arch/mips/lib/bootm_qemu_mips.c

   1 /*
   2  * (C) Copyright 2008
   3  * Jean-Christophe PLAGNIOL-VILLARD <jcplagniol@jcrosoft.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <command.h>
  10 #include <image.h>
  11 #include <asm/byteorder.h>
  12 #include <asm/addrspace.h>
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 int do_bootm_linux(int flag, int argc, char * const argv[],
  17                         bootm_headers_t *images)
  18 {
  19         void (*theKernel) (int, char **, char **, int *);
  20         char *bootargs = getenv("bootargs");
  21         char *start;
  22         uint len;
  23
  24         /* find kernel entry point */
  25         theKernel = (void (*)(int, char **, char **, int *))images->ep;
  26
  27         bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  28
  29         debug("## Transferring control to Linux (at address %08lx) ...\n",
  30                 (ulong) theKernel);
  31
  32         gd->bd->bi_boot_params = gd->bd->bi_memstart + (16 << 20) - 256;
  33         debug("%-12s= 0x%08lX\n", "boot_params", (ulong)gd->bd->bi_boot_params);
  34
  35         /* set Magic */
  36         *(int32_t *)(gd->bd->bi_boot_params - 4) = 0x12345678;
  37         /* set ram_size */
  38         *(int32_t *)(gd->bd->bi_boot_params - 8) = gd->ram_size;
  39
  40         start = (char *)gd->bd->bi_boot_params;
  41
  42         len = strlen(bootargs);
  43
  44         strncpy(start, bootargs, len + 1);
  45
  46         start += len;
  47
  48         len = images->rd_end - images->rd_start;
  49         if (len > 0) {
  50                 start += sprintf(start, " rd_start=0x%08X rd_size=0x%0X",
  51                 (uint) UNCACHED_SDRAM(images->rd_start),
  52                 (uint) len);
  53         }
  54
  55         /* we assume that the kernel is in place */
  56         printf("\nStarting kernel ...\n\n");
  57
  58         theKernel(0, NULL, NULL, 0);
  59
  60         /* does not return */
  61         return 1;
  62 }