| 0,0 → 1,189 |
|---|
| /* |
| * 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. |
| */ |
| |
| |
| /** @addtogroup genarch |
| * @{ |
| */ |
| |
| /** |
| * @file |
| * @brief Advanced Configuration and Power Interface (ACPI) initialization. |
| */ |
| |
| #include <genarch/acpi/acpi.h> |
| #include <genarch/acpi/madt.h> |
| #include <arch/bios/bios.h> |
| #include <mm/as.h> |
| #include <mm/page.h> |
| #include <print.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[] = { |
| { (uint8_t *)"APIC", (void *) &acpi_madt, "Multiple APIC Description Table" } |
| }; |
| |
| static int rsdp_check(uint8_t *rsdp) { |
| struct acpi_rsdp *r = (struct acpi_rsdp *) rsdp; |
| uint8_t 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(uint8_t *sdt) |
| { |
| struct acpi_sdt_header *h = (struct acpi_sdt_header *) sdt; |
| uint8_t sum = 0; |
| int i; |
| |
| for (i=0; i<h->length; i++) |
| sum += sdt[i]; |
| |
| return !sum; |
| } |
| |
| static void map_sdt(struct acpi_sdt_header *sdt) |
| { |
| page_mapping_insert(AS_KERNEL, (uintptr_t) sdt, (uintptr_t) sdt, PAGE_NOT_CACHEABLE); |
| map_structure((uintptr_t) sdt, sdt->length); |
| } |
| |
| static void configure_via_rsdt(void) |
| { |
| int i, j, cnt = (acpi_rsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(uint32_t); |
| |
| 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 *) (unative_t) acpi_rsdt->entry[i]; |
| |
| map_sdt(h); |
| if (*((uint32_t *) &h->signature[0])==*((uint32_t *) &signature_map[j].signature[0])) { |
| if (!acpi_sdt_check((uint8_t *) h)) |
| goto next; |
| *signature_map[j].sdt_ptr = h; |
| printf("%#zx: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description); |
| } |
| } |
| next: |
| ; |
| } |
| } |
| |
| static void configure_via_xsdt(void) |
| { |
| int i, j, cnt = (acpi_xsdt->header.length - sizeof(struct acpi_sdt_header))/sizeof(uint64_t); |
| |
| 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 *) ((uintptr_t) acpi_rsdt->entry[i]); |
| |
| map_sdt(h); |
| if (*((uint32_t *) &h->signature[0])==*((uint32_t *) &signature_map[j].signature[0])) { |
| if (!acpi_sdt_check((uint8_t *) h)) |
| goto next; |
| *signature_map[j].sdt_ptr = h; |
| printf("%#zx: ACPI %s\n", *signature_map[j].sdt_ptr, signature_map[j].description); |
| } |
| } |
| next: |
| ; |
| } |
| |
| } |
| |
| void acpi_init(void) |
| { |
| uint8_t *addr[2] = { NULL, (uint8_t *) PA2KA(0xe0000) }; |
| int i, j, length[2] = { 1024, 128*1024 }; |
| uint64_t *sig = (uint64_t *) RSDP_SIGNATURE; |
| |
| /* |
| * Find Root System Description Pointer |
| * 1. search first 1K of EBDA |
| * 2. search 128K starting at 0xe0000 |
| */ |
| |
| addr[0] = (uint8_t *) PA2KA(ebda); |
| for (i = (ebda ? 0 : 1); i < 2; i++) { |
| for (j = 0; j < length[i]; j += 16) { |
| if (*((uint64_t *) &addr[i][j]) == *sig && rsdp_check(&addr[i][j])) { |
| acpi_rsdp = (struct acpi_rsdp *) &addr[i][j]; |
| goto rsdp_found; |
| } |
| } |
| } |
| |
| return; |
| |
| rsdp_found: |
| printf("%#zx: ACPI Root System Description Pointer\n", acpi_rsdp); |
| |
| acpi_rsdt = (struct acpi_rsdt *) (unative_t) acpi_rsdp->rsdt_address; |
| if (acpi_rsdp->revision) acpi_xsdt = (struct acpi_xsdt *) ((uintptr_t) 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((uint8_t *) acpi_rsdt)) { |
| printf("RSDT: %s\n", "bad checksum"); |
| return; |
| } |
| if (acpi_xsdt && !acpi_sdt_check((uint8_t *) acpi_xsdt)) { |
| printf("XSDT: %s\n", "bad checksum"); |
| return; |
| } |
| |
| if (acpi_xsdt) configure_via_xsdt(); |
| else if (acpi_rsdt) configure_via_rsdt(); |
| |
| } |
| |
| |
| /** @} |
| */ |
| |