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https://github.com/AsahiLinux/u-boot
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95d363cc30
With all targets converted to generate prepadded images, this removes the spl_boot0 field from our config structure and removes the unused code-path (for images that are not prepadded): i.e. spl_boot0 is now implied as 'true' and the code is specialised by removing the other case. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
379 lines
9.7 KiB
C
379 lines
9.7 KiB
C
/*
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* (C) Copyright 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* (C) 2017 Theobroma Systems Design und Consulting GmbH
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* Helper functions for Rockchip images
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*/
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#include "imagetool.h"
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#include <image.h>
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#include <rc4.h>
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#include "mkimage.h"
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#include "rkcommon.h"
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#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
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enum {
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RK_SIGNATURE = 0x0ff0aa55,
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};
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/**
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* struct header0_info - header block for boot ROM
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*
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* This is stored at SD card block 64 (where each block is 512 bytes, or at
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* the start of SPI flash. It is encoded with RC4.
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*
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* @signature: Signature (must be RKSD_SIGNATURE)
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* @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary
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* @init_offset: Offset in blocks of the SPL code from this header
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* block. E.g. 4 means 2KB after the start of this header.
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* Other fields are not used by U-Boot
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*/
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struct header0_info {
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uint32_t signature;
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uint8_t reserved[4];
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uint32_t disable_rc4;
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uint16_t init_offset;
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uint8_t reserved1[492];
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uint16_t init_size;
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uint16_t init_boot_size;
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uint8_t reserved2[2];
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};
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/**
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* struct header1_info
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*/
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struct header1_info {
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uint32_t magic;
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};
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/**
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* struct spl_info - spl info for each chip
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*
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* @imagename: Image name(passed by "mkimage -n")
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* @spl_hdr: Boot ROM requires a 4-bytes spl header
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* @spl_size: Spl size(include extra 4-bytes spl header)
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* @spl_rc4: RC4 encode the SPL binary (same key as header)
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*/
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struct spl_info {
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const char *imagename;
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const char *spl_hdr;
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const uint32_t spl_size;
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const bool spl_rc4;
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};
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static struct spl_info spl_infos[] = {
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{ "rk3036", "RK30", 0x1000, false },
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{ "rk3128", "RK31", 0x1800, false },
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{ "rk3188", "RK31", 0x8000 - 0x800, true },
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{ "rk322x", "RK32", 0x8000 - 0x1000, false },
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{ "rk3288", "RK32", 0x8000, false },
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{ "rk3328", "RK32", 0x8000 - 0x1000, false },
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{ "rk3368", "RK33", 0x8000 - 0x1000, false },
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{ "rk3399", "RK33", 0x30000 - 0x2000, false },
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{ "rv1108", "RK11", 0x1800, false },
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};
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static unsigned char rc4_key[16] = {
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124, 78, 3, 4, 85, 5, 9, 7,
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45, 44, 123, 56, 23, 13, 23, 17
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};
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static struct spl_info *rkcommon_get_spl_info(char *imagename)
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{
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int i;
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if (!imagename)
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return NULL;
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for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
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if (!strncmp(imagename, spl_infos[i].imagename, 6))
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return spl_infos + i;
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return NULL;
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}
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int rkcommon_check_params(struct image_tool_params *params)
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{
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int i;
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if (rkcommon_get_spl_info(params->imagename) != NULL)
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return EXIT_SUCCESS;
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/*
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* If this is a operation (list or extract), the don't require
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* imagename to be set.
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*/
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if (params->lflag || params->iflag)
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return EXIT_SUCCESS;
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fprintf(stderr, "ERROR: imagename (%s) is not supported!\n",
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params->imagename ? params->imagename : "NULL");
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fprintf(stderr, "Available imagename:");
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for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
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fprintf(stderr, "\t%s", spl_infos[i].imagename);
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fprintf(stderr, "\n");
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return EXIT_FAILURE;
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}
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const char *rkcommon_get_spl_hdr(struct image_tool_params *params)
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{
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struct spl_info *info = rkcommon_get_spl_info(params->imagename);
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/*
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* info would not be NULL, because of we checked params before.
