board/MAI/AmigaOneG3SE/cmd_boota.c

   1 #include <common.h>
   2 #include <command.h>
   3 #include "../disk/part_amiga.h"
   4 #include <asm/cache.h>
   5
   6 DECLARE_GLOBAL_DATA_PTR;
   7
   8 #undef BOOTA_DEBUG
   9
  10 #ifdef BOOTA_DEBUG
  11 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  12 #else
  13 #define PRINTF(fmt,args...)
  14 #endif
  15
  16 struct block_header {
  17         u32 id;
  18         u32 summed_longs;
  19         s32 chk_sum;
  20 };
  21
  22 extern block_dev_desc_t *ide_get_dev (int dev);
  23 extern struct bootcode_block *get_bootcode (block_dev_desc_t * dev_desc);
  24 extern int sum_block (struct block_header *header);
  25
  26 struct bootcode_block bblk;
  27
  28 int do_boota (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  29 {
  30         unsigned char *load_address = (unsigned char *) CFG_LOAD_ADDR;
  31         unsigned char *base_address;
  32         unsigned long offset;
  33
  34         unsigned long part_number = 0;
  35         block_dev_desc_t *boot_disk;
  36         char *s;
  37         struct bootcode_block *boot_code;
  38
  39         /* Get parameters */
  40
  41         switch (argc) {
  42         case 2:
  43                 load_address = (unsigned char *) simple_strtol (argv[1], NULL, 16);
  44                 part_number = 0;
  45                 break;
  46         case 3:
  47                 load_address = (unsigned char *) simple_strtol (argv[1], NULL, 16);
  48                 part_number = simple_strtol (argv[2], NULL, 16);
  49                 break;
  50         }
  51
  52         base_address = load_address;
  53
  54         PRINTF ("Loading boot code from disk %d to %p\n", part_number,
  55                         load_address);
  56
  57         /* Find the appropriate disk device */
  58         boot_disk = ide_get_dev (part_number);
  59         if (!boot_disk) {
  60                 PRINTF ("Unknown disk %d\n", part_number);
  61                 return 1;
  62         }
  63
  64         /* Find the bootcode block */
  65         boot_code = get_bootcode (boot_disk);
  66         if (!boot_code) {
  67                 PRINTF ("Not a bootable disk %d\n", part_number);
  68                 return 1;
  69         }
  70
  71         /* Only use the offset from the first block */
  72         offset = boot_code->load_data[0];
  73         memcpy (load_address, &boot_code->load_data[1], 122 * 4);
  74         load_address += 122 * 4;
  75
  76         /* Setup for the loop */
  77         bblk.next = boot_code->next;
  78         boot_code = &bblk;
  79
  80         /* Scan the chain, and copy the loader succesively into the destination area */
  81         while (0xffffffff != boot_code->next) {
  82                 PRINTF ("Loading block %d\n", boot_code->next);
  83
  84                 /* Load block */
  85                 if (1 !=
  86                         boot_disk->block_read (boot_disk->dev, boot_code->next, 1,
  87                                                                    (ulong *) & bblk)) {
  88                         PRINTF ("Read error\n");
  89                         return 1;
  90                 }
  91
  92                 /* check sum */
  93                 if (sum_block ((struct block_header *) (ulong *) & bblk) != 0) {
  94                         PRINTF ("Checksum error\n");
  95                         return 1;
  96                 }
  97
  98                 /* Ok, concatenate it to the already loaded code */
  99                 memcpy (load_address, boot_code->load_data, 123 * 4);
 100                 load_address += 123 * 4;
 101         }
 102
 103         printf ("Bootcode loaded to %p (size %d)\n", base_address,
 104                         load_address - base_address);
 105         printf ("Entry point at %p\n", base_address + offset);
 106
 107         flush_cache (base_address, load_address - base_address);
 108
 109
 110         s = getenv ("autostart");
 111         if (s && strcmp (s, "yes") == 0) {
 112                 void (*boot) (bd_t *, char *, block_dev_desc_t *);
 113                 char *args;
 114
 115                 boot = (void (*)(bd_t *, char *, block_dev_desc_t *)) (base_address + offset);
 116                 boot (gd->bd, getenv ("amiga_bootargs"), boot_disk);
 117         }
 118
 119
 120         return 0;
 121 }
 122 #if defined(CONFIG_AMIGAONEG3SE) && (CONFIG_COMMANDS & CFG_CMD_BSP)
 123 U_BOOT_CMD(
 124         boota,   3,      1,      do_boota,
 125         "boota   - boot an Amiga kernel\n",
 126         "address disk"
 127 );
 128 #endif /* _CMD_BOOTA_H */