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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <console/console.h>
#include <string.h>
#include <acpi/acpi.h>
#include <arch/cpu.h>
#include <cbmem.h>
#include <commonlib/helpers.h>
#include <fallback.h>
#include <timestamp.h>
#include <program_loading.h>
#include <romstage_handoff.h>
#include <symbols.h>
#include <cpu/x86/smm.h>
#if ENV_RAMSTAGE || ENV_POSTCAR
/* This is filled with acpi_is_wakeup() call early in ramstage. */
static int acpi_slp_type = -1;
static void acpi_handoff_wakeup(void)
{
if (acpi_slp_type < 0) {
if (romstage_handoff_is_resume()) {
printk(BIOS_DEBUG, "S3 Resume\n");
acpi_slp_type = ACPI_S3;
} else {
printk(BIOS_DEBUG, "Normal boot\n");
acpi_slp_type = ACPI_S0;
}
}
}
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);
}
#endif /* ENV_RAMSTAGE */
#define WAKEUP_BASE 0x600
asmlinkage void (*acpi_do_wakeup)(uintptr_t vector) = (void *)WAKEUP_BASE;
extern unsigned char __wakeup;
extern unsigned int __wakeup_size;
static void acpi_jump_to_wakeup(void *vector)
{
if (!acpi_s3_resume_allowed()) {
printk(BIOS_WARNING, "ACPI: S3 resume not allowed.\n");
return;
}
/* Copy wakeup trampoline in place. */
memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size);
set_boot_successful();
timestamp_add_now(TS_ACPI_WAKE_JUMP);
acpi_do_wakeup((uintptr_t)vector);
}
void __weak mainboard_suspend_resume(void)
{
}
void acpi_resume(void *wake_vec)
{
if (CONFIG(HAVE_SMI_HANDLER)) {
void *gnvs_address = cbmem_find(CBMEM_ID_ACPI_GNVS);
/* Restore GNVS pointer in SMM if found */
if (gnvs_address) {
printk(BIOS_DEBUG, "Restore GNVS pointer to %p\n",
gnvs_address);
smm_setup_structures(gnvs_address, NULL, NULL);
}
}
/* 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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