diff options
| -rw-r--r-- | src/Kconfig | 13 | ||||
| -rw-r--r-- | src/arch/x86/acpi_s3.c | 137 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/acpi.h | 12 | ||||
| -rw-r--r-- | src/cpu/amd/agesa/Kconfig | 1 | ||||
| -rw-r--r-- | src/cpu/amd/car/post_cache_as_ram.c | 4 | ||||
| -rw-r--r-- | src/cpu/amd/pi/Kconfig | 1 | ||||
| -rw-r--r-- | src/include/cbfs.h | 3 | ||||
| -rw-r--r-- | src/include/program_loading.h | 4 | ||||
| -rw-r--r-- | src/lib/cbfs.c | 12 | ||||
| -rw-r--r-- | src/lib/prog_loaders.c | 14 |
10 files changed, 175 insertions, 26 deletions
diff --git a/src/Kconfig b/src/Kconfig index d6af6ebacd..d6ada63548 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -539,6 +539,19 @@ config HAVE_ACPI_RESUME bool default n +config ACPI_TINY_LOWMEM_BACKUP + bool + default n + help + On S3 resume path, backup only the region of low memory ramstage + will occupy. Requires platform places romstage ramstack in CBMEM. + +config ACPI_HUGE_LOWMEM_BACKUP + bool + default !ACPI_TINY_LOWMEM_BACKUP + help + On S3 resume path, backup low memory from RAMBASE..RAMTOP in CBMEM. + config RESUME_PATH_SAME_AS_BOOT bool default y if ARCH_X86 diff --git a/src/arch/x86/acpi_s3.c b/src/arch/x86/acpi_s3.c index c327cbd93a..ffec64d03a 100644 --- a/src/arch/x86/acpi_s3.c +++ b/src/arch/x86/acpi_s3.c @@ -19,8 +19,10 @@ #include <cbmem.h> #include <cpu/cpu.h> #include <timestamp.h> +#include <program_loading.h> #include <romstage_handoff.h> #include <rules.h> +#include <symbols.h> #if ENV_RAMSTAGE @@ -79,30 +81,125 @@ 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; + + if (IS_ENABLED(CONFIG_ACPI_HUGE_LOWMEM_BACKUP)) { + base = CONFIG_RAMBASE; + size = HIGH_MEMORY_SAVE; + } + + /* 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 *acpi_backup_container(uintptr_t base, size_t size) +{ + struct resume_backup *backup_mem = cbmem_find(CBMEM_ID_RESUME); + if (!backup_mem) + return NULL; + + if (!IS_ALIGNED(base, BACKUP_PAGE_SZ) || !IS_ALIGNED(size, BACKUP_PAGE_SZ)) + return NULL; + + if (backup_create_or_update(backup_mem, base, size) < 0) + return NULL; + + backup_mem->valid = 1; + return (void*)(uintptr_t)backup_mem->cbmem; +} + +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; +} + +/* Make backup of low-memory region, relying on the base and size + * of the ramstage that was loaded before entry to ACPI S3. + * + * DEPRECATED + */ void acpi_prepare_for_resume(void) { - if (!HIGH_MEMORY_SAVE) + struct resume_backup *backup_mem = cbmem_find(CBMEM_ID_RESUME); + if (!backup_mem) 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); + 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; - /* 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 (IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE)) + return; - if (HIGH_MEMORY_SAVE) - cbmem_add(CBMEM_ID_RESUME, HIGH_MEMORY_SAVE); + backup_create_or_update(NULL, (uintptr_t)_program, _program_size); } #define WAKEUP_BASE 0x600 @@ -115,17 +212,22 @@ extern unsigned int __wakeup_size; static void acpi_jump_to_wakeup(void *vector) { - uintptr_t acpi_backup_memory = 0; + 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 (HIGH_MEMORY_SAVE) { - acpi_backup_memory = (uintptr_t)cbmem_find(CBMEM_ID_RESUME); - - if (!acpi_backup_memory) { + if (!IS_ENABLED(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; @@ -137,8 +239,7 @@ static void acpi_jump_to_wakeup(void *vector) timestamp_add_now(TS_ACPI_WAKE_JUMP); - acpi_do_wakeup((uintptr_t)vector, acpi_backup_memory, CONFIG_RAMBASE, - HIGH_MEMORY_SAVE); + acpi_do_wakeup((uintptr_t)vector, source, target, size); } void __attribute__((weak)) mainboard_suspend_resume(void) diff --git a/src/arch/x86/include/arch/acpi.h b/src/arch/x86/include/arch/acpi.h index 7fc1c50310..7c296480bc 100644 --- a/src/arch/x86/include/arch/acpi.h +++ b/src/arch/x86/include/arch/acpi.h @@ -25,12 +25,7 @@ #ifndef __ASM_ACPI_H #define __ASM_ACPI_H -#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) && \ - ! IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE) #define HIGH_MEMORY_SAVE (CONFIG_RAMTOP - CONFIG_RAMBASE) -#else -#define HIGH_MEMORY_SAVE 0 -#endif #if IS_ENABLED(CONFIG_ACPI_INTEL_HARDWARE_SLEEP_VALUES) /* @@ -688,6 +683,13 @@ static inline int acpi_s3_resume_allowed(void) return IS_ENABLED(CONFIG_HAVE_ACPI_RESUME); } +/* Return address in reserved memory where to backup low memory + * while platform resumes from S3 suspend. Caller is responsible of + * making a complete copy of the region base..base+size, with + * parameteres base and size that meet page alignment requirement. + */ +void *acpi_backup_container(uintptr_t base, size_t