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*/
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return info->spl_hdr;
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}
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int rkcommon_get_spl_size(struct image_tool_params *params)
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{
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struct spl_info *info = rkcommon_get_spl_info(params->imagename);
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/*
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* info would not be NULL, because of we checked params before.
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*/
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return info->spl_size;
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}
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bool rkcommon_need_rc4_spl(struct image_tool_params *params)
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{
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struct spl_info *info = rkcommon_get_spl_info(params->imagename);
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/*
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* info would not be NULL, because of we checked params before.
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*/
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return info->spl_rc4;
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}
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static void rkcommon_set_header0(void *buf, uint file_size,
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struct image_tool_params *params)
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{
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struct header0_info *hdr = buf;
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memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
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hdr->signature = RK_SIGNATURE;
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hdr->disable_rc4 = !rkcommon_need_rc4_spl(params);
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hdr->init_offset = RK_INIT_OFFSET;
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hdr->init_size = DIV_ROUND_UP(file_size, RK_BLK_SIZE);
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/*
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* The init_size has to be a multiple of 4 blocks (i.e. of 2K)
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* or the BootROM will not boot the image.
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*
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* Note: To verify that this is not a legacy constraint, we
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* rechecked this against the RK3399 BootROM.
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*/
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hdr->init_size = ROUND(hdr->init_size, 4);
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/*
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* init_boot_size needs to be set, as it is read by the BootROM
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* to determine the size of the next-stage bootloader (e.g. U-Boot
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* proper), when used with the back-to-bootrom functionality.
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*
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* see https://lists.denx.de/pipermail/u-boot/2017-May/293267.html
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* for a more detailed explanation by Andy Yan
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*/
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hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE;
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rc4_encode(buf, RK_BLK_SIZE, rc4_key);
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}
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int rkcommon_set_header(void *buf, uint file_size,
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struct image_tool_params *params)
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{
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struct header1_info *hdr = buf + RK_SPL_HDR_START;
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if (file_size > rkcommon_get_spl_size(params))
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return -ENOSPC;
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rkcommon_set_header0(buf, file_size, params);
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/* Set up the SPL name (i.e. copy spl_hdr over) */
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memcpy(&hdr->magic, rkcommon_get_spl_hdr(params), RK_SPL_HDR_SIZE);
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if (rkcommon_need_rc4_spl(params))
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rkcommon_rc4_encode_spl(buf, RK_SPL_HDR_START,
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params->file_size - RK_SPL_HDR_START);
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return 0;
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}
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static inline unsigned rkcommon_offset_to_spi(unsigned offset)
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{
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/*
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* While SD/MMC images use a flat addressing, SPI images are padded
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* to use the first 2K of every 4K sector only.
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*/
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return ((offset & ~0x7ff) << 1) + (offset & 0x7ff);
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}
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static int rkcommon_parse_header(const void *buf, struct header0_info *header0,
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struct spl_info **spl_info)
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{
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unsigned hdr1_offset;
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struct header1_info *hdr1_sdmmc, *hdr1_spi;
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int i;
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if (spl_info)
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*spl_info = NULL;
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/*
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* The first header (hdr0) is always RC4 encoded, so try to decrypt
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* with the well-known key.
