mem; + } + *p += 4; + return mem; +} + +/** + * unflattens the device-tree passed by the firmware, creating the + * tree of struct device_node. It also fills the "name" and "type" + * pointers of the nodes so the normal device-tree walking functions + * can be used (this used to be done by finish_device_tree) + */ +void __init unflatten_device_tree(void) +{ + unsigned long start, mem, size; + struct device_node **allnextp = &allnodes; + + DBG(" -> unflatten_device_tree()\n"); + + /* First pass, scan for size */ + start = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + size = unflatten_dt_node(0, &start, NULL, NULL, 0); + size = (size | 3) + 1; + + DBG(" size is %lx, allocating...\n", size); + + /* Allocate memory for the expanded device tree */ + mem = lmb_alloc(size + 4, __alignof__(struct device_node)); + mem = (unsigned long) __va(mem); + + ((u32 *)mem)[size / 4] = 0xdeadbeef; + + DBG(" unflattening %lx...\n", mem); + + /* Second pass, do actual unflattening */ + start = ((unsigned long)initial_boot_params) + + initial_boot_params->off_dt_struct; + unflatten_dt_node(mem, &start, NULL, &allnextp, 0); + if (*((u32 *)start) != OF_DT_END) + printk(KERN_WARNING "Weird tag at end of tree: %08x\n", + *((u32 *)start)); + if (((u32 *)mem)[size / 4] != 0xdeadbeef) + printk(KERN_WARNING "End of tree marker overwritten: %08x\n", + ((u32 *)mem)[size / 4]); + *allnextp = NULL; + + /* Get pointer to OF "/chosen" node for use everywhere */ + of_chosen = of_find_node_by_path("/chosen"); + if (of_chosen == NULL) + of_chosen = of_find_node_by_path("/chosen@0"); + + DBG(" <- unflatten_device_tree()\n"); +} + +static int __init early_init_dt_scan_cpus(unsigned long node, + const char *uname, int depth, + void *data) +{ + static int logical_cpuid; + char *type = of_get_flat_dt_prop(node, "device_type", NULL); + const u32 *intserv; + int i, nthreads; + unsigned long len; + int found = 0; + + /* We are scanning "cpu" nodes only */ + if (type == NULL || strcmp(type, "cpu") != 0) + return 0; + + /* Get physical cpuid */ + intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len); + if (intserv) { + nthreads = len / sizeof(int); + } else { + intserv = of_get_flat_dt_prop(node, "reg", NULL); + nthreads = 1; + } + + /* + * Now see if any of these threads match our boot cpu. + * NOTE: This must match the parsing done in smp_setup_cpu_maps. + */ + for (i = 0; i < nthreads; i++) { + /* + * version 2 of the kexec param format adds the phys cpuid of + * booted proc. + */ + if (initial_boot_params && initial_boot_params->version >= 2) { + if (intserv[i] == + initial_boot_params->boot_cpuid_phys) { + found = 1; + break; + } + } else { + /* + * Check if it's the boot-cpu, set it's hw index now, + * unfortunately this format did not support booting + * off secondary threads. + */ + if (of_get_flat_dt_prop(node, + "linux,boot-cpu", NULL) != NULL) { + found = 1; + break; + } + } + +#ifdef CONFIG_SMP + /* logical cpu id is always 0 on UP kernels */ + logical_cpuid++; +#endif + } + + if (found) { + DBG("boot cpu: logical %d physical %d\n", logical_cpuid, + intserv[i]); + boot_cpuid = logical_cpuid; + } + +#ifdef CONFIG_PPC_PSERIES + if (nthreads > 1) + cur_cpu_spec->cpu_features |= CPU_FTR_SMT; + else + cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT; +#endif + + return 0; +} + +#ifdef CONFIG_BLK_DEV_INITRD +static void __init early_init_dt_check_for_initrd(unsigned long node) +{ + unsigned long l; + u32 *prop; + + DBG("Looking for initrd properties... "); + + prop = of_get_flat_dt_prop(node, "linux,initrd-start", &l); + if (prop) { + initrd_start = (unsigned long)__va(of_read_ulong(prop, l/4)); + + prop = of_get_flat_dt_prop(node, "linux,initrd-end", &l); + if (prop) { + initrd_end = (unsigned long) + __va(of_read_ulong(prop, l/4)); + initrd_below_start_ok = 1; + } else { + initrd_start = 0; + } + } + + DBG("initrd_start=0x%lx initrd_end=0x%lx\n", initrd_start, initrd_end); +} +#else +static inline void early_init_dt_check_for_initrd(unsigned long node) +{ +} +#endif /* CONFIG_BLK_DEV_INITRD */ + +static int __init early_init_dt_scan_chosen(unsigned long node, + const char *uname, int depth, void *data) +{ + unsigned long l; + char *p; + + DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname); + + if (depth != 1 || + (strcmp(uname, "chosen") != 0 && + strcmp(uname, "chosen@0") != 0)) + return 0; + +#ifdef CONFIG_PPC64 + /* check if iommu is forced on or off */ + if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL) + iommu_is_off = 1; + if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL) + iommu_force_on = 1; +#endif + +#ifdef CONFIG_PPC64 + lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL); + if (lprop) + tce_alloc_start = *lprop; + lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL); + if (lprop) + tce_alloc_end = *lprop; +#endif + +#ifdef CONFIG_KEXEC + lprop = (u64 *)of_get_flat_dt_prop(node, + "linux,crashkernel-base", NULL); + if (lprop) + crashk_res.start = *lprop; + + lprop = (u64 *)of_get_flat_dt_prop(node, + "linux,crashkernel-size", NULL); + if (lprop) + crashk_res.end = crashk_res.start + *lprop - 1; +#endif + + early_init_dt_check_for_initrd(node); + + /* Retreive command line */ + p = of_get_flat_dt_prop(node, "bootargs", &l); + if (p != NULL && l > 0) + strlcpy(command_line, p, min((int)l, COMMAND_LINE_SIZE)); + +#ifdef CONFIG_CMDLINE + if (p == NULL || l == 0 || (l == 1 && (*p) == 0)) + strlcpy(command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); +#endif /* CONFIG_CMDLINE */ + + DBG("Command line is: %s\n", command_line); + + /* break now */ + return 1; +} + +static int __init early_init_dt_scan_root(unsigned long node, + const char *uname, int depth, void *data) +{ + u32 *prop; + + if (depth != 0) + return 0; + + prop = of_get_flat_dt_prop(node, "#size-cells", NULL); + dt_root_size_cells = (prop == NULL) ? 1 : *prop; + DBG("dt_root_size_cells = %x\n", dt_root_size_cells); + + prop = of_get_flat_dt_prop(node, "#address-cells", NULL); + dt_root_addr_cells = (prop == NULL) ? 2 : *prop; + DBG("dt_root_addr_cells = %x\n", dt_root_addr_cells); + + /* break now */ + return 1; +} + +static unsigned long __init dt_mem_next_cell(int s, cell_t **cellp) +{ + cell_t *p = *cellp; + + *cellp = p + s; + return of_read_ulong(p, s); +} + +#ifdef CONFIG_PPC_PSERIES +/* + * Interpret the ibm,dynamic-memory property in the + * /ibm,dynamic-reconfiguration-memory node. + * This contains a list of memory blocks along with NUMA affinity + * information. + */ +static int __init early_init_dt_scan_drconf_memory(unsigned long node) +{ + cell_t *dm, *ls; + unsigned long l, n; + unsigned long base, size, lmb_size, flags; + + ls = (cell_t *)of_get_flat_dt_prop(node, "ibm,lmb-size", &l); + if (ls == NULL || l < dt_root_size_cells * sizeof(cell_t)) + return 0; + lmb_size = dt_mem_next_cell(dt_root_size_cells, &ls); + + dm = (cell_t *)of_get_flat_dt_prop(node, "ibm,dynamic-memory", &l); + if (dm == NULL || l < sizeof(cell_t)) + return 0; + + n = *dm++; /* number of entries */ + if (l < (n * (dt_root_addr_cells + 4) + 1) * sizeof(cell_t)) + return 0; + + for (; n != 0; --n) { + base = dt_mem_next_cell(dt_root_addr_cells, &dm); + flags = dm[3]; + /* skip DRC index, pad, assoc. list index, flags */ + dm += 4; + /* skip this block if the reserved bit is set in flags (0x80) + or if the block is not assigned to this partition (0x8) */ + if ((flags & 0x80) || !