android_kernel_xiaomi_sm8350/include/asm-arm/arch-ixp4xx/memory.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

62 lines
1.4 KiB
C

/*
* linux/include/asm-arm/arch-ixp4xx/memory.h
*
* Copyright (c) 2001-2004 MontaVista Software, Inc.
*/
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H
#include <asm/sizes.h>
/*
* Physical DRAM offset.
*/
#define PHYS_OFFSET (0x00000000UL)
#ifndef __ASSEMBLY__
/*
* Only first 64MB of memory can be accessed via PCI.
* We use GFP_DMA to allocate safe buffers to do map/unmap.
* This is really ugly and we need a better way of specifying
* DMA-capable regions of memory.
*/
static inline void __arch_adjust_zones(int node, unsigned long *zone_size,
unsigned long *zhole_size)
{
unsigned int sz = SZ_64M >> PAGE_SHIFT;
/*
* Only adjust if > 64M on current system
*/
if (node || (zone_size[0] <= sz))
return;
zone_size[1] = zone_size[0] - sz;
zone_size[0] = sz;
zhole_size[1] = zhole_size[0];
zhole_size[0] = 0;
}
#define arch_adjust_zones(node, size, holes) \
__arch_adjust_zones(node, size, holes)
#define ISA_DMA_THRESHOLD (SZ_64M - 1)
#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.
*
* These are dummies for now.
*/
#define __virt_to_bus(x) __virt_to_phys(x)
#define __bus_to_virt(x) __phys_to_virt(x)
#endif