tools: mkimage: add patches for 64-bit MediaTek BootROM

Add patches for mkimage to allow using it instead of the binary-only
'bromimage' tool to generate bl2 for MT7622.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 226 insertions, 0 deletions

diff --git a/tools/mkimage/patches/081-mtk_image-add-an-option-to-set-device-header-offset.patch b/tools/mkimage/patches/081-mtk_image-add-an-option-to-set-device-header-offset.patch
new file mode 100644
index 0000000000..45f8f7c1c1
--- /dev/null
+++ b/tools/mkimage/patches/081-mtk_image-add-an-option-to-set-device-header-offset.patch
@@ -0,0 +1,226 @@
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+From: Weijie Gao <weijie.gao@mediatek.com>
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+CC: GSS_MTK_Uboot_upstream <GSS_MTK_Uboot_upstream@mediatek.com>, Weijie Gao
+ <weijie.gao@mediatek.com>
+Subject: [PATCH] tools: mtk_image: add an option to set device header offset
+Date: Tue, 9 Mar 2021 15:52:31 +0800
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+
+This patch adds an option which allows setting the device header offset.
+This is useful if this tool is used to generate ATF BL2 image of mt7622 for
+SD cards.
+
+Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
+---
+ tools/mtk_image.c | 50 ++++++++++++++++++++++++++++++++++++++++++++---
+ 1 file changed, 47 insertions(+), 3 deletions(-)
+
+diff --git a/tools/mtk_image.c b/tools/mtk_image.c
+index bde1e5da4b..418c5fd54b 100644
+--- a/tools/mtk_image.c
++++ b/tools/mtk_image.c
+@@ -243,8 +243,13 @@ static const struct brom_img_type {
+ 	}
+ };
+ 
++/* Indicates whether we're generating or verifying */
++static bool img_gen;
++static uint32_t img_size;
++
+ /* Image type selected by user */
+ static enum brlyt_img_type hdr_media;
++static uint32_t hdr_offset;
+ static int use_lk_hdr;
+ static bool is_arm64_image;
+ 
+@@ -275,6 +280,7 @@ static int mtk_brom_parse_imagename(const char *imagename)
+ 
+ 	/* User passed arguments from image name */
+ 	static const char *media = "";
++	static const char *hdr_offs = "";
+ 	static const char *nandinfo = "";
+ 	static const char *lk = "";
+ 	static const char *arm64_param = "";
+@@ -317,6 +323,9 @@ static int mtk_brom_parse_imagename(const char *imagename)
+ 			if (!strcmp(key, "media"))
+ 				media = val;
+ 
++			if (!strcmp(key, "hdroffset"))
++				hdr_offs = val;
++
+ 			if (!strcmp(key, "nandinfo"))
+ 				nandinfo = val;
+ 
+@@ -359,6 +368,10 @@ static int mtk_brom_parse_imagename(const char *imagename)
+ 		}
+ 	}
+ 
++	/* parse device header offset */
++	if (hdr_offs && hdr_offs[0])
++		hdr_offset = strtoul(hdr_offs, NULL, 0);
++
+ 	if (arm64_param && arm64_param[0] == '1')
+ 		is_arm64_image = true;
+ 
+@@ -422,6 +435,7 @@ static int mtk_image_vrec_header(struct image_tool_params *params,
+ static int mtk_image_verify_gen_header(const uint8_t *ptr, int print)
+ {
+ 	union gen_boot_header *gbh = (union gen_boot_header *)ptr;
++	uint32_t gfh_offset, total_size, devh_size;
+ 	struct brom_layout_header *bh;
+ 	struct gfh_header *gfh;
+ 	const char *bootmedia;
+@@ -453,7 +467,32 @@ static int mtk_image_verify_gen_header(const uint8_t *ptr, int print)
+ 	    le32_to_cpu(bh->type) != BRLYT_TYPE_SDMMC))
+ 		return -1;
+ 
+-	gfh = (struct gfh_header *)(ptr + le32_to_cpu(bh->header_size));
++	devh_size = sizeof(struct gen_device_header);
++
++	if (img_gen) {
++		gfh_offset = devh_size;
++	} else {
++		gfh_offset = le32_to_cpu(bh->header_size);
++
++		if (gfh_offset + sizeof(struct gfh_header) > img_size) {
++			/*
++			 * This may happen if the hdr_offset used to generate
++			 * this image is not zero.
++			 * Since device header size is not fixed, we can't
++			 * cover all possible cases.
++			 * Assuming the image is valid only if the real
++			 * device header size equals to devh_size.
++			 */
++			total_size = le32_to_cpu(bh->total_size);
++
++			if (total_size - gfh_offset > img_size - devh_size)
++				return -1;
++
++			gfh_offset = devh_size;
++		}
++	}
++
++	gfh = (struct gfh_header *)(ptr + gfh_offset);
+ 
+ 	if (strcmp(gfh->file_info.name, GFH_FILE_INFO_NAME))
+ 		return -1;
+@@ -549,6 +588,8 @@ static int mtk_image_verify_header(unsigned char *ptr, int image_size,
+ 	if (le32_to_cpu(lk->magic) == LK_PART_MAGIC)
+ 		return 0;
+ 
++	img_size = image_size;
++
+ 	if (!strcmp((char *)ptr, NAND_BOOT_NAME))
+ 		return mtk_image_verify_nand_header(ptr, 0);
+ 	else
+@@ -682,8 +723,8 @@ static void mtk_image_set_gen_header(void *ptr, off_t filesize,
+ 
+ 	/* BRLYT header */
+ 	put_brom_layout_header(&hdr->brlyt, hdr_media);
+-	hdr->brlyt.header_size = cpu_to_le32(sizeof(struct gen_device_header));
+-	hdr->brlyt.total_size = cpu_to_le32(filesize);
++	hdr->brlyt.header_size = cpu_to_le32(hdr_offset + sizeof(*hdr));
++	hdr->brlyt.total_size = cpu_to_le32(hdr_offset + filesize);
+ 	hdr->brlyt.header_size_2 = hdr->brlyt.header_size;
+ 	hdr->brlyt.total_size_2 = hdr->brlyt.total_size;
+ 
+@@ -747,6 +788,9 @@ static void mtk_image_set_header(void *ptr, struct stat *sbuf, int ifd,
+ 		return;
+ 	}
+ 
++	img_gen = true;
++	img_size = sbuf->st_size;
++
+ 	if (hdr_media == BRLYT_TYPE_NAND || hdr_media == BRLYT_TYPE_SNAND)
+ 		mtk_image_set_nand_header(ptr, sbuf->st_size, params->addr);
+ 	else