bootmem: add new memory type for BL31

After CL:31122, we can finally define a memory type specific for BL31,
to make sure BL31 is not loaded on other reserved area.

Change-Id: Idbd9a7fe4b12af23de1519892936d8d88a000e2c
Signed-off-by: Ting Shen <phoenixshen@google.com>
Reviewed-on: https://review.coreboot.org/c/31123
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/arch/arm64/arm_tf.c

@@ -50,7 +50,7 @@ void arm_tf_run_bl31(u64 payload_entry, u64 payload_arg0, u64 payload_spsr)
 	if (prog_locate(&bl31))
 		die("BL31 not found");
 
-	if (!selfload(&bl31))
+	if (!selfload_check(&bl31, BM_MEM_BL31))
 		die("BL31 load failed");
 	bl31_entry = prog_entry(&bl31);
 

src/arch/arm64/include/arch/memlayout.h

@@ -37,4 +37,8 @@
 	REGION(stack, addr, size, 16) \
 	_ = ASSERT(size >= 2K, "stack should be >= 2K, see toolchain.inc");
 
+#define BL31(addr, size) \
+	REGION(bl31, addr, size, 4K) \
+	_ = ASSERT(size % 4K == 0, "BL31 size must be divisible by 4K!");
+
 #endif /* __ARCH_MEMLAYOUT_H */

src/arch/arm64/tables.c

@@ -20,6 +20,8 @@
 #include <boot/coreboot_tables.h>
 #include <symbols.h>
 
+DECLARE_OPTIONAL_REGION(bl31);
+
 void arch_write_tables(uintptr_t coreboot_table)
 {
 }
@@ -28,6 +30,9 @@ void bootmem_arch_add_ranges(void)
 {
 	bootmem_add_range((uintptr_t)_ttb, _ttb_size, BM_MEM_RAMSTAGE);
 
+	if (IS_ENABLED(CONFIG_ARM64_USE_ARM_TRUSTED_FIRMWARE) && _bl31_size > 0)
+		bootmem_add_range((uintptr_t)_bl31, _bl31_size, BM_MEM_BL31);
+
 	if (!IS_ENABLED(CONFIG_COMMON_CBFS_SPI_WRAPPER))
 		return;
 	bootmem_add_range((uintptr_t)_postram_cbfs_cache,

src/include/bootmem.h

@@ -37,6 +37,7 @@ enum bootmem_type {
 	BM_MEM_NVS,		/* ACPI NVS Memory */
 	BM_MEM_UNUSABLE,	/* Unusable address space */
 	BM_MEM_VENDOR_RSVD,	/* Vendor Reserved */
+	BM_MEM_BL31,		/* Arm64 BL31 exectuable */
 	BM_MEM_TABLE,		/* Ram configuration tables are kept in */
 	/* Tags below this point are ignored for the OS table. */
 	BM_MEM_OS_CUTOFF = BM_MEM_TABLE,
@@ -53,6 +54,7 @@ enum bootmem_type {
  * Bootmem types match to LB_MEM tags, except for the following:
  * BM_MEM_RAMSTAGE : Translates to LB_MEM_RAM.
  * BM_MEM_PAYLOAD  : Translates to LB_MEM_RAM.
+ * BM_MEM_BL31     : Translates to LB_MEM_RESERVED.
  */
 void bootmem_write_memory_table(struct lb_memory *mem);
 

src/include/symbols.h

@@ -114,6 +114,10 @@ extern u8 _pdpt[];
 extern u8 _epdpt[];
 #define _pdpt_size (_epdpt - _pdpt)
 
+extern u8 _bl31[];
+extern u8 _ebl31[];
+#define _bl31_size (_ebl31 - _bl31)
+
 /* Put this into a .c file accessing a linker script region to mark that region
  * as "optional". If it is defined in memlayout.ld (or anywhere else), the
  * values from that definition will be used. If not, start, end and size will

