diff options
| author | huang lin <hl@rock-chips.com> | 2016-03-03 15:29:34 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2016-04-05 13:34:47 +0200 |
| commit | 7b9bca0b2b1830262daffd16f285e868d241391b (patch) | |
| tree | c89de1ccd13adc983d2cb5aaef1fefbe4483632e /payloads/libpayload/arch/arm64 | |
| parent | 473e0c35fe2ecd70ed791936e65d8924f16e528c (diff) | |
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>
Diffstat (limited to 'payloads/libpayload/arch/arm64')
| -rw-r--r-- | payloads/libpayload/arch/arm64/mmu.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/payloads/libpayload/arch/arm64/mmu.c b/payloads/libpayload/arch/arm64/mmu.c index f07e4c435c..553b2d5fc2 100644 --- a/payloads/libpayload/arch/arm64/mmu.c +++ b/payloads/libpayload/arch/arm64/mmu.c @@ -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, |