mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-30 15:03:18 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/* SPARC I/O definitions
|
|
*
|
|
* (C) Copyright 2007
|
|
* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _SPARC_IO_H
|
|
#define _SPARC_IO_H
|
|
|
|
/* Nothing to sync, total store ordering (TSO)... */
|
|
#define sync()
|
|
|
|
/* Forces a cache miss on read/load.
|
|
* On some architectures we need to bypass the cache when reading
|
|
* I/O registers so that we are not reading the same status word
|
|
* over and over again resulting in a hang (until an IRQ if lucky)
|
|
*
|
|
*/
|
|
#ifndef CONFIG_SYS_HAS_NO_CACHE
|
|
#define READ_BYTE(var) SPARC_NOCACHE_READ_BYTE((unsigned int)(var))
|
|
#define READ_HWORD(var) SPARC_NOCACHE_READ_HWORD((unsigned int)(var))
|
|
#define READ_WORD(var) SPARC_NOCACHE_READ((unsigned int)(var))
|
|
#define READ_DWORD(var) SPARC_NOCACHE_READ_DWORD((unsigned int)(var))
|
|
#else
|
|
#define READ_BYTE(var) (var)
|
|
#define READ_HWORD(var) (var)
|
|
#define READ_WORD(var) (var)
|
|
#define READ_DWORD(var) (var)
|
|
#endif
|
|
|
|
/*
|
|
* Generic virtual read/write.
|
|
*/
|
|
#define __arch_getb(a) (READ_BYTE(a))
|
|
#define __arch_getw(a) (READ_HWORD(a))
|
|
#define __arch_getl(a) (READ_WORD(a))
|
|
#define __arch_getq(a) (READ_DWORD(a))
|
|
|
|
#define __arch_putb(v,a) (*(volatile unsigned char *)(a) = (v))
|
|
#define __arch_putw(v,a) (*(volatile unsigned short *)(a) = (v))
|
|
#define __arch_putl(v,a) (*(volatile unsigned int *)(a) = (v))
|
|
|
|
#define __raw_writeb(v,a) __arch_putb(v,a)
|
|
#define __raw_writew(v,a) __arch_putw(v,a)
|
|
#define __raw_writel(v,a) __arch_putl(v,a)
|
|
|
|
#define __raw_readb(a) __arch_getb(a)
|
|
#define __raw_readw(a) __arch_getw(a)
|
|
#define __raw_readl(a) __arch_getl(a)
|
|
#define __raw_readq(a) __arch_getq(a)
|
|
|
|
/*
|
|
* Given a physical address and a length, return a virtual address
|
|
* that can be used to access the memory range with the caching
|
|
* properties specified by "flags".
|
|
*/
|
|
|
|
#define MAP_NOCACHE (0)
|
|
#define MAP_WRCOMBINE (0)
|
|
#define MAP_WRBACK (0)
|
|
#define MAP_WRTHROUGH (0)
|
|
|
|
static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
|
|
unsigned long flags)
|
|
{
|
|
return (void *)paddr;
|
|
}
|
|
|
|
/*
|
|
* Take down a mapping set up by map_physmem().
|
|
*/
|
|
static inline void unmap_physmem(void *vaddr, unsigned long flags)
|
|
{
|
|
|
|
}
|
|
|
|
static inline phys_addr_t virt_to_phys(void * vaddr)
|
|
{
|
|
return (phys_addr_t)(vaddr);
|
|
}
|
|
|
|
#endif
|