xref: /openbmc/u-boot/arch/xtensa/include/asm/regs.h (revision c978b52410016b0ab5a213f235596340af8d45f7)

/*
 * Copyright (c) 2006 Tensilica, Inc.  All Rights Reserved.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef _XTENSA_REGS_H
#define _XTENSA_REGS_H

/*  Special registers  */

#define IBREAKA		128
#define DBREAKA		144
#define DBREAKC		160

/*  Special names for read-only and write-only interrupt registers  */

#define INTREAD		226
#define INTSET		226
#define INTCLEAR	227

/*  EXCCAUSE register fields  */

#define EXCCAUSE_EXCCAUSE_SHIFT	0
#define EXCCAUSE_EXCCAUSE_MASK	0x3F

#define EXCCAUSE_ILLEGAL_INSTRUCTION		0
#define EXCCAUSE_SYSTEM_CALL			1
#define EXCCAUSE_INSTRUCTION_FETCH_ERROR	2
#define EXCCAUSE_LOAD_STORE_ERROR		3
#define EXCCAUSE_LEVEL1_INTERRUPT		4
#define EXCCAUSE_ALLOCA				5
#define EXCCAUSE_INTEGER_DIVIDE_BY_ZERO		6
#define EXCCAUSE_SPECULATION			7
#define EXCCAUSE_PRIVILEGED			8
#define EXCCAUSE_UNALIGNED			9
#define EXCCAUSE_INSTR_DATA_ERROR		12
#define EXCCAUSE_LOAD_STORE_DATA_ERROR		13
#define EXCCAUSE_INSTR_ADDR_ERROR		14
#define EXCCAUSE_LOAD_STORE_ADDR_ERROR		15
#define EXCCAUSE_ITLB_MISS			16
#define EXCCAUSE_ITLB_MULTIHIT			17
#define EXCCAUSE_ITLB_PRIVILEGE			18
#define EXCCAUSE_ITLB_SIZE_RESTRICTION		19
#define EXCCAUSE_FETCH_CACHE_ATTRIBUTE		20
#define EXCCAUSE_DTLB_MISS			24
#define EXCCAUSE_DTLB_MULTIHIT			25
#define EXCCAUSE_DTLB_PRIVILEGE			26
#define EXCCAUSE_DTLB_SIZE_RESTRICTION		27
#define EXCCAUSE_LOAD_CACHE_ATTRIBUTE		28
#define EXCCAUSE_STORE_CACHE_ATTRIBUTE		29
#define EXCCAUSE_COPROCESSOR0_DISABLED		32
#define EXCCAUSE_COPROCESSOR1_DISABLED		33
#define EXCCAUSE_COPROCESSOR2_DISABLED		34
#define EXCCAUSE_COPROCESSOR3_DISABLED		35
#define EXCCAUSE_COPROCESSOR4_DISABLED		36
#define EXCCAUSE_COPROCESSOR5_DISABLED		37
#define EXCCAUSE_COPROCESSOR6_DISABLED		38
#define EXCCAUSE_COPROCESSOR7_DISABLED		39
#define EXCCAUSE_LAST				63

/*  PS register fields  */

#define PS_WOE_BIT		18
#define PS_CALLINC_SHIFT	16
#define PS_CALLINC_MASK		0x00030000
#define PS_OWB_SHIFT		8
#define PS_OWB_MASK		0x00000F00
#define PS_RING_SHIFT		6
#define PS_RING_MASK		0x000000C0
#define PS_UM_BIT		5
#define PS_EXCM_BIT		4
#define PS_INTLEVEL_SHIFT	0
#define PS_INTLEVEL_MASK	0x0000000F

/*  DBREAKCn register fields  */

#define DBREAKC_MASK_BIT		0
#define DBREAKC_MASK_MASK		0x0000003F
#define DBREAKC_LOAD_BIT		30
#define DBREAKC_LOAD_MASK		0x40000000
#define DBREAKC_STOR_BIT		31
#define DBREAKC_STOR_MASK		0x80000000

/*  DEBUGCAUSE register fields  */

#define DEBUGCAUSE_DEBUGINT_BIT		5	/* External debug interrupt */
#define DEBUGCAUSE_BREAKN_BIT		4	/* BREAK.N instruction */
#define DEBUGCAUSE_BREAK_BIT		3	/* BREAK instruction */
#define DEBUGCAUSE_DBREAK_BIT		2	/* DBREAK match */
#define DEBUGCAUSE_IBREAK_BIT		1	/* IBREAK match */
#define DEBUGCAUSE_ICOUNT_BIT		0	/* ICOUNT would incr. to zero */

#endif /* _XTENSA_SPECREG_H */