/*
* cleanup_before_linx: Prepares the processor for linux
*/
int cleanup_before_linux (void)
{
printf("system cleanup before entering linux ...\n");
// (1) make sure the cache is off (turn off I/D-cache)
// (2) make sure the cache is clean (flush I/D-cache)
printf(" > clean cpu env\n");
cpu_clean_env();
/* CC: remove temporarily for MT6573 porting */
#if 1
// (3) deinit leds
printf(" > deinit leds..\n");
leds_deinit();
#endif
// (4) power off some unused LDO
printf(" > perform power saving\n");
Uboot_power_saving();
return (0);
}
int cleanup_before_linux(void)
{
unsigned int i;
printf(" > deinit leds..\n");
leds_deinit();
/*
* this function is called just before we call linux
* it prepares the processor for linux
*
* we turn off caches etc ...
*/
disable_interrupts();
/* turn off I/D-cache */
icache_disable();
dcache_disable();
/* invalidate I-cache */
cache_flush();
#ifndef CONFIG_L2_OFF
/* turn off L2 cache */
l2_cache_disable();
/* invalidate L2 cache also */
invalidate_dcache(get_device_type());
#endif
i = 0;
/* mem barrier to sync up things */
asm("mcr p15, 0, %0, c7, c10, 4": :"r"(i));
#ifndef CONFIG_L2_OFF
l2_cache_enable();
#endif
return 0;
}
void platform_uninit(void)
{
leds_deinit();
platform_deinit_interrupts();
}
