| Greg Hartman | 76d05dc | 2016-11-23 15:51:27 -0800 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------- * |
| 2 | * |
| 3 | * Copyright 2013 Sebastian Herbszt - All Rights Reserved |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| 8 | * Boston MA 02110-1301, USA; either version 2 of the License, or |
| 9 | * (at your option) any later version; incorporated herein by reference. |
| 10 | * |
| 11 | * ----------------------------------------------------------------------- */ |
| 12 | |
| 13 | /* |
| 14 | * poweroff.c |
| 15 | * |
| 16 | * APM poweroff module |
| 17 | */ |
| 18 | |
| 19 | #include <stdio.h> |
| 20 | #include <string.h> |
| 21 | #include <com32.h> |
| 22 | |
| 23 | int main(int argc __unused, char *argv[] __unused) |
| 24 | { |
| 25 | com32sys_t inregs, outregs; |
| 26 | |
| 27 | memset(&inregs, 0, sizeof inregs); |
| 28 | |
| 29 | inregs.eax.l = 0x5300; /* APM Installation Check (00h) */ |
| 30 | inregs.ebx.l = 0; /* APM BIOS (0000h) */ |
| 31 | __intcall(0x15, &inregs, &outregs); |
| 32 | |
| 33 | if (outregs.eflags.l & EFLAGS_CF) { |
| 34 | printf("APM not present.\n"); |
| 35 | return 1; |
| 36 | } |
| 37 | |
| 38 | if ((outregs.ebx.l & 0xffff) != 0x504d) { /* signature 'PM' */ |
| 39 | printf("APM not present.\n"); |
| 40 | return 1; |
| 41 | } |
| 42 | |
| 43 | if ((outregs.eax.l & 0xffff) < 0x101) { /* Need version 1.1+ */ |
| 44 | printf("APM 1.1+ not supported.\n"); |
| 45 | return 1; |
| 46 | } |
| 47 | |
| 48 | if ((outregs.ecx.l & 0x8) == 0x8) { /* bit 3 APM BIOS Power Management disabled */ |
| 49 | printf("Power management disabled.\n"); |
| 50 | return 1; |
| 51 | } |
| 52 | |
| 53 | memset(&inregs, 0, sizeof inregs); |
| 54 | inregs.eax.l = 0x5301; /* APM Real Mode Interface Connect (01h) */ |
| 55 | inregs.ebx.l = 0; /* APM BIOS (0000h) */ |
| 56 | __intcall(0x15, &inregs, &outregs); |
| 57 | |
| 58 | if (outregs.eflags.l & EFLAGS_CF) { |
| 59 | printf("APM RM interface connect failed.\n"); |
| 60 | return 1; |
| 61 | } |
| 62 | |
| 63 | memset(&inregs, 0, sizeof inregs); |
| 64 | inregs.eax.l = 0x530e; /* APM Driver Version (0Eh) */ |
| 65 | inregs.ebx.l = 0; /* APM BIOS (0000h) */ |
| 66 | inregs.ecx.l = 0x101; /* APM Driver version 1.1 */ |
| 67 | __intcall(0x15, &inregs, &outregs); |
| 68 | |
| 69 | if (outregs.eflags.l & EFLAGS_CF) { |
| 70 | printf("APM 1.1+ not supported.\n"); |
| 71 | return 1; |
| 72 | } |
| 73 | |
| 74 | if ((outregs.ecx.l & 0xffff) < 0x101) { /* APM Connection version */ |
| 75 | printf("APM 1.1+ not supported.\n"); |
| 76 | return 1; |
| 77 | } |
| 78 | |
| 79 | memset(&inregs, 0, sizeof inregs); |
| 80 | inregs.eax.l = 0x5307; /* Set Power State (07h) */ |
| 81 | inregs.ebx.l = 1; /* All devices power managed by the APM BIOS */ |
| 82 | inregs.ecx.l = 3; /* Power state off */ |
| 83 | __intcall(0x15, &inregs, &outregs); |
| 84 | |
| 85 | if (outregs.eflags.l & EFLAGS_CF) { |
| 86 | printf("Power off failed.\n"); |
| 87 | return 1; |
| 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |