soc/amd/cezanne,vc/cezanne: Implement svc_write_postcode
This will allow verstage to write post codes.
BUG=b:215425753
TEST=Boot guybrush and verify PSP post codes are printed
22-01-31 15:12:03.214 (S3->S0)
22-01-31 15:12:03.214 03 04 0f 0e f0 f1 f2 01 10 a0 a2 <--new
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I6ceee8fcb094f462de99c07aef8e96425d9c3270
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61522
Reviewed-by: Kangheui Won <khwon@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/amd/cezanne/psp_verstage/chipset.c b/src/soc/amd/cezanne/psp_verstage/chipset.c
index 30f613a..41d318e 100644
--- a/src/soc/amd/cezanne/psp_verstage/chipset.c
+++ b/src/soc/amd/cezanne/psp_verstage/chipset.c
@@ -40,13 +40,3 @@
else
svc_set_platform_boot_mode(CHROME_BOOK_BOOT_MODE_PRODUCTION);
}
-
-
-/* Functions below are stub functions for not-yet-implemented PSP features.
- * These functions should be replaced with proper implementations later.
- */
-
-uint32_t svc_write_postcode(uint32_t postcode)
-{
- return 0;
-}
diff --git a/src/soc/amd/cezanne/psp_verstage/svc.c b/src/soc/amd/cezanne/psp_verstage/svc.c
index 78f7126..12fccc3 100644
--- a/src/soc/amd/cezanne/psp_verstage/svc.c
+++ b/src/soc/amd/cezanne/psp_verstage/svc.c
@@ -140,3 +140,10 @@
SVC_CALL1(SVC_SET_PLATFORM_BOOT_MODE, (uint32_t)boot_mode, retval);
return retval;
}
+
+uint32_t svc_write_postcode(uint32_t postcode)
+{
+ uint32_t retval = 0;
+ SVC_CALL1(SVC_WRITE_POSTCODE, postcode, retval);
+ return retval;
+}
diff --git a/src/vendorcode/amd/fsp/cezanne/include/bl_uapp/bl_syscall_public.h b/src/vendorcode/amd/fsp/cezanne/include/bl_uapp/bl_syscall_public.h
index ff2144d..4cf9e70 100644
--- a/src/vendorcode/amd/fsp/cezanne/include/bl_uapp/bl_syscall_public.h
+++ b/src/vendorcode/amd/fsp/cezanne/include/bl_uapp/bl_syscall_public.h
@@ -51,6 +51,7 @@
#define SVC_SHA 0x69
#define SVC_CCP_DMA 0x6A
#define SVC_SET_PLATFORM_BOOT_MODE 0x6C
+#define SVC_WRITE_POSTCODE 0x6D
struct mod_exp_params {
char *pExponent; // Exponent address