diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/Kconfig | 6 | ||||
| -rw-r--r-- | common/Makefile | 1 | ||||
| -rw-r--r-- | common/cmd_armflash.c | 278 |
3 files changed, 285 insertions, 0 deletions
diff --git a/common/Kconfig b/common/Kconfig index e662774..4cde4b0 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -193,6 +193,12 @@ config CMD_FLASH erase - FLASH memory protect - enable or disable FLASH write protection +config CMD_ARMFLASH + depends on FLASH_CFI_DRIVER + bool "armflash" + help + ARM Ltd reference designs flash partition access + config CMD_NAND bool "nand" help diff --git a/common/Makefile b/common/Makefile index 7216a13..252fbf1 100644 --- a/common/Makefile +++ b/common/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_ENV_IS_NOWHERE) += env_nowhere.o # command obj-$(CONFIG_CMD_AES) += cmd_aes.o obj-$(CONFIG_CMD_AMBAPP) += cmd_ambapp.o +obj-$(CONFIG_CMD_ARMFLASH) += cmd_armflash.o obj-$(CONFIG_SOURCE) += cmd_source.o obj-$(CONFIG_CMD_SOURCE) += cmd_source.o obj-$(CONFIG_CMD_BDI) += cmd_bdinfo.o diff --git a/common/cmd_armflash.c b/common/cmd_armflash.c new file mode 100644 index 0000000..1db92b0 --- /dev/null +++ b/common/cmd_armflash.c @@ -0,0 +1,278 @@ +/* + * (C) Copyright 2015 + * Linus Walleij, Linaro + * + * Support for ARM Flash Partitions + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <command.h> +#include <asm/io.h> + +#define MAX_REGIONS 4 +#define MAX_IMAGES 32 + +struct afs_region { + u32 load_address; + u32 size; + u32 offset; +}; + +struct afs_image { + flash_info_t *flinfo; + const char *name; + u32 version; + u32 entrypoint; + u32 attributes; + u32 region_count; + struct afs_region regions[MAX_REGIONS]; + ulong flash_mem_start; + ulong flash_mem_end; +}; + +static struct afs_image afs_images[MAX_IMAGES]; +static int num_afs_images; + +static u32 compute_crc(ulong start, u32 len) +{ + u32 sum = 0; + int i; + + if (len % 4 != 0) { + printf("bad checksumming\n"); + return 0; + } + + for (i = 0; i < len; i += 4) { + u32 val; + + val = readl((void *)start + i); + if (val > ~sum) + sum++; + sum += val; + } + return ~sum; +} + +static void parse_bank(ulong bank) +{ + int i; + ulong flstart, flend; + flash_info_t *info; + + info = &flash_info[bank]; + if (info->flash_id != FLASH_MAN_CFI) { + printf("Bank %lu: missing or unknown FLASH type\n", bank); + return; + } + if (!info->sector_count) { + printf("Bank %lu: no FLASH sectors\n", bank); + return; + } + + flstart = info->start[0]; + flend = flstart + info->size; + + for (i = 0; i < info->sector_count; ++i) { + ulong secend; + u32 foot1, foot2; + + if (ctrlc()) + break; + + if (i == info->sector_count-1) + secend = flend; + else + secend = info->start[i+1]; + + /* Check for v1 header */ + foot1 = readl((void *)secend - 0x0c); + if (foot1 == 0xA0FFFF9FU) { + struct afs_image *afi = &afs_images[num_afs_images]; + ulong imginfo; + + afi->flinfo = info; + afi->version = 1; + afi->flash_mem_start = readl((void *)secend - 0x10); + afi->flash_mem_end = readl((void *)secend - 0x14); + afi->attributes = readl((void *)secend - 0x08); + /* Adjust to even address */ + imginfo = afi->flash_mem_end + afi->flash_mem_end % 4; + /* Record as a single region */ + afi->region_count = 1; + afi->regions[0].offset = readl((void *)imginfo + 0x04); + afi->regions[0].load_address = + readl((void *)imginfo + 0x08); + afi->regions[0].size = readl((void *)imginfo + 0x0C); + afi->entrypoint = readl((void *)imginfo + 0x10); + afi->name = (const char *)imginfo + 0x14; + num_afs_images++; + } + + /* Check for v2 header */ + foot1 = readl((void *)secend - 0x04); + foot2 = readl((void *)secend - 0x08); + /* This makes up the string "HSLFTOOF" flash footer */ + if (foot1 == 0x464F4F54U && foot2 == 0x464C5348U) { + struct afs_image *afi = &afs_images[num_afs_images]; + ulong imginfo; + u32 block_start, block_end; + int j; + + afi->flinfo = info; + afi->version = readl((void *)secend - 0x0c); + imginfo = secend - 0x30 - readl((void *)secend - 0x10); + afi->name = (const char *)secend - 0x30; + + afi->entrypoint = readl((void *)imginfo+0x08); + afi->attributes = readl((void *)imginfo+0x0c); + afi->region_count = readl((void *)imginfo+0x10); + block_start = readl((void *)imginfo+0x54); + block_end = readl((void *)imginfo+0x58); + afi->flash_mem_start = afi->flinfo->start[block_start]; + afi->flash_mem_end = afi->flinfo->start[block_end]; + + /* + * Check footer CRC, the algorithm saves the inverse + * checksum as part of the summed words, and thus + * the result should be zero. + */ + if (compute_crc(imginfo + 8, 0x88) != 0) { + printf("BAD CRC on ARM image info\n"); + printf("(continuing anyway)\n"); + } + + /* Parse regions */ + for (j = 0; j < afi->region_count; j++) { + afi->regions[j].load_address = + readl((void *)imginfo+0x14 + j*0x10); + afi->regions[j].size = + readl((void *)imginfo+0x18 + j*0x10); + afi->regions[j].offset = + readl((void *)imginfo+0x1c + j*0x10); + /* + * At offset 0x20 + j*0x10 there is a region + * checksum which seems to be the running + * sum + 3, however since we anyway checksum + * the entire footer this is skipped over for + * checking here. + */ + } + num_afs_images++; + } + } +} + +static void parse_flash(void) +{ + ulong bank; + + /* We have already parsed the images in flash */ + if (num_afs_images > 0) + return; + for (bank = 0; bank < CONFIG_SYS_MAX_FLASH_BANKS; ++bank) + parse_bank(bank); +} + +static void load_image(const char * const name, const ulong address) +{ + struct afs_image *afi = NULL; + int i; + + parse_flash(); + for (i = 0; i < num_afs_images; i++) { + struct afs_image *tmp = &afs_images[i]; + + if (!strcmp(tmp->name, name)) { + afi = tmp; + break; + } + } + if (!afi) { + printf("image \"%s\" not found in flash\n", name); + return; + } + + for (i = 0; i < afi->region_count; i++) { + ulong from, to; + + from = afi->flash_mem_start + afi->regions[i].offset; + if (address) { + to = address; + } else if (afi->regions[i].load_address) { + to = afi->regions[i].load_address; + } else { + printf("no valid load address\n"); + return; + } + + memcpy((void *)to, (void *)from, afi->regions[i].size); + + printf("loaded region %d from %08lX to %08lX, %08X bytes\n", + i, + from, + to, + afi->regions[i].size); + } +} + +static void print_images(void) +{ + int i; + + parse_flash(); + for (i = 0; i < num_afs_images; i++) { + struct afs_image *afi = &afs_images[i]; + int j; + + printf("Image: \"%s\" (v%d):\n", afi->name, afi->version); + printf(" Entry point: 0x%08X\n", afi->entrypoint); + printf(" Attributes: 0x%08X: ", afi->attributes); + if (afi->attributes == 0x01) + printf("ARM executable"); + if (afi->attributes == 0x08) + printf("ARM backup"); + printf("\n"); + printf(" Flash mem start: 0x%08lX\n", + afi->flash_mem_start); + printf(" Flash mem end: 0x%08lX\n", + afi->flash_mem_end); + for (j = 0; j < afi->region_count; j++) { + printf(" region %d\n" + " load address: %08X\n" + " size: %08X\n" + " offset: %08X\n", + j, + afi->regions[j].load_address, + afi->regions[j].size, + afi->regions[j].offset); + } + } +} + +static int do_afs(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + if (argc == 1) { + print_images(); + } else if (argc == 3 && !strcmp(argv[1], "load")) { + load_image(argv[2], 0x0); + } else if (argc == 4 && !strcmp(argv[1], "load")) { + ulong load_addr; + + load_addr = simple_strtoul(argv[3], NULL, 16); + load_image(argv[2], load_addr); + } else { + return CMD_RET_USAGE; + } + + return 0; +} + +U_BOOT_CMD(afs, 4, 0, do_afs, "show AFS partitions", + "no arguments\n" + " - list images in flash\n" + "load <image>\n" + " - load an image to the location indicated in the header\n" + "load <image> 0x<address>\n" + " - load an image to the location specified\n"); 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