Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Mon, 22 Aug 2011 16:47:40 -0700 | From | Andres Salomon <> | Subject | [PATCH] ARM: mmp: map sram as MT_MEMORY rather than MT_DEVICE |
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The sram code allocates memory with ioremap, which assumes MT_DEVICE for memory protections. This explodes when we map sram for power management purposes and then attempt to execute it (jump_to_lp_sram) on the OLPC XO-1.75. Instead, we want to specify MT_MEMORY, which doesn't set the L_PTE_XN bit.
Signed-off-by: Andres Salomon <dilinger@queued.net> --- arch/arm/mach-mmp/sram.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
Eric, this patch is against the devel branch of your pxa tree.
diff --git a/arch/arm/mach-mmp/sram.c b/arch/arm/mach-mmp/sram.c index 4304f95..ca4d3c1 100644 --- a/arch/arm/mach-mmp/sram.c +++ b/arch/arm/mach-mmp/sram.c @@ -21,6 +21,7 @@ #include <linux/err.h> #include <linux/slab.h> #include <linux/genalloc.h> +#include <asm/mach/map.h> #include <mach/sram.h> @@ -87,7 +88,8 @@ static int __devinit sram_probe(struct platform_device *pdev) info->sram_phys = (phys_addr_t)res->start; info->sram_size = resource_size(res); - info->sram_virt = ioremap(info->sram_phys, info->sram_size); + info->sram_virt = __arm_ioremap(info->sram_phys, info->sram_size, + MT_MEMORY); info->pool_name = kstrdup(pdata->pool_name, GFP_KERNEL); info->granularity = pdata->granularity; -- 1.7.2.5
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