(flags & 0x8)) + continue; + size = lmb_size; + if (iommu_is_off) { + if (base >= 0x80000000ul) + continue; + if ((base + size) > 0x80000000ul) + size = 0x80000000ul - base; + } + lmb_add(base, size); + } + lmb_dump_all(); + return 0; +} +#else +#define early_init_dt_scan_drconf_memory(node) 0 +#endif /* CONFIG_PPC_PSERIES */ + +static int __init early_init_dt_scan_memory(unsigned long node, + const char *uname, int depth, void *data) +{ + char *type = of_get_flat_dt_prop(node, "device_type", NULL); + cell_t *reg, *endp; + unsigned long l; + + /* Look for the ibm,dynamic-reconfiguration-memory node */ + if (depth == 1 && + strcmp(uname, "ibm,dynamic-reconfiguration-memory") == 0) + return early_init_dt_scan_drconf_memory(node); + + /* We are scanning "memory" nodes only */ + if (type == NULL) { + /* + * The longtrail doesn't have a device_type on the + * /memory node, so look for the node called /memory@0. + */ + if (depth != 1 || strcmp(uname, "memory@0") != 0) + return 0; + } else if (strcmp(type, "memory") != 0) + return 0; + + reg = (cell_t *)of_get_flat_dt_prop(node, "linux,usable-memory", &l); + if (reg == NULL) + reg = (cell_t *)of_get_flat_dt_prop(node, "reg", &l); + if (reg == NULL) + return 0; + + endp = reg + (l / sizeof(cell_t)); + + DBG("memory scan node %s, reg size %ld, data: %x %x %x %x,\n", + uname, l, reg[0], reg[1], reg[2], reg[3]); + + while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) { + unsigned long base, size; + + base = dt_mem_next_cell(dt_root_addr_cells, ®); + size = dt_mem_next_cell(dt_root_size_cells, ®); + + if (size == 0) + continue; + DBG(" - %lx , %lx\n", base, size); +#ifdef CONFIG_PPC64 + if (iommu_is_off) { + if (base >= 0x80000000ul) + continue; + if ((base + size) > 0x80000000ul) + size = 0x80000000ul - base; + } +#endif + lmb_add(base, size); + } + return 0; +} + +void __init early_init_devtree(void *params) +{ + DBG(" -> early_init_devtree(%p)\n", params); + + /* Setup flat device-tree pointer */ + initial_boot_params = params; + +#ifdef CONFIG_PPC_RTAS + /* Some machines might need RTAS info for debugging, grab it now. */ + of_scan_flat_dt(early_init_dt_scan_rtas, NULL); +#endif + + /* Retrieve various informations from the /chosen node of the + * device-tree, including the platform type, initrd location and + * size, TCE reserve, and more ... + */ + of_scan_flat_dt(early_init_dt_scan_chosen, NULL); + + /* Scan memory nodes and rebuild LMBs */ + lmb_init(); + of_scan_flat_dt(early_init_dt_scan_root, NULL); + of_scan_flat_dt(early_init_dt_scan_memory, NULL); + + /* Save command line for /proc/cmdline and then parse parameters */ + strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); + parse_early_param(); + + lmb_analyze(); + + DBG("Phys. mem: %lx\n", lmb_phys_mem_size()); + + DBG("Scanning CPUs ...\n"); + + /* Retreive CPU related informations from the flat tree + * (altivec support, boot CPU ID, ...) + */ + of_scan_flat_dt(early_init_dt_scan_cpus, NULL); + + DBG(" <- early_init_devtree()\n"); +} + +/** + * Indicates whether the root node has a given value in its + * compatible property. + */ +int machine_is_compatible(const char *compat) +{ + struct device_node *root; + int rc = 0; + + root = of_find_node_by_path("/"); + if (root) { + rc = of_device_is_compatible(root, compat); + of_node_put(root); + } + return rc; +} +EXPORT_SYMBOL(machine_is_compatible); + +/******* + * + * New implementation of the OF "find" APIs, return a refcounted + * object, call of_node_put() when done. The device tree and list + * are protected by a rw_lock. + * + * Note that property management will need some locking as well, + * this isn't dealt with yet. + * + *******/ + +/** + * of_find_node_by_phandle - Find a node given a phandle + * @handle: phandle of the node to find + * + * Returns a node pointer with refcount incremented, use + * of_node_put() on it when done. + */ +struct device_node *of_find_node_by_phandle(phandle handle) +{ + struct device_node *np; + + read_lock(&devtree_lock); + for (np = allnodes; np != 0; np = np->allnext) + if (np->linux_phandle == handle) + break; + of_node_get(np); + read_unlock(&devtree_lock); + return np; +} +EXPORT_SYMBOL(of_find_node_by_phandle); + +/** + * of_find_all_nodes - Get next node in global list + * @prev: Previous node or NULL to start iteration + * of_node_put() will be called on it + * + * Returns a node pointer with refcount incremented, use + * of_node_put() on it when done. + */ +struct device_node *of_find_all_nodes(struct device_node *prev) +{ + struct device_node *np; + + read_lock(&devtree_lock); + np = prev ? prev->allnext : allnodes; + for (; np != 0; np = np->allnext) + if (of_node_get(np)) + break; + of_node_put(prev); + read_unlock(&devtree_lock); + return np; +} +EXPORT_SYMBOL(of_find_all_nodes); + +/** + * of_node_get - Increment refcount of a node + * @node: Node to inc refcount, NULL is supported to + * simplify writing of callers + * + * Returns node. + */ +struct device_node *of_node_get(struct device_node *node) +{ + if (node) + kref_get(&node->kref); + return node; +} +EXPORT_SYMBOL(of_node_get); + +static inline struct device_node *kref_to_device_node(struct kref *kref) +{ + return container_of(kref, struct device_node, kref); +} + +/** + * of_node_release - release a dynamically allocated node + * @kref: kref element of the node to be released + * + * In of_node_put() this function is passed to kref_put() + * as the destructor. + */ +static void of_node_release(struct kref *kref) +{ + struct device_node *node = kref_to_device_node(kref); + struct property *prop = node->properties; + + /* We should never be releasing nodes that haven't been detached. */ + if (!of_node_check_flag(node, OF_DETACHED)) { + printk(KERN_INFO "WARNING: Bad of_node_put() on %s\n", + node->full_name); + dump_stack(); + kref_init(&node->kref); + return; + } + + if (!of_node_check_flag(node, OF_DYNAMIC)) + return; + + while (prop) { + struct property *next = prop->next; + kfree(prop->name); + kfree(prop->value); + kfree(prop); + prop = next; + + if (!prop) { + prop = node->deadprops; + node->deadprops = NULL; + } + } + kfree(node->full_name); + kfree(node->data); + kfree(node); +} + +/** + * of_node_put - Decrement refcount of a node + * @node: Node to dec refcount, NULL is supported to + * simplify writing of callers + * + */ +void of_node_put(struct device_node *node) +{ + if (node) + kref_put(&node->kref, of_node_release); +} +EXPORT_SYMBOL(of_node_put); + +/* + * Plug a device node into the tree and global list. + */ +void of_attach_node(struct device_node *np) +{ + write_lock(&devtree_lock); + np->sibling = np->parent->child; + np->allnext = allnodes; + np->parent->child = np; + allnodes = np; + write_unlock(&devtree_lock); +} + +/* + * "Unplug" a node from the device tree. The caller must hold + * a reference to the node. The memory associated with the node + * is not freed until its refcount goes to zero. + */ +void of_detach_node(struct device_node *np) +{ + struct device_node *parent; + + write_lock(&devtree_lock); + + parent = np->parent; + if (!parent) + goto out_unlock; + + if (allnodes == np) + allnodes = np->allnext; + else { + struct device_node *prev; + for (prev = allnodes; + prev->allnext != np; + prev = prev->allnext) + ; + prev->allnext = np->allnext; + } + + if (parent->child == np) + parent->child = np->sibling; + else { + struct device_node *prevsib; + for (prevsib = np->parent->child; + prevsib->sibling != np; + prevsib = prevsib->sibling) + ; + prevsib->sibling = np->sibling; + } + + of_node_set_flag(np, OF_DETACHED); + +out_unlock: + write_unlock(&devtree_lock); +} + +#ifdef CONFIG_PPC_PSERIES +/* + * Fix up the uninitialized fields in a new device node: + * name, type and pci-specific fields + */ + +static int