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*/
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memcpy((void *)header0, buf, sizeof(struct header0_info));
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rc4_encode((void *)header0, sizeof(struct header0_info), rc4_key);
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if (header0->signature != RK_SIGNATURE)
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return -EPROTO;
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/* We don't support RC4 encoded image payloads here, yet... */
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if (header0->disable_rc4 == 0)
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return -ENOSYS;
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hdr1_offset = header0->init_offset * RK_BLK_SIZE;
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hdr1_sdmmc = (struct header1_info *)(buf + hdr1_offset);
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hdr1_spi = (struct header1_info *)(buf +
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rkcommon_offset_to_spi(hdr1_offset));
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for (i = 0; i < ARRAY_SIZE(spl_infos); i++) {
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if (!memcmp(&hdr1_sdmmc->magic, spl_infos[i].spl_hdr, 4)) {
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if (spl_info)
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*spl_info = &spl_infos[i];
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return IH_TYPE_RKSD;
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} else if (!memcmp(&hdr1_spi->magic, spl_infos[i].spl_hdr, 4)) {
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if (spl_info)
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*spl_info = &spl_infos[i];
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return IH_TYPE_RKSPI;
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}
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}
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return -1;
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}
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int rkcommon_verify_header(unsigned char *buf, int size,
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struct image_tool_params *params)
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{
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struct header0_info header0;
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struct spl_info *img_spl_info, *spl_info;
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int ret;
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ret = rkcommon_parse_header(buf, &header0, &img_spl_info);
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/* If this is the (unimplemented) RC4 case, then rewrite the result */
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if (ret == -ENOSYS)
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return 0;
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if (ret < 0)
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return ret;
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/*
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* If no 'imagename' is specified via the commandline (e.g. if this is
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* 'dumpimage -l' w/o any further constraints), we accept any spl_info.
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*/
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if (params->imagename == NULL)
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return 0;
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/* Match the 'imagename' against the 'spl_hdr' found */
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spl_info = rkcommon_get_spl_info(params->imagename);
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if (spl_info && img_spl_info)
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return strcmp(spl_info->spl_hdr, img_spl_info->spl_hdr);
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return -ENOENT;
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}
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void rkcommon_print_header(const void *buf)
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{
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struct header0_info header0;
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struct spl_info *spl_info;
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uint8_t image_type;
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int ret;
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ret = rkcommon_parse_header(buf, &header0, &spl_info);
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/* If this is the (unimplemented) RC4 case, then fail silently */
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if (ret == -ENOSYS)
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return;
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if (ret < 0) {
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fprintf(stderr, "Error: image verification failed\n");
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return;
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}
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image_type = ret;
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printf("Image Type: Rockchip %s (%s) boot image\n",
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spl_info->spl_hdr,
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(image_type == IH_TYPE_RKSD) ? "SD/MMC" : "SPI");
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printf("Data Size: %d bytes\n", header0.init_size * RK_BLK_SIZE);
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}
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void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size)
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{
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unsigned int remaining = size;
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while (remaining > 0) {
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int step = (remaining > RK_BLK_SIZE) ? RK_BLK_SIZE : remaining;
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rc4_encode(buf + offset, step, rc4_key);
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offset += RK_BLK_SIZE;
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remaining -= step;
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}
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}
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int rkcommon_vrec_header(struct image_tool_params *params,
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struct image_type_params *tparams,
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unsigned int alignment)
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{
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unsigned int unpadded_size;
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unsigned int padded_size;
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/*
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* The SPL image looks as follows:
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*
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* 0x0 header0 (see rkcommon.c)
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* 0x800 spl_name ('RK30', ..., 'RK33')
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* (start of the payload for AArch64 payloads: we expect the
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* first 4 bytes to be available for overwriting with our
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* spl_name)
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* 0x804 first instruction to be executed
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* (start of the image/payload for 32bit payloads)
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*
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* For AArch64 (ARMv8) payloads, natural alignment (8-bytes) is
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* required for its sections (so the image we receive needs to
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* have the first 4 bytes reserved for the spl_name). Reserving
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* these 4 bytes is done using the BOOT0_HOOK infrastructure.
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*
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* The header is always at 0x800 (as we now use a payload
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* prepadded using the boot0 hook for all targets): the first
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* 4 bytes of these images can safely be overwritten using the
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* boot magic.
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*/
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tparams->header_size = RK_SPL_HDR_START;
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/* Allocate, clear and install the header */
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tparams->hdr = malloc(tparams->header_size);
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if (!tparams->hdr)
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return -ENOMEM;
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memset(tparams->hdr, 0, tparams->header_size);
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/*
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* If someone passed in 0 for the alignment, we'd better handle
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* it correctly...
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*/
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if (!alignment)
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alignment = 1;
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unpadded_size = tparams->header_size + params->file_size;
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padded_size = ROUND(unpadded_size, alignment);
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return padded_size - unpadded_size;
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}
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