| /* |
| * Machine specific APM BIOS functions for generic. |
| * Split out from apm.c by Osamu Tomita <tomita@cinet.co.jp> |
| */ |
| |
| #ifndef _ASM_X86_MACH_DEFAULT__APM_H |
| #define _ASM_X86_MACH_DEFAULT__APM_H |
| |
| #ifdef APM_ZERO_SEGS |
| # define APM_DO_ZERO_SEGS \ |
| "pushl %%ds\n\t" \ |
| "pushl %%es\n\t" \ |
| "xorl %%edx, %%edx\n\t" \ |
| "mov %%dx, %%ds\n\t" \ |
| "mov %%dx, %%es\n\t" \ |
| "mov %%dx, %%fs\n\t" \ |
| "mov %%dx, %%gs\n\t" |
| # define APM_DO_POP_SEGS \ |
| "popl %%es\n\t" \ |
| "popl %%ds\n\t" |
| #else |
| # define APM_DO_ZERO_SEGS |
| # define APM_DO_POP_SEGS |
| #endif |
| |
| static inline void apm_bios_call_asm(u32 func, u32 ebx_in, u32 ecx_in, |
| u32 *eax, u32 *ebx, u32 *ecx, |
| u32 *edx, u32 *esi) |
| { |
| /* |
| * N.B. We do NOT need a cld after the BIOS call |
| * because we always save and restore the flags. |
| */ |
| __asm__ __volatile__(APM_DO_ZERO_SEGS |
| "pushl %%edi\n\t" |
| "pushl %%ebp\n\t" |
| "lcall *%%cs:apm_bios_entry\n\t" |
| "setc %%al\n\t" |
| "popl %%ebp\n\t" |
| "popl %%edi\n\t" |
| APM_DO_POP_SEGS |
| : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx), |
| "=S" (*esi) |
| : "a" (func), "b" (ebx_in), "c" (ecx_in) |
| : "memory", "cc"); |
| } |
| |
| static inline u8 apm_bios_call_simple_asm(u32 func, u32 ebx_in, |
| u32 ecx_in, u32 *eax) |
| { |
| int cx, dx, si; |
| u8 error; |
| |
| /* |
| * N.B. We do NOT need a cld after the BIOS call |
| * because we always save and restore the flags. |
| */ |
| __asm__ __volatile__(APM_DO_ZERO_SEGS |
| "pushl %%edi\n\t" |
| "pushl %%ebp\n\t" |
| "lcall *%%cs:apm_bios_entry\n\t" |
| "setc %%bl\n\t" |
| "popl %%ebp\n\t" |
| "popl %%edi\n\t" |
| APM_DO_POP_SEGS |
| : "=a" (*eax), "=b" (error), "=c" (cx), "=d" (dx), |
| "=S" (si) |
| : "a" (func), "b" (ebx_in), "c" (ecx_in) |
| : "memory", "cc"); |
| return error; |
| } |
| |
| #endif /* _ASM_X86_MACH_DEFAULT__APM_H */ |