size); + #if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) extern int acpi_slp_type; diff --git a/src/cpu/amd/agesa/Kconfig b/src/cpu/amd/agesa/Kconfig index ae5e8549df..7fe24cebb9 100644 --- a/src/cpu/amd/agesa/Kconfig +++ b/src/cpu/amd/agesa/Kconfig @@ -31,6 +31,7 @@ config CPU_AMD_AGESA select UDELAY_LAPIC select LAPIC_MONOTONIC_TIMER select SPI_FLASH if HAVE_ACPI_RESUME + select ACPI_TINY_LOWMEM_BACKUP if CPU_AMD_AGESA diff --git a/src/cpu/amd/car/post_cache_as_ram.c b/src/cpu/amd/car/post_cache_as_ram.c index 19aa0a2fe6..296adc9869 100644 --- a/src/cpu/amd/car/post_cache_as_ram.c +++ b/src/cpu/amd/car/post_cache_as_ram.c @@ -69,7 +69,7 @@ static void prepare_romstage_ramstack(int s3resume) print_car_debug("Prepare CAR migration and stack regions..."); if (s3resume) { - void *resume_backup_memory = cbmem_find(CBMEM_ID_RESUME); + void *resume_backup_memory = acpi_backup_container(CONFIG_RAMBASE, HIGH_MEMORY_SAVE); if (resume_backup_memory) memcpy_(resume_backup_memory + HIGH_MEMORY_SAVE - backup_top, (void *)(CONFIG_RAMTOP - backup_top), backup_top); @@ -85,7 +85,7 @@ static void prepare_ramstage_region(int s3resume) print_car_debug("Prepare ramstage memory region..."); if (s3resume) { - void *resume_backup_memory = cbmem_find(CBMEM_ID_RESUME); + void *resume_backup_memory = acpi_backup_container(CONFIG_RAMBASE, HIGH_MEMORY_SAVE); if (resume_backup_memory) memcpy_(resume_backup_memory, (void *) CONFIG_RAMBASE, HIGH_MEMORY_SAVE - backup_top); diff --git a/src/cpu/amd/pi/Kconfig b/src/cpu/amd/pi/Kconfig index ed379ea351..203fa03b6d 100644 --- a/src/cpu/amd/pi/Kconfig +++ b/src/cpu/amd/pi/Kconfig @@ -28,6 +28,7 @@ config CPU_AMD_PI select UDELAY_LAPIC select LAPIC_MONOTONIC_TIMER select SPI_FLASH if HAVE_ACPI_RESUME + select ACPI_TINY_LOWMEM_BACKUP if CPU_AMD_PI diff --git a/src/include/cbfs.h b/src/include/cbfs.h index 6063dd6f9e..8538b3d119 100644 --- a/src/include/cbfs.h +++ b/src/include/cbfs.h @@ -47,6 +47,9 @@ size_t cbfs_boot_load_struct(const char *name, void *buf, size_t buf_size); size_t cbfs_load_and_decompress(const struct region_device *rdev, size_t offset, size_t in_size, void *buffer, size_t buffer_size, uint32_t compression); +/* Return the size and fill base of the memory pstage will occupy after loaded. */ +size_t cbfs_prog_stage_section(struct prog *pstage, uintptr_t *base); + /* Load stage into memory filling in prog. Return 0 on success. < 0 on error. */ int cbfs_prog_stage_load(struct prog *prog); diff --git a/src/include/program_loading.h b/src/include/program_loading.h index 08687f3128..416e2e9418 100644 --- a/src/include/program_loading.h +++ b/src/include/program_loading.h @@ -173,6 +173,10 @@ uintptr_t romstage_ram_stack_base(size_t size, int src); uintptr_t romstage_ram_stack_top(void); uintptr_t romstage_ram_stack_bottom(void); +/* Backup OS memory to CBMEM_ID_RESUME on ACPI S3 resume path, + * if ramstage overwrites low memory. */ +void backup_ramstage_section(uintptr_t base, size_t size); + /*********************** * PAYLOAD LOADING * ***********************/ diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c index 5a2f63f95d..19737a4192 100644 --- a/src/lib/cbfs.c +++ b/src/lib/cbfs.c @@ -187,6 +187,18 @@ size_t cbfs_boot_load_struct(const char *name, void *buf, size_t buf_size) buf, buf_size, compression_algo); } +size_t cbfs_prog_stage_section(struct prog *pstage, uintptr_t *base) +{ + struct cbfs_stage stage; + const struct region_device *fh = prog_rdev(pstage); + + if (rdev_readat(fh, &stage, 0, sizeof(stage)) != sizeof(stage)) + return 0; + + *base = (uintptr_t)stage.load; + return stage.memlen; +} + int cbfs_prog_stage_load(struct prog *pstage) { struct cbfs_stage stage; diff --git a/src/lib/prog_loaders.c b/src/lib/prog_loaders.c index 09933ae70c..3a6f2e26a5 100644 --- a/src/lib/prog_loaders.c +++ b/src/lib/prog_loaders.c @@ -110,6 +110,18 @@ static int load_relocatable_ramstage(struct prog *ramstage) return rmodule_stage_load(&rmod_ram); } +static int load_nonrelocatable_ramstage(struct prog *ramstage) +{ + if (IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)) { + uintptr_t base = 0; + size_t size = cbfs_prog_stage_section(ramstage, &base); + if (size) + backup_ramstage_section(base, size); + } + + return cbfs_prog_stage_load(ramstage); +} + void run_ramstage(void) { struct prog ramstage = @@ -135,7 +147,7 @@ void run_ramstage(void) if (IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE)) { if (load_relocatable_ramstage(&ramstage)) goto fail; - } else if (cbfs_prog_stage_load(&ramstage)) + } else if (load_nonrelocatable_ramstage(&ramstage)) goto fail; stage_cache_add(STAGE_RAMSTAGE, &ramstage); |