WebSVN – HelenOS-historic – Diff – /kernel/trunk/genarch/src/acpi/acpi.c


/*
 * Copyright (C) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <arch/acpi/acpi.h>
#include <arch/acpi/madt.h>
#include <arch/bios/bios.h>
 
#include <mm/page.h>
 
#define RSDP_SIGNATURE      "RSD PTR "
#define RSDP_REVISION_OFFS  15
 
struct acpi_rsdp *acpi_rsdp = NULL;
struct acpi_rsdt *acpi_rsdt = NULL;
struct acpi_xsdt *acpi_xsdt = NULL;
 
struct acpi_signature_map signature_map[] = {
    { "APIC", (struct acpi_sdt_header **) &acpi_madt, "Multiple APIC Description Table" }
};
 
int rsdp_check(__u8 *rsdp) {
    struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp;
    __u8 sum = 0;
    int i;
   
    for (i=0; i<20; i++)
        sum += rsdp[i];
       
    if (sum)   
        return 0; /* bad checksum */
 
    if (r->revision == 0)
        return 1; /* ACPI 1.0 */
       
    for (; i<r->length; i++)
        sum += rsdp[i];
       
    return !sum;
   
}
 
int acpi_sdt_check(__u8 *sdt)
{
    struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt;
    __u8 sum = 0;
    int i;
 
    for (i=0; i<h->length; i++)
        sum += sdt[i];
       
    return !sum;
}
 
void map_sdt(struct acpi_sdt_header *sdt)
{
    map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
    map_structure((__address) sdt, sdt->length);
}
 
void acpi_init(void)
{
    __u8 *addr[2] = { NULL, (__u8 *) 0xe0000 };
    int i, j, length[2] = { 1024, 128*1024 };
    __u64 *sig = (__u64 *) RSDP_SIGNATURE;
 
    /*
     * Find Root System Description Pointer
     * 1. search first 1K of EBDA
     * 2. search 128K starting at 0xe0000
     */
 
    addr[0] = (__u8 *) ebda;
    for (i = (ebda ? 0 : 1); i < 2; i++) {
        for (j = 0; j < length[i]; j += 16) {
            if (*((__u64 *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
                acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
                goto rsdp_found;
            }
        }
    }
 
    return;
 
rsdp_found:
    printf("%L: ACPI Root System Description Pointer\n", acpi_rsdp);
 
    acpi_rsdt = (struct acpi_rsdt *) acpi_rsdp->rsdt_address;
    if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((__address) acpi_rsdp->xsdt_address);
 
    if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);
    if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);  
 
    if (acpi_rsdt && !acpi_sdt_check((__u8 *) acpi_rsdt)) {
        printf("RSDT: %s\n", "bad checksum");
        return;
    }
    if (acpi_xsdt && !acpi_sdt_check((__u8 *) acpi_xsdt)) {
        printf("XSDT: %s\n", "bad checksum");
        return;
    }
 
    if (acpi_xsdt) configure_via_xsdt();
    else if (acpi_rsdt) configure_via_rsdt();
 
}
 
void configure_via_rsdt(void)
{
    int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u32);
   
    for (i=0; i<cnt; i++) {
        for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) acpi_rsdt->entry[i];
       
            map_sdt(h);
            if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
                if (!acpi_sdt_check((__u8 *) h))
                    goto next;
                *signature_map[j].sdt_ptr = h;
                printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
            }
        }
next:
        ;
    }
}
 
void configure_via_xsdt(void)
{
    int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u64);
   
    for (i=0; i<cnt; i++) {
        for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
            struct acpi_sdt_header *h = (struct acpi_sdt_header *) ((__address) acpi_rsdt->entry[i]);
 
            map_sdt(h);
            if (*((__u32 *) &h->signature[0])==*((__u32 *) &signature_map[j].signature[0])) {
                if (!acpi_sdt_check((__u8 *) h))
                    goto next;
                *signature_map[j].sdt_ptr = h;
                printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
            }
        }
next:
        ;
    }
 
}
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/genarch/src/acpi/acpi.c @ 1735 – Rev 116 → 125

