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/* SPARC I/O definitions
*
* (C) Copyright 2007, 2015
* Daniel Hellstrom, Cobham Gaisler, 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()
/*
* Generic virtual read/write.
*/
#ifndef CONFIG_SYS_HAS_NO_CACHE
/* 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)
*/
#define __arch_getb(a) SPARC_NOCACHE_READ_BYTE((unsigned int)(a))
#define __arch_getw(a) SPARC_NOCACHE_READ_HWORD((unsigned int)(a))
#define __arch_getl(a) SPARC_NOCACHE_READ((unsigned int)(a))
#define __arch_getq(a) SPARC_NOCACHE_READ_DWORD((unsigned int)(a))
#else
#define __arch_getb(a) (*(volatile unsigned char *)(a))
#define __arch_getw(a) (*(volatile unsigned short *)(a))
#define __arch_getl(a) (*(volatile unsigned int *)(a))
#define __arch_getq(a) (*(volatile unsigned long long *)(a))
#endif /* CONFIG_SYS_HAS_NO_CACHE */
#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 __arch_putq(v, a) (*(volatile unsigned long long *)(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_writeq(v, a) __arch_putq(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)
#define writeb __raw_writeb
#define writew __raw_writew
#define writel __raw_writel
#define writeq __raw_writeq
#define readb __raw_readb
#define readw __raw_readw
#define readl __raw_readl
#define readq __raw_readq
/*
* 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
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