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

   1/*
   2 * Copyright (C) 2006 Atmel Corporation
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6#ifndef __ASM_AVR32_ADDRSPACE_H
   7#define __ASM_AVR32_ADDRSPACE_H
   8
   9#include <asm/types.h>
  10
  11/* Memory segments when segmentation is enabled */
  12#define P0SEG           0x00000000
  13#define P1SEG           0x80000000
  14#define P2SEG           0xa0000000
  15#define P3SEG           0xc0000000
  16#define P4SEG           0xe0000000
  17
  18/* Returns the privileged segment base of a given address */
  19#define PXSEG(a)        (((unsigned long)(a)) & 0xe0000000)
  20
  21/* Returns the physical address of a PnSEG (n=1,2) address */
  22#define PHYSADDR(a)     (((unsigned long)(a)) & 0x1fffffff)
  23
  24/*
  25 * Map an address to a certain privileged segment
  26 */
  27#define P1SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG))
  28#define P2SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG))
  29#define P3SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG))
  30#define P4SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG))
  31
  32/* virt_to_phys will only work when address is in P1 or P2 */
  33static inline unsigned long virt_to_phys(volatile void *address)
  34{
  35        return PHYSADDR(address);
  36}
  37
  38static inline void * phys_to_virt(unsigned long address)
  39{
  40        return (void *)P1SEGADDR(address);
  41}
  42
  43#define cached(addr) ((void *)P1SEGADDR(addr))
  44#define uncached(addr) ((void *)P2SEGADDR(addr))
  45
  46/*
  47 * Given a physical address and a length, return a virtual address
  48 * that can be used to access the memory range with the caching
  49 * properties specified by "flags".
  50 *
  51 * This implementation works for memory below 512MiB (flash, etc.) as
  52 * well as above 3.5GiB (internal peripherals.)
  53 */
  54#define MAP_NOCACHE     (0)
  55#define MAP_WRCOMBINE   (1 << 7)
  56#define MAP_WRBACK      (MAP_WRCOMBINE | (1 << 9))
  57#define MAP_WRTHROUGH   (MAP_WRBACK | (1 << 0))
  58
  59static inline void *
  60map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
  61{
  62        return (void *)paddr;
  63}
  64
  65#endif /* __ASM_AVR32_ADDRSPACE_H */
  66