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 "biosvar.h" // struct bregs
11 #include "ioport.h" // outb
12 #include "util.h" // irq_enable
15 out_str(const char *str_cs)
17 if (CONFIG_COREBOOT) {
18 dprintf(1, "APM request '%s'\n", str_cs);
24 u8 c = GET_VAR(CS, *s);
27 outb(c, PORT_BIOS_APM);
32 // APM installation check
34 handle_155300(struct bregs *regs)
36 regs->ah = 1; // APM major version
37 regs->al = 2; // APM minor version
40 // bit 0 : 16 bit interface supported
41 // bit 1 : 32 bit interface supported
46 // APM real mode interface connect
48 handle_155301(struct bregs *regs)
53 // Assembler entry points defined in romlayout.S
54 extern void apm16protected_entry();
55 extern void apm32protected_entry();
57 // APM 16 bit protected mode interface connect
59 handle_155302(struct bregs *regs)
61 regs->bx = (u32)apm16protected_entry;
62 regs->ax = SEG_BIOS; // 16 bit code segment base
63 regs->si = 0xfff0; // 16 bit code segment size
64 regs->cx = SEG_BIOS; // data segment address
65 regs->di = 0xfff0; // data segment length
69 // APM 32 bit protected mode interface connect
71 handle_155303(struct bregs *regs)
73 regs->ax = SEG_BIOS; // 32 bit code segment base
74 regs->ebx = (u32)apm32protected_entry;
75 regs->cx = SEG_BIOS; // 16 bit code segment base
76 // 32 bit code segment size (low 16 bits)
77 // 16 bit code segment size (high 16 bits)
78 regs->esi = 0xfff0fff0;
79 regs->dx = SEG_BIOS; // data segment address
80 regs->di = 0xfff0; // data segment length
84 // APM interface disconnect
86 handle_155304(struct bregs *regs)
93 handle_155305(struct bregs *regs)
100 // APM Set Power State
102 handle_155307(struct bregs *regs)
126 handle_155308(struct bregs *regs)
133 handle_15530a(struct bregs *regs)
135 regs->bh = 0x01; // on line
136 regs->bl = 0xff; // unknown battery status
137 regs->ch = 0x80; // no system battery
138 regs->cl = 0xff; // unknown remaining time
139 regs->dx = 0xffff; // unknown remaining time
140 regs->si = 0x00; // zero battery
146 handle_15530b(struct bregs *regs)
149 regs->ah = 0x80; // no event pending
152 // APM Driver Version
154 handle_15530e(struct bregs *regs)
161 // APM Engage / Disengage
163 handle_15530f(struct bregs *regs)
168 // APM Get Capabilities
170 handle_155310(struct bregs *regs)
178 handle_1553XX(struct bregs *regs)
184 handle_1553(struct bregs *regs)
186 if (! CONFIG_APMBIOS) {
187 set_code_fail(regs, RET_EUNSUPPORTED);
193 case 0x00: handle_155300(regs); break;
194 case 0x01: handle_155301(regs); break;
195 case 0x02: handle_155302(regs); break;
196 case 0x03: handle_155303(regs); break;
197 case 0x04: handle_155304(regs); break;
198 case 0x05: handle_155305(regs); break;
199 case 0x07: handle_155307(regs); break;
200 case 0x08: handle_155308(regs); break;
201 case 0x0a: handle_15530a(regs); break;
202 case 0x0b: handle_15530b(regs); break;
203 case 0x0e: handle_15530e(regs); break;
204 case 0x0f: handle_15530f(regs); break;
205 case 0x10: handle_155310(regs); break;
206 default: handle_1553XX(regs); break;