soc/mediatek/mt8196: Reserve 70 MB memory for OP-TEE

Reserve 70MB memory space for running the OP-TEE image.

BUG=b:317009620
TEST=build pass

Change-Id: I6f75870bdd76e89866508d351b04a0921f30fe4d
Signed-off-by: Jarried Lin <jarried.lin@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85249
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/common/include/soc/symbols.h

@@ -6,5 +6,6 @@
 #include <symbols.h>
 
 DECLARE_REGION(dram_dma)
+DECLARE_REGION(resv_mem_optee)
 
 #endif /* _SOC_MEDIATEK_COMMON_SYMBOLS_H_ */

src/soc/mediatek/mt8196/include/soc/memlayout.ld

@@ -2,6 +2,9 @@
 
 #include <soc/memlayout.h>
 
+#define OPTEE_BUF(addr, size) \
+	REGION(resv_mem_optee, addr, size, 4K)
+
 SECTIONS
 {
 	/* MT8196 has 256KB SRAM. */
@@ -54,6 +57,7 @@ SECTIONS
 	DRAM_DMA(0x80000000, 1M)
 	POSTRAM_CBFS_CACHE(0x80100000, 2M)
 	RAMSTAGE(0x80300000, 2M)
+	OPTEE_BUF(0x80500000, 70M)
 
 	BL31(0x94600000, 0x200000)
 }

src/soc/mediatek/mt8196/soc.c

@@ -5,8 +5,16 @@
 #include <soc/emi.h>
 #include <soc/mmu_operations.h>
 #include <soc/pcie.h>
+#include <soc/symbols.h>
 #include <symbols.h>
 
+void bootmem_platform_add_ranges(void)
+{
+	if (CONFIG(ARM64_BL31_OPTEE_WITH_SMC))
+		bootmem_add_range((uint64_t)_resv_mem_optee,
+				  REGION_SIZE(resv_mem_optee), BM_MEM_RESERVED);
+}
+
 static void soc_read_resources(struct device *dev)
 {
 	ram_range(dev, 0, (uintptr_t)_dram, sdram_size());