77 lines
No EOL
3.5 KiB
C
77 lines
No EOL
3.5 KiB
C
/*********************************************************************************/
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/* Module Name: acpi.c */
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/* Project: AurixOS */
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/* */
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/* Copyright (c) 2024-2025 Jozef Nagy */
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/* */
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/* This source is subject to the MIT License. */
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/* See License.txt in the root of this repository. */
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/* All other rights reserved. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */
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/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */
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/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */
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/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */
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/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
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/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */
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/* SOFTWARE. */
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/*********************************************************************************/
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#include <lib/string.h>
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#include <print.h>
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#include <stdint.h>
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#include <efi.h>
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#include <efilib.h>
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uintptr_t platform_get_rsdp()
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{
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EFI_GUID acpi10_guid = EFI_ACPI_10_TABLE_GUID;
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EFI_GUID acpi20_guid = EFI_ACPI_20_TABLE_GUID;
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uintptr_t rsdp_addr = 0;
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for (EFI_UINTN i = 0; i < gSystemTable->NumberOfTableEntries; i++) {
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if (memcmp(&(gSystemTable->ConfigurationTable[i].VendorGuid), &acpi10_guid, sizeof(EFI_GUID)) == 0) {
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log("platform_get_rsdp(): Found RSDP (ACPI 1.0) at 0x%llx\n", gSystemTable->ConfigurationTable[i].VendorTable);
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rsdp_addr = (uintptr_t)gSystemTable->ConfigurationTable[i].VendorTable;
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}
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// ACPI 2.0+ always takes higher priority over older version
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if (memcmp(&(gSystemTable->ConfigurationTable[i].VendorGuid), &acpi20_guid, sizeof(EFI_GUID)) == 0) {
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log("platform_get_rsdp(): Found RSDP (ACPI 2.0+) at 0x%llx\n", gSystemTable->ConfigurationTable[i].VendorTable);
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return (uintptr_t)gSystemTable->ConfigurationTable[i].VendorTable;
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}
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}
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if (rsdp_addr == 0) {
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log("platform_get_rsdp(): RSDP not found!\n");
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}
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return rsdp_addr;
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}
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uintptr_t platform_get_smbios()
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{
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EFI_GUID smbios_guid = SMBIOS_TABLE_GUID;
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EFI_GUID smbios3_guid = SMBIOS3_TABLE_GUID;
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uintptr_t smbios_addr = 0;
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for (EFI_UINTN i = 0; i < gSystemTable->NumberOfTableEntries; i++) {
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if (memcmp(&(gSystemTable->ConfigurationTable[i].VendorGuid), &smbios_guid, sizeof(EFI_GUID)) == 0) {
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log("platform_get_rsmbios(): Found SMBIOS at 0x%llx\n", gSystemTable->ConfigurationTable[i].VendorTable);
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smbios_addr = (uintptr_t)gSystemTable->ConfigurationTable[i].VendorTable;
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}
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// SMBIOS3 always takes higher priority over older version
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if (memcmp(&(gSystemTable->ConfigurationTable[i].VendorGuid), &smbios3_guid, sizeof(EFI_GUID)) == 0) {
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log("platform_get_smbios(): Found SMBIOS3 at 0x%llx\n", gSystemTable->ConfigurationTable[i].VendorTable);
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return (uintptr_t)gSystemTable->ConfigurationTable[i].VendorTable;
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}
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}
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if (smbios_addr == 0) {
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log("platform_get_smbios(): SMBIOS not found!\n");
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}
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return smbios_addr;
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} |