LXR uboot/arch/sandbox/include/asm/io.h

   1/*
   2 * Copyright (c) 2011 The Chromium OS Authors.
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#ifndef __SANDBOX_ASM_IO_H
   8#define __SANDBOX_ASM_IO_H
   9
  10/*
  11 * Given a physical address and a length, return a virtual address
  12 * that can be used to access the memory range with the caching
  13 * properties specified by "flags".
  14 */
  15#define MAP_NOCACHE     (0)
  16#define MAP_WRCOMBINE   (0)
  17#define MAP_WRBACK      (0)
  18#define MAP_WRTHROUGH   (0)
  19
  20void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags);
  21
  22/*
  23 * Take down a mapping set up by map_physmem().
  24 */
  25void unmap_physmem(const void *vaddr, unsigned long flags);
  26
  27/* For sandbox, we want addresses to point into our RAM buffer */
  28static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
  29{
  30        return map_physmem(paddr, len, MAP_WRBACK);
  31}
  32
  33/* Remove a previous mapping */
  34static inline void unmap_sysmem(const void *vaddr)
  35{
  36        unmap_physmem(vaddr, MAP_WRBACK);
  37}
  38
  39/* Map from a pointer to our RAM buffer */
  40phys_addr_t map_to_sysmem(const void *ptr);
  41
  42/* Define nops for sandbox I/O access */
  43#define readb(addr) ((void)addr, 0)
  44#define readw(addr) ((void)addr, 0)
  45#define readl(addr) ((void)addr, 0)
  46#define writeb(v, addr) ((void)addr)
  47#define writew(v, addr) ((void)addr)
  48#define writel(v, addr) ((void)addr)
  49
  50/* I/O access functions */
  51int inl(unsigned int addr);
  52int inw(unsigned int addr);
  53int inb(unsigned int addr);
  54
  55void outl(unsigned int value, unsigned int addr);
  56void outw(unsigned int value, unsigned int addr);
  57void outb(unsigned int value, unsigned int addr);
  58
  59static inline void _insw(volatile u16 *port, void *buf, int ns)
  60{
  61}
  62
  63static inline void _outsw(volatile u16 *port, const void *buf, int ns)
  64{
  65}
  66
  67#define insw(port, buf, ns)             _insw((u16 *)port, buf, ns)
  68#define outsw(port, buf, ns)            _outsw((u16 *)port, buf, ns)
  69
  70/* For systemace.c */
  71#define out16(addr, val)
  72#define in16(addr)              0
  73
  74#include <iotrace.h>
  75#include <asm/types.h>
  76
  77#endif
  78