diff options
Diffstat (limited to 'arch/arm/plat-mxs/include/mach/memory.h')
-rw-r--r-- | arch/arm/plat-mxs/include/mach/memory.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/plat-mxs/include/mach/memory.h b/arch/arm/plat-mxs/include/mach/memory.h new file mode 100644 index 000000000000..79c86db78d49 --- /dev/null +++ b/arch/arm/plat-mxs/include/mach/memory.h @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef __ASM_ARCH_MEMORY_H +#define __ASM_ARCH_MEMORY_H + +#include <asm/page.h> +#include <asm/sizes.h> + +/* + * Physical DRAM offset. + */ +#define PHYS_OFFSET UL(0x40000000) + +#ifndef __ASSEMBLY__ + +#ifdef CONFIG_DMA_ZONE_SIZE +#define MXS_DMA_ZONE_SIZE ((CONFIG_DMA_ZONE_SIZE * SZ_1M) >> PAGE_SHIFT) +#else +#define MXS_DMA_ZONE_SIZE ((12 * SZ_1M) >> PAGE_SHIFT) +#endif + +static inline void __arch_adjust_zones(int node, unsigned long *zone_size, + unsigned long *zhole_size) +{ + if (node != 0) + return; + /* Create separate zone to reserve memory for DMA */ + zone_size[1] = zone_size[0] - MXS_DMA_ZONE_SIZE; + zone_size[0] = MXS_DMA_ZONE_SIZE; + zhole_size[1] = zhole_size[0]; + zhole_size[0] = 0; +} + +#define arch_adjust_zones(node, size, holes) \ + __arch_adjust_zones(node, size, holes) + +#endif +/* + * Virtual view <-> DMA view memory address translations + * virt_to_bus: Used to translate the virtual address to an + * address suitable to be passed to set_dma_addr + * bus_to_virt: Used to convert an address for DMA operations + * to an address that the kernel can use. + */ +#define __virt_to_bus(x) __virt_to_phys(x) +#define __bus_to_virt(x) __phys_to_virt(x) + +#define ISA_DMA_THRESHOLD (0x0003ffffULL) + +#define CONSISTENT_DMA_SIZE SZ_32M + +#endif |