You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.9 KiB
68 lines
1.9 KiB
/*
|
|
* linux/include/asm-arm/arch-sa1100/memory.h
|
|
*
|
|
* Copyright (C) 1999-2000 Nicolas Pitre <nico@cam.org>
|
|
*/
|
|
|
|
#ifndef __ASM_ARCH_MEMORY_H
|
|
#define __ASM_ARCH_MEMORY_H
|
|
|
|
#include <asm/sizes.h>
|
|
|
|
/*
|
|
* Physical DRAM offset is 0xc0000000 on the SA1100
|
|
*/
|
|
#define PHYS_OFFSET UL(0xc0000000)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#ifdef CONFIG_SA1111
|
|
void sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes);
|
|
|
|
#define arch_adjust_zones(node, size, holes) \
|
|
sa1111_adjust_zones(node, size, holes)
|
|
|
|
#define ISA_DMA_THRESHOLD (PHYS_OFFSET + SZ_1M - 1)
|
|
|
|
#endif
|
|
#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.
|
|
*
|
|
* On the SA1100, bus addresses are equivalent to physical addresses.
|
|
*/
|
|
#define __virt_to_bus(x) __virt_to_phys(x)
|
|
#define __bus_to_virt(x) __phys_to_virt(x)
|
|
|
|
/*
|
|
* Because of the wide memory address space between physical RAM banks on the
|
|
* SA1100, it's much convenient to use Linux's NUMA support to implement our
|
|
* memory map representation. Assuming all memory nodes have equal access
|
|
* characteristics, we then have generic discontiguous memory support.
|
|
*
|
|
* Of course, all this isn't mandatory for SA1100 implementations with only
|
|
* one used memory bank. For those, simply undefine CONFIG_DISCONTIGMEM.
|
|
*
|
|
* The nodes are matched with the physical memory bank addresses which are
|
|
* incidentally the same as virtual addresses.
|
|
*
|
|
* node 0: 0xc0000000 - 0xc7ffffff
|
|
* node 1: 0xc8000000 - 0xcfffffff
|
|
* node 2: 0xd0000000 - 0xd7ffffff
|
|
* node 3: 0xd8000000 - 0xdfffffff
|
|
*/
|
|
#define NODE_MEM_SIZE_BITS 27
|
|
|
|
/*
|
|
* Cache flushing area - SA1100 zero bank
|
|
*/
|
|
#define FLUSH_BASE_PHYS 0xe0000000
|
|
#define FLUSH_BASE 0xf5000000
|
|
#define FLUSH_BASE_MINICACHE 0xf5100000
|
|
|
|
#endif
|
|
|