^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Machine specific APM BIOS functions for generic.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Split out from apm.c by Osamu Tomita <tomita@cinet.co.jp>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #ifndef _ASM_X86_MACH_DEFAULT_APM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define _ASM_X86_MACH_DEFAULT_APM_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifdef APM_ZERO_SEGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) # define APM_DO_ZERO_SEGS \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) "pushl %%ds\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) "pushl %%es\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) "xorl %%edx, %%edx\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) "mov %%dx, %%ds\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) "mov %%dx, %%es\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) "mov %%dx, %%fs\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) "mov %%dx, %%gs\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) # define APM_DO_POP_SEGS \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) "popl %%es\n\t" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) "popl %%ds\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) # define APM_DO_ZERO_SEGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) # define APM_DO_POP_SEGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static inline void apm_bios_call_asm(u32 func, u32 ebx_in, u32 ecx_in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) u32 *eax, u32 *ebx, u32 *ecx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) u32 *edx, u32 *esi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * N.B. We do NOT need a cld after the BIOS call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * because we always save and restore the flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) __asm__ __volatile__(APM_DO_ZERO_SEGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) "pushl %%edi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) "pushl %%ebp\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) "lcall *%%cs:apm_bios_entry\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) "setc %%al\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) "popl %%ebp\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) "popl %%edi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) APM_DO_POP_SEGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) "=S" (*esi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) : "a" (func), "b" (ebx_in), "c" (ecx_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) : "memory", "cc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static inline bool apm_bios_call_simple_asm(u32 func, u32 ebx_in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) u32 ecx_in, u32 *eax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int cx, dx, si;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) bool error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * N.B. We do NOT need a cld after the BIOS call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * because we always save and restore the flags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) __asm__ __volatile__(APM_DO_ZERO_SEGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) "pushl %%edi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) "pushl %%ebp\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) "lcall *%%cs:apm_bios_entry\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) "setc %%bl\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) "popl %%ebp\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) "popl %%edi\n\t"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) APM_DO_POP_SEGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) : "=a" (*eax), "=b" (error), "=c" (cx), "=d" (dx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) "=S" (si)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) : "a" (func), "b" (ebx_in), "c" (ecx_in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) : "memory", "cc");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #endif /* _ASM_X86_MACH_DEFAULT_APM_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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