1 // Basic support for apmbios callbacks.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2005 Struan Bartlett
5 // Copyright (C) 2004 Fabrice Bellard
7 // This file may be distributed under the terms of the GNU GPLv3 license.
9 #include "farptr.h" // GET_VAR
10 #include "bregs.h" // struct bregs
11 #include "ioport.h" // outb
12 #include "util.h" // irq_enable
13 #include "config.h" // CONFIG_*
16 out_str(const char *str_cs)
18 if (CONFIG_COREBOOT) {
19 dprintf(1, "APM request '%s'\n", str_cs);
25 u8 c = GET_VAR(CS, *s);
28 outb(c, PORT_BIOS_APM);
33 // APM installation check
35 handle_155300(struct bregs *regs)
37 regs->ah = 1; // APM major version
38 regs->al = 2; // APM minor version
41 // bit 0 : 16 bit interface supported
42 // bit 1 : 32 bit interface supported
47 // APM real mode interface connect
49 handle_155301(struct bregs *regs)
54 // Assembler entry points defined in romlayout.S
55 extern void apm16protected_entry();
56 extern void apm32protected_entry();
58 // APM 16 bit protected mode interface connect
60 handle_155302(struct bregs *regs)
62 regs->bx = (u32)apm16protected_entry;
63 regs->ax = SEG_BIOS; // 16 bit code segment base
64 regs->si = 0xfff0; // 16 bit code segment size
65 regs->cx = SEG_BIOS; // data segment address
66 regs->di = 0xfff0; // data segment length
70 // APM 32 bit protected mode interface connect
72 handle_155303(struct bregs *regs)
74 regs->ax = SEG_BIOS; // 32 bit code segment base
75 regs->ebx = (u32)apm32protected_entry;
76 regs->cx = SEG_BIOS; // 16 bit code segment base
77 // 32 bit code segment size (low 16 bits)
78 // 16 bit code segment size (high 16 bits)
79 regs->esi = 0xfff0fff0;
80 regs->dx = SEG_BIOS; // data segment address
81 regs->di = 0xfff0; // data segment length
85 // APM interface disconnect
87 handle_155304(struct bregs *regs)
94 handle_155305(struct bregs *regs)
103 handle_155306(struct bregs *regs)
108 // APM Set Power State
110 handle_155307(struct bregs *regs)
134 handle_155308(struct bregs *regs)
141 handle_15530a(struct bregs *regs)
143 regs->bh = 0x01; // on line
144 regs->bl = 0xff; // unknown battery status
145 regs->ch = 0x80; // no system battery
146 regs->cl = 0xff; // unknown remaining time
147 regs->dx = 0xffff; // unknown remaining time
148 regs->si = 0x00; // zero battery
152 #define RET_ENOEVENT 0x80
156 handle_15530b(struct bregs *regs)
158 set_code_fail_silent(regs, RET_ENOEVENT);
161 // APM Driver Version
163 handle_15530e(struct bregs *regs)
170 // APM Engage / Disengage
172 handle_15530f(struct bregs *regs)
177 // APM Get Capabilities
179 handle_155310(struct bregs *regs)
187 handle_1553XX(struct bregs *regs)
193 handle_1553(struct bregs *regs)
195 if (! CONFIG_APMBIOS) {
196 set_code_fail(regs, RET_EUNSUPPORTED);
202 case 0x00: handle_155300(regs); break;
203 case 0x01: handle_155301(regs); break;
204 case 0x02: handle_155302(regs); break;
205 case 0x03: handle_155303(regs); break;
206 case 0x04: handle_155304(regs); break;
207 case 0x05: handle_155305(regs); break;
208 case 0x06: handle_155306(regs); break;
209 case 0x07: handle_155307(regs); break;
210 case 0x08: handle_155308(regs); break;
211 case 0x0a: handle_15530a(regs); break;
212 case 0x0b: handle_15530b(regs); break;
213 case 0x0e: handle_15530e(regs); break;
214 case 0x0f: handle_15530f(regs); break;
215 case 0x10: handle_155310(regs); break;
216 default: handle_1553XX(regs); break;