riscv: Add DMA 64-bit address support

dma_addr_t holds any valid DMA address. If the DMA API only uses 32/64-bit
addresses, dma_addr_t need only be 32/64 bits wide.

Signed-off-by: Padmarao Begari <padmarao.begari@microchip.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Rick Chen <rick@andestech.com>

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 30b0540..55eaee2 100644 (file)
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -152,6 +152,10 @@ config 32BIT
 config 64BIT
        bool
 
+config DMA_ADDR_T_64BIT
+       bool
+       default y if 64BIT
+
 config SIFIVE_CLINT
        bool
        depends on RISCV_MMODE || SPL_RISCV_MMODE

diff --git a/arch/riscv/include/asm/types.h b/arch/riscv/include/asm/types.h
index 403cf9a..b800b2d 100644 (file)
--- a/arch/riscv/include/asm/types.h
+++ b/arch/riscv/include/asm/types.h
@@ -29,7 +29,11 @@ typedef unsigned short umode_t;
 
 #include <stddef.h>
 
+#ifdef CONFIG_DMA_ADDR_T_64BIT
+typedef u64 dma_addr_t;
+#else
 typedef u32 dma_addr_t;
+#endif
 
 typedef unsigned long phys_addr_t;
 typedef unsigned long phys_size_t;