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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
300 lines
7.0 KiB
C
300 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015
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* Linus Walleij, Linaro
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*
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* Support for ARM Flash Partitions
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*/
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#include <common.h>
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#include <command.h>
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#include <console.h>
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#include <asm/io.h>
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#define MAX_REGIONS 4
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#define MAX_IMAGES 32
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struct afs_region {
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u32 load_address;
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u32 size;
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u32 offset;
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};
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struct afs_image {
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flash_info_t *flinfo;
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const char *name;
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u32 version;
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u32 entrypoint;
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u32 attributes;
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u32 region_count;
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struct afs_region regions[MAX_REGIONS];
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ulong flash_mem_start;
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ulong flash_mem_end;
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};
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static struct afs_image afs_images[MAX_IMAGES];
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static int num_afs_images;
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static u32 compute_crc(ulong start, u32 len)
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{
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u32 sum = 0;
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int i;
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if (len % 4 != 0) {
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printf("bad checksumming\n");
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return 0;
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}
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for (i = 0; i < len; i += 4) {
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u32 val;
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val = readl((void *)start + i);
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if (val > ~sum)
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sum++;
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sum += val;
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}
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return ~sum;
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}
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static void parse_bank(ulong bank)
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{
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int i;
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ulong flstart, flend;
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flash_info_t *info;
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info = &flash_info[bank];
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if (info->flash_id != FLASH_MAN_CFI) {
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printf("Bank %lu: missing or unknown FLASH type\n", bank);
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return;
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}
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if (!info->sector_count) {
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printf("Bank %lu: no FLASH sectors\n", bank);
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return;
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}
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flstart = info->start[0];
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flend = flstart + info->size;
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for (i = 0; i < info->sector_count; ++i) {
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ulong secend;
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u32 foot1, foot2;
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if (ctrlc())
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break;
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if (i == info->sector_count-1)
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secend = flend;
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else
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secend = info->start[i+1];
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/* Check for v1 header */
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foot1 = readl((void *)secend - 0x0c);
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if (foot1 == 0xA0FFFF9FU) {
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struct afs_image *afi = &afs_images[num_afs_images];
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ulong imginfo;
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afi->flinfo = info;
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afi->version = 1;
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afi->flash_mem_start = readl((void *)secend - 0x10);
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afi->flash_mem_end = readl((void *)secend - 0x14);
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afi->attributes = readl((void *)secend - 0x08);
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/* Adjust to even address */
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imginfo = afi->flash_mem_end + afi->flash_mem_end % 4;
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/* Record as a single region */
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afi->region_count = 1;
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afi->regions[0].offset = readl((void *)imginfo + 0x04);
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afi->regions[0].load_address =
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readl((void *)imginfo + 0x08);
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afi->regions[0].size = readl((void *)imginfo + 0x0C);
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afi->entrypoint = readl((void *)imginfo + 0x10);
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afi->name = (const char *)imginfo + 0x14;
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num_afs_images++;
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}
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/* Check for v2 header */
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foot1 = readl((void *)secend - 0x04);
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foot2 = readl((void *)secend - 0x08);
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/* This makes up the string "HSLFTOOF" flash footer */
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if (foot1 == 0x464F4F54U && foot2 == 0x464C5348U) {
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struct afs_image *afi = &afs_images[num_afs_images];
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ulong imginfo;
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u32 block_start, block_end;
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int j;
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afi->flinfo = info;
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afi->version = readl((void *)secend - 0x0c);
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imginfo = secend - 0x30 - readl((void *)secend - 0x10);
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afi->name = (const char *)secend - 0x30;
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afi->entrypoint = readl((void *)imginfo+0x08);
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afi->attributes = readl((void *)imginfo+0x0c);
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afi->region_count = readl((void *)imginfo+0x10);
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block_start = readl((void *)imginfo+0x54);
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block_end = readl((void *)imginfo+0x58);
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afi->flash_mem_start = afi->flinfo->start[block_start];
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afi->flash_mem_end = afi->flinfo->start[block_end];
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/*
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* Check footer CRC, the algorithm saves the inverse
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* checksum as part of the summed words, and thus
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* the result should be zero.
