mirror of https://gitee.com/openkylin/linux.git
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
|
/* include/asm-arm/arch-lh7a40x/memory.h
|
||
|
|
*
|
||
|
|
* Copyright (C) 2004 Coastal Environmental Systems
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* version 2 as published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Refer to <file:Documentation/arm/Sharp-LH/SDRAM> for more information.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_ARCH_MEMORY_H
|
||
|
|
#define __ASM_ARCH_MEMORY_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Physical DRAM offset.
|
||
|
|
*/
|
||
|
|
#define PHYS_OFFSET (0xc0000000UL)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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)
|
||
|
|
|
||
|
|
#ifdef CONFIG_DISCONTIGMEM
|
||
|
|
|
||
|
|
#define NODES_SHIFT 4 /* Up to 16 nodes */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a kernel address, find the home node of the underlying memory.
|
||
|
|
*/
|
||
|
|
|
||
|
|
# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
|
||
|
|
# define KVADDR_TO_NID(addr) \
|
||
|
|
( ((((unsigned long) (addr) - PAGE_OFFSET) >> 24) & 1)\
|
||
|
|
| ((((unsigned long) (addr) - PAGE_OFFSET) >> 25) & ~1))
|
||
|
|
# else /* 2 banks per node */
|
||
|
|
# define KVADDR_TO_NID(addr) \
|
||
|
|
(((unsigned long) (addr) - PAGE_OFFSET) >> 26)
|
||
|
|
# endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a page frame number, convert it to a node id.
|
||
|
|
*/
|
||
|
|
|
||
|
|
# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
|
||
|
|
# define PFN_TO_NID(pfn) \
|
||
|
|
(((((pfn) - PHYS_PFN_OFFSET) >> (24 - PAGE_SHIFT)) & 1)\
|
||
|
|
| ((((pfn) - PHYS_PFN_OFFSET) >> (25 - PAGE_SHIFT)) & ~1))
|
||
|
|
# else /* 2 banks per node */
|
||
|
|
# define PFN_TO_NID(pfn) \
|
||
|
|
(((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
|
||
|
|
* and return the mem_map of that node.
|
||
|
|
*/
|
||
|
|
# define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a page frame number, find the owning node of the memory
|
||
|
|
* and return the mem_map of that node.
|
||
|
|
*/
|
||
|
|
# define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
|
||
|
|
* and returns the index corresponding to the appropriate page in the
|
||
|
|
* node's mem_map.
|
||
|
|
*/
|
||
|
|
|
||
|
|
# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
|
||
|
|
# define LOCAL_MAP_NR(addr) \
|
||
|
|
(((unsigned long)(addr) & 0x003fffff) >> PAGE_SHIFT)
|
||
|
|
# else /* 2 banks per node */
|
||
|
|
# define LOCAL_MAP_NR(addr) \
|
||
|
|
(((unsigned long)(addr) & 0x01ffffff) >> PAGE_SHIFT)
|
||
|
|
# endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|