of_finish_dynamic_node(struct device_node *node) +{ + struct device_node *parent = of_get_parent(node); + int err = 0; + const phandle *ibm_phandle; + + node->name = of_get_property(node, "name", NULL); + node->type = of_get_property(node, "device_type", NULL); + + if (!node->name) + node->name = "<NULL>"; + if (!node->type) + node->type = "<NULL>"; + + if (!parent) { + err = -ENODEV; + goto out; + } + + /* We don't support that function on PowerMac, at least + * not yet + */ + if (machine_is(powermac)) + return -ENODEV; + + /* fix up new node's linux_phandle field */ + if ((ibm_phandle = of_get_property(node, "ibm,phandle", NULL))) + node->linux_phandle = *ibm_phandle; + +out: + of_node_put(parent); + return err; +} + +static int prom_reconfig_notifier(struct notifier_block *nb, + unsigned long action, void *node) +{ + int err; + + switch (action) { + case PSERIES_RECONFIG_ADD: + err = of_finish_dynamic_node(node); + if (err < 0) { + printk(KERN_ERR "finish_node returned %d\n", err); + err = NOTIFY_BAD; + } + break; + default: + err = NOTIFY_DONE; + break; + } + return err; +} + +static struct notifier_block prom_reconfig_nb = { + .notifier_call = prom_reconfig_notifier, + .priority = 10, /* This one needs to run first */ +}; + +static int __init prom_reconfig_setup(void) +{ + return pSeries_reconfig_notifier_register(&prom_reconfig_nb); +} +__initcall(prom_reconfig_setup); +#endif + +/* + * Add a property to a node + */ +int prom_add_property(struct device_node *np, struct property *prop) +{ + struct property **next; + + prop->next = NULL; + write_lock(&devtree_lock); + next = &np->properties; + while (*next) { + if (strcmp(prop->name, (*next)->name) == 0) { + /* duplicate ! don't insert it */ + write_unlock(&devtree_lock); + return -1; + } + next = &(*next)->next; + } + *next = prop; + write_unlock(&devtree_lock); + +#ifdef CONFIG_PROC_DEVICETREE + /* try to add to proc as well if it was initialized */ + if (np->pde) + proc_device_tree_add_prop(np->pde, prop); +#endif /* CONFIG_PROC_DEVICETREE */ + + return 0; +} + +/* + * Remove a property from a node. Note that we don't actually + * remove it, since we have given out who-knows-how-many pointers + * to the data using get-property. Instead we just move the property + * to the "dead properties" list, so it won't be found any more. + */ +int prom_remove_property(struct device_node *np, struct property *prop) +{ + struct property **next; + int found = 0; + + write_lock(&devtree_lock); + next = &np->properties; + while (*next) { + if (*next == prop) { + /* found the node */ + *next = prop->next; + prop->next = np->deadprops; + np->deadprops = prop; + found = 1; + break; + } + next = &(*next)->next; + } + write_unlock(&devtree_lock); + + if (!found) + return -ENODEV; + +#ifdef CONFIG_PROC_DEVICETREE + /* try to remove the proc node as well */ + if (np->pde) + proc_device_tree_remove_prop(np->pde, prop); +#endif /* CONFIG_PROC_DEVICETREE */ + + return 0; +} + +/* + * Update a property in a node. Note that we don't actually + * remove it, since we have given out who-knows-how-many pointers + * to the data using get-property. Instead we just move the property + * to the "dead properties" list, and add the new property to the + * property list + */ +int prom_update_property(struct device_node *np, + struct property *newprop, + struct property *oldprop) +{ + struct property **next; + int found = 0; + + write_lock(&devtree_lock); + next = &np->properties; + while (*next) { + if (*next == oldprop) { + /* found the node */ + newprop->next = oldprop->next; + *next = newprop; + oldprop->next = np->deadprops; + np->deadprops = oldprop; + found = 1; + break; + } + next = &(*next)->next; + } + write_unlock(&devtree_lock); + + if (!found) + return -ENODEV; + +#ifdef CONFIG_PROC_DEVICETREE + /* try to add to proc as well if it was initialized */ + if (np->pde) + proc_device_tree_update_prop(np->pde, newprop, oldprop); +#endif /* CONFIG_PROC_DEVICETREE */ + + return 0; +} + +/* Find the device node for a given logical cpu number, also returns the cpu + * local thread number (index in ibm,interrupt-server#s) if relevant and + * asked for (non NULL) + */ +struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) +{ + int hardid; + struct device_node *np; + + hardid = boot_cpuid; /* get_hard_smp_processor_id(cpu);*/ + + for_each_node_by_type(np, "cpu") { + const u32 *intserv; + unsigned int plen, t; + + /* Check for ibm,ppc-interrupt-server#s. If it doesn't exist + * fallback to "reg" property and assume no threads + */ + intserv = of_get_property(np, "ibm,ppc-interrupt-server#s", + &plen); + if (intserv == NULL) { + const u32 *reg = of_get_property(np, "reg", NULL); + if (reg == NULL) + continue; + if (*reg == hardid) { + if (thread) + *thread = 0; + return np; + } + } else { + plen /= sizeof(u32); + for (t = 0; t < plen; t++) { + if (hardid == intserv[t]) { + if (thread) + *thread = t; + return np; + } + } + } + } + return NULL; +} +EXPORT_SYMBOL(of_get_cpu_node); + +#if defined(CONFIG_DEBUG_FS) && defined(DEBUG) +static struct debugfs_blob_wrapper flat_dt_blob; + +static int __init export_flat_device_tree(void) +{ + struct dentry *d; + + flat_dt_blob.data = initial_boot_params; + flat_dt_blob.size = initial_boot_params->totalsize; + + d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR, + powerpc_debugfs_root, &flat_dt_blob); + if (!d) + return 1; + + return 0; +} +__initcall(export_flat_device_tree); +#endif diff --git a/arch/microblaze/kernel/prom_parse.c b/arch/microblaze/kernel/prom_parse.c new file mode 100644 index 0000000..eeb96dd --- /dev/null +++ b/arch/microblaze/kernel/prom_parse.c @@ -0,0 +1,1033 @@ +#undef DEBUG + +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/pci_regs.h> +#include <linux/module.h> +#include <linux/ioport.h> +#include <linux/etherdevice.h> +#include <asm/prom.h> +#include <asm/pci-bridge.h> + +#ifdef CONFIG_PPC64 +#define PRu64 "%lx" +#else +#define PRu64 "%llx" +#endif + +/* Max address size we deal with */ +#define OF_MAX_ADDR_CELLS 4 +#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \ + (ns) > 0) + +static struct of_bus *of_match_bus(struct device_node *np); +static int __of_address_to_resource(struct device_node *dev, + const u32 *addrp, u64 size, unsigned int flags, + struct resource *r); + +/* Debug utility */ +#ifdef DEBUG +static void of_dump_addr(const char *s, const u32 *addr, int na) +{ + printk(KERN_INFO "%s", s); + while (na--) + printk(KERN_INFO " %08x", *(addr++)); + printk(KERN_INFO "\n"); +} +#else +static void of_dump_addr(const char *s, const u32 *addr, int na) { } +#endif + +/* Callbacks for bus specific translators */ +struct of_bus { + const char *name; + const char *addresses; + int (*match)(struct device_node *parent); + void (*count_cells)(struct device_node *child, + int *addrc, int *sizec); + u64 (*map)(u32 *addr, const u32 *range, + int na, int ns, int pna); + int (*translate)(u32 *addr, u64 offset, int na); + unsigned int (*get_flags)(const u32 *addr); +}; + +/* + * Default translator (generic bus) + */ + +static void of_bus_default_count_cells(struct device_node *dev, + int *addrc, int *sizec) +{ + if (addrc) + *addrc = of_n_addr_cells(dev); + if (sizec) + *sizec = of_n_size_cells(dev); +} + +static u64 of_bus_default_map(u32 *addr, const u32 *range, + int na, int ns, int pna) +{ + u64 cp, s, da; + + cp = of_read_number(range, na); + s = of_read_number(range + na + pna, ns); + da = of_read_number(addr, na); + + pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n", + cp, s, da); + + if (da < cp || da >= (cp + s)) + return OF_BAD_ADDR; + return