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/*
* Copyright (C) 2006 Atmel Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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_AVR32_ADDRSPACE_H
#define __ASM_AVR32_ADDRSPACE_H
#include <asm/types.h>
/* Memory segments when segmentation is enabled */
#define P0SEG 0x00000000
#define P1SEG 0x80000000
#define P2SEG 0xa0000000
#define P3SEG 0xc0000000
#define P4SEG 0xe0000000
/* Returns the privileged segment base of a given address */
#define PXSEG(a) (((unsigned long)(a)) & 0xe0000000)
/* Returns the physical address of a PnSEG (n=1,2) address */
#define PHYSADDR(a) (((unsigned long)(a)) & 0x1fffffff)
/*
* Map an address to a certain privileged segment
*/
#define P1SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG))
#define P2SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG))
#define P3SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG))
#define P4SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG))
/* virt_to_phys will only work when address is in P1 or P2 */
static inline unsigned long virt_to_phys(volatile void *address)
{
return PHYSADDR(address);
}
static inline void * phys_to_virt(unsigned long address)
{
return (void *)P1SEGADDR(address);
}
#define cached(addr) ((void *)P1SEGADDR(addr))
#define uncached(addr) ((void *)P2SEGADDR(addr))
/*
* 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".
*
* This implementation works for memory below 512MiB (flash, etc.) as
* well as above 3.5GiB (internal peripherals.)
*/
#define MAP_NOCACHE (0)
#define MAP_WRCOMBINE (1 << 7)
#define MAP_WRBACK (MAP_WRCOMBINE | (1 << 9))
#define MAP_WRTHROUGH (MAP_WRBACK | (1 << 0))
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
if (flags == MAP_WRBACK)
return (void *)P1SEGADDR(paddr);
else
return (void *)P2SEGADDR(paddr);
}
#endif /* __ASM_AVR32_ADDRSPACE_H */
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