LXR uboot/arch/avr32/include/asm/arch-at32ap700x/addrspace.h

   1/*
   2 * Copyright (C) 2006 Atmel Corporation
   3 *
   4 * See file CREDITS for list of people who contributed to this
   5 * project.
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License as
   9 * published by the Free Software Foundation; either version 2 of
  10 * the License, or (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20 * MA 02111-1307 USA
  21 */
  22#ifndef __ASM_AVR32_ADDRSPACE_H
  23#define __ASM_AVR32_ADDRSPACE_H
  24
  25#include <asm/types.h>
  26
  27/* Memory segments when segmentation is enabled */
  28#define P0SEG           0x00000000
  29#define P1SEG           0x80000000
  30#define P2SEG           0xa0000000
  31#define P3SEG           0xc0000000
  32#define P4SEG           0xe0000000
  33
  34/* Returns the privileged segment base of a given address */
  35#define PXSEG(a)        (((unsigned long)(a)) & 0xe0000000)
  36
  37/* Returns the physical address of a PnSEG (n=1,2) address */
  38#define PHYSADDR(a)     (((unsigned long)(a)) & 0x1fffffff)
  39
  40/*
  41 * Map an address to a certain privileged segment
  42 */
  43#define P1SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG))
  44#define P2SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG))
  45#define P3SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG))
  46#define P4SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG))
  47
  48/* virt_to_phys will only work when address is in P1 or P2 */
  49static inline unsigned long virt_to_phys(volatile void *address)
  50{
  51        return PHYSADDR(address);
  52}
  53
  54static inline void * phys_to_virt(unsigned long address)
  55{
  56        return (void *)P1SEGADDR(address);
  57}
  58
  59#define cached(addr) ((void *)P1SEGADDR(addr))
  60#define uncached(addr) ((void *)P2SEGADDR(addr))
  61
  62/*
  63 * Given a physical address and a length, return a virtual address
  64 * that can be used to access the memory range with the caching
  65 * properties specified by "flags".
  66 *
  67 * This implementation works for memory below 512MiB (flash, etc.) as
  68 * well as above 3.5GiB (internal peripherals.)
  69 */
  70#define MAP_NOCACHE     (0)
  71#define MAP_WRCOMBINE   (1 << 7)
  72#define MAP_WRBACK      (MAP_WRCOMBINE | (1 << 9))
  73#define MAP_WRTHROUGH   (MAP_WRBACK | (1 << 0))
  74
  75static inline void *
  76map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
  77{
  78        return (void *)paddr;
  79}
  80
  81#endif /* __ASM_AVR32_ADDRSPACE_H */
  82