mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 16:07:30 +00:00
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/*
|
|
* (C) Copyright 2011, Julius Baxter <julius@opencores.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __ASM_OPENRISC_IO_H
|
|
#define __ASM_OPENRISC_IO_H
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
|
|
}
|
|
|
|
/*
|
|
* Change virtual addresses to physical addresses
|
|
*/
|
|
static inline phys_addr_t virt_to_phys(void *vaddr)
|
|
{
|
|
return (phys_addr_t)(vaddr);
|
|
}
|
|
|
|
|
|
/*
|
|
* readX/writeX() are used to access memory mapped devices. On some
|
|
* architectures the memory mapped IO stuff needs to be accessed
|
|
* differently. On the openrisc architecture, we just read/write the
|
|
* memory location directly.
|
|
*/
|
|
#define readb(addr) (*(volatile unsigned char *) (addr))
|
|
#define readw(addr) (*(volatile unsigned short *) (addr))
|
|
#define readl(addr) (*(volatile unsigned int *) (addr))
|
|
#define __raw_readb readb
|
|
#define __raw_readw readw
|
|
#define __raw_readl readl
|
|
|
|
#define writeb(b, addr) ((*(volatile unsigned char *) (addr)) = (b))
|
|
#define writew(b, addr) ((*(volatile unsigned short *) (addr)) = (b))
|
|
#define writel(b, addr) ((*(volatile unsigned int *) (addr)) = (b))
|
|
#define __raw_writeb writeb
|
|
#define __raw_writew writew
|
|
#define __raw_writel writel
|
|
|
|
#define memset_io(a, b, c) memset((void *)(a), (b), (c))
|
|
#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
|
|
#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
|
|
|
|
/*
|
|
* Again, OpenRISC does not require mem IO specific function.
|
|
*/
|
|
|
|
|
|
#define IO_BASE 0x0
|
|
#define IO_SPACE_LIMIT 0xffffffff
|
|
|
|
#define inb(port) readb((port + IO_BASE))
|
|
#define outb(value, port) writeb((value), (port + IO_BASE))
|
|
#define inb_p(port) inb((port))
|
|
#define outb_p(value, port) outb((value), (port))
|
|
|
|
/*
|
|
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
|
|
* access
|
|
*/
|
|
#define xlate_dev_mem_ptr(p) __va(p)
|
|
|
|
/*
|
|
* Convert a virtual cached pointer to an uncached pointer
|
|
*/
|
|
#define xlate_dev_kmem_ptr(p) p
|
|
|
|
#define ioread8(addr) readb(addr)
|
|
#define ioread16(addr) readw(addr)
|
|
#define ioread32(addr) readl(addr)
|
|
|
|
#define iowrite8(v, addr) writeb((v), (addr))
|
|
#define iowrite16(v, addr) writew((v), (addr))
|
|
#define iowrite32(v, addr) writel((v), (addr))
|
|
|
|
#endif
|