Uint8 self_check(){
if(check_code()!=E_OK)
return E_ERR;
if(check_rom()!=E_OK)
return E_ERR;
if(check_ram()!=E_OK)
return E_ERR;
if(check_eeprom()!=E_OK)
return E_ERR;
if(check_ad()!=E_OK)
return E_ERR;
return E_OK;
}
phys_size_t initdram(int board_type)
{
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
long int size;
upmconfig(UPMB, (uint *) sdram_table, sizeof(sdram_table) / sizeof(uint));
/*
* Preliminary prescaler for refresh
*/
memctl->memc_mptpr = MPTPR_PTP_DIV8;
memctl->memc_mar = MAR_SDRAM_INIT; /* 32-bit address to be output on the address bus if AMX = 0b11 */
/*
* Map controller bank 3 to the SDRAM bank at preliminary address.
*/
memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM;
memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM;
memctl->memc_mbmr = CONFIG_SYS_MAMR & ~MAMR_PTAE; /* no refresh yet */
udelay(200);
/* perform SDRAM initialisation sequence */
memctl->memc_mcr = MCR_OP_RUN | MCR_UPM_B | MCR_MB_CS3 | MCR_MLCF(1) | MCR_MAD(0x3C); /* precharge all */
udelay(1);
memctl->memc_mcr = MCR_OP_RUN | MCR_UPM_B | MCR_MB_CS3 | MCR_MLCF(2) | MCR_MAD(0x30); /* refresh 2 times(0) */
udelay(1);
memctl->memc_mcr = MCR_OP_RUN | MCR_UPM_B | MCR_MB_CS3 | MCR_MLCF(1) | MCR_MAD(0x3E); /* exception program (write mar)*/
udelay(1);
memctl->memc_mbmr |= MAMR_PTAE; /* enable refresh */
udelay(10000);
{
u32 d1, d2;
d1 = 0xAA55AA55;
*(volatile u32 *)0 = d1;
d2 = *(volatile u32 *)0;
if (d1 != d2) {
printf("DRAM fails: wrote 0x%08x read 0x%08x\n", d1, d2);
hang();
}
d1 = 0x55AA55AA;
*(volatile u32 *)0 = d1;
d2 = *(volatile u32 *)0;
if (d1 != d2) {
printf("DRAM fails: wrote 0x%08x read 0x%08x\n", d1, d2);
hang();
}
}
size = get_ram_size((long *)0, SDRAM_MAX_SIZE);
#if 0
printf("check 0\n");
check_ram(( 0 << 20), (2 << 20));
printf("check 16\n");
check_ram((16 << 20), (2 << 20));
printf("check 32\n");
check_ram((32 << 20), (2 << 20));
printf("check 48\n");
check_ram((48 << 20), (2 << 20));
#endif
if (size == 0) {
printf("SIZE is zero: LOOP on 0\n");
for (;;) {
*(volatile u32 *)0 = 0;
(void)*(volatile u32 *)0;
}
}
return size;
}
