[linux-2.6-block.git] / include / asm-frv / registers.h

/* registers.h: register frame declarations
 *
 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

/*
 * notes:
 *
 * (1) that the members of all these structures are carefully aligned to permit
 *     usage of STD/STDF instructions
 *
 * (2) if you change these structures, you must change the code in
 *     arch/frvnommu/kernel/{break.S,entry.S,switch_to.S,gdb-stub.c}
 *
 *
 * the kernel stack space block looks like this:
 *
 *	+0x2000	+----------------------
 *		| union {
 *		|	struct frv_frame0 {
 *		|		struct user_context {
 *		|			struct user_int_regs
 *		|			struct user_fpmedia_regs
 *		|		}
 *		|		struct frv_debug_regs
 *		|	}
 *		|	struct pt_regs [user exception]
 *		| }
 *		+---------------------- <-- __kernel_frame0_ptr (maybe GR28)
 *		|
 *		| kernel stack
 *		|
 *		|......................
 *		| struct pt_regs [kernel exception]
 *		|...................... <-- __kernel_frame0_ptr (maybe GR28)
 *		|
 *		| kernel stack
 *		|
 *		|...................... <-- stack pointer (GR1)
 *		|
 *		| unused stack space
 *		|
 *		+----------------------
 *		| struct thread_info
 *	+0x0000	+---------------------- <-- __current_thread_info (GR15);
 *
 * note that GR28 points to the current exception frame
 */

#ifndef _ASM_REGISTERS_H
#define _ASM_REGISTERS_H

#ifndef __ASSEMBLY__
#define __OFFSET(X,N)	((X)+(N)*4)
#define __OFFSETC(X,N)	xxxxxxxxxxxxxxxxxxxxxxxx
#else
#define __OFFSET(X,N)	((X)+(N)*4)
#define __OFFSETC(X,N)	((X)+(N))
#endif

/*****************************************************************************/
/*
 * Exception/Interrupt frame
 * - held on kernel stack
 * - 8-byte aligned on stack (old SP is saved in frame)
 * - GR0 is fixed 0, so we don't save it
 */
#ifndef __ASSEMBLY__

struct pt_regs {
	unsigned long		psr;		/* Processor Status Register */
	unsigned long		isr;		/* Integer Status Register */
	unsigned long		ccr;		/* Condition Code Register */
	unsigned long		cccr;		/* Condition Code for Conditional Insns Register */
	unsigned long		lr;		/* Link Register */
	unsigned long		lcr;		/* Loop Count Register */
	unsigned long		pc;		/* Program Counter Register */
	unsigned long		__status;	/* exception status */
	unsigned long		syscallno;	/* syscall number or -1 */
	unsigned long		orig_gr8;	/* original syscall arg #1 */
	unsigned long		gner0;
	unsigned long		gner1;
	unsigned long long	iacc0;
	unsigned long		tbr;		/* GR0 is fixed zero, so we use this for TBR */
	unsigned long		sp;		/* GR1: USP/KSP */
	unsigned long		fp;		/* GR2: FP */
	unsigned long		gr3;
	unsigned long		gr4;
	unsigned long		gr5;
	unsigned long		gr6;
	unsigned long		gr7;		/* syscall number */
	unsigned long		gr8;		/* 1st syscall param; syscall return */
	unsigned long		gr9;		/* 2nd syscall param */
	unsigned long		gr10;		/* 3rd syscall param */
	unsigned long		gr11;		/* 4th syscall param */
	unsigned long		gr12;		/* 5th syscall param */
	unsigned long		gr13;		/* 6th syscall param */
	unsigned long		gr14;
	unsigned long		gr15;
	unsigned long		gr16;		/* GP pointer */
	unsigned long		gr17;		/* small data */
	unsigned long		gr18;		/* PIC/PID */
	unsigned long		gr19;
	unsigned long		gr20;
	unsigned long		gr21;
	unsigned long		gr22;
	unsigned long		gr23;
	unsigned long		gr24;
	unsigned long		gr25;
	unsigned long		gr26;
	unsigned long		gr27;
	struct pt_regs		*next_frame;	/* GR28 - next exception frame */
	unsigned long		gr29;		/* GR29 - OS reserved */
	unsigned long		gr30;		/* GR30 - OS reserved */
	unsigned long		gr31;		/* GR31 - OS reserved */
} __attribute__((aligned(8)));

