70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* Copyright 2015 MediaTek Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <arch/io.h>
|
|
#include <arch/mmu.h>
|
|
#include <console/console.h>
|
|
#include <symbols.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <soc/addressmap.h>
|
|
#include <soc/emi.h>
|
|
#include <soc/infracfg.h>
|
|
#include <soc/mcucfg.h>
|
|
#include <soc/mmu_operations.h>
|
|
|
|
void mt8173_mmu_init(void)
|
|
{
|
|
mmu_init();
|
|
|
|
/* Set 0x0 to the end of 2GB dram address as device memory */
|
|
mmu_config_range((void *)0, (uintptr_t)_dram + 2U * GiB, DEV_MEM);
|
|
|
|
/* SRAM is cached */
|
|
mmu_config_range(_sram_l2c, _sram_l2c_size + _sram_size, CACHED_MEM);
|
|
|
|
/* DMA is non-cached and is reserved for TPM & da9212 I2C DMA */
|
|
mmu_config_range(_dma_coherent, _dma_coherent_size, UNCACHED_MEM);
|
|
|
|
/* set ttb as secure */
|
|
mmu_config_range(_ttb, _ttb_size, SECURE_MEM);
|
|
|
|
mmu_enable();
|
|
}
|
|
|
|
void mt8173_mmu_after_dram(void)
|
|
{
|
|
/* Map DRAM as cached now that it's up and running */
|
|
mmu_config_range(_dram, (uintptr_t)sdram_size(), CACHED_MEM);
|
|
|
|
/* Unmap L2C SRAM so it can be reclaimed by L2 cache */
|
|
/* TODO: Implement true unmapping, and also use it for the zero-page! */
|
|
mmu_config_range(_sram_l2c, _sram_l2c_size, DEV_MEM);
|
|
|
|
mmu_config_range(_dram_dma, _dram_dma_size, UNCACHED_MEM);
|
|
|
|
/* Careful: changing cache geometry while it's active is a bad idea! */
|
|
mmu_disable();
|
|
|
|
/* Return L2C SRAM back to L2 cache. Set it to 512KiB which is the max
|
|
* available L2 cache for A53 in MT8173. */
|
|
write32(&mt8173_mcucfg->mp0_ca7l_cache_config, 3 << 8);
|
|
/* turn off the l2c sram clock */
|
|
write32(&mt8173_infracfg->infra_pdn0, L2C_SRAM_PDN);
|
|
|
|
/* Reenable MMU with now enlarged L2 cache. Page tables still valid. */
|
|
mmu_enable();
|
|
}
|