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/*
* 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 0;
} else if (handoff->s3_resume) {
printk(BIOS_DEBUG, "S3 Resume.\n");
return 3;
} else {
printk(BIOS_DEBUG, "Normal boot.\n");
return 0;
}
}
#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 == 3 || acpi_slp_type == 2);
}
int acpi_is_wakeup_s3(void)
{
acpi_handoff_wakeup();
return (acpi_slp_type == 3);
}
int acpi_is_wakeup_s4(void)
{
acpi_handoff_wakeup();
return (acpi_slp_type == 4);
}
void acpi_fail_wakeup(void)
{
if (acpi_slp_type == 3 || acpi_slp_type == 2)
acpi_slp_type = 0;
}
#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);
}
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