137 lines
2.6 KiB
C
137 lines
2.6 KiB
C
#include <common.h>
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#include <command.h>
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#include <fs.h>
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#include <of.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <malloc.h>
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#include <sizes.h>
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#include <asm/byteorder.h>
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#include <asm/armlinux.h>
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#include <asm/system.h>
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#include <asm-generic/memory_layout.h>
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#include <memory.h>
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struct zimage_header {
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u32 unused[9];
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u32 magic;
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u32 start;
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u32 end;
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};
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#define ZIMAGE_MAGIC 0x016F2818
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static int do_bootz(int argc, char *argv[])
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{
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int fd, ret, swap = 0;
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struct zimage_header __header, *header;
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void *zimage;
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void *oftree = NULL;
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u32 end;
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int usemap = 0;
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struct memory_bank *bank = list_first_entry(&memory_banks, struct memory_bank, list);
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struct resource *res = NULL;
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if (argc != 2)
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return COMMAND_ERROR_USAGE;
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fd = open(argv[1], O_RDONLY);
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if (fd < 0) {
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perror("open");
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return 1;
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}
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/*
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* We can save the memcpy of the zImage if it already is in
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* the first 128MB of SDRAM.
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*/
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zimage = memmap(fd, PROT_READ);
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if (zimage && (unsigned long)zimage >= bank->start &&
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(unsigned long)zimage < bank->start + SZ_128M) {
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usemap = 1;
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header = zimage;
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}
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if (!usemap) {
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header = &__header;
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ret = read(fd, header, sizeof(*header));
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if (ret < sizeof(*header)) {
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printf("could not read %s\n", argv[1]);
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goto err_out;
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}
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}
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switch (header->magic) {
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#ifdef CONFIG_BOOT_ENDIANNESS_SWITCH
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case swab32(ZIMAGE_MAGIC):
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swap = 1;
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/* fall through */
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#endif
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case ZIMAGE_MAGIC:
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break;
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default:
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printf("invalid magic 0x%08x\n", header->magic);
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goto err_out;
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}
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end = header->end;
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if (swap)
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end = swab32(end);
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if (!usemap) {
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if (bank->size <= SZ_128M) {
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zimage = xmalloc(end);
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} else {
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zimage = (void *)bank->start + SZ_8M;
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res = request_sdram_region("zimage",
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bank->start + SZ_8M, end);
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if (!res) {
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printf("can't request region for kernel\n");
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goto err_out1;
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}
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}
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memcpy(zimage, header, sizeof(*header));
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ret = read(fd, zimage + sizeof(*header), end - sizeof(*header));
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if (ret < end - sizeof(*header)) {
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printf("could not read %s\n", argv[1]);
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goto err_out2;
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}
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}
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if (swap) {
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void *ptr;
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for (ptr = zimage; ptr < zimage + end; ptr += 4)
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*(u32 *)ptr = swab32(*(u32 *)ptr);
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}
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printf("loaded zImage from %s with size %d\n", argv[1], end);
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#ifdef CONFIG_OFTREE
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oftree = of_get_fixed_tree(NULL);
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#endif
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start_linux(zimage, swap, 0, 0, oftree);
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return 0;
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err_out2:
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if (res)
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release_sdram_region(res);
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err_out1:
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free(zimage);
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err_out:
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close(fd);
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return 1;
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}
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BAREBOX_CMD_START(bootz)
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.cmd = do_bootz,
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BAREBOX_CMD_DESC("boot Linux zImage")
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BAREBOX_CMD_OPTS("FILE")
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BAREBOX_CMD_GROUP(CMD_GRP_BOOT)
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BAREBOX_CMD_END
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