da - cp; +} + +static int of_bus_default_translate(u32 *addr, u64 offset, int na) +{ + u64 a = of_read_number(addr, na); + memset(addr, 0, na * 4); + a += offset; + if (na > 1) + addr[na - 2] = a >> 32; + addr[na - 1] = a & 0xffffffffu; + + return 0; +} + +static unsigned int of_bus_default_get_flags(const u32 *addr) +{ + return IORESOURCE_MEM; +} + +#ifdef CONFIG_PCI +/* + * PCI bus specific translator + */ + +static int of_bus_pci_match(struct device_node *np) +{ + /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */ + return !strcmp(np->type, "pci") || !strcmp(np->type, "vci"); +} + +static void of_bus_pci_count_cells(struct device_node *np, + int *addrc, int *sizec) +{ + if (addrc) + *addrc = 3; + if (sizec) + *sizec = 2; +} + +static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna) +{ + u64 cp, s, da; + + /* Check address type match */ + if ((addr[0] ^ range[0]) & 0x03000000) + return OF_BAD_ADDR; + + /* Read address values, skipping high cell */ + cp = of_read_number(range + 1, na - 1); + s = of_read_number(range + na + pna, ns); + da = of_read_number(addr + 1, na - 1); + + pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da); + + if (da < cp || da >= (cp + s)) + return OF_BAD_ADDR; + return da - cp; +} + +static int of_bus_pci_translate(u32 *addr, u64 offset, int na) +{ + return of_bus_default_translate(addr + 1, offset, na - 1); +} + +static unsigned int of_bus_pci_get_flags(const u32 *addr) +{ + unsigned int flags = 0; + u32 w = addr[0]; + + switch ((w >> 24) & 0x03) { + case 0x01: + flags |= IORESOURCE_IO; + break; + case 0x02: /* 32 bits */ + case 0x03: /* 64 bits */ + flags |= IORESOURCE_MEM; + break; + } + if (w & 0x40000000) + flags |= IORESOURCE_PREFETCH; + return flags; +} + +const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size, + unsigned int *flags) +{ + const u32 *prop; + unsigned int psize; + struct device_node *parent; + struct of_bus *bus; + int onesize, i, na, ns; + + /* Get parent & match bus type */ + parent = of_get_parent(dev); + if (parent == NULL) + return NULL; + bus = of_match_bus(parent); + if (strcmp(bus->name, "pci")) { + of_node_put(parent); + return NULL; + } + bus->count_cells(dev, &na, &ns); + of_node_put(parent); + if (!OF_CHECK_COUNTS(na, ns)) + return NULL; + + /* Get "reg" or "assigned-addresses" property */ + prop = of_get_property(dev, bus->addresses, &psize); + if (prop == NULL) + return NULL; + psize /= 4; + + onesize = na + ns; + for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) + if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) { + if (size) + *size = of_read_number(prop + na, ns); + if (flags) + *flags = bus->get_flags(prop); + return prop; + } + return NULL; +} +EXPORT_SYMBOL(of_get_pci_address); + +int of_pci_address_to_resource(struct device_node *dev, int bar, + struct resource *r) +{ + const u32 *addrp; + u64 size; + unsigned int flags; + + addrp = of_get_pci_address(dev, bar, &size, &flags); + if (addrp == NULL) + return -EINVAL; + return __of_address_to_resource(dev, addrp, size, flags, r); +} +EXPORT_SYMBOL_GPL(of_pci_address_to_resource); + +static u8 of_irq_pci_swizzle(u8 slot, u8 pin) +{ + return (((pin - 1) + slot) % 4) + 1; +} + +int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq) +{ + struct device_node *dn, *ppnode; + struct pci_dev *ppdev; + u32 lspec; + u32 laddr[3]; + u8 pin; + int rc; + + /* Check if we have a device node, if yes, fallback to standard OF + * parsing + */ + dn = pci_device_to_OF_node(pdev); + if (dn) + return of_irq_map_one(dn, 0, out_irq); + + /* Ok, we don't, time to have fun. Let's start by building up an + * interrupt spec. we assume #interrupt-cells is 1, which is standard + * for PCI. If you do different, then don't use that routine. + */ + rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin); + if (rc != 0) + return rc; + /* No pin, exit */ + if (pin == 0) + return -ENODEV; + + /* Now we walk up the PCI tree */ + lspec = pin; + for (;;) { + /* Get the pci_dev of our parent */ + ppdev = pdev->bus->self; + + /* Ouch, it's a host bridge... */ + if (ppdev == NULL) { +#ifdef CONFIG_PPC64 + ppnode = pci_bus_to_OF_node(pdev->bus); +#else + struct pci_controller *host; + host = pci_bus_to_host(pdev->bus); + ppnode = host ? host->arch_data : NULL; +#endif + /* No node for host bridge ? give up */ + if (ppnode == NULL) + return -EINVAL; + } else + /* We found a P2P bridge, check if it has a node */ + ppnode = pci_device_to_OF_node(ppdev); + + /* Ok, we have found a parent with a device-node, hand over to + * the OF parsing code. + * We build a unit address from the linux device to be used for + * resolution. Note that we use the linux bus number which may + * not match your firmware bus numbering. + * Fortunately, in most cases, interrupt-map-mask doesn't + * include the bus number as part of the matching. + * You should still be careful about that though if you intend + * to rely on this function (you ship a firmware that doesn't + * create device nodes for all PCI devices). + */ + if (ppnode) + break; + + /* We can only get here if we hit a P2P bridge with no node, + * let's do standard swizzling and try again + */ + lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec); + pdev = ppdev; + } + + laddr[0] = (pdev->bus->number << 16) + | (pdev->devfn << 8); + laddr[1] = laddr[2] = 0; + return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq); +} +EXPORT_SYMBOL_GPL(of_irq_map_pci); +#endif /* CONFIG_PCI */ + +/* + * ISA bus specific translator + */ + +static int of_bus_isa_match(struct device_node *np) +{ + return !strcmp(np->name, "isa"); +} + +static void of_bus_isa_count_cells(struct device_node *child, + int *addrc, int *sizec) +{ + if (addrc) + *addrc = 2; + if (sizec) + *sizec = 1; +} + +static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna) +{ + u64 cp, s, da; + + /* Check address type match */ + if ((addr[0] ^ range[0]) & 0x00000001) + return OF_BAD_ADDR; + + /* Read address values, skipping high cell */ + cp = of_read_number(range + 1, na - 1); + s = of_read_number(range + na + pna, ns); + da = of_read_number(addr + 1, na - 1); + + pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da); + + if (da < cp || da >= (cp + s)) + return OF_BAD_ADDR; + return da - cp; +} + +static int of_bus_isa_translate(u32 *addr, u64 offset, int na) +{ + return of_bus_default_translate(addr + 1, offset, na - 1); +} + +static unsigned int of_bus_isa_get_flags(const u32 *addr) +{ + unsigned int flags = 0; + u32 w = addr[0]; + + if (w & 1) + flags |= IORESOURCE_IO; + else + flags |= IORESOURCE_MEM; + return flags; +} + +/* + * Array of bus specific translators + */ + +static struct of_bus of_busses[] = { +#ifdef CONFIG_PCI + /* PCI */ + { + .name = "pci", + .addresses = "assigned-addresses", + .match = of_bus_pci_match, + .count_cells = of_bus_pci_count_cells, + .map = of_bus_pci_map, + .translate = of_bus_pci_translate, + .get_flags = of_bus_pci_get_flags, + }, +#endif /* CONFIG_PCI */ + /* ISA */ + { + .name = "isa", + .addresses = "reg", + .match = of_bus_isa_match, + .count_cells = of_bus_isa_count_cells, + .map = of_bus_isa_map, + .translate = of_bus_isa_translate, + .get_flags = of_bus_isa_get_flags, + }, + /* Default */ + { + .name = "default", + .addresses = "reg", + .match = NULL, + .count_cells = of_bus_default_count_cells, + .map = of_bus_default_map, + .translate = of_bus_default_translate, + .get_flags = of_bus_default_get_flags, + }, +}; + +static struct of_bus *of_match_bus(struct device_node *np) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(of_busses); i ++) + if (!of_busses[i].match || of_busses[i].match(np)) + return &of_busses[i]; + BUG(); + return NULL; +} + +static int of_translate_one(struct device_node *parent, struct of_bus *bus, + struct of_bus *pbus, u32 *addr, + int na, int ns, int pna) +{ + const u32 *ranges; + unsigned int rlen; + int rone; + u64 offset = OF_BAD_ADDR; + + /* Normally, an absence of a "ranges" property means we are + * crossing a non-translatable boundary, and thus the addresses + * below the current not cannot be converted to CPU physical ones. + * Unfortunately, while this is very clear in the spec, it's not + * what Apple understood, and they do have things like /uni-n or + * /ht nodes with no "ranges" property and a lot of perfectly + * useable mapped devices below them. Thus we treat the absence of + * "ranges" as equivalent to an empty "ranges" property which means + * a 1:1 translation at that level. It's up to the caller not to try + * to translate addresses that aren't supposed to be translated in + * the first place. --BenH. + */ + ranges = of_get_property(parent, "ranges", (int *) &rlen); + if (ranges == NULL || rlen == 0) { + offset = of_read_number(addr, na); + memset(addr, 0, pna * 4); + pr_debug("OF: no ranges, 1:1 translation\n"); + goto finish; + } + + pr_debug("OF: walking ranges...\n"); + + /* Now walk through the ranges */ + rlen /= 4; + rone = na + pna + ns; + for (; rlen >= rone; rlen -= rone, ranges += rone) { + offset = bus->map(addr, ranges, na, ns, pna); + if (offset != OF_BAD_ADDR) + break; + } + if (offset == OF_BAD_ADDR) { + pr_debug("OF: not found !\n"); + return 1; + } + memcpy(addr, ranges + na, 4 * pna); + + finish: + of_dump_addr("OF: parent translation for:", addr, pna); + pr_debug("OF: with offset: "PRu64"\n", offset); + + /* Translate it into parent bus space */ + return pbus->translate(addr, offset, pna); +} + +/* + * Translate an address from the device-tree into a CPU physical address, + * this walks up the tree and applies the various bus mappings on the + * way. + * + * Note: We consider that crossing any level with #size-cells == 0 to mean + * that translation is impossible (that is we are not dealing with a value + * that can be mapped to a cpu physical address). This is not really specified + * that way, but this is traditionally the way IBM at least do things + */ +u64 of_translate_address(struct device_node *dev, const u32 *in_addr) +{ + struct device_node *parent = NULL; + struct of_bus *bus, *pbus; + u32 addr[OF_MAX_ADDR_CELLS]; + int na, ns, pna, pns; + u64 result = OF_BAD_ADDR; + + pr_debug("OF: ** translation for device %s **\n", dev->full_name); + + /* Increase refcount at current level */ + of_node_get(dev); + + /* Get parent & match bus type */ + parent = of_get_parent(dev); + if (parent == NULL) + goto bail; + bus = of_match_bus(parent); + + /* Cound address cells & copy address locally */ + bus->count_cells(dev, &na, &ns); + if (!OF_CHECK_COUNTS(na, ns)) { + printk(KERN_ERR "prom_parse: Bad cell count for %s\n", + dev->full_name); + goto bail; + } + memcpy(addr, in_addr, na * 4); + + pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n", + bus->name, na, ns, parent->full_name); + of_dump_addr("OF: translating address:", addr, na); + + /* Translate */ + for (;;) { + /* Switch to parent bus */ + of_node_put(dev); + dev = parent; + parent = of_get_parent(dev); + + /* If root, we have finished */ + if (parent == NULL) { + pr_debug("OF: reached root node\n"); + result = of_read_number(addr, na); + break; + } + + /* Get new parent bus and counts */ + pbus = of_match_bus(parent); + pbus->count_cells(dev, &pna, &pns); + if (!OF_CHECK_COUNTS(pna, pns)) { + printk(KERN_ERR "prom_parse: Bad cell count for %s\n", + dev->full_name); + break; + } + + pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n", + pbus->name, pna, pns, parent->full_name); + + /* Apply bus translation */ + if (of_translate_one(dev, bus, pbus, addr, na, ns, pna)) + break; + + /* Complete the move up one level */ + na = pna; + ns = pns; + bus = pbus; + + of_dump_addr("OF: one level translation:", addr, na); + } + bail: + of_node_put(parent); + of_node_put(dev); + + return result; +} +EXPORT_SYMBOL(of_translate_address); + +const u32 *of_get_address(struct device_node *dev, int index, u64 *size, + unsigned int *flags) +{ + const u32 *prop; + unsigned int psize; + struct device_node *parent; + struct of_bus *bus; + int onesize, i, na, ns; + + /* Get parent & match bus type */ + parent = of_get_parent(dev); + if (parent == NULL) + return NULL; + bus = of_match_bus(parent); + bus->count_cells(dev, &na, &ns); + of_node_put(parent); + if (!OF_CHECK_COUNTS(na, ns)) + return NULL; + + /* Get "reg" or "assigned-addresses" property */ + prop = of_get_property(dev, bus->addresses, (int *) &psize); + if (prop == NULL) + return NULL; + psize /= 4; + + onesize = na + ns; + for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) + if (i == index) { + if (size) + *size = of_read_number(prop + na, ns); + if (flags) + *flags = bus->get_flags(prop); + return prop; + } + return NULL; +} +EXPORT_SYMBOL(of_get_address); + +static int __of_address_to_resource(struct device_node *dev, const u32 *addrp, + u64 size, unsigned int flags, + struct resource *r) +{ + u64 taddr; + + if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) + return -EINVAL; + taddr = of_translate_address(dev, addrp); + if (taddr == OF_BAD_ADDR) + return -EINVAL; + memset(r, 0, sizeof(struct resource)); + if (flags & IORESOURCE_IO) { + unsigned long port; + port = -1; /* pci_address_to_pio(taddr); */ + if (port == (unsigned long)-1) + return -EINVAL; + r->start = port; + r->end = port + size - 1; + } else { + r->start = taddr; + r->end = taddr + size - 1; + } + r->flags = flags; + r->name = dev->name; + return 0; +} + +int of_address_to_resource(struct device_node *dev, int index, + struct resource *r) +{ + const u32 *addrp; + u64 size; + unsigned int flags; + + addrp = of_get_address(dev, index, &size, &flags); + if (addrp == NULL) + return -EINVAL; + return __of_address_to_resource(dev, addrp, size, flags, r); +} +EXPORT_SYMBOL_GPL(of_address_to_resource); + +void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, + unsigned long *busno, unsigned long *phys, unsigned long *size) +{ + const u32 *dma_window; + u32 cells; + const unsigned char *prop; + + dma_window = dma_window_prop; + + /* busno is always one cell */ + *busno = *(dma_window++); + + prop = of_get_property(dn, "ibm,#dma-address-cells", NULL); + if (!prop) + prop = of_get_property(dn, "#address-cells", NULL); + + cells = prop ? *(u32 *)prop : of_n_addr_cells(dn); + *phys = of_read_number(dma_window, cells); + + dma_window += cells; + + prop = of_get_property(dn, "ibm,#dma-size-cells", NULL); + cells = prop ? *(u32 *)prop : of_n_size_cells(dn); + *size = of_read_number(dma_window, cells); +} + +/* + * Interrupt remapper + */ + +static unsigned int of_irq_workarounds; +static struct device_node *of_irq_dflt_pic; + +static struct device_node *of_irq_find_parent(struct device_node *child) +{ + struct device_node *p; + const phandle *parp; + + if (!of_node_get(child)) + return NULL; + + do { + parp = of_get_property(child, "interrupt-parent", NULL); + if (parp == NULL) + p = of_get_parent(child); + else { + if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) + p = of_node_get(of_irq_dflt_pic); + else + p = of_find_node_by_phandle(*parp); + } + of_node_put(child); + child = p; + } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL); + + return p; +} + +/* This doesn't need to be called if you don't have any special workaround + * flags to pass + */ +void