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    Subject[PATCH 2.5.66-ac1] Rest of PC-9800 support (3/9) core
    This is the patch to support NEC PC-9800 subarchitecture
    against 2.5.66-ac1. (3/9)

    Small patches for PC98 core support.
    io.h: Using ioport 0x5f to wait is recomended by vendor.
    irq.h: Cascade IRQ is 7 for PC98 not 2.
    pc9800.h: Add macros to access BIOS parameters.

    Regards,
    Osamu Tomita

    diff -Nru linux/include/asm-i386/io.h linux98/include/asm-i386/io.h
    --- linux/include/asm-i386/io.h 2002-10-12 13:22:45.000000000 +0900
    +++ linux98/include/asm-i386/io.h 2002-10-12 19:25:19.000000000 +0900
    @@ -27,6 +27,8 @@
    * Linus
    */

    +#include <linux/config.h>
    +
    /*
    * Bit simplified and optimized by Jan Hubicka
    * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999.
    @@ -288,7 +290,11 @@
    #ifdef SLOW_IO_BY_JUMPING
    #define __SLOW_DOWN_IO "jmp 1f; 1: jmp 1f; 1:"
    #else
    +#ifdef CONFIG_X86_PC9800
    +#define __SLOW_DOWN_IO "outb %%al,$0x5f;"
    +#else
    #define __SLOW_DOWN_IO "outb %%al,$0x80;"
    +#endif
    #endif

    static inline void slow_down_io(void) {
    diff -Nru linux/include/asm-i386/irq.h linux98/include/asm-i386/irq.h
    --- linux/include/asm-i386/irq.h 2002-09-21 00:20:16.000000000 +0900
    +++ linux98/include/asm-i386/irq.h 2002-09-21 07:17:56.000000000 +0900
    @@ -17,7 +17,11 @@

    static __inline__ int irq_cannonicalize(int irq)
    {
    +#ifdef CONFIG_X86_PC9800
    + return ((irq == 7) ? 11 : irq);
    +#else
    return ((irq == 2) ? 9 : irq);
    +#endif
    }

    extern void disable_irq(unsigned int);
    diff -Nru linux/include/asm-i386/pc9800.h linux98/include/asm-i386/pc9800.h
    --- linux/include/asm-i386/pc9800.h 1970-01-01 09:00:00.000000000 +0900
    +++ linux98/include/asm-i386/pc9800.h 2002-08-17 21:50:18.000000000 +0900
    @@ -0,0 +1,27 @@
    +/*
    + * PC-9800 machine types.
    + *
    + * Copyright (C) 1999 TAKAI Kosuke <tak@kmc.kyoto-u.ac.jp>
    + * (Linux/98 Project)
    + */
    +
    +#ifndef _ASM_PC9800_H_
    +#define _ASM_PC9800_H_
    +
    +#include <asm/pc9800_sca.h>
    +#include <asm/types.h>
    +
    +#define __PC9800SCA(type, pa) (*(type *) phys_to_virt(pa))
    +#define __PC9800SCA_TEST_BIT(pa, n) \
    + ((__PC9800SCA(u8, pa) & (1U << (n))) != 0)
    +
    +#define PC9800_HIGHRESO_P() __PC9800SCA_TEST_BIT(PC9800SCA_BIOS_FLAG, 3)
    +#define PC9800_8MHz_P() __PC9800SCA_TEST_BIT(PC9800SCA_BIOS_FLAG, 7)
    +
    + /* 0x2198 is 98 21 on memory... */
    +#define PC9800_9821_P() (__PC9800SCA(u16, PC9821SCA_ROM_ID) == 0x2198)
    +
    +/* Note PC9821_...() are valid only when PC9800_9821_P() was true. */
    +#define PC9821_IDEIF_DOUBLE_P() __PC9800SCA_TEST_BIT(PC9821SCA_ROM_FLAG4, 4)
    +
    +#endif
    -
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