[S] Change in coreboot[main]: drivers/intel/fsp2_0: Add boot mode strings

[Shelley Chen (Code Review)]

Shelley Chen has submitted this change. ( https://review.coreboot.org/c/coreboot/+/78683?usp=email )

Change subject: drivers/intel/fsp2_0: Add boot mode strings
......................................................................

drivers/intel/fsp2_0: Add boot mode strings

The FSP boot mode showing in serial log is a magic number.
In order to let user understand its meaning directly, add
the strings to describe the modes.

TEST=build, boot the device and check the logs:
without this change, the log is like:
[SPEW ]  bootmode is set to: 2
with this change:
[SPEW ]  bootmode is set to: 2 (boot assuming no config change)

Change-Id: I49a409edcde7f6ccb95eafb0b250f86329817cba
Signed-off-by: Marx Wang 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78683
Tested-by: build bot (Jenkins) 
Reviewed-by: Eric Lai 
Reviewed-by: Kapil Porwal 
Reviewed-by: Subrata Banik 
---
M src/drivers/intel/fsp2_0/memory_init.c
1 file changed, 16 insertions(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Subrata Banik: Looks good to me, approved
  Kapil Porwal: Looks good to me, but someone else must approve
  Eric Lai: Looks good to me, but someone else must approve

diff --git a/src/drivers/intel/fsp2_0/memory_init.c b/src/drivers/intel/fsp2_0/memory_init.c
index d0ddeaf..f5de5c3 100644
--- a/src/drivers/intel/fsp2_0/memory_init.c
+++ b/src/drivers/intel/fsp2_0/memory_init.c
@@ -160,6 +160,16 @@
     * and are not related to FSP stack at all.
     * Non-CAR FSP 2.0 platforms pass a DRAM location for the FSP stack.
     */
+	static const char * const fsp_bootmode_strings[] = {
+		[FSP_BOOT_WITH_FULL_CONFIGURATION] = "boot with full config",
+		[FSP_BOOT_WITH_MINIMAL_CONFIGURATION] = "boot with minimal config",
+		[FSP_BOOT_ASSUMING_NO_CONFIGURATION_CHANGES] = "boot assuming no config change",
+		[FSP_BOOT_ON_S4_RESUME] = "boot on s4 resume",
+		[FSP_BOOT_ON_S3_RESUME] = "boot on s3 resume",
+		[FSP_BOOT_ON_FLASH_UPDATE] = "boot on flash update",
+		[FSP_BOOT_IN_RECOVERY_MODE] = "boot in recovery mode",
+	};
+
    if (CONFIG(FSP_USES_CB_STACK) || !ENV_CACHE_AS_RAM) {
    	arch_upd->StackBase = (uintptr_t)temp_ram;
    	arch_upd->StackSize = sizeof(temp_ram);
@@ -180,7 +190,12 @@
    		arch_upd->BootMode = FSP_BOOT_WITH_FULL_CONFIGURATION;
    }

-	printk(BIOS_SPEW, "bootmode is set to: %d\n", arch_upd->BootMode);
+	if (arch_upd->BootMode < ARRAY_SIZE(fsp_bootmode_strings) &&
+		fsp_bootmode_strings[arch_upd->BootMode] != NULL)
+		printk(BIOS_SPEW, "bootmode is set to: %d (%s)\n", arch_upd->BootMode,
+			fsp_bootmode_strings[arch_upd->BootMode]);
+	else
+		printk(BIOS_SPEW, "bootmode is set to: %d (unknown mode)\n", arch_upd->BootMode);

return CB_SUCCESS;
 }