Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8800
-gerrit
commit 1b7e44ff73b43aca65bc6a1ab6b00a7c4157362b Author: Furquan Shaikh furquan@google.com Date: Sat Jan 31 23:24:32 2015 -0800
libpayload arm64: Allow board to define upper address limit on DMA
Instead of forcing boards to have DMA region below 4GiB, provide Kconfig option DMA_LIM_EXCL that a board can use to set the upper limit in MiB units on the address range reserved by DMA. By default, this value is 0x1000 i.e. 4GiB limit on the DMA upper address.
BUG=None BRANCH=None TEST=Compiles successfully for rush. Default value is seen as 0x1000.
Change-Id: Ie35d3844a0989486ae022f8922fdd4c9d7d57fb4 Signed-off-by: Patrick Georgi pgeorgi@chromium.org Original-Commit-Id: 6716cf312a103bc0440a558fc43c8c77869816e3 Original-Change-Id: I3ecbb4ec90995ab1568cb0924d5ce9467492697d Original-Signed-off-by: Furquan Shaikh furquan@google.com Original-Reviewed-on: https://chromium-review.googlesource.com/245250 Original-Tested-by: Furquan Shaikh furquan@chromium.org Original-Reviewed-by: Aaron Durbin adurbin@chromium.org Original-Commit-Queue: Furquan Shaikh furquan@chromium.org --- payloads/libpayload/arch/arm64/Config.in | 4 ++++ payloads/libpayload/arch/arm64/mmu.c | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/payloads/libpayload/arch/arm64/Config.in b/payloads/libpayload/arch/arm64/Config.in index 0f2596c..d2f8e56 100644 --- a/payloads/libpayload/arch/arm64/Config.in +++ b/payloads/libpayload/arch/arm64/Config.in @@ -33,4 +33,8 @@ config ARCH_SPECIFIC_OPTIONS # dummy def_bool y select LITTLE_ENDIAN
+config DMA_LIM_EXCL + hex "DMA address limit(exclusive) in MiB units" + default 0x1000 + endif diff --git a/payloads/libpayload/arch/arm64/mmu.c b/payloads/libpayload/arch/arm64/mmu.c index da2127d..adbee0f 100644 --- a/payloads/libpayload/arch/arm64/mmu.c +++ b/payloads/libpayload/arch/arm64/mmu.c @@ -609,7 +609,7 @@ static struct mmu_memrange *mmu_add_dma_range(struct mmu_ranges *mmu_ranges) /* DMA_DEFAULT_SIZE is multiple of GRANULE_SIZE */ assert((DMA_DEFAULT_SIZE % GRANULE_SIZE) == 0); prop.size = DMA_DEFAULT_SIZE; - prop.lim_excl = MIN_64_BIT_ADDR; + prop.lim_excl = (uint64_t)CONFIG_LP_DMA_LIM_EXCL * MiB; prop.align = GRANULE_SIZE; prop.is_valid_range = NULL; prop.src_type = TYPE_NORMAL_MEM;