Function lpae_map_phys_addr

payloads/libpayload/arch/arm/virtual.c:120–147

* Maps a 2MB designated block to a requested physical address, and returns * the address to the block or NULL on error. * * pa_mb: Physical address in MB. Has to be on a 2MB boundary. * policy: Data chache policy */

 * policy: Data chache policy
 */
void *lpae_map_phys_addr(unsigned long pa_mb, enum dcache_policy policy)
{
	pmd_t attr;

	if (!ttb_buff)
		lpae_map_init();

	switch(policy) {
	case DCACHE_OFF:
		attr = ATTR_NC;
		break;
	case DCACHE_WRITEBACK:
		attr = ATTR_WB;
		break;
	case DCACHE_WRITETHROUGH:
		attr = ATTR_WT;
		break;
	default:
		return NULL;
	}

	ttb_buff[work_block >> BLOCK_SHIFT] =
			((pmd_t)pa_mb/2 << BLOCK_SHIFT) | attr;

	lpae_flush_work_block();

	return (void *)work_block;
}

void lpae_restore_map(void)
{