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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google 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/mmu.h>
#include <assert.h>
#include <soc/addressmap.h>
#include <soc/mmu_operations.h>
#include <stdlib.h>
#include <stdint.h>
#include <symbols.h>
static void tegra210_mmu_config(void)
{
uint64_t start,end;
const unsigned long devmem = MA_DEV | MA_S | MA_RW;
const unsigned long cachedmem = MA_MEM | MA_NS | MA_RW;
const unsigned long secure_mem = MA_MEM | MA_S | MA_RW;
uintptr_t tz_base_mib;
size_t tz_size_mib;
print_carveouts();
memory_in_range_below_4gb(&start,&end);
/* Device memory below DRAM */
mmu_config_range((void *)TEGRA_ARM_LOWEST_PERIPH, start * MiB, devmem);
/* DRAM */
mmu_config_range((void *)(start * MiB), (end-start) * MiB, cachedmem);
memory_in_range_above_4gb(&start,&end);
mmu_config_range((void *)(start * MiB), (end-start) * MiB, cachedmem);
/* SRAM */
mmu_config_range(_sram, REGION_SIZE(sram), cachedmem);
/* Add TZ carveout. */
carveout_range(CARVEOUT_TZ, &tz_base_mib, &tz_size_mib);
mmu_config_range((void *)(tz_base_mib * MiB),
tz_size_mib * MiB, secure_mem);
}
void tegra210_mmu_init(void)
{
uintptr_t tz_base_mib;
size_t tz_size_mib;
mmu_init();
tegra210_mmu_config();
/*
* Page tables are at the end of the trust zone region, but we should
* double-check that memlayout and addressmap.c are in sync.
*
* TZDRAM layout is as follows:
*
* +--------------------------+ <----+DRAM_END
* | |
* | |
* | |
* +--------------------------+ <----+0x100000000
* | |
* | coreboot page tables |
* +--------------------------+
* | |
* | BL32 |
* +--------------------------+
* | |
* | BL31 |
* +--------------------------+ <----+TZDRAM_BASE
* | |
* | |
* | |
* | |
* +--------------------------+ <----+DRAM_BASE
*
*/
carveout_range(CARVEOUT_TZ, &tz_base_mib, &tz_size_mib);
assert((uintptr_t)_ttb + REGION_SIZE(ttb) == (tz_base_mib + tz_size_mib)
* MiB && REGION_SIZE(ttb) <= tz_size_mib * MiB);
mmu_enable();
}
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