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*/
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if (compute_crc(imginfo + 8, 0x88) != 0) {
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printf("BAD CRC on ARM image info\n");
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printf("(continuing anyway)\n");
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}
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/* Parse regions */
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for (j = 0; j < afi->region_count; j++) {
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afi->regions[j].load_address =
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readl((void *)imginfo+0x14 + j*0x10);
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afi->regions[j].size =
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readl((void *)imginfo+0x18 + j*0x10);
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afi->regions[j].offset =
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readl((void *)imginfo+0x1c + j*0x10);
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/*
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* At offset 0x20 + j*0x10 there is a region
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* checksum which seems to be the running
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* sum + 3, however since we anyway checksum
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* the entire footer this is skipped over for
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* checking here.
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*/
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}
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num_afs_images++;
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}
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}
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}
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static void parse_flash(void)
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{
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ulong bank;
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/* We have already parsed the images in flash */
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if (num_afs_images > 0)
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return;
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for (bank = 0; bank < CONFIG_SYS_MAX_FLASH_BANKS; ++bank)
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parse_bank(bank);
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}
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static int load_image(const char * const name, const ulong address)
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{
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struct afs_image *afi = NULL;
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int i;
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parse_flash();
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for (i = 0; i < num_afs_images; i++) {
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struct afs_image *tmp = &afs_images[i];
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if (!strcmp(tmp->name, name)) {
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afi = tmp;
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break;
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}
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}
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if (!afi) {
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printf("image \"%s\" not found in flash\n", name);
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return CMD_RET_FAILURE;
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}
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for (i = 0; i < afi->region_count; i++) {
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ulong from, to;
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from = afi->flash_mem_start + afi->regions[i].offset;
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if (address) {
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to = address;
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} else if (afi->regions[i].load_address) {
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to = afi->regions[i].load_address;
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} else {
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printf("no valid load address\n");
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return CMD_RET_FAILURE;
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}
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memcpy((void *)to, (void *)from, afi->regions[i].size);
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printf("loaded region %d from %08lX to %08lX, %08X bytes\n",
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i,
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from,
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to,
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afi->regions[i].size);
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}
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return CMD_RET_SUCCESS;
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}
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static void print_images(void)
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{
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int i;
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parse_flash();
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for (i = 0; i < num_afs_images; i++) {
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struct afs_image *afi = &afs_images[i];
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int j;
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printf("Image: \"%s\" (v%d):\n", afi->name, afi->version);
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printf(" Entry point: 0x%08X\n", afi->entrypoint);
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printf(" Attributes: 0x%08X: ", afi->attributes);
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if (afi->attributes == 0x01)
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printf("ARM executable");
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if (afi->attributes == 0x08)
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printf("ARM backup");
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printf("\n");
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printf(" Flash mem start: 0x%08lX\n",
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afi->flash_mem_start);
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printf(" Flash mem end: 0x%08lX\n",
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afi->flash_mem_end);
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for (j = 0; j < afi->region_count; j++) {
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printf(" region %d\n"
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" load address: %08X\n"
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" size: %08X\n"
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" offset: %08X\n",
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j,
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afi->regions[j].load_address,
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afi->regions[j].size,
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afi->regions[j].offset);
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}
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}
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}
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static int exists(const char * const name)
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{
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int i;
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parse_flash();
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for (i = 0; i < num_afs_images; i++) {
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struct afs_image *afi = &afs_images[i];
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if (strcmp(afi->name, name) == 0)
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return CMD_RET_SUCCESS;
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}
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return CMD_RET_FAILURE;
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}
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static int do_afs(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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int ret = CMD_RET_SUCCESS;
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if (argc == 1) {
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print_images();
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} else if (argc == 3 && !strcmp(argv[1], "exists")) {
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ret = exists(argv[2]);
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} else if (argc == 3 && !strcmp(argv[1], "load")) {
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ret = load_image(argv[2], 0x0);
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} else if (argc == 4 && !strcmp(argv[1], "load")) {
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ulong load_addr;
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load_addr = simple_strtoul(argv[3], NULL, 16);
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ret = load_image(argv[2], load_addr);
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} else {
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return CMD_RET_USAGE;
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}
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return ret;
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}
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U_BOOT_CMD(afs, 4, 0, do_afs, "show AFS partitions",
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"no arguments\n"
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" - list images in flash\n"
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"exists <image>\n"
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" - returns 1 if an image exists, else 0\n"
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"load <image>\n"
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" - load an image to the location indicated in the header\n"
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"load <image> 0x<address>\n"
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" - load an image to the location specified\n");
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