/* SPDX-License-Identifier: GPL-2.0 * * Copyright (C) 1999 by Kaz Kojima * * Defitions for the address spaces of the SH CPUs.
*/ #ifndef __ASM_SH_ADDRSPACE_H #define __ASM_SH_ADDRSPACE_H
#include <cpu/addrspace.h>
/* If this CPU supports segmentation, hook up the helpers */ #ifdef P1SEG
/* [ P0/U0 (virtual) ] 0x00000000 <------ User space [ P1 (fixed) cached ] 0x80000000 <------ Kernel space [ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access [ P3 (virtual) cached] 0xC0000000 <------ vmalloced area [ P4 control ] 0xE0000000
*/
/* Returns the privileged segment base of a given address */ #define PXSEG(a) (((unsignedlong)(a)) & 0xe0000000)
#ifdef CONFIG_29BIT /* * Map an address to a certain privileged segment
*/ #define P1SEGADDR(a) \
((__typeof__(a))(((unsignedlong)(a) & 0x1fffffff) | P1SEG)) #define P2SEGADDR(a) \
((__typeof__(a))(((unsignedlong)(a) & 0x1fffffff) | P2SEG)) #define P3SEGADDR(a) \
((__typeof__(a))(((unsignedlong)(a) & 0x1fffffff) | P3SEG)) #define P4SEGADDR(a) \
((__typeof__(a))(((unsignedlong)(a) & 0x1fffffff) | P4SEG)) #else /* * These will never work in 32-bit, don't even bother.
*/ #define P1SEGADDR(a) ({ (void)(a); BUG(); NULL; }) #define P2SEGADDR(a) ({ (void)(a); BUG(); NULL; }) #define P3SEGADDR(a) ({ (void)(a); BUG(); NULL; }) #define P4SEGADDR(a) ({ (void)(a); BUG(); NULL; }) #endif #endif/* P1SEG */
/* Check if an address can be reached in 29 bits */ #define IS_29BIT(a) (((unsignedlong)(a)) < 0x20000000)
#ifdef CONFIG_SH_STORE_QUEUES /* * This is a special case for the SH-4 store queues, as pages for this * space still need to be faulted in before it's possible to flush the * store queue cache for writeout to the remapped region.
*/ #define P3_ADDR_MAX (P4SEG_STORE_QUE + 0x04000000) #else #define P3_ADDR_MAX P4SEG #endif
#endif/* __ASM_SH_ADDRSPACE_H */
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