lib/bootblock: Add simplified entry with basetime

This allows for minor optimization as num_timestamps becomes
a constant zero for a function with local scope. The loop
with calls to timestamp_add() gets removed from bootblock.

Change-Id: Id230075c0e76fe377b6ea8c8ddf8318e07d29b91
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34972
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/cpu/intel/car/bootblock.c

@@ -21,7 +21,7 @@ asmlinkage void bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist)
 {
 	saved_bist = bist;
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }
 
 void __weak bootblock_early_northbridge_init(void) { }

src/cpu/qemu-x86/bootblock.c

@@ -29,5 +29,5 @@ asmlinkage void bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist)
 	}
 
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }

src/include/bootblock_common.h

@@ -38,16 +38,7 @@ void bootblock_soc_init(void);
 asmlinkage void bootblock_c_entry(uint64_t base_timestamp);
 asmlinkage void bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist);
 
-/*
- * This is a the same as the bootblock main(), with the difference that it does
- * not collect a timestamp. Instead it accepts the initial timestamp and
- * possibly additional timestamp entries as arguments. This can be used in cases
- * where earlier stamps are available. Note that this function is designed to be
- * entered from C code. This function assumes that the timer has already been
- * initialized, so it does not call init_timer().
- */
-asmlinkage void bootblock_main_with_timestamp(uint64_t base_timestamp,
-	struct timestamp_entry *timestamps, size_t num_timestamps);
+void bootblock_main_with_basetime(uint64_t base_timestamp);
 
 /* This is the argument structure passed from decompressor to bootblock. */
 struct bootblock_arg {

src/lib/bootblock.c

@@ -30,7 +30,15 @@ __weak void bootblock_soc_early_init(void) { /* do nothing */ }
 __weak void bootblock_soc_init(void) { /* do nothing */ }
 __weak void bootblock_mainboard_init(void) { /* do nothing */ }
 
-asmlinkage void bootblock_main_with_timestamp(uint64_t base_timestamp,
+/*
+ * This is a the same as the bootblock main(), with the difference that it does
+ * not collect a timestamp. Instead it accepts the initial timestamp and
+ * possibly additional timestamp entries as arguments. This can be used in cases
+ * where earlier stamps are available. Note that this function is designed to be
+ * entered from C code. This function assumes that the timer has already been
+ * initialized, so it does not call init_timer().
+ */
+static void bootblock_main_with_timestamp(uint64_t base_timestamp,
 	struct timestamp_entry *timestamps, size_t num_timestamps)
 {
 	/* Initialize timestamps if we have TIMESTAMP region in memlayout.ld. */
@@ -60,6 +68,11 @@ asmlinkage void bootblock_main_with_timestamp(uint64_t base_timestamp,
 	run_romstage();
 }
 
+void bootblock_main_with_basetime(uint64_t base_timestamp)
+{
+	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+}
+
 void main(void)
 {
 	uint64_t base_timestamp = 0;

src/soc/amd/stoneyridge/bootblock/bootblock.c

@@ -88,7 +88,7 @@ asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 	}
 
 	/* TSC cannot be relied upon. Override the TSC value passed in. */
-	bootblock_main_with_timestamp(timestamp_get(), NULL, 0);
+	bootblock_main_with_basetime(timestamp_get());
 }
 
 void bootblock_soc_early_init(void)

src/soc/intel/apollolake/bootblock/bootblock.c

@@ -69,7 +69,7 @@ asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 	enable_rtc_upper_bank();
 
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }
 
 static void enable_pmcbar(void)

src/soc/intel/braswell/bootblock/bootblock.c

@@ -31,7 +31,7 @@
 asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 {
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }
 
 static void program_base_addresses(void)

src/soc/intel/cannonlake/bootblock/bootblock.c

@@ -44,7 +44,7 @@ const FSPT_UPD temp_ram_init_params = {
 asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 {
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }
 
 void bootblock_soc_early_init(void)

src/soc/intel/denverton_ns/bootblock/bootblock.c

@@ -51,7 +51,7 @@ const FSPT_UPD temp_ram_init_params = {
 asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 {
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 };
 
 void bootblock_soc_early_init(void)

src/soc/intel/icelake/bootblock/bootblock.c

@@ -23,7 +23,7 @@
 asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 {
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }
 
 void bootblock_soc_early_init(void)

src/soc/intel/quark/bootblock/bootblock.c

@@ -82,7 +82,7 @@ asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 	if (CONFIG(ENABLE_DEBUG_LED_BOOTBLOCK_ENTRY))
 		light_sd_led();
 
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }
 
 void bootblock_soc_early_init(void)

src/soc/intel/skylake/bootblock/bootblock.c

@@ -22,7 +22,7 @@
 asmlinkage void bootblock_c_entry(uint64_t base_timestamp)
 {
 	/* Call lib/bootblock.c main */
-	bootblock_main_with_timestamp(base_timestamp, NULL, 0);
+	bootblock_main_with_basetime(base_timestamp);
 }
 
 void bootblock_soc_early_init(void)