of_irq_map_init(unsigned int flags) +{ + of_irq_workarounds = flags; + + /* OldWorld, don't bother looking at other things */ + if (flags & OF_IMAP_OLDWORLD_MAC) + return; + + /* If we don't have phandles, let's try to locate a default interrupt + * controller (happens when booting with BootX). We do a first match + * here, hopefully, that only ever happens on machines with one + * controller. + */ + if (flags & OF_IMAP_NO_PHANDLE) { + struct device_node *np; + + for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) { + if (of_get_property(np, "interrupt-controller", NULL) + == NULL) + continue; + /* Skip /chosen/interrupt-controller */ + if (strcmp(np->name, "chosen") == 0) + continue; + /* It seems like at least one person on this planet + * wants to use BootX on a machine with an AppleKiwi + * controller which happens to pretend to be an + * interrupt controller too. + */ + if (strcmp(np->name, "AppleKiwi") == 0) + continue; + /* I think we found one ! */ + of_irq_dflt_pic = np; + break; + } + } + +} + +int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize, + const u32 *addr, struct of_irq *out_irq) +{ + struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL; + const u32 *tmp, *imap, *imask; + u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0; + int imaplen, match, i; + + pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...]," + "ointsize=%d\n", + parent->full_name, intspec[0], intspec[1], ointsize); + + ipar = of_node_get(parent); + + /* First get the #interrupt-cells property of the current cursor + * that tells us how to interpret the passed-in intspec. If there + * is none, we are nice and just walk up the tree + */ + do { + tmp = of_get_property(ipar, "#interrupt-cells", NULL); + if (tmp != NULL) { + intsize = *tmp; + break; + } + tnode = ipar; + ipar = of_irq_find_parent(ipar); + of_node_put(tnode); + } while (ipar); + if (ipar == NULL) { + pr_debug(" -> no parent found !\n"); + goto fail; + } + + pr_debug("of_irq_map_raw: ipar=%s, size=%d\n", + ipar->full_name, intsize); + + if (ointsize != intsize) + return -EINVAL; + + /* Look for this #address-cells. We have to implement the old linux + * trick of looking for the parent here as some device-trees rely on it + */ + old = of_node_get(ipar); + do { + tmp = of_get_property(old, "#address-cells", NULL); + tnode = of_get_parent(old); + of_node_put(old); + old = tnode; + } while (old && tmp == NULL); + of_node_put(old); + old = NULL; + addrsize = (tmp == NULL) ? 2 : *tmp; + + pr_debug(" -> addrsize=%d\n", addrsize); + + /* Now start the actual "proper" walk of the interrupt tree */ + while (ipar != NULL) { + /* Now check if cursor is an interrupt-controller and if it is + * then we are done + */ + if (of_get_property(ipar, "interrupt-controller", NULL) != + NULL) { + pr_debug(" -> got it !\n"); + memcpy(out_irq->specifier, intspec, + intsize * sizeof(u32)); + out_irq->size = intsize; + out_irq->controller = ipar; + of_node_put(old); + return 0; + } + + /* Now look for an interrupt-map */ + imap = of_get_property(ipar, "interrupt-map", &imaplen); + /* No interrupt map, check for an interrupt parent */ + if (imap == NULL) { + pr_debug(" -> no map, getting parent\n"); + newpar = of_irq_find_parent(ipar); + goto skiplevel; + } + imaplen /= sizeof(u32); + + /* Look for a mask */ + imask = of_get_property(ipar, "interrupt-map-mask", NULL); + + /* If we were passed no "reg" property and we attempt to parse + * an interrupt-map, then #address-cells must be 0. + * Fail if it's not. + */ + if (addr == NULL && addrsize != 0) { + pr_debug(" -> no reg passed in when needed !\n"); + goto fail; + } + + /* Parse interrupt-map */ + match = 0; + while (imaplen > (addrsize + intsize + 1) && !match) { + /* Compare specifiers */ + match = 1; + for (i = 0; i < addrsize && match; ++i) { + u32 mask = imask ? imask[i] : 0xffffffffu; + match = ((addr[i] ^ imap[i]) & mask) == 0; + } + for (; i < (addrsize + intsize) && match; ++i) { + u32 mask = imask ? imask[i] : 0xffffffffu; + match = + ((intspec[i-addrsize] ^ imap[i]) + & mask) == 0; + } + imap += addrsize + intsize; + imaplen -= addrsize + intsize; + + pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen); + + /* Get the interrupt parent */ + if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) + newpar = of_node_get(of_irq_dflt_pic); + else + newpar = + of_find_node_by_phandle((phandle)*imap); + imap++; + --imaplen; + + /* Check if not found */ + if (newpar == NULL) { + pr_debug(" -> imap parent not found !\n"); + goto fail; + } + + /* Get #interrupt-cells and #address-cells of new + * parent + */ + tmp = of_get_property(newpar, "#interrupt-cells", NULL); + if (tmp == NULL) { + pr_debug(" -> parent lacks " + "#interrupt-cells!\n"); + goto fail; + } + newintsize = *tmp; + tmp = of_get_property(newpar, "#address-cells", NULL); + newaddrsize = (tmp == NULL) ? 0 : *tmp; + + pr_debug(" -> newintsize=%d, newaddrsize=%d\n", + newintsize, newaddrsize); + + /* Check for malformed properties */ + if (imaplen < (newaddrsize + newintsize)) + goto fail; + + imap += newaddrsize + newintsize; + imaplen -= newaddrsize + newintsize; + + pr_debug(" -> imaplen=%d\n", imaplen); + } + if (!match) + goto fail; + + of_node_put(old); + old = of_node_get(newpar); + addrsize = newaddrsize; + intsize = newintsize; + intspec = imap - intsize; + addr = intspec - addrsize; + +skiplevel: + /* Iterate again with new parent */ + pr_debug(" -> new parent: %s\n", + newpar ? newpar->full_name : "<>"); + of_node_put(ipar); + ipar = newpar; + newpar = NULL; + } +fail: + of_node_put(ipar); + of_node_put(old); + of_node_put(newpar); + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(of_irq_map_raw); + +int of_irq_map_one(struct device_node *device, + int index, struct of_irq *out_irq) +{ + struct device_node *p; + const u32 *intspec, *tmp, *addr; + u32 intsize, intlen; + int res; + + pr_debug("of_irq_map_one: dev=%s, index=%d\n", + device->full_name, index); + + /* Get the interrupts property */ + intspec = of_get_property(device, "interrupts", (int *) &intlen); + if (intspec == NULL) + return -EINVAL; + intlen /= sizeof(u32); + + pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen); + + /* Get the reg property (if any) */ + addr = of_get_property(device, "reg", NULL); + + /* Look for the interrupt parent. */ + p = of_irq_find_parent(device); + if (p == NULL) + return -EINVAL; + + /* Get size of interrupt specifier */ + tmp = of_get_property(p, "#interrupt-cells", NULL); + if (tmp == NULL) { + of_node_put(p); + return -EINVAL; + } + intsize = *tmp; + + pr_debug(" intsize=%d intlen=%d\n", intsize, intlen); + + /* Check index */ + if ((index + 1) * intsize > intlen) + return -EINVAL; + + /* Get new specifier and map it */ + res = of_irq_map_raw(p, intspec + index * intsize, intsize, + addr, out_irq); + of_node_put(p); + return res; +} +EXPORT_SYMBOL_GPL(of_irq_map_one); + +/** + * Search the device tree for the best MAC address to use. 