2 * Copyright (C) 2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 #ifndef __ASM_AVR32_ADDRSPACE_H
23 #define __ASM_AVR32_ADDRSPACE_H
25 #include <asm/types.h>
27 /* Memory segments when segmentation is enabled */
28 #define P0SEG 0x00000000
29 #define P1SEG 0x80000000
30 #define P2SEG 0xa0000000
31 #define P3SEG 0xc0000000
32 #define P4SEG 0xe0000000
34 /* Returns the privileged segment base of a given address */
35 #define PXSEG(a) (((unsigned long)(a)) & 0xe0000000)
37 /* Returns the physical address of a PnSEG (n=1,2) address */
38 #define PHYSADDR(a) (((unsigned long)(a)) & 0x1fffffff)
41 * Map an address to a certain privileged segment
43 #define P1SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG))
44 #define P2SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG))
45 #define P3SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG))
46 #define P4SEGADDR(a) ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG))
48 /* virt_to_phys will only work when address is in P1 or P2 */
49 static inline unsigned long virt_to_phys(volatile void *address)
51 return PHYSADDR(address);
54 static inline void * phys_to_virt(unsigned long address)
56 return (void *)P1SEGADDR(address);
59 #define cached(addr) ((void *)P1SEGADDR(addr))
60 #define uncached(addr) ((void *)P2SEGADDR(addr))
63 * Given a physical address and a length, return a virtual address
64 * that can be used to access the memory range with the caching
65 * properties specified by "flags".
67 * This implementation works for memory below 512MiB (flash, etc.) as
68 * well as above 3.5GiB (internal peripherals.)
70 #define MAP_NOCACHE (0)
71 #define MAP_WRCOMBINE (1 << 7)
72 #define MAP_WRBACK (MAP_WRCOMBINE | (1 << 9))
73 #define MAP_WRTHROUGH (MAP_WRBACK | (1 << 0))
76 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
81 #endif /* __ASM_AVR32_ADDRSPACE_H */