Rev 116		Rev 125
1	/*	1	/*
2	* Copyright (C) 2005 Jakub Jermar	2	* Copyright (C) 2005 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <arch/acpi/acpi.h>	29	#include <arch/acpi/acpi.h>
30	#include <arch/acpi/madt.h>	30	#include <arch/acpi/madt.h>
31	#include <arch/bios/bios.h>	31	#include <arch/bios/bios.h>
32		32
33	#include <mm/page.h>	33	#include <mm/page.h>
34		34
35	#define RSDP_SIGNATURE "RSD PTR "	35	#define RSDP_SIGNATURE "RSD PTR "
36	#define RSDP_REVISION_OFFS 15	36	#define RSDP_REVISION_OFFS 15
37		37
38	struct acpi_rsdp *acpi_rsdp = NULL;	38	struct acpi_rsdp *acpi_rsdp = NULL;
39	struct acpi_rsdt *acpi_rsdt = NULL;	39	struct acpi_rsdt *acpi_rsdt = NULL;
40	struct acpi_xsdt *acpi_xsdt = NULL;	40	struct acpi_xsdt *acpi_xsdt = NULL;
41		41
42	struct acpi_signature_map signature_map[] = {	42	struct acpi_signature_map signature_map[] = {
43	{ "APIC", (struct acpi_sdt_header **) &acpi_madt, "Multiple APIC Description Table" }	43	{ "APIC", (struct acpi_sdt_header **) &acpi_madt, "Multiple APIC Description Table" }
44	};	44	};
45		45
46	int rsdp_check(__u8 *rsdp) {	46	int rsdp_check(__u8 *rsdp) {
47	struct acpi_rsdp r = (struct acpi_rsdp ) rsdp;	47	struct acpi_rsdp r = (struct acpi_rsdp ) rsdp;
48	__u8 sum = 0;	48	__u8 sum = 0;
49	int i;	49	int i;
50		50
51	for (i=0; i<20; i++)	51	for (i=0; i<20; i++)
52	sum += rsdp[i];	52	sum += rsdp[i];
53		53
54	if (sum)	54	if (sum)
55	return 0; /* bad checksum */	55	return 0; /* bad checksum */
56		56
57	if (r->revision == 0)	57	if (r->revision == 0)
58	return 1; /* ACPI 1.0 */	58	return 1; /* ACPI 1.0 */
59		59
60	for (; i<r->length; i++)	60	for (; i<r->length; i++)
61	sum += rsdp[i];	61	sum += rsdp[i];
62		62
63	return !sum;	63	return !sum;
64		64
65	}	65	}
66		66
67	int acpi_sdt_check(__u8 *sdt)	67	int acpi_sdt_check(__u8 *sdt)
68	{	68	{
69	struct acpi_sdt_header h = (struct acpi_sdt_header ) sdt;	69	struct acpi_sdt_header h = (struct acpi_sdt_header ) sdt;
70	__u8 sum = 0;	70	__u8 sum = 0;
71	int i;	71	int i;
72		72
73	for (i=0; i<h->length; i++)	73	for (i=0; i<h->length; i++)
74	sum += sdt[i];	74	sum += sdt[i];
75		75
76	return !sum;	76	return !sum;
77	}	77	}
78		78
79	void map_sdt(struct acpi_sdt_header *sdt)	79	void map_sdt(struct acpi_sdt_header *sdt)
80	{	80	{
81	map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);	81	map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
82	map_structure((__address) sdt, sdt->length);	82	map_structure((__address) sdt, sdt->length);
83	}	83	}
84		84
85	void acpi_init(void)	85	void acpi_init(void)
86	{	86	{
87	__u8 addr[2] = { NULL, (__u8 ) 0xe0000 };	87	__u8 addr[2] = { NULL, (__u8 ) 0xe0000 };
88	int i, j, length[2] = { 1024, 128*1024 };	88	int i, j, length[2] = { 1024, 128*1024 };
89	__u64 sig = (__u64 ) RSDP_SIGNATURE;	89	__u64 sig = (__u64 ) RSDP_SIGNATURE;
90		90
91	/*	91	/*
92	* Find Root System Description Pointer	92	* Find Root System Description Pointer
93	* 1. search first 1K of EBDA	93	* 1. search first 1K of EBDA
94	* 2. search 128K starting at 0xe0000	94	* 2. search 128K starting at 0xe0000
95	*/	95	*/
96		96
97	addr[0] = (__u8 *) ebda;	97	addr[0] = (__u8 *) ebda;
98	for (i = (ebda ? 0 : 1); i < 2; i++) {	98	for (i = (ebda ? 0 : 1); i < 2; i++) {
99	for (j = 0; j < length[i]; j += 16) {	99	for (j = 0; j < length[i]; j += 16) {
100	if (((__u64 ) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {	100	if (((__u64 ) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) {
101	acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];	101	acpi_rsdp = (struct acpi_rsdp *) &addr[i][j];
102	goto rsdp_found;	102	goto rsdp_found;
103	}	103	}
104	}	104	}
105	}	105	}
106		106
107	return;	107	return;
108		108
109	rsdp_found:	109	rsdp_found:
