[S] Change in coreboot[master]: amdfwtool: Clean up the logic sequence of pointer growing

[Fred Reitberger (Code Review)]

Fred Reitberger has submitted this change. ( https://review.coreboot.org/c/coreboot/+/73180 )

Change subject: amdfwtool: Clean up the logic sequence of pointer growing
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amdfwtool: Clean up the logic sequence of pointer growing

When the EFS data is being packed, the pointer should be at EFS
header.
After that, it should be at body location.

TEST=binary identical test on amd/birman amd/chausie amd/majolica
amd/gardenia pcengines/apu2 amd/mandolin

Change-Id: Ia81e2bdf9feb02971723f39e7f223b5055807cd8
Signed-off-by: Zheng Bao 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73180
Tested-by: build bot (Jenkins) 
Reviewed-by: Fred Reitberger 
---
M util/amdfwtool/amdfwtool.c
1 file changed, 27 insertions(+), 12 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Fred Reitberger: Looks good to me, approved

diff --git a/util/amdfwtool/amdfwtool.c b/util/amdfwtool/amdfwtool.c
index cd29223..b946a1b 100644
--- a/util/amdfwtool/amdfwtool.c
+++ b/util/amdfwtool/amdfwtool.c
@@ -2496,18 +2496,8 @@
    }
    memset(ctx.rom, 0xFF, ctx.rom_size);

-	if (efs_location) {
-		if (efs_location != body_location) {
-			romsig_offset = efs_location;
-			set_current_pointer(&ctx, body_location);
-		} else {
-			romsig_offset = efs_location;
-			set_current_pointer(&ctx, romsig_offset + sizeof(embedded_firmware));
-		}
-	} else {
-		romsig_offset = AMD_ROMSIG_OFFSET;
-		set_current_pointer(&ctx, romsig_offset + sizeof(embedded_firmware));
-	}
+	romsig_offset = efs_location ? efs_location : AMD_ROMSIG_OFFSET;
+	set_current_pointer(&ctx, romsig_offset);

amd_romsig = BUFF_OFFSET(ctx, romsig_offset);
    amd_romsig->signature = EMBEDDED_FW_SIGNATURE;
@@ -2539,6 +2529,11 @@
    else
    	printf("\n");

+	if (efs_location != body_location)
+		set_current_pointer(&ctx, body_location);
+	else
+		set_current_pointer(&ctx, romsig_offset + sizeof(embedded_firmware));
+
    integrate_firmwares(&ctx, amd_romsig, amd_fw_table);

adjust_current_pointer(&ctx, 0, 0x10000U); /* TODO: is it necessary? */