projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 1da177e4 LT |
2 | * Machine specific APM BIOS functions for generic. |
| 3 | * Split out from apm.c by Osamu Tomita <tomita@cinet.co.jp> | |
| 4 | */ | |
| 5 | ||
| 05e4d316 PA |
6 | #ifndef _ASM_X86_MACH_DEFAULT_APM_H |
| 7 | #define _ASM_X86_MACH_DEFAULT_APM_H | |
| 1da177e4 LT |
8 | |
| 9 | #ifdef APM_ZERO_SEGS | |
| 10 | # define APM_DO_ZERO_SEGS \ | |
| 11 | "pushl %%ds\n\t" \ | |
| 12 | "pushl %%es\n\t" \ | |
| 13 | "xorl %%edx, %%edx\n\t" \ | |
| 14 | "mov %%dx, %%ds\n\t" \ | |
| 15 | "mov %%dx, %%es\n\t" \ | |
| 16 | "mov %%dx, %%fs\n\t" \ | |
| 17 | "mov %%dx, %%gs\n\t" | |
| 18 | # define APM_DO_POP_SEGS \ | |
| 19 | "popl %%es\n\t" \ | |
| 20 | "popl %%ds\n\t" | |
| 21 | #else | |
| 22 | # define APM_DO_ZERO_SEGS | |
| 23 | # define APM_DO_POP_SEGS | |
| 24 | #endif | |
| 25 | ||
| 26 | static inline void apm_bios_call_asm(u32 func, u32 ebx_in, u32 ecx_in, | |
| 27 | u32 *eax, u32 *ebx, u32 *ecx, | |
| 28 | u32 *edx, u32 *esi) | |
| 29 | { | |
| 30 | /* | |
| 31 | * N.B. We do NOT need a cld after the BIOS call | |
| 32 | * because we always save and restore the flags. | |
| 33 | */ | |
| 34 | __asm__ __volatile__(APM_DO_ZERO_SEGS | |
| 35 | "pushl %%edi\n\t" | |
| 36 | "pushl %%ebp\n\t" | |
| 37 | "lcall *%%cs:apm_bios_entry\n\t" | |
| 38 | "setc %%al\n\t" | |
| 39 | "popl %%ebp\n\t" | |
| 40 | "popl %%edi\n\t" | |
| 41 | APM_DO_POP_SEGS | |
| 42 | : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx), | |
| 43 | "=S" (*esi) | |
| 44 | : "a" (func), "b" (ebx_in), "c" (ecx_in) | |
| 45 | : "memory", "cc"); | |
| 46 | } | |
| 47 | ||
| 117780ee PA |
48 | static inline bool apm_bios_call_simple_asm(u32 func, u32 ebx_in, |
| 49 | u32 ecx_in, u32 *eax) | |
| 1da177e4 LT |
50 | { |
| 51 | int cx, dx, si; | |
| 117780ee | 52 | bool error; |
| 1da177e4 LT |
53 | |
| 54 | /* | |
| 55 | * N.B. We do NOT need a cld after the BIOS call | |
| 56 | * because we always save and restore the flags. | |
| 57 | */ | |
| 58 | __asm__ __volatile__(APM_DO_ZERO_SEGS | |
| 59 | "pushl %%edi\n\t" | |
| 60 | "pushl %%ebp\n\t" | |
| 61 | "lcall *%%cs:apm_bios_entry\n\t" | |
| 62 | "setc %%bl\n\t" | |
| 63 | "popl %%ebp\n\t" | |
| 64 | "popl %%edi\n\t" | |
| 65 | APM_DO_POP_SEGS | |
| 66 | : "=a" (*eax), "=b" (error), "=c" (cx), "=d" (dx), | |
| 67 | "=S" (si) | |
| 68 | : "a" (func), "b" (ebx_in), "c" (ecx_in) | |
| 69 | : "memory", "cc"); | |
| 70 | return error; | |
| 71 | } | |
| 72 | ||
| 05e4d316 | 73 | #endif /* _ASM_X86_MACH_DEFAULT_APM_H */ |