2 * Copyright (c) 2011 The Chromium OS Authors.
4 * SPDX-License-Identifier: GPL-2.0+
7 #ifndef __SANDBOX_ASM_IO_H
8 #define __SANDBOX_ASM_IO_H
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".
15 #define MAP_NOCACHE (0)
16 #define MAP_WRCOMBINE (0)
17 #define MAP_WRBACK (0)
18 #define MAP_WRTHROUGH (0)
20 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags);
23 * Take down a mapping set up by map_physmem().
25 void unmap_physmem(const void *vaddr, unsigned long flags);
27 /* For sandbox, we want addresses to point into our RAM buffer */
28 static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
30 return map_physmem(paddr, len, MAP_WRBACK);
33 /* Remove a previous mapping */
34 static inline void unmap_sysmem(const void *vaddr)
36 unmap_physmem(vaddr, MAP_WRBACK);
39 /* Map from a pointer to our RAM buffer */
40 phys_addr_t map_to_sysmem(const void *ptr);
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)
50 /* I/O access functions */
51 int inl(unsigned int addr);
52 int inw(unsigned int addr);
53 int inb(unsigned int addr);
55 void outl(unsigned int value, unsigned int addr);
56 void outw(unsigned int value, unsigned int addr);
57 void outb(unsigned int value, unsigned int addr);
59 static inline void _insw(volatile u16 *port, void *buf, int ns)
63 static inline void _outsw(volatile u16 *port, const void *buf, int ns)
67 #define insw(port, buf, ns) _insw((u16 *)port, buf, ns)
68 #define outsw(port, buf, ns) _outsw((u16 *)port, buf, ns)
71 #define out16(addr, val)
75 #include <asm/types.h>