mipsregs.h

在 君正芯片上的mips

/*
 * 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) 1994, 1995, 1996, 1997, 2000, 2001 by Ralf Baechle
 * Copyright (C) 2000 Silicon Graphics, Inc.
 * Modified for further R[236]000 support by Paul M. Antoine, 1996.
 * Kevin D. Kissell, [e-mail] and Carsten Langgaard, [e-mail]
 * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
 * Copyright (C) 2003  Maciej W. Rozycki
 */
#ifndef _ASM_MIPSREGS_H
#define _ASM_MIPSREGS_H

#include <linux/config.h>
#include <linux/linkage.h>

/*
 * The following macros are especially useful for __asm__
 * inline assembler.
 */
#ifndef __STR
#define __STR(x) #x
#endif
#ifndef STR
#define STR(x) __STR(x)
#endif

/*
 *  Configure language
 */
#ifdef __ASSEMBLY__
#define _ULCAST_
#else
#define _ULCAST_ (unsigned long)
#endif

/*
 * Coprocessor 0 register names
 */
#define CP0_INDEX $0
#define CP0_RANDOM $1
#define CP0_ENTRYLO0 $2
#define CP0_ENTRYLO1 $3
#define CP0_CONF $3
#define CP0_CONTEXT $4
#define CP0_PAGEMASK $5
#define CP0_WIRED $6
#define CP0_INFO $7
#define CP0_BADVADDR $8
#define CP0_COUNT $9
#define CP0_ENTRYHI $10
#define CP0_COMPARE $11
#define CP0_STATUS $12
#define CP0_CAUSE $13
#define CP0_EPC $14
#define CP0_PRID $15
#define CP0_CONFIG $16
#define CP0_LLADDR $17
#define CP0_WATCHLO $18
#define CP0_WATCHHI $19
#define CP0_XCONTEXT $20
#define CP0_FRAMEMASK $21
#define CP0_DIAGNOSTIC $22
#define CP0_DEBUG $23
#define CP0_DEPC $24
#define CP0_PERFORMANCE $25
#define CP0_ECC $26
#define CP0_CACHEERR $27
#define CP0_TAGLO $28
#define CP0_TAGHI $29
#define CP0_ERROREPC $30
#define CP0_DESAVE $31

/*
 * R4640/R4650 cp0 register names.  These registers are listed
 * here only for completeness; without MMU these CPUs are not useable
 * by Linux.  A future ELKS port might take make Linux run on them
 * though ...
 */
#define CP0_IBASE $0
#define CP0_IBOUND $1
#define CP0_DBASE $2
#define CP0_DBOUND $3
#define CP0_CALG $17
#define CP0_IWATCH $18
#define CP0_DWATCH $19

/*
 * Coprocessor 0 Set 1 register names
 */
#define CP0_S1_DERRADDR0  $26
#define CP0_S1_DERRADDR1  $27
#define CP0_S1_INTCONTROL $20

/*
 *  TX39 Series
 */
#define CP0_TX39_CACHE	$7

/*
 * Coprocessor 1 (FPU) register names
 */
#define CP1_REVISION   $0
#define CP1_STATUS     $31

/*
 * FPU Status Register Values
 */
/*
 * Status Register Values
 */

#define FPU_CSR_FLUSH   0x01000000      /* flush denormalised results to 0 */
#define FPU_CSR_COND    0x00800000      /* $fcc0 */
#define FPU_CSR_COND0   0x00800000      /* $fcc0 */
#define FPU_CSR_COND1   0x02000000      /* $fcc1 */
#define FPU_CSR_COND2   0x04000000      /* $fcc2 */
#define FPU_CSR_COND3   0x08000000      /* $fcc3 */
#define FPU_CSR_COND4   0x10000000      /* $fcc4 */
#define FPU_CSR_COND5   0x20000000      /* $fcc5 */
#define FPU_CSR_COND6   0x40000000      /* $fcc6 */
#define FPU_CSR_COND7   0x80000000      /* $fcc7 */

