Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Paul Mundt | 5a66865 | 2007-11-08 18:42:46 +0900 | [diff] [blame] | 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #ifdef __KERNEL__ |
| 14 | |
Paul Mundt | f15cbe6 | 2008-07-29 08:09:44 +0900 | [diff] [blame] | 15 | #include <cpu/addrspace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
Paul Mundt | 5a66865 | 2007-11-08 18:42:46 +0900 | [diff] [blame] | 17 | /* If this CPU supports segmentation, hook up the helpers */ |
| 18 | #ifdef P1SEG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Paul Mundt | 6deb6f9 | 2007-11-21 15:34:02 +0900 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | /* Returns the privileged segment base of a given address */ |
| 29 | #define PXSEG(a) (((unsigned long)(a)) & 0xe0000000) |
| 30 | |
| 31 | /* Returns the physical address of a PnSEG (n=1,2) address */ |
| 32 | #define PHYSADDR(a) (((unsigned long)(a)) & 0x1fffffff) |
| 33 | |
Yoshihiro Shimoda | 2f47f44 | 2009-03-10 15:49:54 +0900 | [diff] [blame] | 34 | #if defined(CONFIG_29BIT) || defined(CONFIG_PMB_FIXED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | /* |
| 36 | * Map an address to a certain privileged segment |
| 37 | */ |
Paul Mundt | 5a66865 | 2007-11-08 18:42:46 +0900 | [diff] [blame] | 38 | #define P1SEGADDR(a) \ |
| 39 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG)) |
| 40 | #define P2SEGADDR(a) \ |
| 41 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG)) |
| 42 | #define P3SEGADDR(a) \ |
| 43 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG)) |
| 44 | #define P4SEGADDR(a) \ |
| 45 | ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG)) |
Yoshihiro Shimoda | 2f47f44 | 2009-03-10 15:49:54 +0900 | [diff] [blame] | 46 | #endif /* 29BIT || PMB_FIXED */ |
Paul Mundt | 5a66865 | 2007-11-08 18:42:46 +0900 | [diff] [blame] | 47 | #endif /* P1SEG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Stuart Menefy | d02b08f | 2007-11-30 17:52:53 +0900 | [diff] [blame] | 49 | /* Check if an address can be reached in 29 bits */ |
| 50 | #define IS_29BIT(a) (((unsigned long)(a)) < 0x20000000) |
| 51 | |
Magnus Damm | 716777d | 2008-11-25 21:57:29 +0900 | [diff] [blame] | 52 | #ifdef CONFIG_SH_STORE_QUEUES |
| 53 | /* |
| 54 | * This is a special case for the SH-4 store queues, as pages for this |
| 55 | * space still need to be faulted in before it's possible to flush the |
| 56 | * store queue cache for writeout to the remapped region. |
| 57 | */ |
| 58 | #define P3_ADDR_MAX (P4SEG_STORE_QUE + 0x04000000) |
| 59 | #else |
| 60 | #define P3_ADDR_MAX P4SEG |
| 61 | #endif |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #endif /* __KERNEL__ */ |
| 64 | #endif /* __ASM_SH_ADDRSPACE_H */ |