[PATCH v4 2/3] tools: mkimage: Add Allwinner eGON support
Andre Przywara
andre.przywara at arm.com
Wed Jan 6 10:24:37 CET 2021
So far we used the separate mksunxiboot tool for generating a bootable
image for Allwinner SPLs, probably just for historical reasons.
Use the mkimage framework to generate a so called eGON image the
Allwinner BROM expects.
The new image type is called "sunxi_egon", to differentiate it
from the (still to be implemented) secure boot TOC0 image.
Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
common/image.c | 1 +
include/image.h | 1 +
include/sunxi_image.h | 1 +
tools/Makefile | 1 +
tools/sunxi_egon.c | 136 ++++++++++++++++++++++++++++++++++++++++++
5 files changed, 140 insertions(+)
create mode 100644 tools/sunxi_egon.c
diff --git a/common/image.c b/common/image.c
index 451fc689a89..6923dac7c07 100644
--- a/common/image.c
+++ b/common/image.c
@@ -189,6 +189,7 @@ static const table_entry_t uimage_type[] = {
{ IH_TYPE_STM32IMAGE, "stm32image", "STMicroelectronics STM32 Image" },
{ IH_TYPE_MTKIMAGE, "mtk_image", "MediaTek BootROM loadable Image" },
{ IH_TYPE_COPRO, "copro", "Coprocessor Image"},
+ { IH_TYPE_SUNXI_EGON, "sunxi_egon", "Allwinner eGON Boot Image" },
{ -1, "", "", },
};
diff --git a/include/image.h b/include/image.h
index 00bc03bebec..89bfca2155a 100644
--- a/include/image.h
+++ b/include/image.h
@@ -308,6 +308,7 @@ enum {
IH_TYPE_IMX8MIMAGE, /* Freescale IMX8MBoot Image */
IH_TYPE_IMX8IMAGE, /* Freescale IMX8Boot Image */
IH_TYPE_COPRO, /* Coprocessor Image for remoteproc*/
+ IH_TYPE_SUNXI_EGON, /* Allwinner eGON Boot Image */
IH_TYPE_COUNT, /* Number of image types */
};
diff --git a/include/sunxi_image.h b/include/sunxi_image.h
index d0d1290eb72..5b2055c0af3 100644
--- a/include/sunxi_image.h
+++ b/include/sunxi_image.h
@@ -13,6 +13,7 @@
#define SUNXI_IMAGE_H
#define BOOT0_MAGIC "eGON.BT0"
+#define BROM_STAMP_VALUE 0x5f0a6c39
#define SPL_SIGNATURE "SPL" /* marks "sunxi" SPL header */
#define SPL_MAJOR_BITS 3
#define SPL_MINOR_BITS 5
diff --git a/tools/Makefile b/tools/Makefile
index 14fb0ed98f6..9b1aa51b10a 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -104,6 +104,7 @@ dumpimage-mkimage-objs := aisimage.o \
stm32image.o \
$(ROCKCHIP_OBS) \
socfpgaimage.o \
+ sunxi_egon.o \
lib/crc16.o \
lib/sha1.o \
lib/sha256.o \
diff --git a/tools/sunxi_egon.c b/tools/sunxi_egon.c
new file mode 100644
index 00000000000..a5299eb6a11
--- /dev/null
+++ b/tools/sunxi_egon.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2018 Arm Ltd.
+ */
+
+#include "imagetool.h"
+#include <image.h>
+
+#include <sunxi_image.h>
+
+/*
+ * NAND requires 8K padding. SD/eMMC gets away with 512 bytes,
+ * but let's use the larger padding to cover both.