src/lib/bootmem.c

@@ -59,6 +59,8 @@ static uint32_t bootmem_to_lb_tag(const enum bootmem_type tag)
 		return LB_MEM_UNUSABLE;
 	case BM_MEM_VENDOR_RSVD:
 		return LB_MEM_VENDOR_RSVD;
+	case BM_MEM_BL31:
+		return LB_MEM_RESERVED;
 	case BM_MEM_TABLE:
 		return LB_MEM_TABLE;
 	default:
@@ -142,6 +144,7 @@ static const struct range_strings type_strings[] = {
 	{ BM_MEM_NVS, "NVS" },
 	{ BM_MEM_UNUSABLE, "UNUSABLE" },
 	{ BM_MEM_VENDOR_RSVD, "VENDOR RESERVED" },
+	{ BM_MEM_BL31, "BL31" },
 	{ BM_MEM_TABLE, "CONFIGURATION TABLES" },
 	{ BM_MEM_RAMSTAGE, "RAMSTAGE" },
 	{ BM_MEM_PAYLOAD, "PAYLOAD" },

src/soc/cavium/cn81xx/include/soc/memlayout.ld

@@ -22,7 +22,7 @@ SECTIONS
 {
 	DRAM_START(0x00000000)
 	/* Secure region 0 - 1MiB */
-	REGION(bl31, 0, 0xe0000, 0x1000)
+	BL31(0, 0xe0000)
 	REGION(sff8104, 0xe0000, 0x20000, 0x1000)
 
 	/* Insecure region 1MiB - TOP OF DRAM */

src/soc/cavium/cn81xx/soc.c

@@ -319,18 +319,11 @@ static int dt_platform_fixup(struct device_tree_fixup *fixup,
 	return 0;
 }
 
-extern u8 _bl31[];
-extern u8 _ebl31[];
 extern u8 _sff8104[];
 extern u8 _esff8104[];
 
 void bootmem_platform_add_ranges(void)
 {
-	/* ATF reserved */
-	bootmem_add_range((uintptr_t)_bl31,
-			  ((uintptr_t)_ebl31 - (uintptr_t)_bl31),
-			  BM_MEM_RESERVED);
-
 	bootmem_add_range((uintptr_t)_sff8104,
 			  ((uintptr_t)_esff8104 - (uintptr_t)_sff8104),
 			  BM_MEM_RESERVED);

src/soc/mediatek/mt8173/soc.c

@@ -13,10 +13,16 @@
  * GNU General Public License for more details.
  */
 
+#include <bootmem.h>
 #include <device/device.h>
 #include <symbols.h>
 #include <soc/emi.h>
 
+void bootmem_platform_add_ranges(void)
+{
+	bootmem_add_range(0x101000, 124 * KiB, BM_MEM_BL31);
+}
+
 static void soc_read_resources(struct device *dev)
 {
 	ram_resource(dev, 0, (uintptr_t)_dram / KiB, sdram_size() / KiB);

src/soc/mediatek/mt8183/include/soc/memlayout.ld

@@ -47,4 +47,6 @@ SECTIONS
 	DRAM_START(0x40000000)
 	POSTRAM_CBFS_CACHE(0x40000000, 2M)
 	RAMSTAGE(0x40200000, 256K)
+
+	BL31(0x54600000, 0x60000)
 }

src/soc/nvidia/tegra210/soc.c

@@ -16,6 +16,7 @@
 
 #include <arch/io.h>
 #include <arch/cache.h>
+#include <bootmem.h>
 #include <bootmode.h>
 #include <bootstate.h>
 #include <console/console.h>
@@ -33,13 +34,23 @@
 
 #include "chip.h"
 
+void bootmem_platform_add_ranges(void)
+{
+	uintptr_t begin;
+	size_t size;
+	carveout_range(CARVEOUT_TZ, &begin, &size);
+	if (size == 0)
+		return;
+	bootmem_add_range(begin * MiB, size * MiB, BM_MEM_BL31);
+}
+
 static void soc_read_resources(struct device *dev)
 {
 	unsigned long index = 0;
 	int i; uintptr_t begin, end;
 	size_t size;
 
-	for (i = 0; i < CARVEOUT_NUM; i++) {
+	for (i = CARVEOUT_TZ + 1; i < CARVEOUT_NUM; i++) {
 		carveout_range(i, &begin, &size);
 		if (size == 0)
 			continue;

src/soc/rockchip/rk3399/include/soc/memlayout.ld

@@ -19,6 +19,7 @@
 SECTIONS
 {
 	DRAM_START(0x00000000)
+	BL31(0, 0x100000)
 	POSTRAM_CBFS_CACHE(0x00100000, 1M)
 	RAMSTAGE(0x00300000, 256K)
 	DMA_COHERENT(0x10000000, 2M)