#endif

#define REG__STATUS_STEP	0x00000001	/* - reenable single stepping on return */
#define REG__STATUS_STEPPED	0x00000002	/* - single step caused exception */
#define REG__STATUS_BROKE	0x00000004	/* - BREAK insn caused exception */
#define REG__STATUS_SYSC_ENTRY	0x40000000	/* - T on syscall entry (ptrace.c only) */
#define REG__STATUS_SYSC_EXIT	0x80000000	/* - T on syscall exit (ptrace.c only) */

#define REG_GR(R)	__OFFSET(REG_GR0, (R))

#define REG_SP		REG_GR(1)
#define REG_FP		REG_GR(2)
#define REG_PREV_FRAME	REG_GR(28)	/* previous exception frame pointer (old gr28 value) */
#define REG_CURR_TASK	REG_GR(29)	/* current task */

/*****************************************************************************/
/*
 * debugging registers
 */
#ifndef __ASSEMBLY__

struct frv_debug_regs
{
	unsigned long		dcr;
	unsigned long		ibar[4] __attribute__((aligned(8)));
	unsigned long		dbar[4] __attribute__((aligned(8)));
	unsigned long		dbdr[4][4] __attribute__((aligned(8)));
	unsigned long		dbmr[4][4] __attribute__((aligned(8)));
} __attribute__((aligned(8)));

#endif

/*****************************************************************************/
/*
 * userspace registers
 */
#ifndef __ASSEMBLY__

struct user_int_regs
{
	/* integer registers
	 * - up to gr[31] mirror pt_regs
	 * - total size must be multiple of 8 bytes
	 */
	unsigned long		psr;		/* Processor Status Register */
	unsigned long		isr;		/* Integer Status Register */
	unsigned long		ccr;		/* Condition Code Register */
	unsigned long		cccr;		/* Condition Code for Conditional Insns Register */
	unsigned long		lr;		/* Link Register */
	unsigned long		lcr;		/* Loop Count Register */
	unsigned long		pc;		/* Program Counter Register */
	unsigned long		__status;	/* exception status */
	unsigned long		syscallno;	/* syscall number or -1 */
	unsigned long		orig_gr8;	/* original syscall arg #1 */
	unsigned long		gner[2];
	unsigned long long	iacc[1];

	union {
		unsigned long	tbr;
		unsigned long	gr[64];
	};
};

struct user_fpmedia_regs
{
	/* FP/Media registers */
	unsigned long	fr[64];
	unsigned long	fner[2];
	unsigned long	msr[2];
	unsigned long	acc[8];
	unsigned char	accg[8];
	unsigned long	fsr[1];
};

struct user_context
{
	struct user_int_regs		i;
	struct user_fpmedia_regs	f;

	/* we provide a context extension so that we can save the regs for CPUs that
	 * implement many more of Fujitsu's lavish register spec
	 */
	void *extension;
} __attribute__((aligned(8)));

struct frv_frame0 {
	union {
		struct pt_regs		regs;
		struct user_context	uc;
	};

	struct frv_debug_regs		debug;

} __attribute__((aligned(32)));

#endif

#define __INT_GR(R)		__OFFSET(__INT_GR0,		(R))

#define __FPMEDIA_FR(R)		__OFFSET(__FPMEDIA_FR0,		(R))
#define __FPMEDIA_FNER(R)	__OFFSET(__FPMEDIA_FNER0,	(R))
#define __FPMEDIA_MSR(R)	__OFFSET(__FPMEDIA_MSR0,	(R))
#define __FPMEDIA_ACC(R)	__OFFSET(__FPMEDIA_ACC0,	(R))
#define __FPMEDIA_ACCG(R)	__OFFSETC(__FPMEDIA_ACCG0,	(R))
#define __FPMEDIA_FSR(R)	__OFFSET(__FPMEDIA_FSR0,	(R))

#define __THREAD_GR(R)		__OFFSET(__THREAD_GR16,		(R) - 16)

