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1.1 root 1: // Basic support for apmbios callbacks.
2: //
3: // Copyright (C) 2008 Kevin O'Connor <[email protected]>
4: // Copyright (C) 2005 Struan Bartlett
5: // Copyright (C) 2004 Fabrice Bellard
6: //
7: // This file may be distributed under the terms of the GNU LGPLv3 license.
8:
9: #include "farptr.h" // GET_VAR
10: #include "bregs.h" // struct bregs
11: #include "ioport.h" // outb
12: #include "util.h" // wait_irq
13: #include "config.h" // CONFIG_*
14: #include "biosvar.h" // GET_GLOBAL
15:
16: static void
17: out_str(const char *str_cs)
18: {
19: if (CONFIG_COREBOOT) {
20: dprintf(1, "APM request '%s'\n", str_cs);
21: return;
22: }
23:
24: u8 *s = (u8*)str_cs;
25: for (;;) {
26: u8 c = GET_GLOBAL(*s);
27: if (!c)
28: break;
29: outb(c, PORT_BIOS_APM);
30: s++;
31: }
32: }
33:
34: // APM installation check
35: static void
36: handle_155300(struct bregs *regs)
37: {
38: regs->ah = 1; // APM major version
39: regs->al = 2; // APM minor version
40: regs->bh = 'P';
41: regs->bl = 'M';
42: // bit 0 : 16 bit interface supported
43: // bit 1 : 32 bit interface supported
44: regs->cx = 0x03;
45: set_success(regs);
46: }
47:
48: // APM real mode interface connect
49: static void
50: handle_155301(struct bregs *regs)
51: {
52: set_success(regs);
53: }
54:
55: // Assembler entry points defined in romlayout.S
56: extern void apm16protected_entry();
57: extern void apm32protected_entry();
58:
59: // APM 16 bit protected mode interface connect
60: static void
61: handle_155302(struct bregs *regs)
62: {
63: regs->bx = (u32)apm16protected_entry;
64: regs->ax = SEG_BIOS; // 16 bit code segment base
65: regs->si = 0xfff0; // 16 bit code segment size
66: regs->cx = SEG_BIOS; // data segment address
67: regs->di = 0xfff0; // data segment length
68: set_success(regs);
69: }
70:
71: // APM 32 bit protected mode interface connect
72: static void
73: handle_155303(struct bregs *regs)
74: {
75: regs->ax = SEG_BIOS; // 32 bit code segment base
76: regs->ebx = (u32)apm32protected_entry;
77: regs->cx = SEG_BIOS; // 16 bit code segment base
78: // 32 bit code segment size (low 16 bits)
79: // 16 bit code segment size (high 16 bits)
80: regs->esi = 0xfff0fff0;
81: regs->dx = SEG_BIOS; // data segment address
82: regs->di = 0xfff0; // data segment length
83: set_success(regs);
84: }
85:
86: // APM interface disconnect
87: static void
88: handle_155304(struct bregs *regs)
89: {
90: set_success(regs);
91: }
92:
93: // APM cpu idle
94: static void
95: handle_155305(struct bregs *regs)
96: {
97: wait_irq();
98: set_success(regs);
99: }
100:
101: // APM cpu busy
102: static void
103: handle_155306(struct bregs *regs)
104: {
105: set_success(regs);
106: }
107:
108: // APM Set Power State
109: static void
110: handle_155307(struct bregs *regs)
111: {
112: if (regs->bx != 1) {
113: set_success(regs);
114: return;
115: }
116: switch (regs->cx) {
117: case 1:
118: out_str("Standby");
119: break;
120: case 2:
121: out_str("Suspend");
122: break;
123: case 3:
124: irq_disable();
125: out_str("Shutdown");
126: for (;;)
127: hlt();
128: break;
129: }
130: set_success(regs);
131: }
132:
133: static void
134: handle_155308(struct bregs *regs)
135: {
136: set_success(regs);
137: }
138:
139: // Get Power Status
140: static void
141: handle_15530a(struct bregs *regs)
142: {
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
149: set_success(regs);
150: }
151:
152: #define RET_ENOEVENT 0x80
153:
154: // Get PM Event
155: static void
156: handle_15530b(struct bregs *regs)
157: {
158: set_code_invalid_silent(regs, RET_ENOEVENT);
159: }
160:
161: // APM Driver Version
162: static void
163: handle_15530e(struct bregs *regs)
164: {
165: regs->ah = 1;
166: regs->al = 2;
167: set_success(regs);
168: }
169:
170: // APM Engage / Disengage
171: static void
172: handle_15530f(struct bregs *regs)
173: {
174: set_success(regs);
175: }
176:
177: // APM Get Capabilities
178: static void
179: handle_155310(struct bregs *regs)
180: {
181: regs->bl = 0;
182: regs->cx = 0;
183: set_success(regs);
184: }
185:
186: static void
187: handle_1553XX(struct bregs *regs)
188: {
189: set_unimplemented(regs);
190: }
191:
192: void VISIBLE16
193: handle_1553(struct bregs *regs)
194: {
195: if (! CONFIG_APMBIOS) {
196: set_code_invalid(regs, RET_EUNSUPPORTED);
197: return;
198: }
199:
200: //debug_stub(regs);
201: switch (regs->al) {
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;
217: }
218: }
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