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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 424 | giacomo | 1 | /* |
| 2 | * include/asm-i386/mach-pc9800/apm.h |
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| 3 | * |
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| 4 | * Machine specific APM BIOS functions for NEC PC9800. |
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| 5 | * Split out from apm.c by Osamu Tomita <tomita@cinet.co.jp> |
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| 6 | */ |
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| 7 | |||
| 8 | #ifndef _ASM_APM_H |
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| 9 | #define _ASM_APM_H |
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| 10 | |||
| 11 | #include <linux/apm_bios.h> |
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| 12 | |||
| 13 | #ifdef APM_ZERO_SEGS |
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| 14 | # define APM_DO_ZERO_SEGS \ |
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| 15 | "pushl %%ds\n\t" \ |
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| 16 | "pushl %%es\n\t" \ |
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| 17 | "xorl %%edx, %%edx\n\t" \ |
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| 18 | "mov %%dx, %%ds\n\t" \ |
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| 19 | "mov %%dx, %%es\n\t" \ |
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| 20 | "mov %%dx, %%fs\n\t" \ |
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| 21 | "mov %%dx, %%gs\n\t" |
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| 22 | # define APM_DO_POP_SEGS \ |
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| 23 | "popl %%es\n\t" \ |
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| 24 | "popl %%ds\n\t" |
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| 25 | #else |
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| 26 | # define APM_DO_ZERO_SEGS |
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| 27 | # define APM_DO_POP_SEGS |
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| 28 | #endif |
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| 29 | |||
| 30 | static inline void apm_bios_call_asm(u32 func, u32 ebx_in, u32 ecx_in, |
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| 31 | u32 *eax, u32 *ebx, u32 *ecx, |
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| 32 | u32 *edx, u32 *esi) |
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| 33 | { |
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| 34 | /* |
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| 35 | * N.B. We do NOT need a cld after the BIOS call |
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| 36 | * because we always save and restore the flags. |
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| 37 | */ |
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| 38 | __asm__ __volatile__(APM_DO_ZERO_SEGS |
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| 39 | "pushl %%edi\n\t" |
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| 40 | "pushl %%ebp\n\t" |
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| 41 | "pushfl\n\t" |
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| 42 | "lcall *%%cs:apm_bios_entry\n\t" |
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| 43 | "setc %%al\n\t" |
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| 44 | "popl %%ebp\n\t" |
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| 45 | "popl %%edi\n\t" |
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| 46 | APM_DO_POP_SEGS |
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| 47 | : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx), |
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| 48 | "=S" (*esi) |
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| 49 | : "a" (func), "b" (ebx_in), "c" (ecx_in) |
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| 50 | : "memory", "cc"); |
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| 51 | } |
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| 52 | |||
| 53 | static inline u8 apm_bios_call_simple_asm(u32 func, u32 ebx_in, |
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| 54 | u32 ecx_in, u32 *eax) |
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| 55 | { |
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| 56 | int cx, dx, si; |
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| 57 | u8 error; |
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| 58 | |||
| 59 | /* |
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| 60 | * N.B. We do NOT need a cld after the BIOS call |
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| 61 | * because we always save and restore the flags. |
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| 62 | */ |
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| 63 | __asm__ __volatile__(APM_DO_ZERO_SEGS |
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| 64 | "pushl %%edi\n\t" |
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| 65 | "pushl %%ebp\n\t" |
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| 66 | "pushfl\n\t" |
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| 67 | "lcall *%%cs:apm_bios_entry\n\t" |
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| 68 | "setc %%bl\n\t" |
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| 69 | "popl %%ebp\n\t" |
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| 70 | "popl %%edi\n\t" |
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| 71 | APM_DO_POP_SEGS |
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| 72 | : "=a" (*eax), "=b" (error), "=c" (cx), "=d" (dx), |
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| 73 | "=S" (si) |
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| 74 | : "a" (func), "b" (ebx_in), "c" (ecx_in) |
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| 75 | : "memory", "cc"); |
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| 76 | if (func == APM_FUNC_VERSION) |
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| 77 | *eax = (*eax & 0xff00) | ((*eax & 0x00f0) >> 4); |
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| 78 | |||
| 79 | return error; |
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| 80 | } |
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| 81 | |||
| 82 | #endif /* _ASM_APM_H */ |