101 lines
3.5 KiB
Diff
101 lines
3.5 KiB
Diff
From 6a96c18c474e6339fab93f54d52aa7dcc4b70e52 Mon Sep 17 00:00:00 2001
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From: Tobias Rist <tobias.rist@joynext.com>
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Date: Thu, 16 Mar 2023 21:31:15 +0900
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Subject: [PATCH] rcar-gen3: plat: BL2: check loaded NS image area
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Check if next NS image invades a previous loaded image.
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Correct non secure image area to avoid loading a NS image to secure
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Signed-off-by: Tobias Rist <tobias.rist@joynext.com>
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Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
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---
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drivers/renesas/common/io/io_rcar.c | 46 ++++++++++++++++++++++++--
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plat/renesas/common/include/rcar_def.h | 2 +-
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2 files changed, 45 insertions(+), 3 deletions(-)
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diff --git a/drivers/renesas/common/io/io_rcar.c b/drivers/renesas/common/io/io_rcar.c
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index 1459ba28b2..1a32430847 100644
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--- a/drivers/renesas/common/io/io_rcar.c
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+++ b/drivers/renesas/common/io/io_rcar.c
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@@ -84,6 +84,18 @@ typedef struct {
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#define RCAR_COUNT_LOAD_BL33 (2U)
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#define RCAR_COUNT_LOAD_BL33X (3U)
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+#define CHECK_IMAGE_AREA_CNT (5U)
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+#define BOOT_BL2_ADDR (0xE6304000U)
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+#define BOOT_BL2_LENGTH (0x19000U)
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+
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+typedef struct {
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+ uintptr_t dest;
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+ uintptr_t length;
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+} addr_loaded_t;
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+
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+static addr_loaded_t addr_loaded[CHECK_IMAGE_AREA_CNT] = { [0] = {BOOT_BL2_ADDR, BOOT_BL2_LENGTH} };
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+static uint32_t addr_loaded_cnt = 1;
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+
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static const plat_rcar_name_offset_t name_offset[] = {
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{BL31_IMAGE_ID, 0U, RCAR_ATTR_SET_ALL(0, 0, 0)},
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@@ -268,9 +280,9 @@ static int32_t check_load_area(uintptr_t dst, uintptr_t len)
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uintptr_t prot_start, prot_end;
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int32_t result = IO_SUCCESS;
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- dram_start = legacy ? DRAM1_BASE : DRAM_40BIT_BASE;
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+ dram_start = legacy ? DRAM1_NS_BASE : DRAM_40BIT_BASE;
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- dram_end = legacy ? DRAM1_BASE + DRAM1_SIZE :
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+ dram_end = legacy ? DRAM1_NS_BASE + DRAM1_NS_SIZE :
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DRAM_40BIT_BASE + DRAM_40BIT_SIZE;
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prot_start = legacy ? DRAM_PROTECTED_BASE : DRAM_40BIT_PROTECTED_BASE;
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@@ -298,6 +310,36 @@ static int32_t check_load_area(uintptr_t dst, uintptr_t len)
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ERROR("BL2: Out of range : dst=0x%lx len=0x%lx\n", dst, len);
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}
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+ if (addr_loaded_cnt >= CHECK_IMAGE_AREA_CNT) {
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+ ERROR("BL2: max loadable non secure images reached\n");
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+ result = IO_FAIL;
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+ }
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+ addr_loaded[addr_loaded_cnt].dest = dst;
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+ addr_loaded[addr_loaded_cnt].length = len;
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+ for(int n=0; n<addr_loaded_cnt; n++) {
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+ /* Check if next image invades a previous loaded image
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+ *
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+ * IMAGE n: area from previous image: dest| IMAGE n |length
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+ * IMAGE n+1: area from next image: dst | IMAGE n |len
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+ *
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+ * 1. check:
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+ * | IMAGE n |
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+ * | IMAGE n+1 |
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+ * 2. check:
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+ * | IMAGE n |
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+ * | IMAGE n+1 |
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+ *
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+ * */
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+ if (((dst > addr_loaded[n].dest) &&
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+ (dst < addr_loaded[n].dest + addr_loaded[n].length)) ||
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+ (((dst < addr_loaded[n].dest) &&
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+ (dst + len)) > addr_loaded[n].dest)) {
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+ ERROR("BL2: image is inside a previous image area.\n");
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+ result = IO_FAIL;
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+ }
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+ }
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+ addr_loaded_cnt++;
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+
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return result;
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}
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diff --git a/plat/renesas/common/include/rcar_def.h b/plat/renesas/common/include/rcar_def.h
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index 1b4527a9fc..38706a8373 100644
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--- a/plat/renesas/common/include/rcar_def.h
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+++ b/plat/renesas/common/include/rcar_def.h
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@@ -31,7 +31,7 @@
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#define DRAM_LIMIT ULL(0x0000010000000000)
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#define DRAM1_BASE U(0x40000000)
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#define DRAM1_SIZE U(0x80000000)
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-#define DRAM1_NS_BASE (DRAM1_BASE + U(0x10000000))
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+#define DRAM1_NS_BASE (DRAM1_BASE + U(0x08000000))
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#define DRAM1_NS_SIZE (DRAM1_SIZE - DRAM1_NS_BASE)
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#define DRAM_40BIT_BASE ULL(0x0400000000)
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#define DRAM_40BIT_SIZE ULL(0x0400000000)
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