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authorhuang lin <hl@rock-chips.com>2016-03-03 15:29:34 +0800
committerPatrick Georgi <pgeorgi@google.com>2016-04-05 13:34:47 +0200
commit7b9bca0b2b1830262daffd16f285e868d241391b (patch)
treec89de1ccd13adc983d2cb5aaef1fefbe4483632e /payloads
parent473e0c35fe2ecd70ed791936e65d8924f16e528c (diff)
downloadcoreboot-7b9bca0b2b1830262daffd16f285e868d241391b.tar.xz
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')
-rw-r--r--payloads/libpayload/arch/arm64/mmu.c11
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,