| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <console/console.h> |
| #include <string.h> |
| #include <acpi/acpi.h> |
| #include <arch/cpu.h> |
| #include <commonlib/helpers.h> |
| #include <cpu/x86/smm.h> |
| #include <fallback.h> |
| #include <timestamp.h> |
| #include <romstage_handoff.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); |
| } |
| |
| #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; |
| |
| void __weak mainboard_suspend_resume(void) |
| { |
| } |
| |
| void __noreturn acpi_resume(void *wake_vec) |
| { |
| /* Restore GNVS pointer in SMM if found. */ |
| apm_control(APM_CNT_GNVS_UPDATE); |
| |
| /* Call mainboard resume handler first, if defined. */ |
| mainboard_suspend_resume(); |
| |
| /* Copy wakeup trampoline in place. */ |
| memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size); |
| |
| set_boot_successful(); |
| |
| timestamp_add_now(TS_ACPI_WAKE_JUMP); |
| |
| post_code(POST_OS_RESUME); |
| acpi_do_wakeup((uintptr_t)wake_vec); |
| |
| die("Failed the jump to wakeup vector\n"); |
| } |