diff options
| author | Huacai Chen <chenhc@lemote.com> | 2018-08-23 13:33:10 +0800 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-08-28 09:47:14 -0700 |
| commit | 33f2ac5451a62f4e441454522b0588790144a717 (patch) | |
| tree | 1f04758c19f6909e1031703cbbc88704518eb815 /arch/mips/loongson64/lemote-2f | |
| parent | 5b394b2ddf0347bef56e50c69a58773c94343ff3 (diff) | |
MIPS: Loongon64: DMA functions cleanup
Split the common dma.c which shared by Loongson-2E and Loongson-2F,
since the code in 'common' directory is assumed be shared by all 64bit
Loongson platforms (but Loongson-3 doesn't use it now). By the way,
Loongson-2E and Loongson-2F have already dropped 32bit kernel support,
so CONFIG_64BIT isn't needed.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20302/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: Huacai Chen <chenhuacai@gmail.com>
Diffstat (limited to 'arch/mips/loongson64/lemote-2f')
| -rw-r--r-- | arch/mips/loongson64/lemote-2f/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/loongson64/lemote-2f/dma.c | 14 |
2 files changed, 15 insertions, 1 deletions
diff --git a/arch/mips/loongson64/lemote-2f/Makefile b/arch/mips/loongson64/lemote-2f/Makefile index 08b8abcbfef5..b5792c334cd5 100644 --- a/arch/mips/loongson64/lemote-2f/Makefile +++ b/arch/mips/loongson64/lemote-2f/Makefile @@ -2,7 +2,7 @@ # Makefile for lemote loongson2f family machines # -obj-y += clock.o machtype.o irq.o reset.o ec_kb3310b.o +obj-y += clock.o machtype.o irq.o reset.o dma.o ec_kb3310b.o # # Suspend Support diff --git a/arch/mips/loongson64/lemote-2f/dma.c b/arch/mips/loongson64/lemote-2f/dma.c new file mode 100644 index 000000000000..abf0e39d7e46 --- /dev/null +++ b/arch/mips/loongson64/lemote-2f/dma.c @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/dma-direct.h> + +dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + return paddr | 0x80000000; +} + +phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr) +{ + if (dma_addr > 0x8fffffff) + return dma_addr; + return dma_addr & 0x0fffffff; +} |