+ */
+#define PAD_SIZE 8192
+
+static int egon_check_params(struct image_tool_params *params)
+{
+ /* We just need a binary image file. */
+ return !params->dflag;
+}
+
+static int egon_verify_header(unsigned char *ptr, int image_size,
+ struct image_tool_params *params)
+{
+ const struct boot_file_head *header = (void *)ptr;
+ uint32_t length;
+
+ /* First 4 bytes must be an ARM branch instruction. */
+ if ((le32_to_cpu(header->b_instruction) & 0xff000000) != 0xea000000)
+ return EXIT_FAILURE;
+
+ if (memcmp(header->magic, BOOT0_MAGIC, sizeof(header->magic)))
+ return EXIT_FAILURE;
+
+ length = le32_to_cpu(header->length);
+ /* Must be at least 512 byte aligned. */
+ if (length & 511)
+ return EXIT_FAILURE;
+
+ /*
+ * Image could also contain U-Boot proper, so could be bigger.
+ * But it must not be shorter.
+ */
+ if (image_size < length)
+ return EXIT_FAILURE;
+
+ return EXIT_SUCCESS;
+}
+
+static void egon_print_header(const void *buf)
+{
+ const struct boot_file_head *header = buf;
+
+ printf("Allwinner eGON image, size: %d bytes\n",
+ le32_to_cpu(header->length));
+
+ if (memcmp(header->spl_signature, SPL_SIGNATURE, 3))
+ return;
+
+ printf("\tSPL header version %d.%d\n",
+ header->spl_signature[3] >> SPL_MINOR_BITS,
+ header->spl_signature[3] & ((1U << SPL_MINOR_BITS) - 1));
+ if (header->spl_signature[3] >= SPL_DT_HEADER_VERSION) {
+ uint32_t dt_name_offs = le32_to_cpu(header->dt_name_offset);
+
+ if (dt_name_offs > 0)
+ printf("\tDT name: %s\n", (char *)buf + dt_name_offs);
+ }
+}
+
+static void egon_set_header(void *buf, struct stat *sbuf, int infd,
+ struct image_tool_params *params)
+{
+ struct boot_file_head *header = buf;
+ uint32_t *buf32 = buf;
+ uint32_t checksum = 0, value;
+ int i;
+
+ /* Generate an ARM branch instruction to jump over the header. */
+ value = 0xea000000 | (sizeof(struct boot_file_head) / 4 - 2);
+ header->b_instruction = cpu_to_le32(value);
+
+ memcpy(header->magic, BOOT0_MAGIC, sizeof(header->magic));
+ header->check_sum = cpu_to_le32(BROM_STAMP_VALUE);
+ header->length = cpu_to_le32(params->file_size);
+
+ memcpy(header->spl_signature, SPL_SIGNATURE, 3);
+ header->spl_signature[3] = SPL_ENV_HEADER_VERSION;
+
+ /* If an image name has been provided, use it as the DT name. */
+ if (params->imagename && params->imagename[0]) {
+ if (strlen(params->imagename) > sizeof(header->string_pool) - 1)
+ printf("WARNING: DT name too long for SPL header!\n");
+ else {
+ strcpy((char *)header->string_pool, params->imagename);
+ value = offsetof(struct boot_file_head, string_pool);
+ header->dt_name_offset = cpu_to_le32(value);
+ header->spl_signature[3] = SPL_DT_HEADER_VERSION;
+ }
+ }
+
+ /* Calculate the checksum. Yes, it's that simple. */
+ for (i = 0; i < sbuf->st_size / 4; i++)
+ checksum += le32_to_cpu(buf32[i]);
+ header->check_sum = cpu_to_le32(checksum);
+}
+
+static int egon_check_image_type(uint8_t type)
+{
+ return type == IH_TYPE_SUNXI_EGON ? 0 : 1;
+}
+
+static int egon_vrec_header(struct image_tool_params *params,
+ struct image_type_params *tparams)
+{
+ tparams->hdr = calloc(sizeof(struct boot_file_head), 1);
+
+ /* Return padding to 8K blocks. */
+ return ALIGN(params->file_size, PAD_SIZE) - params->file_size;
+}
+
+U_BOOT_IMAGE_TYPE(
+ sunxi_egon,
+ "Allwinner eGON Boot Image support",
+ sizeof(struct boot_file_head),
+ NULL,
+ egon_check_params,
+ egon_verify_header,
+ egon_print_header,
+ egon_set_header,
+ NULL,
+ egon_check_image_type,
+ NULL,
+ egon_vrec_header
+);
--
2.17.5
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