From 7cd2c073178b6d615199b439ad9a811cfb4dd820 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= Date: Sun, 3 Jun 2018 23:04:28 +0300 Subject: ACPI S3: Depend on RELOCATABLE_RAMSTAGE MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit With RELOCATABLE_RAMSTAGE, S3 resume path only uses memory that is reserved from OS. So there is no need for low memory backup and recovery. Change-Id: If7f83711685ac445abf4cd1aa6b66c3391e0e554 Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/c/coreboot/+/26834 Tested-by: build bot (Jenkins) Reviewed-by: Arthur Heymans Reviewed-by: Aaron Durbin Reviewed-by: Angel Pons --- src/arch/x86/acpi_s3.c | 108 +-------------------------------------- src/arch/x86/include/arch/acpi.h | 1 - src/arch/x86/wakeup.S | 8 --- 3 files changed, 2 insertions(+), 115 deletions(-) (limited to 'src/arch') diff --git a/src/arch/x86/acpi_s3.c b/src/arch/x86/acpi_s3.c index decaf2b5ff..ff9d60c729 100644 --- a/src/arch/x86/acpi_s3.c +++ b/src/arch/x86/acpi_s3.c @@ -70,124 +70,20 @@ void acpi_fail_wakeup(void) } #endif /* ENV_RAMSTAGE */ -struct resume_backup { - uint64_t cbmem; - uint64_t lowmem; - uint64_t size; - uint8_t valid; -}; - -#define BACKUP_PAGE_SZ 4096 - -static int backup_create_or_update(struct resume_backup *backup_mem, - uintptr_t base, size_t size) -{ - uintptr_t top; - - /* Align backup region to complete pages. */ - top = ALIGN_UP(base + size, BACKUP_PAGE_SZ); - base = ALIGN_DOWN(base, BACKUP_PAGE_SZ); - size = top - base; - - /* Cannot extend existing region, should not happen. */ - if (backup_mem && (backup_mem->size < size)) - return -1; - - /* Allocate backup with room for header. */ - if (!backup_mem) { - size_t header_sz = ALIGN_UP(sizeof(*backup_mem), - BACKUP_PAGE_SZ); - backup_mem = cbmem_add(CBMEM_ID_RESUME, header_sz + size); - if (!backup_mem) - return -1; - - /* Container starts from boundary after header. */ - backup_mem->cbmem = (uintptr_t)backup_mem + header_sz; - } - - backup_mem->valid = 0; - backup_mem->lowmem = base; - backup_mem->size = size; - return 0; -} - -void backup_ramstage_section(uintptr_t base, size_t size) -{ - struct resume_backup *backup_mem = cbmem_find(CBMEM_ID_RESUME); - - /* For first boot we exit here as CBMEM_ID_RESUME is only - * created late in ramstage with acpi_prepare_resume_backup(). - */ - if (!backup_mem) - return; - - /* Check that the backup is not done twice. */ - if (backup_mem->valid) - return; - - /* When we are called from ramstage loader, update header with - * properties of the ramstage we will load. - */ - if (backup_create_or_update(backup_mem, base, size) < 0) - return; - - /* Back up the OS-controlled memory where ramstage will be loaded. */ - memcpy((void *)(uintptr_t)backup_mem->cbmem, - (void *)(uintptr_t)backup_mem->lowmem, - (size_t)backup_mem->size); - backup_mem->valid = 1; -} - -/* Let's prepare the ACPI S3 Resume area now already, so we can rely on - * it being there during reboot time. If this fails, ACPI resume will - * be disabled. We assume that ramstage does not change while in suspend, - * so base and size of the currently running ramstage are used - * for allocation. - */ -void acpi_prepare_resume_backup(void) -{ - if (!acpi_s3_resume_allowed()) - return; - - if (CONFIG(RELOCATABLE_RAMSTAGE)) - return; - - backup_create_or_update(NULL, (uintptr_t)_program, - REGION_SIZE(program)); -} - #define WAKEUP_BASE 0x600 -asmlinkage void (*acpi_do_wakeup)(uintptr_t vector, u32 backup_source, - u32 backup_target, u32 backup_size) = (void *)WAKEUP_BASE; +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) { - uintptr_t source = 0, target = 0; - size_t size = 0; - if (!acpi_s3_resume_allowed()) { printk(BIOS_WARNING, "ACPI: S3 resume not allowed.\n"); return; } - if (!CONFIG(RELOCATABLE_RAMSTAGE)) { - struct resume_backup *backup_mem = cbmem_find(CBMEM_ID_RESUME); - if (backup_mem && backup_mem->valid) { - backup_mem->valid = 0; - target = backup_mem->lowmem; - source = backup_mem->cbmem; - size = backup_mem->size; - } else { - printk(BIOS_WARNING, "ACPI: Backup memory missing. " - "No S3 resume.\n"); - return; - } - } - /* Copy wakeup trampoline in place. */ memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size); @@ -195,7 +91,7 @@ static void acpi_jump_to_wakeup(void *vector) timestamp_add_now(TS_ACPI_WAKE_JUMP); - acpi_do_wakeup((uintptr_t)vector, source, target, size); + acpi_do_wakeup((uintptr_t)vector); } void __weak mainboard_suspend_resume(void) diff --git a/src/arch/x86/include/arch/acpi.h b/src/arch/x86/include/arch/acpi.h index 670948a1d1..16e4269dde 100644 --- a/src/arch/x86/include/arch/acpi.h +++ b/src/arch/x86/include/arch/acpi.h @@ -934,7 +934,6 @@ unsigned long acpi_create_hest_error_source(acpi_hest_t *hest, /* For ACPI S3 support. */ void acpi_fail_wakeup(void); void acpi_resume(void *wake_vec); -void acpi_prepare_resume_backup(void); void mainboard_suspend_resume(void); void *acpi_find_wakeup_vector(void); diff --git a/src/arch/x86/wakeup.S b/src/arch/x86/wakeup.S index ba502fefa5..1362eb4a18 100644 --- a/src/arch/x86/wakeup.S +++ b/src/arch/x86/wakeup.S @@ -64,14 +64,6 @@ __wakeup: shr $4, %eax movw %ax, (__wakeup_segment) - /* Then overwrite coreboot with our backed up memory */ - cld - movl 8(%esp), %esi - movl 12(%esp), %edi - movl 16(%esp), %ecx - shrl $2, %ecx - rep movsl - /* Activate the right segment descriptor real mode. */ ljmp $0x28, $RELOCATED(1f) 1: -- cgit v1.2.3