| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2005-2009 coresystems GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <console/console.h> |
| #include <string.h> |
| #include <arch/acpi.h> |
| #include <cbmem.h> |
| #include <cpu/cpu.h> |
| #include <timestamp.h> |
| #include <romstage_handoff.h> |
| #include <rules.h> |
| |
| #if ENV_RAMSTAGE |
| |
| /* This is filled with acpi_is_wakeup() call early in ramstage. */ |
| int acpi_slp_type = -1; |
| |
| #if IS_ENABLED(CONFIG_EARLY_CBMEM_INIT) |
| int acpi_get_sleep_type(void) |
| { |
| struct romstage_handoff *handoff; |
| |
| handoff = cbmem_find(CBMEM_ID_ROMSTAGE_INFO); |
| |
| if (handoff == NULL) { |
| printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n"); |
| return ACPI_S0; |
| } else if (handoff->s3_resume) { |
| printk(BIOS_DEBUG, "S3 Resume.\n"); |
| return ACPI_S3; |
| } else { |
| printk(BIOS_DEBUG, "Normal boot.\n"); |
| return ACPI_S0; |
| } |
| } |
| #endif |
| |
| static void acpi_handoff_wakeup(void) |
| { |
| if (acpi_slp_type < 0) |
| acpi_slp_type = acpi_get_sleep_type(); |
| } |
| |
| int acpi_is_wakeup(void) |
| { |
| acpi_handoff_wakeup(); |
| /* Both resume from S2 and resume from S3 restart at CPU reset */ |
| return (acpi_slp_type == ACPI_S3 || acpi_slp_type == ACPI_S2); |
| } |
| |
| int acpi_is_wakeup_s3(void) |
| { |
| acpi_handoff_wakeup(); |
| return (acpi_slp_type == ACPI_S3); |
| } |
| |
| int acpi_is_wakeup_s4(void) |
| { |
| acpi_handoff_wakeup(); |
| return (acpi_slp_type == ACPI_S4); |
| } |
| |
| void acpi_fail_wakeup(void) |
| { |
| if (acpi_slp_type == ACPI_S3 || acpi_slp_type == ACPI_S2) |
| acpi_slp_type = ACPI_S0; |
| } |
| #endif /* ENV_RAMSTAGE */ |
| |
| void acpi_prepare_for_resume(void) |
| { |
| if (!HIGH_MEMORY_SAVE) |
| return; |
| |
| /* Back up the OS-controlled memory where ramstage will be loaded. */ |
| void *src = (void *)CONFIG_RAMBASE; |
| void *dest = cbmem_find(CBMEM_ID_RESUME); |
| if (dest != NULL) |
| memcpy(dest, src, HIGH_MEMORY_SAVE); |
| } |
| |
| void acpi_prepare_resume_backup(void) |
| { |
| if (!acpi_s3_resume_allowed()) |
| return; |
| |
| /* Let's prepare the ACPI S3 Resume area now already, so we can rely on |
| * it being there during reboot time. We don't need the pointer, nor |
| * the result right now. If it fails, ACPI resume will be disabled. |
| */ |
| |
| if (HIGH_MEMORY_SAVE) |
| cbmem_add(CBMEM_ID_RESUME, HIGH_MEMORY_SAVE); |
| } |
| |
| #define WAKEUP_BASE 0x600 |
| |
| void (*acpi_do_wakeup)(uintptr_t vector, u32 backup_source, u32 backup_target, |
| u32 backup_size) asmlinkage = (void *)WAKEUP_BASE; |
| |
| extern unsigned char __wakeup; |
| extern unsigned int __wakeup_size; |
| |
| static void acpi_jump_to_wakeup(void *vector) |
| { |
| uintptr_t acpi_backup_memory = 0; |
| |
| if (!acpi_s3_resume_allowed()) { |
| printk(BIOS_WARNING, "ACPI: S3 resume not allowed.\n"); |
| return; |
| } |
| |
| if (HIGH_MEMORY_SAVE) { |
| acpi_backup_memory = (uintptr_t)cbmem_find(CBMEM_ID_RESUME); |
| |
| if (!acpi_backup_memory) { |
| printk(BIOS_WARNING, "ACPI: Backup memory missing. " |
| "No S3 resume.\n"); |
| return; |
| } |
| } |
| |
| /* Copy wakeup trampoline in place. */ |
| memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size); |
| |
| timestamp_add_now(TS_ACPI_WAKE_JUMP); |
| |
| acpi_do_wakeup((uintptr_t)vector, acpi_backup_memory, CONFIG_RAMBASE, |
| HIGH_MEMORY_SAVE); |
| } |
| |
| void __attribute__((weak)) mainboard_suspend_resume(void) |
| { |
| } |
| |
| void acpi_resume(void *wake_vec) |
| { |
| #if CONFIG_HAVE_SMI_HANDLER |
| u32 *gnvs_address = cbmem_find(CBMEM_ID_ACPI_GNVS_PTR); |
| |
| /* Restore GNVS pointer in SMM if found */ |
| if (gnvs_address && *gnvs_address) { |
| printk(BIOS_DEBUG, "Restore GNVS pointer to 0x%08x\n", |
| *gnvs_address); |
| smm_setup_structures((void *)*gnvs_address, NULL, NULL); |
| } |
| #endif |
| |
| /* Call mainboard resume handler first, if defined. */ |
| mainboard_suspend_resume(); |
| |
| post_code(POST_OS_RESUME); |
| acpi_jump_to_wakeup(wake_vec); |
| } |