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author | Linus Walleij <linus.walleij@linaro.org> | 2015-03-23 11:06:11 +0100 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2015-03-28 12:07:45 -0400 |
commit | 202a674bb8b7d7867503224857a2b0e04617d9b3 (patch) | |
tree | eb8cfaeb9ed0ce210212115c538323a255d53312 /arch/arm | |
parent | e769f68613ee4f84c8e2aea784335df74ceea397 (diff) | |
download | u-boot-imx-202a674bb8b7d7867503224857a2b0e04617d9b3.zip u-boot-imx-202a674bb8b7d7867503224857a2b0e04617d9b3.tar.gz u-boot-imx-202a674bb8b7d7867503224857a2b0e04617d9b3.tar.bz2 |
armv8: semihosting: add a command to load semihosted images
Instead of sprinkling custom code and calls over the Vexpress64
boardfile, create a command that loads images using semihosting
just like we would load from flash memory of over the network,
using a special command:
smhload <image> <address>
This will make it possible to remove some custom calls and
code and make the boot easier.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/lib/semihosting.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/arm/lib/semihosting.c b/arch/arm/lib/semihosting.c index d3f724b..edacb11 100644 --- a/arch/arm/lib/semihosting.c +++ b/arch/arm/lib/semihosting.c @@ -13,6 +13,7 @@ * for them. */ #include <common.h> +#include <command.h> #include <asm/semihosting.h> #define SYSOPEN 0x01 @@ -234,3 +235,72 @@ long smh_len(const char *fname) /* Return the file length (or -1 error indication) */ return len; } + +static int smh_load_file(const char * const name, ulong load_addr, + ulong *end_addr) +{ + long fd; + long len; + long ret; + + fd = smh_open(name, "rb"); + if (fd == -1) + return -1; + + len = smh_len_fd(fd); + if (len < 0) { + smh_close(fd); + return -1; + } + + ret = smh_read(fd, (void *)load_addr, len); + smh_close(fd); + + if (ret == 0) { + *end_addr = load_addr + len - 1; + printf("loaded file %s from %08lX to %08lX, %08lX bytes\n", + name, + load_addr, + *end_addr, + len); + } else { + printf("read failed\n"); + return 0; + } + + return 0; +} + +static int do_smhload(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + if (argc == 3 || argc == 4) { + ulong load_addr; + ulong end_addr = 0; + ulong ret; + char end_str[64]; + + load_addr = simple_strtoul(argv[2], NULL, 16); + if (!load_addr) + return -1; + + ret = smh_load_file(argv[1], load_addr, &end_addr); + if (ret < 0) + return 1; + + /* Optionally save returned end to the environment */ + if (argc == 4) { + sprintf(end_str, "0x%08lx", end_addr); + setenv(argv[3], end_str); + } + } else { + return CMD_RET_USAGE; + } + return 0; +} + +U_BOOT_CMD(smhload, 4, 0, do_smhload, "load a file using semihosting", + "<file> 0x<address> [end var]\n" + " - load a semihosted file to the address specified\n" + " if the optional [end var] is specified, the end\n" + " address of the file will be stored in this environment\n" + " variable.\n"); |