/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * 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 #ifdef __KERNEL__ #include <asm/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) (((unsigned long)(a)) & 0xe0000000) /* Returns the physical address of a PnSEG (n=1,2) address */ #define PHYSADDR(a) (((unsigned long)(a)) & 0x1fffffff) #ifdef CONFIG_29BIT /* * Map an address to a certain privileged segment */ #define P1SEGADDR(a) \ ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG)) #define P2SEGADDR(a) \ ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG)) #define P3SEGADDR(a) \ ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG)) #define P4SEGADDR(a) \ ((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG)) #endif /* 29BIT */ #endif /* P1SEG */ /* Check if an address can be reached in 29 bits */ #define IS_29BIT(a) (((unsigned long)(a)) < 0x20000000) #endif /* __KERNEL__ */ #endif /* __ASM_SH_ADDRSPACE_H */