/*
 * X the exception cause indicator
 * E the exception enable
 * S the sticky/flag bit
*/
#define FPU_CSR_ALL_X   0x0003f000
#define FPU_CSR_UNI_X   0x00020000
#define FPU_CSR_INV_X   0x00010000
#define FPU_CSR_DIV_X   0x00008000
#define FPU_CSR_OVF_X   0x00004000
#define FPU_CSR_UDF_X   0x00002000
#define FPU_CSR_INE_X   0x00001000

#define FPU_CSR_ALL_E   0x00000f80
#define FPU_CSR_INV_E   0x00000800
#define FPU_CSR_DIV_E   0x00000400
#define FPU_CSR_OVF_E   0x00000200
#define FPU_CSR_UDF_E   0x00000100
#define FPU_CSR_INE_E   0x00000080

#define FPU_CSR_ALL_S   0x0000007c
#define FPU_CSR_INV_S   0x00000040
#define FPU_CSR_DIV_S   0x00000020
#define FPU_CSR_OVF_S   0x00000010
#define FPU_CSR_UDF_S   0x00000008
#define FPU_CSR_INE_S   0x00000004

/* rounding mode */
#define FPU_CSR_RN      0x0     /* nearest */
#define FPU_CSR_RZ      0x1     /* towards zero */
#define FPU_CSR_RU      0x2     /* towards +Infinity */
#define FPU_CSR_RD      0x3     /* towards -Infinity */


/*
 * Values for PageMask register
 */
#ifdef CONFIG_CPU_VR41XX

/* Why doesn't stupidity hurt ... */

#define PM_1K		0x00000000
#define PM_4K		0x00001800
#define PM_16K		0x00007800
#define PM_64K		0x0001f800
#define PM_256K		0x0007f800

#else

#define PM_4K		0x00000000
#define PM_16K		0x00006000
#define PM_64K		0x0001e000
#define PM_256K		0x0007e000
#define PM_1M		0x001fe000
#define PM_4M		0x007fe000
#define PM_16M		0x01ffe000
#define PM_64M		0x07ffe000
#define PM_256M		0x1fffe000

#endif

/*
 * Values used for computation of new tlb entries
 */
#define PL_4K		12
#define PL_16K		14
#define PL_64K		16
#define PL_256K		18
#define PL_1M		20
#define PL_4M		22
#define PL_16M		24
#define PL_64M		26
#define PL_256M		28

/*
 * R4x00 interrupt enable / cause bits
 */
#define IE_SW0          (_ULCAST_(1) <<  8)
#define IE_SW1          (_ULCAST_(1) <<  9)
#define IE_IRQ0         (_ULCAST_(1) << 10)
#define IE_IRQ1         (_ULCAST_(1) << 11)
#define IE_IRQ2         (_ULCAST_(1) << 12)
#define IE_IRQ3         (_ULCAST_(1) << 13)
#define IE_IRQ4         (_ULCAST_(1) << 14)
#define IE_IRQ5         (_ULCAST_(1) << 15)

/*
 * R4x00 interrupt cause bits
 */
#define C_SW0           (_ULCAST_(1) <<  8)
#define C_SW1           (_ULCAST_(1) <<  9)
#define C_IRQ0          (_ULCAST_(1) << 10)
#define C_IRQ1          (_ULCAST_(1) << 11)
#define C_IRQ2          (_ULCAST_(1) << 12)
#define C_IRQ3          (_ULCAST_(1) << 13)
#define C_IRQ4          (_ULCAST_(1) << 14)
#define C_IRQ5          (_ULCAST_(1) << 15)

/*
 * Bitfields in the R4xx0 cp0 status register
 */
#define ST0_IE			0x00000001
#define ST0_EXL			0x00000002
#define ST0_ERL			0x00000004
#define ST0_KSU			0x00000018
#  define KSU_USER		0x00000010
#  define KSU_SUPERVISOR	0x00000008
#  define KSU_KERNEL		0x00000000
#define ST0_UX			0x00000020
#define ST0_SX			0x00000040
#define ST0_KX 			0x00000080
#define ST0_DE			0x00010000
#define ST0_CE			0x00020000

