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-rw-r--r--src/soc/amd/picasso/Kconfig12
-rw-r--r--src/soc/amd/picasso/Makefile.inc1
-rw-r--r--src/soc/amd/picasso/include/soc/mrc_cache.h9
-rw-r--r--src/soc/amd/picasso/mrc_cache.c175
-rw-r--r--src/soc/amd/picasso/romstage.c4
5 files changed, 189 insertions, 12 deletions
diff --git a/src/soc/amd/picasso/Kconfig b/src/soc/amd/picasso/Kconfig
index e3d145d80f..5ba0c1b2e0 100644
--- a/src/soc/amd/picasso/Kconfig
+++ b/src/soc/amd/picasso/Kconfig
@@ -53,7 +53,6 @@ config CPU_SPECIFIC_OPTIONS
select FSP_COMPRESS_FSP_S_LZMA
select FSP_USES_CB_STACK
select UDK_2017_BINDING
- select CACHE_MRC_SETTINGS
select HAVE_CF9_RESET
config PRERAM_CBMEM_CONSOLE_SIZE
@@ -303,17 +302,6 @@ config PSP_APOB_DRAM_ADDRESS
Location in DRAM where the PSP will copy the AGESA PSP Output
Block.
-# This value is currently the same as the default defined in
-# drivers/mrc_cache/Kconfig. We do this in in case the default
-# changes. The PSP requires this value to be 64KiB.
-config MRC_SETTINGS_CACHE_SIZE
- hex
- default 0x10000
- help
- Size of flash area used to save APOB NV data which occupies the
- RW_MRC_CACHE region. Make this granularity the flash device can
- erase.
-
config USE_PSPSCUREOS
bool
default y
diff --git a/src/soc/amd/picasso/Makefile.inc b/src/soc/amd/picasso/Makefile.inc
index 3b59684f18..8012f973a0 100644
--- a/src/soc/amd/picasso/Makefile.inc
+++ b/src/soc/amd/picasso/Makefile.inc
@@ -31,6 +31,7 @@ romstage-y += southbridge.c
romstage-$(CONFIG_HAVE_SMI_HANDLER) += smi_util.c
romstage-y += psp.c
romstage-y += config.c
+romstage-y += mrc_cache.c
verstage-y += gpio.c
verstage-y += i2c.c
diff --git a/src/soc/amd/picasso/include/soc/mrc_cache.h b/src/soc/amd/picasso/include/soc/mrc_cache.h
new file mode 100644
index 0000000000..ed63ba86fb
--- /dev/null
+++ b/src/soc/amd/picasso/include/soc/mrc_cache.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __PICASSO_MRC_CACHE_H__
+#define __PICASSO_MRC_CACHE_H__
+
+void *soc_fill_mrc_cache(void);
+void soc_update_mrc_cache(void);
+
+#endif /* __PICASSO_MRC_CACHE_H__ */
diff --git a/src/soc/amd/picasso/mrc_cache.c b/src/soc/amd/picasso/mrc_cache.c
new file mode 100644
index 0000000000..ad0d964947
--- /dev/null
+++ b/src/soc/amd/picasso/mrc_cache.c
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <acpi/acpi.h>
+#include <assert.h>
+#include <boot_device.h>
+#include <bootstate.h>
+#include <commonlib/region.h>
+#include <console/console.h>
+#include <fmap.h>
+#include <soc/mrc_cache.h>
+#include <spi_flash.h>
+#include <stdint.h>
+#include <string.h>
+
+#define DEFAULT_MRC_CACHE "RW_MRC_CACHE"
+/* PSP requires this value to be 64KiB */
+#define DEFAULT_MRC_CACHE_SIZE 0x10000
+
+#if !CONFIG_PSP_APOB_DRAM_ADDRESS
+#error Incorrect APOB configuration setting(s)
+#endif
+
+#define APOB_SIGNATURE 0x424F5041 /* 'APOB' */
+
+/* APOB_BASE_HEADER from AGESA */
+struct apob_base_header {
+ uint32_t signature; /* APOB signature */
+ uint32_t version; /* Version */
+ uint32_t size; /* APOB Size */
+ uint32_t offset_of_first_entry; /* APOB Header Size */
+};
+
+static bool apob_header_valid(const struct apob_base_header *apob_header_ptr, const char *where)
+{
+ if (apob_header_ptr->signature != APOB_SIGNATURE) {
+ printk(BIOS_WARNING, "Invalid %s APOB signature %x\n",
+ where, apob_header_ptr->signature);
+ return false;
+ }
+
+ if (apob_header_ptr->size == 0 || apob_header_ptr->size > DEFAULT_MRC_CACHE_SIZE) {
+ printk(BIOS_WARNING, "%s APOB data is too large %x > %x\n",
+ where, apob_header_ptr->size, DEFAULT_MRC_CACHE_SIZE);
+ return false;
+ }
+
+ return true;
+}
+
+static void *get_apob_dram_address(void)
+{
+ /*
+ * TODO: Find the APOB destination by parsing the PSP's tables
+ * (once vboot is implemented).
