From: Anshul Dalal <anshuld@ti.com>
Date: Fri, 17 Oct 2025 13:15:32 +0000 (+0530)
Subject: mach-k3: add carveouts for TFA and optee
X-Git-Tag: v2026.01-rc1~11^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4f5285f0e640c3e9b40420ba3b11358446646b11;p=pandora-u-boot.git

mach-k3: add carveouts for TFA and optee

K3 platforms have reserved memory regions for TFA and OPTEE which should
be unmapped for U-Boot. While other "no-map" memory regions like the
memory pools for remote cores should not be unmapped to allow U-Boot to
load firmware during remoteproc.

Therefore this patch adds the necessary fdt fixups to properly set the
load address for TFA/OPTEE and unmaps both by mmu_unmap_reserved_mem.

Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Anshul Dalal <anshuld@ti.com>
Tested-by: Wadim Egorov <w.egorov@phytec.de>
---

diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c
index f734f10b605..7c06764af82 100644
--- a/arch/arm/mach-k3/common.c
+++ b/arch/arm/mach-k3/common.c
@@ -31,6 +31,7 @@
 #include <dm/uclass-internal.h>
 #include <dm/device-internal.h>
 #include <asm/armv8/mmu.h>
+#include <mach/k3-common-fdt.h>
 #include <mach/k3-ddr.h>
 
 #define PROC_BOOT_CTRL_FLAG_R5_CORE_HALT	0x00000001
@@ -263,6 +264,7 @@ void board_prep_linux(struct bootm_headers *images)
 
 void enable_caches(void)
 {
+	void *fdt = (void *)gd->fdt_blob;
 	int ret;
 
 	ret = mem_map_from_dram_banks(K3_MEM_MAP_FIRST_BANK_IDX, K3_MEM_MAP_LEN,
@@ -273,6 +275,30 @@ void enable_caches(void)
 
 	mmu_setup();
 
+	if (CONFIG_K3_ATF_LOAD_ADDR >= CFG_SYS_SDRAM_BASE) {
+		ret = fdt_fixup_reserved(fdt, "tfa", CONFIG_K3_ATF_LOAD_ADDR,
+					 0x80000);
+		if (ret)
+			printf("%s: Failed to perform tfa fixups (%s)\n",
+			       __func__, fdt_strerror(ret));
+		ret = mmu_unmap_reserved_mem("tfa", true);
+		if (ret)
+			printf("%s: Failed to unmap tfa reserved mem (%d)\n",
+			       __func__, ret);
+	}
+
+	if (CONFIG_K3_OPTEE_LOAD_ADDR >= CFG_SYS_SDRAM_BASE) {
+		ret = fdt_fixup_reserved(fdt, "optee",
+					 CONFIG_K3_OPTEE_LOAD_ADDR, 0x1800000);
+		if (ret)
+			printf("%s: Failed to perform optee fixups (%s)\n",
+			       __func__, fdt_strerror(ret));
+		ret = mmu_unmap_reserved_mem("optee", true);
+		if (ret)
+			printf("%s: Failed to unmap optee reserved mem (%d)\n",
+			       __func__, ret);
+	}
+
 	icache_enable();
 	dcache_enable();
 }