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#include <common.h>
#include <command.h>
#include "../disk/part_amiga.h"
#include <asm/cache.h>
DECLARE_GLOBAL_DATA_PTR;
#undef BOOTA_DEBUG
#ifdef BOOTA_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
struct block_header {
u32 id;
u32 summed_longs;
s32 chk_sum;
};
extern block_dev_desc_t *ide_get_dev (int dev);
extern struct bootcode_block *get_bootcode (block_dev_desc_t * dev_desc);
extern int sum_block (struct block_header *header);
struct bootcode_block bblk;
int do_boota (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
unsigned char *load_address = (unsigned char *) CFG_LOAD_ADDR;
unsigned char *base_address;
unsigned long offset;
unsigned long part_number = 0;
block_dev_desc_t *boot_disk;
char *s;
struct bootcode_block *boot_code;
/* Get parameters */
switch (argc) {
case 2:
load_address = (unsigned char *) simple_strtol (argv[1], NULL, 16);
part_number = 0;
break;
case 3:
load_address = (unsigned char *) simple_strtol (argv[1], NULL, 16);
part_number = simple_strtol (argv[2], NULL, 16);
break;
}
base_address = load_address;
PRINTF ("Loading boot code from disk %d to %p\n", part_number,
load_address);
/* Find the appropriate disk device */
boot_disk = ide_get_dev (part_number);
if (!boot_disk) {
PRINTF ("Unknown disk %d\n", part_number);
return 1;
}
/* Find the bootcode block */
boot_code = get_bootcode (boot_disk);
if (!boot_code) {
PRINTF ("Not a bootable disk %d\n", part_number);
return 1;
}
/* Only use the offset from the first block */
offset = boot_code->load_data[0];
memcpy (load_address, &boot_code->load_data[1], 122 * 4);
load_address += 122 * 4;
/* Setup for the loop */
bblk.next = boot_code->next;
boot_code = &bblk;
/* Scan the chain, and copy the loader succesively into the destination area */
while (0xffffffff != boot_code->next) {
PRINTF ("Loading block %d\n", boot_code->next);
/* Load block */
if (1 !=
boot_disk->block_read (boot_disk->dev, boot_code->next, 1,
(ulong *) & bblk)) {
PRINTF ("Read error\n");
return 1;
}
/* check sum */
if (sum_block ((struct block_header *) (ulong *) & bblk) != 0) {
PRINTF ("Checksum error\n");
return 1;
}
/* Ok, concatenate it to the already loaded code */
memcpy (load_address, boot_code->load_data, 123 * 4);
load_address += 123 * 4;
}
printf ("Bootcode loaded to %p (size %d)\n", base_address,
load_address - base_address);
printf ("Entry point at %p\n", base_address + offset);
flush_cache (base_address, load_address - base_address);
s = getenv ("autostart");
if (s && strcmp (s, "yes") == 0) {
void (*boot) (bd_t *, char *, block_dev_desc_t *);
char *args;
boot = (void (*)(bd_t *, char *, block_dev_desc_t *)) (base_address + offset);
boot (gd->bd, getenv ("amiga_bootargs"), boot_disk);
}
return 0;
}
#if defined(CONFIG_AMIGAONEG3SE) && (CONFIG_COMMANDS & CFG_CMD_BSP)
U_BOOT_CMD(
boota, 3, 1, do_boota,
"boota - boot an Amiga kernel\n",
"address disk"
);
#endif /* _CMD_BOOTA_H */
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