static void setup_mem_atag(unsigned int start, size_t len)
{
params->hdr.tag = ATAG_MEM; /* Memory tag */
params->hdr.size = atag_size(atag_mem); /* size tag */
params->u.mem.start = start; /* Start of memory area (physical address) */
params->u.mem.size = len; /* Length of area */
params = atag_next(params); /* move pointer to next tag */
}
static void setup_initrd2_atag(unsigned int start, size_t size)
{
params->hdr.tag = ATAG_INITRD2; /* Initrd2 tag */
params->hdr.size = atag_size(atag_initrd2); /* size tag */
params->u.initrd2.start = start; /* physical start */
params->u.initrd2.size = size; /* compressed ramdisk size */
params = atag_next(params); /* move pointer to next tag */
}
static void setup_ramdisk_atag(size_t size)
{
params->hdr.tag = ATAG_RAMDISK; /* Ramdisk tag */
params->hdr.size = atag_size(atag_ramdisk); /* size tag */
params->u.ramdisk.flags = 0; /* Load the ramdisk */
params->u.ramdisk.size = size; /* Decompressed ramdisk size */
params->u.ramdisk.start = 0; /* Unused */
params = atag_next(params); /* move pointer to next tag */
}
static void setup_core_atag(void * address, long pagesize)
{
params = (struct atag *)address; /* Initialise parameters to start at given address */
params->hdr.tag = ATAG_CORE; /* start with the core tag */
params->hdr.size = atag_size(atag_core); /* size the tag */
params->u.core.flags = 1; /* ensure read-only */
params->u.core.pagesize = pagesize; /* systems pagesize (4k) */
params->u.core.rootdev = 0; /* zero root device (typicaly overidden from commandline )*/
params = atag_next(params); /* move pointer to next tag */
}
static void setup_cmdline_atag(const char * line)
{
int linelen = strlen(line);
if(!linelen)
return; /* do not insert a tag for an empty commandline */
params->hdr.tag = ATAG_CMDLINE; /* Commandline tag */
params->hdr.size = (sizeof(struct atag_header) + linelen + 1 + 4) >> 2;
strcpy(params->u.cmdline.cmdline,line); /* place commandline into tag */
params = atag_next(params); /* move pointer to next tag */
}
int main(void (*sr_read)(unsigned int start_sector,
char *buffer, int num_sectors),
void (*ser_puts)(const char *buffer))
{
char *dst = (char *)LINUX_LOADADDR;
const struct mbr_part *part;
unsigned found = 0;
unsigned int i;
BUILD_BUG_ON(sizeof(struct mbr_part) != 16);
BUILD_BUG_ON(sizeof(struct mbr) != SECT_SIZE);
if (mbr->sig != MBR_SIG) {
ser_puts("S");
die();
}
for (i = 0; i < NUM_PE; i++) {
part = &mbr->pe[i];
/* First partition is Linux */
if (part->type != PART_TYPE_OTHER_DATA) {
ser_puts("P");
continue;
}
ser_puts("L");
sr_read(part->lba, dst, part->num_sects);
ser_puts(".\r\n");
found = 1;
break;
}
if (!found) {
dbg_str("N");
die();
}
/* Prepare ATAGS */
atags->hdr.tag = ATAG_CORE;
atags->hdr.size = atag_size(atag_core);
atags->u.core.flags = 1;
atags->u.core.pagesize = 4096;
atags->u.core.rootdev = 0;
atags = atag_next(atags);
#if (SDRAM_SIZE_MB > 32)
#error "Need to add additional ATAG_MEM for second bank!"
#endif
atags->hdr.tag = ATAG_MEM;
atags->hdr.size = atag_size(atag_mem);
atags->u.mem.start = 0;
atags->u.mem.size = 8 << 20;
atags = atag_next(atags);
atags->hdr.tag = ATAG_MEM;
atags->hdr.size = atag_size(atag_mem);
atags->u.mem.start = 0x1000000;
atags->u.mem.size = 8 << 20;
atags = atag_next(atags);
atags->hdr.tag = ATAG_MEM;
atags->hdr.size = atag_size(atag_mem);
atags->u.mem.start = 0x4000000;
atags->u.mem.size = 8 << 20;
atags = atag_next(atags);
atags->hdr.tag = ATAG_MEM;
atags->hdr.size = atag_size(atag_mem);
atags->u.mem.start = 0x5000000;
atags->u.mem.size = 8 << 20;
atags = atag_next(atags);
atags->hdr.tag = ATAG_NONE;
atags->hdr.size = 0;
/* Start kernel, bye! */
ser_puts("G\r\n");
void (*kernel_start)(int, int, uint32_t) = (void *)LINUX_LOADADDR;
kernel_start(0, TS72XX_MACH_NUM, ATAGS_OFFSET);
return 0;
}
