/* 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 ) ] 0 x00000000 < - - - - - - User space
[ P1 ( fixed ) cached ] 0 x80000000 < - - - - - - Kernel space
[ P2 ( fixed ) non - cachable ] 0 xA0000000 < - - - - - - Physical access
[ P3 ( virtual ) cached ] 0 xC0000000 < - - - - - - vmalloced area
[ P4 control ] 0 xE0000000
*/
/* Returns the privileged segment base of a given address */
#define PXSEG(a) (((unsigned long )(a)) & 0 xe0000000)
#ifdef CONFIG_29BIT
/*
* Map an address to a certain privileged segment
*/
#define P1SEGADDR(a) \
((__typeof__(a))(((unsigned long )(a) & 0 x1fffffff) | P1SEG))
#define P2SEGADDR(a) \
((__typeof__(a))(((unsigned long )(a) & 0 x1fffffff) | P2SEG))
#define P3SEGADDR(a) \
((__typeof__(a))(((unsigned long )(a) & 0 x1fffffff) | P3SEG))
#define P4SEGADDR(a) \
((__typeof__(a))(((unsigned long )(a) & 0 x1fffffff) | 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) (((unsigned long )(a)) < 0 x20000000)
#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 + 0 x04000000)
#else
#define P3_ADDR_MAX P4SEG
#endif
#endif /* __ASM_SH_ADDRSPACE_H */
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