110	printf("%L: ACPI Root System Description Pointer\n", acpi_rsdp);	110	printf("%L: ACPI Root System Description Pointer\n", acpi_rsdp);
111		111
112	acpi_rsdt = (struct acpi_rsdt *) acpi_rsdp->rsdt_address;	112	acpi_rsdt = (struct acpi_rsdt *) acpi_rsdp->rsdt_address;
113	if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((__address) acpi_rsdp->xsdt_address);	113	if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((__address) acpi_rsdp->xsdt_address);
114		114
115	if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);	115	if (acpi_rsdt) map_sdt((struct acpi_sdt_header *) acpi_rsdt);
116	if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);	116	if (acpi_xsdt) map_sdt((struct acpi_sdt_header *) acpi_xsdt);
117		117
118	if (acpi_rsdt && !acpi_sdt_check((__u8 *) acpi_rsdt)) {	118	if (acpi_rsdt && !acpi_sdt_check((__u8 *) acpi_rsdt)) {
119	printf("RSDT: %s\n", "bad checksum");	119	printf("RSDT: %s\n", "bad checksum");
120	return;	120	return;
121	}	121	}
122	if (acpi_xsdt && !acpi_sdt_check((__u8 *) acpi_xsdt)) {	122	if (acpi_xsdt && !acpi_sdt_check((__u8 *) acpi_xsdt)) {
123	printf("XSDT: %s\n", "bad checksum");	123	printf("XSDT: %s\n", "bad checksum");
124	return;	124	return;
125	}	125	}
126		126
127	if (acpi_xsdt) configure_via_xsdt();	127	if (acpi_xsdt) configure_via_xsdt();
128	else if (acpi_rsdt) configure_via_rsdt();	128	else if (acpi_rsdt) configure_via_rsdt();
129		129
130	}	130	}
131		131
132	void configure_via_rsdt(void)	132	void configure_via_rsdt(void)
133	{	133	{
134	int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u32);	134	int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u32);
135		135
136	for (i=0; i<cnt; i++) {	136	for (i=0; i<cnt; i++) {
137	for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {	137	for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
138	struct acpi_sdt_header h = (struct acpi_sdt_header ) acpi_rsdt->entry[i];	138	struct acpi_sdt_header h = (struct acpi_sdt_header ) acpi_rsdt->entry[i];
139		139
140	map_sdt(h);	140	map_sdt(h);
141	if (((__u32 ) &h->signature[0])==((__u32 ) &signature_map[j].signature[0])) {	141	if (((__u32 ) &h->signature[0])==((__u32 ) &signature_map[j].signature[0])) {
142	if (!acpi_sdt_check((__u8 *) h))	142	if (!acpi_sdt_check((__u8 *) h))
143	goto next;	143	goto next;
144	*signature_map[j].sdt_ptr = h;	144	*signature_map[j].sdt_ptr = h;
145	printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);	145	printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
146	}	146	}
147	}	147	}
148	next:	148	next:
149	;	149	;
150	}	150	}
151	}	151	}
152		152
153	void configure_via_xsdt(void)	153	void configure_via_xsdt(void)
154	{	154	{
155	int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u64);	155	int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(__u64);
156		156
157	for (i=0; i<cnt; i++) {	157	for (i=0; i<cnt; i++) {
158	for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {	158	for (j=0; j<sizeof(signature_map)/sizeof(struct acpi_signature_map); j++) {
159	struct acpi_sdt_header h = (struct acpi_sdt_header ) ((__address) acpi_rsdt->entry[i]);	159	struct acpi_sdt_header h = (struct acpi_sdt_header ) ((__address) acpi_rsdt->entry[i]);
160		160
161	map_sdt(h);	161	map_sdt(h);
162	if (((__u32 ) &h->signature[0])==((__u32 ) &signature_map[j].signature[0])) {	162	if (((__u32 ) &h->signature[0])==((__u32 ) &signature_map[j].signature[0])) {
163	if (!acpi_sdt_check((__u8 *) h))	163	if (!acpi_sdt_check((__u8 *) h))
164	goto next;	164	goto next;
165	*signature_map[j].sdt_ptr = h;	165	*signature_map[j].sdt_ptr = h;
166	printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);	166	printf("%L: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description);
167	}	167	}
168	}	168	}
169	next:	169	next:
170	;	170	;
171	}	171	}
172		172
173	}	173	}
174		174