'mac-address' is + * checked first, because that is supposed to contain to "most recent" MAC + * address. If that isn't set, then 'local-mac-address' is checked next, + * because that is the default address. If that isn't set, then the obsolete + * 'address' is checked, just in case we're using an old device tree. + * + * Note that the 'address' property is supposed to contain a virtual address of + * the register set, but some DTS files have redefined that property to be the + * MAC address. + * + * All-zero MAC addresses are rejected, because those could be properties that + * exist in the device tree, but were not set by U-Boot. For example, the + * DTS could define 'mac-address' and 'local-mac-address', with zero MAC + * addresses. Some older U-Boots only initialized 'local-mac-address'. In + * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists + * but is all zeros. +*/ +const void *of_get_mac_address(struct device_node *np) +{ + struct property *pp; + + pp = of_find_property(np, "mac-address", NULL); + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value)) + return pp->value; + + pp = of_find_property(np, "local-mac-address", NULL); + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value)) + return pp->value; + + pp = of_find_property(np, "address", NULL); + if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value)) + return pp->value; + + return NULL; +} +EXPORT_SYMBOL(of_get_mac_address); + +int of_irq_to_resource(struct device_node *dev, int index, struct resource *r) +{ + struct of_irq out_irq; + int irq; + int res; + + res = of_irq_map_one(dev, index, &out_irq); + + /* Get irq for the device */ + if (res) { + pr_debug("IRQ not found... code = %d", res); + return NO_IRQ; + } + /* Assuming single interrupt controller... */ + irq = out_irq.specifier[0]; + + pr_debug("IRQ found = %d", irq); + + /* Only dereference the resource if both the + * resource and the irq are valid. */ + if (r && irq != NO_IRQ) { + r->start = r->end = irq; + r->flags = IORESOURCE_IRQ; + } + + return irq; +} +EXPORT_SYMBOL_GPL(of_irq_to_resource); + +void __iomem *of_iomap(struct device_node *np, int index) +{ + struct resource res; + + if (of_address_to_resource(np, index, &res)) + return NULL; + + return ioremap(res.start, 1 + res.end - res.start); +} +EXPORT_SYMBOL(of_iomap); diff --git a/include/asm-microblaze/of_device.h b/include/asm-microblaze/of_device.h new file mode 100644 index 0000000..6df76b9 --- /dev/null +++ b/include/asm-microblaze/of_device.h @@ -0,0 +1,37 @@ +/* + * include/asm-microblaze/of_device.h + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + */ + +#ifndef _ASM_OF_DEVICE_H +#define _ASM_OF_DEVICE_H +#ifdef __KERNEL__ + +#include <linux/device.h> +#include <linux/of.h> + +/* + * The of_device is a kind of "base class" that is a superset of + * struct device for use by devices attached to an OF node and + * probed using OF properties. + */ +struct of_device { + struct device_node *node; /* to be obsoleted */ + u64 dma_mask; /* DMA mask */ + struct device dev; /* Generic device interface */ +}; + +extern ssize_t of_device_get_modalias(struct of_device *ofdev, + char *str, ssize_t len); +extern int of_device_uevent(struct device *dev, + struct kobj_uevent_env *env); + +/* This is just here during the transition */ +#include <linux/of_device.h> + +#endif /* __KERNEL__ */ +#endif /* _ASM_OF_DEVICE_H */ diff --git a/include/asm-microblaze/of_platform.h b/include/asm-microblaze/of_platform.h new file mode 100644 index 0000000..aed450f --- /dev/null +++ b/include/asm-microblaze/of_platform.h @@ -0,0 +1,37 @@ +/* + * include/asm-microblaze/of_platform.h + * + * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. + * <benh@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ + +#ifndef _ASM_OF_PLATFORM_H +#define _ASM_OF_PLATFORM_H + +/* This is just here during the transition */ +#include <linux/of_platform.h> + +/* Platform drivers register/unregister */ +extern int of_register_platform_driver(struct of_platform_driver *drv); +extern void of_unregister_platform_driver(struct of_platform_driver *drv); + +/* Platform devices and busses creation */ +extern struct of_device *of_platform_device_create(struct device_node *np, + const char *bus_id, + struct device *parent); +/* pseudo "matches" value to not do deep probe */ +#define OF_NO_DEEP_PROBE ((struct of_device_id *)-1) + +extern int of_platform_bus_probe(struct device_node *root, + struct of_device_id *matches, + struct device *parent); + +extern struct of_device *of_find_device_by_phandle(phandle ph); + +#endif /* _ASM_OF_PLATFORM_H */ diff --git a/include/asm-microblaze/prom.h b/include/asm-microblaze/prom.h new file mode 100644 index 0000000..ed500ba --- /dev/null +++ b/include/asm-microblaze/prom.h @@ -0,0 +1,333 @@ +/* + * include/asm-microblaze/prom.h + * + * Definitions for talking to the Open Firmware PROM on + * Power Macintosh computers. + * + * Copyright (C) 1996-2005 Paul Mackerras. + * + * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _ASM_PROM_H +#define _ASM_PROM_H +#ifdef __KERNEL__ + +#include <linux/types.h> +#include <linux/proc_fs.h> +#include <linux/platform_device.h> +#include <asm/irq.h> +#include <asm/atomic.h> + +#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 +#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 + +#define of_compat_cmp(s1, s2, l) strncasecmp((s1), (s2), (l)) +#define of_prop_cmp(s1, s2) strcmp((s1), (s2)) +#define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) + +/* Definitions used by the flattened device tree */ +#define OF_DT_HEADER 0xd00dfeed /* marker */ +#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */ +#define OF_DT_END_NODE 0x2 /* End node */ +#define OF_DT_PROP 0x3 /* Property: name off, size, content */ +#define OF_DT_NOP 0x4 /* nop */ +#define OF_DT_END 0x9 + +#define OF_DT_VERSION 0x10 + +/* + * This is what gets passed to the kernel by prom_init or kexec + * + * The dt struct contains the device tree structure, full pathes and + * property contents. The dt strings contain a separate block with just + * the strings for the property names, and is fully page aligned and + * self contained in a page, so that it can be kept around by the kernel, + * each property name appears only once in this page (cheap compression) + * + * the mem_rsvmap contains a map of reserved ranges of physical memory, + * passing it here instead of in the device-tree itself greatly simplifies + * the job of everybody. It's just a list of u64 pairs (base/size) that + * ends when size is 0 + */ +struct boot_param_header { + u32 magic; /* magic word OF_DT_HEADER */ + u32 totalsize; /* total size of DT block */ + u32 off_dt_struct; /* offset to structure */ + u32 off_dt_strings; /* offset to strings */ + u32 off_mem_rsvmap; /* offset to memory reserve map */ + u32 version; /* format version */ + u32 last_comp_version; /* last compatible version */ + /* version 2 fields below */ + u32 boot_cpuid_phys; /* Physical CPU id we're booting on */ + /* version 3 fields below */ + u32 dt_strings_size; /* size of the DT strings block */ + /* version 17 fields below */ + u32 dt_struct_size; /* size of the DT structure block */ +}; + +typedef u32 phandle; +typedef u32 ihandle; + +struct property { + char *name; + int length; + void *value; + struct property *next; +}; + +struct device_node { + const char *name; + const char *type; + phandle node; + phandle linux_phandle; + char *full_name; + + struct property *properties; + struct property *deadprops; /* removed properties */ + struct device_node *parent; + struct device_node *child; + struct device_node *sibling; + struct device_node *next; /* next device of same type */ + struct device_node *allnext; /* next in list of all nodes */ + struct proc_dir_entry *pde; /* this node's proc directory */ + struct kref kref; + unsigned long _flags; + void *data; +}; + +extern struct device_node *of_chosen; + +static inline int of_node_check_flag(struct device_node *n, unsigned long flag) +{ + return test_bit(flag, &n->_flags); +} + +static inline void of_node_set_flag(struct device_node *n, unsigned long flag) +{ + set_bit(flag, &n->_flags); +} + +#define HAVE_ARCH_DEVTREE_FIXUPS + +static inline void