#endif /* _ASM_REGISTERS_H */
Commit	Line	Data
1da177e4 LT	1	/* registers.h: register frame declarations
	2	*
	3	* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
	4	* Written by David Howells (dhowells@redhat.com)
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*/
	11
	12	/*
	13	* notes:
	14	*
	15	* (1) that the members of all these structures are carefully aligned to permit
	16	* usage of STD/STDF instructions
	17	*
	18	* (2) if you change these structures, you must change the code in
	19	* arch/frvnommu/kernel/{break.S,entry.S,switch_to.S,gdb-stub.c}
	20	*
	21	*
	22	* the kernel stack space block looks like this:
	23	*
	24	* +0x2000 +----------------------
	25	* \| union {
84e8cd6d DH	26	* \| struct frv_frame0 {
	27	* \| struct user_context {
	28	* \| struct user_int_regs
	29	* \| struct user_fpmedia_regs
	30	* \| }
	31	* \| struct frv_debug_regs
	32	* \| }
1da177e4 LT	33	* \| struct pt_regs [user exception]
	34	* \| }
	35	* +---------------------- <-- __kernel_frame0_ptr (maybe GR28)
	36	* \|
	37	* \| kernel stack
	38	* \|
	39	* \|......................
	40	* \| struct pt_regs [kernel exception]
	41	* \|...................... <-- __kernel_frame0_ptr (maybe GR28)
	42	* \|
	43	* \| kernel stack
	44	* \|
	45	* \|...................... <-- stack pointer (GR1)
	46	* \|
	47	* \| unused stack space
	48	* \|
	49	* +----------------------
	50	* \| struct thread_info
	51	* +0x0000 +---------------------- <-- __current_thread_info (GR15);
	52	*
	53	* note that GR28 points to the current exception frame
	54	*/
	55
	56	#ifndef _ASM_REGISTERS_H
	57	#define _ASM_REGISTERS_H
	58
	59	#ifndef __ASSEMBLY__
84e8cd6d	60	#define __OFFSET(X,N) ((X)+(N)*4)
1da177e4 LT	61	#define __OFFSETC(X,N) xxxxxxxxxxxxxxxxxxxxxxxx
1da177e4 LT	62	#else
84e8cd6d DH	63	#define __OFFSET(X,N) ((X)+(N)*4)
84e8cd6d DH	64	#define __OFFSETC(X,N) ((X)+(N))
1da177e4 LT	65	#endif
	66
	67	/*****************************************************************************/
	68	/*
	69	* Exception/Interrupt frame
	70	* - held on kernel stack
	71	* - 8-byte aligned on stack (old SP is saved in frame)
	72	* - GR0 is fixed 0, so we don't save it
	73	*/
	74	#ifndef __ASSEMBLY__
	75
	76	struct pt_regs {
	77	unsigned long psr; /* Processor Status Register */
	78	unsigned long isr; /* Integer Status Register */
	79	unsigned long ccr; /* Condition Code Register */
	80	unsigned long cccr; /* Condition Code for Conditional Insns Register */
	81	unsigned long lr; /* Link Register */
	82	unsigned long lcr; /* Loop Count Register */
	83	unsigned long pc; /* Program Counter Register */
	84	unsigned long __status; /* exception status */
	85	unsigned long syscallno; /* syscall number or -1 */
	86	unsigned long orig_gr8; /* original syscall arg #1 */
	87	unsigned long gner0;
	88	unsigned long gner1;
	89	unsigned long long iacc0;
	90	unsigned long tbr; /* GR0 is fixed zero, so we use this for TBR */
	91	unsigned long sp; /* GR1: USP/KSP */
	92	unsigned long fp; /* GR2: FP */
	93	unsigned long gr3;
	94	unsigned long gr4;
	95	unsigned long gr5;
	96	unsigned long gr6;
	97	unsigned long gr7; /* syscall number */
	98	unsigned long gr8; /* 1st syscall param; syscall return */
	99	unsigned long gr9; /* 2nd syscall param */
	100	unsigned long gr10; /* 3rd syscall param */
	101	unsigned long gr11; /* 4th syscall param */
	102	unsigned long gr12; /* 5th syscall param */
	103	unsigned long gr13; /* 6th syscall param */
	104	unsigned long gr14;
	105	unsigned long gr15;
	106	unsigned long gr16; /* GP pointer */
	107	unsigned long gr17; /* small data */
	108	unsigned long gr18; /* PIC/PID */
	109	unsigned long gr19;
	110	unsigned long gr20;
	111	unsigned long gr21;
	112	unsigned long gr22;
	113	unsigned long gr23;
	114	unsigned long gr24;
	115	unsigned long gr25;
	116	unsigned long gr26;
	117	unsigned long gr27;
	118	struct pt_regs next_frame; / GR28 - next exception frame */