/*
 * Bitfields in the R[23]000 cp0 status register.
 */
#define ST0_IEC                 0x00000001
#define ST0_KUC			0x00000002
#define ST0_IEP			0x00000004
#define ST0_KUP			0x00000008
#define ST0_IEO			0x00000010
#define ST0_KUO			0x00000020
/* bits 6 & 7 are reserved on R[23]000 */
#define ST0_ISC			0x00010000
#define ST0_SWC			0x00020000
#define ST0_CM			0x00080000

/*
 * Bits specific to the R4640/R4650
 */
#define ST0_UM			(_ULCAST_(1) <<  4)
#define ST0_IL			(_ULCAST_(1) << 23)
#define ST0_DL			(_ULCAST_(1) << 24)

/*
 * Bitfields in the TX39 family CP0 Configuration Register 3
 */
#define TX39_CONF_ICS_SHIFT	19
#define TX39_CONF_ICS_MASK	0x00380000
#define TX39_CONF_ICS_1KB 	0x00000000
#define TX39_CONF_ICS_2KB 	0x00080000
#define TX39_CONF_ICS_4KB 	0x00100000
#define TX39_CONF_ICS_8KB 	0x00180000
#define TX39_CONF_ICS_16KB 	0x00200000

#define TX39_CONF_DCS_SHIFT	16
#define TX39_CONF_DCS_MASK	0x00070000
#define TX39_CONF_DCS_1KB 	0x00000000
#define TX39_CONF_DCS_2KB 	0x00010000
#define TX39_CONF_DCS_4KB 	0x00020000
#define TX39_CONF_DCS_8KB 	0x00030000
#define TX39_CONF_DCS_16KB 	0x00040000

#define TX39_CONF_CWFON 	0x00004000
#define TX39_CONF_WBON  	0x00002000
#define TX39_CONF_RF_SHIFT	10
#define TX39_CONF_RF_MASK	0x00000c00
#define TX39_CONF_DOZE		0x00000200
#define TX39_CONF_HALT		0x00000100
#define TX39_CONF_LOCK		0x00000080
#define TX39_CONF_ICE		0x00000020
#define TX39_CONF_DCE		0x00000010
#define TX39_CONF_IRSIZE_SHIFT	2
#define TX39_CONF_IRSIZE_MASK	0x0000000c
#define TX39_CONF_DRSIZE_SHIFT	0
#define TX39_CONF_DRSIZE_MASK	0x00000003

/*
 * Status register bits available in all MIPS CPUs.
 */
#define ST0_IM			0x0000ff00
#define  STATUSB_IP0		8
#define  STATUSF_IP0		(_ULCAST_(1) <<  8)
#define  STATUSB_IP1		9
#define  STATUSF_IP1		(_ULCAST_(1) <<  9)
#define  STATUSB_IP2		10
#define  STATUSF_IP2		(_ULCAST_(1) << 10)
#define  STATUSB_IP3		11
#define  STATUSF_IP3		(_ULCAST_(1) << 11)
#define  STATUSB_IP4		12
#define  STATUSF_IP4		(_ULCAST_(1) << 12)
#define  STATUSB_IP5		13
#define  STATUSF_IP5		(_ULCAST_(1) << 13)
#define  STATUSB_IP6		14
#define  STATUSF_IP6		(_ULCAST_(1) << 14)
#define  STATUSB_IP7		15
#define  STATUSF_IP7		(_ULCAST_(1) << 15)
#define  STATUSB_IP8		0
#define  STATUSF_IP8		(_ULCAST_(1) <<  0)
#define  STATUSB_IP9		1
#define  STATUSF_IP9		(_ULCAST_(1) <<  1)
#define  STATUSB_IP10		2
#define  STATUSF_IP10		(_ULCAST_(1) <<  2)
#define  STATUSB_IP11		3
#define  STATUSF_IP11		(_ULCAST_(1) <<  3)
#define  STATUSB_IP12		4
#define  STATUSF_IP12		(_ULCAST_(1) <<  4)
#define  STATUSB_IP13		5
#define  STATUSF_IP13		(_ULCAST_(1) <<  5)
#define  STATUSB_IP14		6
#define  STATUSF_IP14		(_ULCAST_(1) <<  6)
#define  STATUSB_IP15		7
#define  STATUSF_IP15		(_ULCAST_(1) <<  7)