1/* 2 * include/asm-i386/mach-default/apm.h 3 * 4 * Machine specific APM BIOS functions for generic. 5 * Split out from apm.c by Osamu Tomita <tomita@cinet.co.jp> 6 */ 7 8#ifndef _ASM_APM_H 9#define _ASM_APM_H 10 11#ifdef APM_ZERO_SEGS 12# define APM_DO_ZERO_SEGS \ 13 "pushl %%ds\n\t" \ 14 "pushl %%es\n\t" \ 15 "xorl %%edx, %%edx\n\t" \ 16 "mov %%dx, %%ds\n\t" \ 17 "mov %%dx, %%es\n\t" \ 18 "mov %%dx, %%fs\n\t" \ 19 "mov %%dx, %%gs\n\t" 20# define APM_DO_POP_SEGS \ 21 "popl %%es\n\t" \ 22 "popl %%ds\n\t" 23#else 24# define APM_DO_ZERO_SEGS 25# define APM_DO_POP_SEGS 26#endif 27 28static inline void apm_bios_call_asm(u32 func, u32 ebx_in, u32 ecx_in, 29 u32 *eax, u32 *ebx, u32 *ecx, 30 u32 *edx, u32 *esi) 31{ 32 /* 33 * N.B. We do NOT need a cld after the BIOS call 34 * because we always save and restore the flags. 35 */ 36 __asm__ __volatile__(APM_DO_ZERO_SEGS 37 "pushl %%edi\n\t" 38 "pushl %%ebp\n\t" 39 "lcall *%%cs:apm_bios_entry\n\t" 40 "setc %%al\n\t" 41 "popl %%ebp\n\t" 42 "popl %%edi\n\t" 43 APM_DO_POP_SEGS 44 : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx), 45 "=S" (*esi) 46 : "a" (func), "b" (ebx_in), "c" (ecx_in) 47 : "memory", "cc"); 48} 49 50static inline u8 apm_bios_call_simple_asm(u32 func, u32 ebx_in, 51 u32 ecx_in, u32 *eax) 52{ 53 int cx, dx, si; 54 u8 error; 55 56 /* 57 * N.B. We do NOT need a cld after the BIOS call 58 * because we always save and restore the flags. 59 */ 60 __asm__ __volatile__(APM_DO_ZERO_SEGS 61 "pushl %%edi\n\t" 62 "pushl %%ebp\n\t" 63 "lcall *%%cs:apm_bios_entry\n\t" 64 "setc %%bl\n\t" 65 "popl %%ebp\n\t" 66 "popl %%edi\n\t" 67 APM_DO_POP_SEGS 68 : "=a" (*eax), "=b" (error), "=c" (cx), "=d" (dx), 69 "=S" (si) 70 : "a" (func), "b" (ebx_in), "c" (ecx_in) 71 : "memory", "cc"); 72 return error; 73} 74 75#endif /* _ASM_APM_H */ 76