set_node_proc_entry(struct device_node *dn, + struct proc_dir_entry *de) +{ + dn->pde = de; +} + +extern struct device_node *of_find_all_nodes(struct device_node *prev); +extern struct device_node *of_node_get(struct device_node *node); +extern void of_node_put(struct device_node *node); + +/* For scanning the flat device-tree at boot time */ +extern int __init of_scan_flat_dt(int (*it)(unsigned long node, + const char *uname, int depth, + void *data), + void *data); +extern void *__init of_get_flat_dt_prop(unsigned long node, const char *name, + unsigned long *size); +extern int __init + of_flat_dt_is_compatible(unsigned long node, const char *name); +extern unsigned long __init of_get_flat_dt_root(void); + +/* For updating the device tree at runtime */ +extern void of_attach_node(struct device_node *); +extern void of_detach_node(struct device_node *); + +/* Other Prototypes */ +extern void finish_device_tree(void); +extern void unflatten_device_tree(void); +extern void early_init_devtree(void *); +#define device_is_compatible(d, c) of_device_is_compatible((d), (c)) +extern int machine_is_compatible(const char *compat); +extern void print_properties(struct device_node *node); +extern int prom_n_intr_cells(struct device_node *np); +extern void prom_get_irq_senses(unsigned char *senses, int off, int max); +extern int prom_add_property(struct device_node *np, struct property *prop); +extern int prom_remove_property(struct device_node *np, struct property *prop); +extern int prom_update_property(struct device_node *np, + struct property *newprop, + struct property *oldprop); + +#ifdef CONFIG_PPC32 +/* + * PCI <-> OF matching functions + * (XXX should these be here?) + */ +struct pci_bus; +struct pci_dev; +extern int pci_device_from_OF_node(struct device_node *node, + u8 *bus, u8 *devfn); +extern struct device_node *pci_busdev_to_OF_node(struct pci_bus *, int); +extern struct device_node *pci_device_to_OF_node(struct pci_dev *); +extern void pci_create_OF_bus_map(void); +#endif + +extern struct resource *request_OF_resource(struct device_node *node, + int index, const char *name_postfix); +extern int release_OF_resource(struct device_node *node, int index); + +/* + * OF address retreival & translation + */ + +/* Helper to read a big number; size is in cells (not bytes) */ +static inline u64 of_read_number(const u32 *cell, int size) +{ + u64 r = 0; + while (size--) + r = (r << 32) | *(cell++); + return r; +} + +/* Like of_read_number, but we want an unsigned long result */ +#ifdef CONFIG_PPC32 +static inline unsigned long of_read_ulong(const u32 *cell, int size) +{ + return cell[size-1]; +} +#else +#define of_read_ulong(cell, size) of_read_number(cell, size) +#endif + +/* Translate an OF address block into a CPU physical address + */ +extern u64 of_translate_address(struct device_node *np, const u32 *addr); + +/* Extract an address from a device, returns the region size and + * the address space flags too. The PCI version uses a BAR number + * instead of an absolute index + */ +extern const u32 *of_get_address(struct device_node *dev, int index, + u64 *size, unsigned int *flags); +extern const u32 *of_get_pci_address(struct device_node *dev, int bar_no, + u64 *size, unsigned int *flags); + +/* Get an address as a resource. Note that if your address is + * a PIO address, the conversion will fail if the physical address + * can't be internally converted to an IO token with + * pci_address_to_pio(), that is because it's either called to early + * or it can't be matched to any host bridge IO space + */ +extern int of_address_to_resource(struct device_node *dev, int index, + struct resource *r); +extern int of_pci_address_to_resource(struct device_node *dev, int bar, + struct resource *r); + +/* Parse the ibm,dma-window property of an OF node into the busno, phys and + * size parameters. + */ +void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, + unsigned long *busno, unsigned long *phys, unsigned long *size); + +extern void kdump_move_device_tree(void); + +/* CPU OF node matching */ +struct device_node *of_get_cpu_node(int cpu, unsigned int *thread); + +/* Get the MAC address */ +extern const void *of_get_mac_address(struct device_node *np); + +/* + * OF interrupt mapping + */ + +/* This structure is returned when an interrupt is mapped. The controller + * field needs to be put() after use + */ + +#define OF_MAX_IRQ_SPEC 4 /* We handle specifiers of at most 4 cells */ + +struct of_irq { + struct device_node *controller; /* Interrupt controller node */ + u32 size; /* Specifier size */ + u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */ +}; + +/** + * of_irq_map_init - Initialize the irq remapper + * @flags: flags defining workarounds to enable + * + * Some machines have bugs in the device-tree which require certain workarounds + * to be applied. Call this before any interrupt mapping attempts to enable + * those workarounds. + */ +#define OF_IMAP_OLDWORLD_MAC 0x00000001 +#define OF_IMAP_NO_PHANDLE 0x00000002 + +extern void of_irq_map_init(unsigned int flags); + +/** + * of_irq_map_raw - Low level interrupt tree parsing + * @parent: the device interrupt parent + * @intspec: interrupt specifier ("interrupts" property of the device) + * @ointsize: size of the passed in interrupt specifier + * @addr: address specifier (start of "reg" property of the device) + * @out_irq: structure of_irq filled by this function + * + * Returns 0 on success and a negative number on error + * + * This function is a low-level interrupt tree walking function. It + * can be used to do a partial walk with synthetized reg and interrupts + * properties, for example when resolving PCI interrupts when no device + * node exist for the parent. + * + */ + +extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec, + u32 ointsize, const u32 *addr, + struct of_irq *out_irq); + +/** + * of_irq_map_one - Resolve an interrupt for a device + * @device: the device whose interrupt is to be resolved + * @index: index of the interrupt to resolve + * @out_irq: structure of_irq filled by this function + * + * This function resolves an interrupt, walking the tree, for a given + * device-tree node. It's the high level pendant to of_irq_map_raw(). + * It also implements the workarounds for OldWolrd Macs. + */ +extern int of_irq_map_one(struct device_node *device, int index, + struct of_irq *out_irq); + +/** + * of_irq_map_pci - Resolve the interrupt for a PCI device + * @pdev: the device whose interrupt is to be resolved + * @out_irq: structure of_irq filled by this function + * + * This function resolves the PCI interrupt for a given PCI device. If a + * device-node exists for a given pci_dev, it will use normal OF tree + * walking. If not, it will implement standard swizzling and walk up the + * PCI tree until an device-node is found, at which point it will finish + * resolving using the OF tree walking. + */ +struct pci_dev; +extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq); + +extern int of_irq_to_resource(struct device_node *dev, int index, + struct resource *r); + +/** + * of_iomap - Maps the memory mapped IO for a given device_node + * @device: the device whose io range will be mapped + * @index: index of the io range + * + * Returns a pointer to the mapped memory + */ +extern void __iomem *of_iomap(struct device_node *device, int index); + +/* + * NB: This is here while we transition from using asm/prom.h + * to linux/of.h + */ +#include <linux/of.h> + +#endif /* __KERNEL__ */ +#endif /* _ASM_PROM_H */ -- 1.5.4.rc4.14.g6fc74
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