blob: 3524f91f354894d2002439482b4384296c83015c [file] [log] [blame]
* (C) Copyright 2011, Julius Baxter <>
* 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
* 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
* 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))