	119	unsigned long gr29; /* GR29 - OS reserved */
	120	unsigned long gr30; /* GR30 - OS reserved */
	121	unsigned long gr31; /* GR31 - OS reserved */
	122	} __attribute__((aligned(8)));
	123
	124	#endif
	125
1da177e4 LT	126	#define REG__STATUS_STEP 0x00000001 /* - reenable single stepping on return */
	127	#define REG__STATUS_STEPPED 0x00000002 /* - single step caused exception */
	128	#define REG__STATUS_BROKE 0x00000004 /* - BREAK insn caused exception */
	129	#define REG__STATUS_SYSC_ENTRY 0x40000000 /* - T on syscall entry (ptrace.c only) */
	130	#define REG__STATUS_SYSC_EXIT 0x80000000 /* - T on syscall exit (ptrace.c only) */
	131
84e8cd6d	132	#define REG_GR(R) __OFFSET(REG_GR0, (R))
1da177e4 LT	133
	134	#define REG_SP REG_GR(1)
	135	#define REG_FP REG_GR(2)
	136	#define REG_PREV_FRAME REG_GR(28) /* previous exception frame pointer (old gr28 value) */
	137	#define REG_CURR_TASK REG_GR(29) /* current task */
	138
	139	/*****************************************************************************/
	140	/*
84e8cd6d	141	* debugging registers
1da177e4 LT	142	*/
	143	#ifndef __ASSEMBLY__
	144
84e8cd6d	145	struct frv_debug_regs
1da177e4	146	{
1da177e4	147	unsigned long dcr;
84e8cd6d DH	148	unsigned long ibar[4] __attribute__((aligned(8)));
	149	unsigned long dbar[4] __attribute__((aligned(8)));
	150	unsigned long dbdr[4][4] __attribute__((aligned(8)));
	151	unsigned long dbmr[4][4] __attribute__((aligned(8)));
1da177e4 LT	152	} __attribute__((aligned(8)));
	153
	154	#endif
	155
1da177e4 LT	156	/*****************************************************************************/
	157	/*
	158	* userspace registers
	159	*/
	160	#ifndef __ASSEMBLY__
	161
	162	struct user_int_regs
	163	{
	164	/* integer registers
	165	* - up to gr[31] mirror pt_regs
	166	* - total size must be multiple of 8 bytes
	167	*/
	168	unsigned long psr; /* Processor Status Register */
	169	unsigned long isr; /* Integer Status Register */
	170	unsigned long ccr; /* Condition Code Register */
	171	unsigned long cccr; /* Condition Code for Conditional Insns Register */
	172	unsigned long lr; /* Link Register */
	173	unsigned long lcr; /* Loop Count Register */
	174	unsigned long pc; /* Program Counter Register */
	175	unsigned long __status; /* exception status */
	176	unsigned long syscallno; /* syscall number or -1 */
	177	unsigned long orig_gr8; /* original syscall arg #1 */
	178	unsigned long gner[2];
	179	unsigned long long iacc[1];
	180
	181	union {
	182	unsigned long tbr;
	183	unsigned long gr[64];
	184	};
	185	};
	186
	187	struct user_fpmedia_regs
	188	{
	189	/* FP/Media registers */
	190	unsigned long fr[64];
	191	unsigned long fner[2];
	192	unsigned long msr[2];
	193	unsigned long acc[8];
	194	unsigned char accg[8];
	195	unsigned long fsr[1];
	196	};
	197
	198	struct user_context
	199	{
	200	struct user_int_regs i;
	201	struct user_fpmedia_regs f;
	202
	203	/* we provide a context extension so that we can save the regs for CPUs that
	204	* implement many more of Fujitsu's lavish register spec
	205	*/
	206	void *extension;
	207	} __attribute__((aligned(8)));
	208
84e8cd6d DH	209	struct frv_frame0 {
	210	union {
	211	struct pt_regs regs;
	212	struct user_context uc;
	213	};
	214
	215	struct frv_debug_regs debug;
	216
	217	} __attribute__((aligned(32)));
	218
1da177e4 LT	219	#endif
1da177e4 LT	220
84e8cd6d DH	221	#define __INT_GR(R) __OFFSET(__INT_GR0, (R))
	222
	223	#define __FPMEDIA_FR(R) __OFFSET(__FPMEDIA_FR0, (R))
	224	#define __FPMEDIA_FNER(R) __OFFSET(__FPMEDIA_FNER0, (R))
	225	#define __FPMEDIA_MSR(R) __OFFSET(__FPMEDIA_MSR0, (R))
	226	#define __FPMEDIA_ACC(R) __OFFSET(__FPMEDIA_ACC0, (R))
	227	#define __FPMEDIA_ACCG(R) __OFFSETC(__FPMEDIA_ACCG0, (R))
	228	#define __FPMEDIA_FSR(R) __OFFSET(__FPMEDIA_FSR0, (R))
	229
	230	#define __THREAD_GR(R) __OFFSET(__THREAD_GR16, (R) - 16)
1da177e4 LT	231
1da177e4 LT	232	#endif /* _ASM_REGISTERS_H */