+ */
+ void *apob_src_ram = (void *)(uintptr_t)CONFIG_PSP_APOB_DRAM_ADDRESS;
+
+ if (apob_header_valid(apob_src_ram, "RAM") == false)
+ return NULL;
+
+ return apob_src_ram;
+}
+
+static int get_nv_region(struct region *r)
+{
+ if (fmap_locate_area(DEFAULT_MRC_CACHE, r) < 0) {
+ printk(BIOS_ERR, "Error: No APOB NV region is found in flash\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static void *get_apob_from_nv_region(struct region *region)
+{
+ struct region_device read_rdev;
+ struct apob_base_header apob_header;
+
+ if (boot_device_ro_subregion(region, &read_rdev) < 0) {
+ printk(BIOS_ERR, "Failed boot_device_ro_subregion\n");
+ return NULL;
+ }
+
+ if (rdev_readat(&read_rdev, &apob_header, 0, sizeof(apob_header)) < 0) {
+ printk(BIOS_ERR, "Couldn't read APOB header!\n");
+ return NULL;
+ }
+
+ if (apob_header_valid(&apob_header, "ROM") == false) {
+ printk(BIOS_ERR, "No APOB NV data!\n");
+ return NULL;
+ }
+
+ assert(CONFIG(BOOT_DEVICE_MEMORY_MAPPED));
+ return rdev_mmap_full(&read_rdev);
+}
+
+/* Save APOB buffer to flash */
+void soc_update_mrc_cache(void)
+{
+ struct apob_base_header *apob_rom;
+ struct region_device write_rdev;
+ struct region region;
+ bool update_needed = false;
+ const struct apob_base_header *apob_src_ram;
+
+ /* Nothing to update in case of S3 resume. */
+ if (acpi_is_wakeup_s3())
+ return;
+
+ apob_src_ram = get_apob_dram_address();
+ if (apob_src_ram == NULL)
+ return;
+
+ if (get_nv_region(&region) != 0)
+ return;
+
+ apob_rom = get_apob_from_nv_region(&region);
+ if (apob_rom == NULL) {
+ update_needed = true;
+ } else if (memcmp(apob_src_ram, apob_rom, apob_src_ram->size)) {
+ printk(BIOS_INFO, "APOB RAM copy differs from flash\n");
+ update_needed = true;
+ } else
+ printk(BIOS_DEBUG, "APOB valid copy is already in flash\n");
+
+ if (!update_needed)
+ return;
+
+ printk(BIOS_SPEW, "Copy APOB from RAM 0x%p/0x%x to flash 0x%zx/0x%zx\n",
+ apob_src_ram, apob_src_ram->size,
+ region_offset(&region), region_sz(&region));
+
+ if (boot_device_rw_subregion(&region, &write_rdev) < 0) {
+ printk(BIOS_ERR, "Failed boot_device_rw_subregion\n");
+ return;
+ }
+
+ /* write data to flash region */
+ if (rdev_eraseat(&write_rdev, 0, DEFAULT_MRC_CACHE_SIZE) < 0) {
+ printk(BIOS_ERR, "Error: APOB flash region erase failed\n");
+ return;
+ }
+
+ if (rdev_writeat(&write_rdev, apob_src_ram, 0, apob_src_ram->size) < 0) {
+ printk(BIOS_ERR, "Error: APOB flash region update failed\n");
+ return;
+ }
+
+ printk(BIOS_INFO, "Updated APOB in flash\n");
+}
+
+static void *get_apob_nv_address(void)
+{
+ struct region region;
+
+ if (get_nv_region(&region) != 0)
+ return NULL;
+
+ return get_apob_from_nv_region(&region);
+}
+
+void *soc_fill_mrc_cache(void)
+{
+ /* If this is non-S3 boot, then use the APOB data placed by PSP in DRAM. */
+ if (!acpi_is_wakeup_s3())
+ return get_apob_dram_address();
+
+ /*
+ * In case of S3 resume, PSP does not copy APOB data to DRAM. Thus, coreboot needs to
+ * provide the APOB NV data from RW_MRC_CACHE on SPI flash so that FSP can use it
+ * without having to traverse the BIOS directory table.
+ */
+ return get_apob_nv_address();
+}
diff --git a/src/soc/amd/picasso/romstage.c b/src/soc/amd/picasso/romstage.c
index 35d2aa2b46..5416e8ac5b 100644
--- a/src/soc/amd/picasso/romstage.c
+++ b/src/soc/amd/picasso/romstage.c
@@ -12,6 +12,7 @@
#include <program_loading.h>
#include <elog.h>
#include <soc/romstage.h>
+#include <soc/mrc_cache.h>
#include <types.h>
#include "chip.h"
#include <fsp/api.h>
@@ -26,6 +27,8 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version)
FSP_M_CONFIG *mcfg = &mupd->FspmConfig;
const config_t *config = config_of_soc();
+ mupd->FspmArchUpd.NvsBufferPtr = soc_fill_mrc_cache();
+
mcfg->pci_express_base_addr = CONFIG_MMCONF_BASE_ADDRESS;
mcfg->tseg_size = CONFIG_SMM_TSEG_SIZE;
mcfg->serial_port_base = uart_platform_base(CONFIG_UART_FOR_CONSOLE);
@@ -85,6 +88,7 @@ asmlinkage void car_stage_entry(void)
post_code(0x43);
fsp_memory_init(s3_resume);
+ soc_update_mrc_cache();
post_code(0x44);
run_ramstage();
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-03 04:23:40 +0000