Annotation of sys/arch/i386/stand/libsa/apmprobe.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: apmprobe.c,v 1.14 2005/11/14 23:50:26 martin Exp $ */
2:
3: /*
4: * Copyright (c) 1997-2000 Michael Shalayeff
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19: * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
20: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22: * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25: * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
26: * THE POSSIBILITY OF SUCH DAMAGE.
27: */
28: /*
29: * APM derived from: apm_init.S, LP (Laptop Package)
30: * wich contained this:
31: * Copyright (C) 1994 by HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>
32: *
33: */
34: /*
35: * If you want to know the specification of APM BIOS, see the following
36: * documentations,
37: *
38: * [1] Intel Corporation and Microsoft Corporation, "Advanced Power
39: * Management, The Next Generation, Version 1.0", Feb.,1992.
40: *
41: * [2] Intel Corporation and Microsoft Corporation, "Advanced Power
42: * Management (APM) BIOS Interface Specification Revision 1.1",
43: * Sep.,1993, Intel Order Number: 241704-001, Microsoft Part
44: * Number: 781-110-X01
45: *
46: * or contact
47: *
48: * APM Support Desk (Intel Corporation, US)
49: * TEL: (800)628-8686
50: * FAX: (916)356-6100.
51: */
52:
53: #include <sys/param.h>
54: #include "libsa.h"
55: #include <stand/boot/bootarg.h>
56:
57: #include <uvm/uvm_extern.h>
58:
59: #include <dev/isa/isareg.h>
60:
61: #include <machine/apmvar.h>
62: #include <machine/biosvar.h>
63:
64: #define vm_page_size 4096
65:
66: #include "debug.h"
67:
68: extern int debug;
69:
70: static __inline u_int
71: apm_check(void)
72: {
73: register u_int detail;
74: register u_int8_t f;
75:
76: __asm __volatile(DOINT(0x15) "\n\t"
77: "setc %b1\n\t"
78: "movzwl %%ax, %0\n\t"
79: "shll $16, %%ecx\n\t"
80: "orl %%ecx, %0"
81: : "=a" (detail), "=b" (f)
82: : "0" (APM_INSTCHECK), "1" (APM_DEV_APM_BIOS)
83: : "%ecx", "cc");
84:
85: if (f || BIOS_regs.biosr_bx != 0x504d /* "PM" */ ) {
86: #ifdef DEBUG
87: if (debug)
88: printf("apm_check: %x, %x, %x\n",
89: f, BIOS_regs.biosr_bx, detail);
90: #endif
91: return 0;
92: } else
93: return detail;
94: }
95:
96: static __inline int
97: apm_disconnect(void)
98: {
99: register u_int16_t rv;
100:
101: __asm __volatile(DOINT(0x15) "\n\t"
102: "setc %b0"
103: : "=a" (rv)
104: : "0" (APM_DISCONNECT), "b" (APM_DEV_APM_BIOS)
105: : "%ecx", "%edx", "cc");
106:
107: return ((rv & 0xff)? rv >> 8 : 0);
108: }
109:
110: static __inline int
111: apm_connect(bios_apminfo_t *ai)
112: {
113: register u_int16_t f;
114:
115: __asm __volatile (DOINT(0x15) "\n\t"
116: "setc %b1\n\t"
117: "movb %%ah, %h1\n\t"
118: "movzwl %%ax, %%eax\n\tshll $4, %0\n\t"
119: "movzwl %%cx, %%ecx\n\tshll $4, %2\n\t"
120: "movzwl %%dx, %%edx\n\tshll $4, %3\n\t"
121: : "=a" (ai->apm_code32_base),
122: "=b" (f),
123: "=c" (ai->apm_code16_base),
124: "=d" (ai->apm_data_base)
125: : "0" (APM_PROT32_CONNECT), "1" (APM_DEV_APM_BIOS)
126: : "cc");
127:
128: if (f & 0xff)
129: return (f >> 8);
130:
131: ai->apm_entry = BIOS_regs.biosr_bx;
132: #if 0
133: ai->apm_code_len = BIOS_regs.biosr_si & 0xffff;
134: ai->apm_code16_len = BIOS_regs.biosr_si & 0xffff;
135: ai->apm_data_len = BIOS_regs.biosr_di & 0xffff;
136: #else
137: ai->apm_code_len = 0xffff - (ai->apm_code32_base & 0xffff);
138: ai->apm_code16_len = 0xffff - (ai->apm_code16_base & 0xffff);
139: ai->apm_data_len = 0xffff - (ai->apm_data_base & 0xffff);
140: #endif
141: if (ai->apm_data_base < BOOTARG_OFF)
142: ai->apm_data_len = NBPG - (ai->apm_data_base & PGOFSET) - 1;
143:
144: #ifdef DEBUG
145: if (debug)
146: printf("cs=%x:%x/%x:%x, ds=%x:%x\n",
147: ai->apm_code32_base, ai->apm_code_len,
148: ai->apm_code16_base, ai->apm_code16_len,
149: ai->apm_data_base, ai->apm_data_len);
150: #endif
151: /* inform apm bios about our driver version */
152: __asm __volatile (DOINT(0x15) "\n\t"
153: "setc %b1\n\t"
154: "movb %%ah, %h1"
155: : "=b" (f)
156: : "a" (APM_DRIVER_VERSION),
157: "0" (APM_DEV_APM_BIOS),
158: "c" (APM_VERSION)
159: : "cc");
160:
161: return 0;
162: }
163:
164: static bios_apminfo_t ai;
165:
166: void
167: apmprobe(void)
168: {
169: if ((ai.apm_detail = apm_check())) {
170:
171: apm_disconnect();
172:
173: if (apm_connect(&ai) != 0) {
174: printf("\napm: connect error\n");
175: return;
176: }
177: #ifdef DEBUG
178: if (debug)
179: printf("apm[%x cs=%x[%x]/%x[%x] ds=%x[%x] @ %x]",
180: ai.apm_detail,
181: ai.apm_code32_base, ai.apm_code_len,
182: ai.apm_code16_base, ai.apm_code16_len,
183: ai.apm_data_base, ai.apm_data_len,
184: ai.apm_entry);
185: else
186: printf(" apm");
187: #else
188: printf(" apm");
189: #endif
190: addbootarg(BOOTARG_APMINFO, sizeof(ai), &ai);
191: }
192: }
193:
194: void
195: apmfixmem(void)
196: {
197: #ifdef DEBUG
198: printf("apmremove (%d)", ai.apm_detail);
199: #endif
200: if (ai.apm_detail)
201: mem_delete(trunc_page(ai.apm_data_base),
202: round_page(ai.apm_data_base + ai.apm_data_len));
203: }
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