soc/amd: move vboot-on-PSP-related functions to common/vboot
Change-Id: I4f07d3ab12116229a13d2e8c02b2deb06e51a1af
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47976
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/soc/amd/common/vboot/vboot_bootblock.c b/src/soc/amd/common/vboot/vboot_bootblock.c
index 3fbc4ef..45ad9de 100644
--- a/src/soc/amd/common/vboot/vboot_bootblock.c
+++ b/src/soc/amd/common/vboot/vboot_bootblock.c
@@ -2,13 +2,23 @@
#include <amdblocks/reset.h>
#include <bl_uapp/bl_syscall_public.h>
+#include <bootblock_common.h>
#include <console/console.h>
#include <pc80/mc146818rtc.h>
#include <security/vboot/vbnv.h>
#include <security/vboot/symbols.h>
#include <soc/psp_transfer.h>
+#include <timestamp.h>
#include <2struct.h>
+static int transfer_buffer_valid(const struct transfer_info_struct *ptr)
+{
+ if (ptr->magic_val == TRANSFER_MAGIC_VAL)
+ return 1;
+ else
+ return 0;
+}
+
void verify_psp_transfer_buf(void)
{
if (*(uint32_t *)_vboot2_work == VB2_SHARED_DATA_MAGIC) {
@@ -51,3 +61,43 @@
"Production" : "Pre-Production");
}
}
+
+void boot_with_psp_timestamp(uint64_t base_timestamp)
+{
+ const struct transfer_info_struct *info = (const struct transfer_info_struct *)
+ (void *)(uintptr_t)_transfer_buffer;
+
+ if (!transfer_buffer_valid(info) || info->timestamp == 0)
+ return;
+
+ /*
+ * info->timestamp is PSP's timestamp (in microseconds)
+ * when x86 processor is released.
+ */
+ uint64_t psp_last_ts = info->timestamp;
+
+ int i;
+ struct timestamp_table *psp_ts_table =
+ (struct timestamp_table *)(void *)
+ ((uintptr_t)_transfer_buffer + info->timestamp_offset);
+ /* new base_timestamp will be offset for all PSP timestamps. */
+ base_timestamp -= psp_last_ts;
+
+ for (i = 0; i < psp_ts_table->num_entries; i++) {
+ struct timestamp_entry *tse = &psp_ts_table->entries[i];
+ /*
+ * We ignore the time between x86 processor release and bootblock.
+ * Since timestamp_add subtracts base_time, we first add old base_time
+ * to make it absolute then add base_timestamp again since
+ * it'll be a new base_time.
+ *
+ * We don't need to convert unit since both PSP and coreboot
+ * will use 1us granularity.
+ *
+ */
+ tse->entry_stamp += psp_ts_table->base_time + base_timestamp;
+ }
+
+ bootblock_main_with_timestamp(base_timestamp, psp_ts_table->entries,
+ psp_ts_table->num_entries);
+}