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libpayload: mmu: Initialize the base 4GiB as device memory 

This allows to accommodate different platforms' default
configurations, memory configuration is fine tuned later during boot
process.

BUG=chrome-os-partner:51537
BRANCH=none
TEST=none yet, the full stack of patches boots fine on EVB

Change-Id: I39da4ce247422f67451711ac0ed5a5e1119ed836
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 97a9a71ade4df8a501043f9ae58463a3135e2a4f
Original-Change-Id: I39da4ce247422f67451711ac0ed5a5e1119ed836
Original-Signed-off-by: huang lin <hl@rock-chips.com>
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/332384
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/13914
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
huang lin 2016-03-03 15:29:34 +08:00 committed by Patrick Georgi
parent 473e0c35fe
commit 7b9bca0b2b
1 changed files with 9 additions and 2 deletions
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11
payloads/libpayload/arch/arm64/mmu.c
View File

@ -260,7 +260,7 @@ void mmu_config_range(void *start, size_t size, uint64_t tag)
* Desc : Initialize mmu based on the mmu_memrange passed. ttb_buffer is used as
* the base address for xlat tables. TTB_DEFAULT_SIZE defines the max number of
* tables that can be used
* Assuming that memory 0-2GiB is device memory.
* Assuming that memory 0-4GiB is device memory.
*/
uint64_t mmu_init(struct mmu_ranges *mmu_ranges)
{
@ -275,7 +275,14 @@ uint64_t mmu_init(struct mmu_ranges *mmu_ranges)
printf("Libpayload ARM64: TTB_BUFFER: 0x%p Max Tables: %d\n",
(void*)xlat_addr, max_tables);
mmu_config_range(NULL, 0x80000000, TYPE_DEV_MEM);
/*
* To keep things simple we start with mapping the entire base 4GB as
* device memory. This accommodates various architectures' default
* settings (for instance rk3399 mmio starts at 0xf8000000); it is
* fine tuned (e.g. mapping DRAM areas as write-back) later in the
* boot process.
*/
mmu_config_range(NULL, 0x100000000, TYPE_DEV_MEM);
for (; i < mmu_ranges->used; i++)
mmu_config_range((void *)mmu_ranges->entries[i].base,