diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/acpi_s3.h | 18 | ||||
| -rw-r--r-- | arch/x86/lib/fsp/fsp_common.c | 26 |
2 files changed, 43 insertions, 1 deletions
diff --git a/arch/x86/include/asm/acpi_s3.h b/arch/x86/include/asm/acpi_s3.h index 78c53ea2fb..ec052112f3 100644 --- a/arch/x86/include/asm/acpi_s3.h +++ b/arch/x86/include/asm/acpi_s3.h @@ -61,4 +61,22 @@ static inline enum acpi_sleep_state acpi_sleep_from_pm1(u32 pm1_cnt) return -EINVAL; } +/** + * chipset_prev_sleep_state() - Get chipset previous sleep state + * + * This returns chipset previous sleep state from ACPI registers. + * Platform codes must supply this routine in order to support ACPI S3. + * + * @return ACPI_S0/S1/S2/S3/S4/S5. + */ +enum acpi_sleep_state chipset_prev_sleep_state(void); + +/** + * chipset_clear_sleep_state() - Clear chipset sleep state + * + * This clears chipset sleep state in ACPI registers. + * Platform codes must supply this routine in order to support ACPI S3. + */ +void chipset_clear_sleep_state(void); + #endif /* __ASM_ACPI_S3_H__ */ diff --git a/arch/x86/lib/fsp/fsp_common.c b/arch/x86/lib/fsp/fsp_common.c index 66a388d601..cc42cad20b 100644 --- a/arch/x86/lib/fsp/fsp_common.c +++ b/arch/x86/lib/fsp/fsp_common.c @@ -6,6 +6,7 @@ #include <common.h> #include <errno.h> +#include <asm/acpi_s3.h> #include <asm/io.h> #include <asm/mrccache.h> #include <asm/post.h> @@ -78,6 +79,10 @@ static __maybe_unused void *fsp_prepare_mrc_cache(void) int arch_fsp_init(void) { void *nvs; + int boot_mode = BOOT_FULL_CONFIG; +#ifdef CONFIG_HAVE_ACPI_RESUME + int prev_sleep_state = chipset_prev_sleep_state(); +#endif if (!gd->arch.hob_list) { #ifdef CONFIG_ENABLE_MRC_CACHE @@ -85,12 +90,31 @@ int arch_fsp_init(void) #else nvs = NULL; #endif + +#ifdef CONFIG_HAVE_ACPI_RESUME + if (prev_sleep_state == ACPI_S3) { + if (nvs == NULL) { + /* If waking from S3 and no cache then */ + debug("No MRC cache found in S3 resume path\n"); + post_code(POST_RESUME_FAILURE); + /* Clear Sleep Type */ + chipset_clear_sleep_state(); + /* Reboot */ + debug("Rebooting..\n"); + reset_cpu(0); + /* Should not reach here.. */ + panic("Reboot System"); + } + + boot_mode = BOOT_ON_S3_RESUME; + } +#endif /* * The first time we enter here, call fsp_init(). * Note the execution does not return to this function, * instead it jumps to fsp_continue(). */ - fsp_init(CONFIG_FSP_TEMP_RAM_ADDR, BOOT_FULL_CONFIG, nvs); + fsp_init(CONFIG_FSP_TEMP_RAM_ADDR, boot_mode, nvs); } else { /* * The second time we enter here, adjust the size of malloc() |