forked from Minki/linux
2efa53b269
Presently __in_29bit_mode() is only defined for the PMB case, but it's also easily derived from the CONFIG_29BIT and CONFIG_32BIT && CONFIG_PMB=n cases. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*
|
|
* 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 <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)
|
|
|
|
#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))
|
|
#else
|
|
/*
|
|
* These will never work in 32-bit, don't even bother.
|
|
*/
|
|
#define P1SEGADDR(a) __futile_remapping_attempt
|
|
#define P2SEGADDR(a) __futile_remapping_attempt
|
|
#define P3SEGADDR(a) __futile_remapping_attempt
|
|
#define P4SEGADDR(a) __futile_remapping_attempt
|
|
#endif
|
|
#endif /* P1SEG */
|
|
|
|
/* Check if an address can be reached in 29 bits */
|
|
#define IS_29BIT(a) (((unsigned long)(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 /* __KERNEL__ */
|
|
#endif /* __ASM_SH_ADDRSPACE_H */
|