1 /* SPDX-License-Identifier: GPL-2.0 2 * 3 * Copyright (C) 1999 by Kaz Kojima 4 * 5 * Defitions for the address spaces of the SH CPUs. 6 */ 7 #ifndef __ASM_SH_ADDRSPACE_H 8 #define __ASM_SH_ADDRSPACE_H 9 10 #ifdef __KERNEL__ 11 12 #include <cpu/addrspace.h> 13 14 /* If this CPU supports segmentation, hook up the helpers */ 15 #ifdef P1SEG 16 17 /* 18 [ P0/U0 (virtual) ] 0x00000000 <------ User space 19 [ P1 (fixed) cached ] 0x80000000 <------ Kernel space 20 [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access 21 [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area 22 [ P4 control ] 0xE0000000 23 */ 24 25 /* Returns the privileged segment base of a given address */ 26 #define PXSEG(a) (((unsigned long)(a)) & 0xe0000000) 27 28 #ifdef CONFIG_29BIT 29 /* 30 * Map an address to a certain privileged segment 31 */ 32 #define P1SEGADDR(a) \ 33 ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG)) 34 #define P2SEGADDR(a) \ 35 ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG)) 36 #define P3SEGADDR(a) \ 37 ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG)) 38 #define P4SEGADDR(a) \ 39 ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG)) 40 #else 41 /* 42 * These will never work in 32-bit, don't even bother. 43 */ 44 #define P1SEGADDR(a) ({ (void)(a); BUG(); NULL; }) 45 #define P2SEGADDR(a) ({ (void)(a); BUG(); NULL; }) 46 #define P3SEGADDR(a) ({ (void)(a); BUG(); NULL; }) 47 #define P4SEGADDR(a) ({ (void)(a); BUG(); NULL; }) 48 #endif 49 #endif /* P1SEG */ 50 51 /* Check if an address can be reached in 29 bits */ 52 #define IS_29BIT(a) (((unsigned long)(a)) < 0x20000000) 53 54 #ifdef CONFIG_SH_STORE_QUEUES 55 /* 56 * This is a special case for the SH-4 store queues, as pages for this 57 * space still need to be faulted in before it's possible to flush the 58 * store queue cache for writeout to the remapped region. 59 */ 60 #define P3_ADDR_MAX (P4SEG_STORE_QUE + 0x04000000) 61 #else 62 #define P3_ADDR_MAX P4SEG 63 #endif 64 65 #endif /* __KERNEL__ */ 66 #endif /* __ASM_SH_ADDRSPACE_H */ 67