arch/x86: Drop _car_relocatable_data symbols

These have become aliases to _car_global_[start|end].

Change-Id: Ibdcaaafdc0e4c6df4a795474903768230d41680d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35033
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/arch/x86/car.ld

@@ -64,8 +64,6 @@
         . += 80;
         _car_ehci_dbg_info_end = .;
 
-	_car_relocatable_data_start = .;
-
 	/* _car_global_start and _car_global_end provide symbols to per-stage
 	 * variables that are not shared like the timestamp and the pre-ram
 	 * cbmem console. This is useful for clearing this area on a per-stage
@@ -78,13 +76,11 @@
 	*(.sbss)
 	*(.sbss.*)
 #else
-	/* .car.global_data objects only around when
-	 * CONFIG_CAR_GLOBAL_MIGRATION is employed. */
 	*(.car.global_data);
 #endif
 	. = ALIGN(ARCH_POINTER_ALIGN_SIZE);
 	_car_global_end = .;
-	_car_relocatable_data_end = .;
+	_car_unallocated_start = .;
 
 #if !CONFIG(C_ENVIRONMENT_BOOTBLOCK)
 	_car_stack_start = .;

src/arch/x86/include/arch/early_variables.h

@@ -52,13 +52,13 @@ void car_set_reloc_ptr(void *var, void *val);
 
 static inline size_t car_data_size(void)
 {
-	size_t car_size = _car_relocatable_data_size;
-	return ALIGN_UP(car_size, 64);
+	size_t car_size = _car_global_size;
+	return ALIGN(car_size, 64);
 }
 
 static inline size_t car_object_offset(void *ptr)
 {
-	return (char *)ptr - &_car_relocatable_data_start[0];
+	return (char *)ptr - &_car_global_start[0];
 }
 
 #else

src/arch/x86/include/arch/symbols.h

@@ -31,22 +31,18 @@ extern char _car_stack_start[];
 extern char _car_stack_end[];
 #define _car_stack_size (_car_stack_end - _car_stack_start)
 
+extern char _car_unallocated_start[];
+
 extern char _car_ehci_dbg_info_start[];
 extern char _car_ehci_dbg_info_end[];
 #define _car_ehci_dbg_info_size \
 	(_car_ehci_dbg_info_end - _car_ehci_dbg_info_start)
 
 /*
- * The _car_relocatable_data_[start|end] symbols cover CAR data which is
- * relocatable once memory comes online. Variables with CAR_GLOBAL decoration
- * reside within this region. The _car_global_[start|end] is a subset of the
- * relocatable region which excludes the timestamp region because of
- * intricacies in the timestamp code.
+ * The _car_global_[start|end]symbols cover CAR data which is relocatable
+ * once memory comes online. Variables with CAR_GLOBAL decoration
+ * reside within this region.
  */
-extern char _car_relocatable_data_start[];
-extern char _car_relocatable_data_end[];
-#define _car_relocatable_data_size \
-	(_car_relocatable_data_end - _car_relocatable_data_start)
 extern char _car_global_start[];
 extern char _car_global_end[];
 #define _car_global_size (_car_global_end - _car_global_start)

src/cpu/amd/car/post_cache_as_ram.c

@@ -101,11 +101,11 @@ asmlinkage void *post_cache_as_ram(void)
 	void *migrated_car = (void *)(CONFIG_RAMTOP - car_size);
 
 	print_car_debug("Copying data from cache to RAM...");
-	memcpy_(migrated_car, _car_relocatable_data_start, car_size);
+	memcpy_(migrated_car, _car_global_start, car_size);
 	print_car_debug(" Done\n");
 
 	print_car_debug("Verifying data integrity in RAM...");
-	if (memcmp_(migrated_car, _car_relocatable_data_start, car_size) == 0)
+	if (memcmp_(migrated_car, _car_global_start, car_size) == 0)
 		print_car_debug(" Done\n");
 	else
 		print_car_debug(" FAILED\n");

src/cpu/x86/car.c

@@ -44,8 +44,8 @@ void *car_get_var_ptr(void *var)
 {
 	char *migrated_base = NULL;
 	int offset;
-	void *_car_start = _car_relocatable_data_start;
-	void *_car_end = _car_relocatable_data_end;
+	void *_car_start = _car_global_start;
+	void *_car_end = _car_global_end;
 
 	/* If the cache-as-ram has not been migrated return the pointer
 	 * passed in. */
@@ -127,7 +127,7 @@ static void do_car_migrate_variables(void)
 		return;
 	}
 
-	memcpy(migrated_base, _car_relocatable_data_start, car_size);
+	memcpy(migrated_base, _car_global_start, car_size);
 
 	/* Mark that the data has been moved. */
 	car_migrated = ~0;

src/drivers/intel/fsp2_0/memory_init.c

@@ -407,7 +407,7 @@ void fsp_memory_init(bool s3wake)
 	/* Build up memory map of romstage address space including CAR. */
 	memranges_init_empty(&memmap, &freeranges[0], ARRAY_SIZE(freeranges));
 	memranges_insert(&memmap, (uintptr_t)_car_region_start,
-		_car_relocatable_data_end - _car_region_start, 0);
+		_car_unallocated_start - _car_region_start, 0);
 	memranges_insert(&memmap, (uintptr_t)_program, REGION_SIZE(program), 0);
 
 	if (!CONFIG(FSP_M_XIP))

src/soc/intel/quark/romstage/fsp2_0.c

@@ -115,7 +115,7 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *fspm_upd, uint32_t version)
 			aupd->StackBase);
 		printk(BIOS_SPEW, "|                   |\n");
 		printk(BIOS_SPEW, "+-------------------+ 0x%p\n",
-			_car_relocatable_data_end);
+			_car_global_end);
 		printk(BIOS_SPEW, "| coreboot data     |\n");
 		printk(BIOS_SPEW, "+-------------------+ 0x%p\n",
 			_car_stack_end);