From cfd570990f863de90a86da73ef7b7d84e5190647 Mon Sep 17 00:00:00 2001 From: David Daney Date: Fri, 1 Oct 2010 13:27:28 -0700 Subject: [PATCH] MIPS: Allow MAX_DMA32_PFN to be overridden. DMA mapping may reduce the usable physical address range usable for 32-bit DMA. Signed-off-by: David Daney Patchwork: http://patchwork.linux-mips.org/patch/1633/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/dma.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/mips/include/asm/dma.h b/arch/mips/include/asm/dma.h index 1353c81065d1..2d47da62d5a7 100644 --- a/arch/mips/include/asm/dma.h +++ b/arch/mips/include/asm/dma.h @@ -91,7 +91,10 @@ #define MAX_DMA_ADDRESS (PAGE_OFFSET + 0x01000000) #endif #define MAX_DMA_PFN PFN_DOWN(virt_to_phys((void *)MAX_DMA_ADDRESS)) + +#ifndef MAX_DMA32_PFN #define MAX_DMA32_PFN (1UL << (32 - PAGE_SHIFT)) +#endif /* 8237 DMA controllers */ #define IO_DMA1_BASE 0x00 /* 8 bit slave DMA, channels 0..3 */ -- 2.20.1