git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (C) 1999 by Kaz Kojima | |
| 7 | * | |
| 8 | * Defitions for the address spaces of the SH CPUs. | |
| 9 | */ | |
| 10 | #ifndef __ASM_SH_ADDRSPACE_H | |
| 11 | #define __ASM_SH_ADDRSPACE_H | |
| 5a668651 | 12 | |
| 1da177e4 LT |
13 | #ifdef __KERNEL__ |
| 14 | ||
| f15cbe6f | 15 | #include <cpu/addrspace.h> |
| 1da177e4 | 16 | |
| 5a668651 PM |
17 | /* If this CPU supports segmentation, hook up the helpers */ |
| 18 | #ifdef P1SEG | |
| 1da177e4 | 19 | |
| 6deb6f91 PM |
20 | /* |
| 21 | [ P0/U0 (virtual) ] 0x00000000 <------ User space | |
| 22 | [ P1 (fixed) cached ] 0x80000000 <------ Kernel space | |
| 23 | [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access | |
| 24 | [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area | |
| 25 | [ P4 control ] 0xE0000000 | |
| 26 | */ | |
| 27 | ||
| 1da177e4 LT |
28 | /* Returns the privileged segment base of a given address */ |
| 29 | #define PXSEG(a) (((unsigned long)(a)) & 0xe0000000) | |
| 30 | ||
| a0ab3668 | 31 | #ifdef CONFIG_29BIT |
| 1da177e4 LT |
32 | /* |
| 33 | * Map an address to a certain privileged segment | |
| 34 | */ | |
| 5a668651 PM |
35 | #define P1SEGADDR(a) \ |
| 36 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG)) | |
| 37 | #define P2SEGADDR(a) \ | |
| 38 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG)) | |
| 39 | #define P3SEGADDR(a) \ | |
| 40 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG)) | |
| 41 | #define P4SEGADDR(a) \ | |
| 42 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG)) | |
| 206582c3 PM |
43 | #else |
| 44 | /* | |
| 45 | * These will never work in 32-bit, don't even bother. | |
| 46 | */ | |
| e2fcf74f PM |
47 | #define P1SEGADDR(a) ({ (void)(a); BUG(); NULL; }) |
| 48 | #define P2SEGADDR(a) ({ (void)(a); BUG(); NULL; }) | |
| 49 | #define P3SEGADDR(a) ({ (void)(a); BUG(); NULL; }) | |
| 50 | #define P4SEGADDR(a) ({ (void)(a); BUG(); NULL; }) | |
| 206582c3 | 51 | #endif |
| 5a668651 | 52 | #endif /* P1SEG */ |
| 1da177e4 | 53 | |
| d02b08f6 SM |
54 | /* Check if an address can be reached in 29 bits */ |
| 55 | #define IS_29BIT(a) (((unsigned long)(a)) < 0x20000000) | |
| 56 | ||
| 716777db MD |
57 | #ifdef CONFIG_SH_STORE_QUEUES |
| 58 | /* | |
| 59 | * This is a special case for the SH-4 store queues, as pages for this | |
| 60 | * space still need to be faulted in before it's possible to flush the | |
| 61 | * store queue cache for writeout to the remapped region. | |
| 62 | */ | |
| 63 | #define P3_ADDR_MAX (P4SEG_STORE_QUE + 0x04000000) | |
| 64 | #else | |
| 65 | #define P3_ADDR_MAX P4SEG | |
| 66 | #endif | |
| 67 | ||
| 1da177e4 LT |
68 | #endif /* __KERNEL__ */ |
| 69 | #endif /* __ASM_SH_ADDRSPACE_H */ |