[mirror_ubuntu-focal-kernel.git] / include / asm-arm / arch-lh7a40x / memory.h

/* 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	UL(0xc0000000)

/*
 * 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

/*
 * 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, 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
Commit	Line	Data
1da177e4 LT	1	/* include/asm-arm/arch-lh7a40x/memory.h
	2	*
	3	* Copyright (C) 2004 Coastal Environmental Systems
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License
	7	* version 2 as published by the Free Software Foundation.
	8	*
	9	*
	10	* Refer to <file:Documentation/arm/Sharp-LH/SDRAM> for more information.
	11	*
	12	*/
	13
	14	#ifndef __ASM_ARCH_MEMORY_H
	15	#define __ASM_ARCH_MEMORY_H
	16
	17	/*
	18	* Physical DRAM offset.
	19	*/
f09b9979	20	#define PHYS_OFFSET UL(0xc0000000)
1da177e4 LT	21
	22	/*
	23	* Virtual view <-> DMA view memory address translations
	24	* virt_to_bus: Used to translate the virtual address to an
	25	* address suitable to be passed to set_dma_addr
	26	* bus_to_virt: Used to convert an address for DMA operations
	27	* to an address that the kernel can use.
	28	*/
	29	#define __virt_to_bus(x) __virt_to_phys(x)
	30	#define __bus_to_virt(x) __phys_to_virt(x)
	31
	32	#ifdef CONFIG_DISCONTIGMEM
	33
1da177e4 LT	34	/*
	35	* Given a kernel address, find the home node of the underlying memory.
	36	*/
	37
	38	# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
	39	# define KVADDR_TO_NID(addr) \
	40	( ((((unsigned long) (addr) - PAGE_OFFSET) >> 24) & 1)\
	41	\| ((((unsigned long) (addr) - PAGE_OFFSET) >> 25) & ~1))
	42	# else /* 2 banks per node */
	43	# define KVADDR_TO_NID(addr) \
	44	(((unsigned long) (addr) - PAGE_OFFSET) >> 26)
	45	# endif
	46
	47	/*
	48	* Given a page frame number, convert it to a node id.
	49	*/
	50
	51	# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
	52	# define PFN_TO_NID(pfn) \
	53	(((((pfn) - PHYS_PFN_OFFSET) >> (24 - PAGE_SHIFT)) & 1)\
	54	\| ((((pfn) - PHYS_PFN_OFFSET) >> (25 - PAGE_SHIFT)) & ~1))
	55	# else /* 2 banks per node */
	56	# define PFN_TO_NID(pfn) \
	57	(((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
	58	#endif
	59
1da177e4 LT	60	/*
	61	* Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
	62	* and returns the index corresponding to the appropriate page in the
	63	* node's mem_map.
	64	*/
	65
	66	# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
	67	# define LOCAL_MAP_NR(addr) \
	68	(((unsigned long)(addr) & 0x003fffff) >> PAGE_SHIFT)
	69	# else /* 2 banks per node */
	70	# define LOCAL_MAP_NR(addr) \
	71	(((unsigned long)(addr) & 0x01ffffff) >> PAGE_SHIFT)
	72	# endif
	73
1da177e4 LT	74	#endif
	75
	76	#endif