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/* $OpenBSD: locore.h,v 1.5 1999/02/09 06:36:26 smurph Exp $ */
/*
* Mach Operating System
* Copyright (c) 1993-1991 Carnegie Mellon University
* Copyright (c) 1991 OMRON Corporation
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/* "locore.h" Omron Corporation
* This file created by Omron Corporation, 1990.
* NOTE: Any assembly file that includes this one must define ASSEMBLER first
*/
#ifndef __MACHINE_LOCORE_H__
#define __MACHINE_LOCORE_H__
/*
**********************************************************************
SYNTACTICAL AND SEMANTIC DOO-DADS
**********************************************************************
*/
/*
* NEWLINE is defined in 'assmy.s' in the object area to be a double
* backslash, which 'as' interprets the same as '\n'
*/
/*
* If this has been included in an assembly file, make sure
* LOCORE is defined. Always make sure KERNEL is defined.
*/
#if defined(ASSEMBLER) && !defined(LOCORE)
# define LOCORE
#endif
#if !defined(KERNEL)
# define KERNEL
#endif
/* Define EH_DEBUG to be non-zero to compile-in various debugging things */
#ifndef EH_DEBUG
#define EH_DEBUG 0
#endif EH_DEBUG
/* this gives the offsets into various structures of various elements, etc */
#include "assym.s"
/*
* LABEL(name)
* Defines the name to be a label visible to the world.
*
* _LABEL(name)
* Defines one visible only to the file, unless debugging
* is enabled, in which case it's visible to the world (and
* hence to debuggers, and such).
*/
#define LABEL(name) name: global name NEWLINE
#if EH_DEBUG
# define _LABEL(name) name: global name NEWLINE
#else
# define _LABEL(name) name: NEWLINE
#endif
/*
* Useful in some situations.
* NOTE: If ARG1 or ARG2 are r2 or r3, strange things may happen. Watch out!
*/
#define CALL(NAME, ARG1, ARG2) \
subu r31, r31, 32 NEWLINE \
or r2, r0, ARG1 NEWLINE \
bsr.n NAME NEWLINE \
or r3, r0, ARG2 NEWLINE \
addu r31, r31, 32
/*
**********************************************************************
SYMBOLIC CONSTANTS AND VALUES and other important things
**********************************************************************
*/
/*
* SR1 - CPU FLAGS REGISTER
*
* SR1 contains flags about the current CPU status.
*
* The lowest FLAG_CPU_FIELD_WIDTH bits hold the cpu number (currently 0-3).
*
*
* The bit FLAG_IGNORE_DATA_EXCEPTION indicates that any data exceptions
* should be ignored (well, at least treated in a special way).
* The bit FLAG_INTERRUPT_EXCEPTION indicates that the current exception
* is the interrupt exception. Such information can be gotten
* in other ways, but having it in the flags makes it easy for the
* exception handler to check quickly.
* The bit FLAG_ENABLING_FPU indicates that the exception handler is
* in the process of enabling the FPU (so that an exception can
* be serviced). This is needed because enabling the FPU can
* cause other exceptions to happen, and the whole system is
* in a rather precarious state and so special cautions must
* be taken.
*/
#define FLAG_CPU_FIELD_WIDTH 4 /* must be <= 12 */
#define FLAG_IGNORE_DATA_EXCEPTION 5 /* bit number 5 */
#define FLAG_INTERRUPT_EXCEPTION 6 /* bit number 6 */
#define FLAG_ENABLING_FPU 7 /* bit number 7 */
/* REGister OFFset into the E.F. (exception frame) */
#define REG_OFF(reg_num) ((reg_num) * 4) /* (num * sizeof(register int)) */
#define GENREG_OFF(num) (REG_OFF(EF_R0 + (num))) /* GENeral REGister OFFset */
#define GENERAL_BREATHING_ROOM /* arbitrarily */ 200
#define KERNEL_STACK_BREATHING_ROOM \
(GENERAL_BREATHING_ROOM + SIZEOF_STRUCT_PCB + SIZEOF_STRUCT_UTHREAD)
/*
* Some registers used during the setting up of the new exception frame.
* Don't choose r1, r30, or r31 for any of them.
*
* Also, if any are 'r2' or 'r3', be careful using with CALL above!
*/
#define FLAGS r2
#define TMP r3
#define TMP2 r10
#define TMP3 r11
#define SAVE_TMP2 st r10, r31, GENREG_OFF(10)
#define SAVE_TMP3 st r11, r31, GENREG_OFF(11)
#define RESTORE_TMP2 ld r10, r31, GENREG_OFF(10)
#define RESTORE_TMP3 ld r11, r31, GENREG_OFF(11)
/* alternate CPU control register names */
#define PID cr0
#define PSR cr1
#define EPSR cr2
#define SSBR cr3
#define SXIP cr4
#define SNIP cr5
#define SFIP cr6
#define VBR cr7
#define DMT0 cr8
#define DMD0 cr9
#define DMA0 cr10
#define DMT1 cr11
#define DMD1 cr12
#define DMA1 cr13
#define DMT2 cr14
#define DMD2 cr15
#define DMA2 cr16
#define SR0 cr17
#define SR1 cr18
#define SR2 cr19
#define SR3 cr20
#define FPECR fcr0
#define FPHS1 fcr1
#define FPLS1 fcr2
#define FPHS2 fcr3
#define FPLS2 fcr4
#define FPPT fcr5
#define FPRH fcr6
#define FPRL fcr7
#define FPIT fcr8
#define FPSR fcr62
#define FPCR fcr63
/*
* Info about the PSR
*/
#define PSR_SHADOW_FREEZE_BIT 0
#define PSR_INTERRUPT_DISABLE_BIT 1
#define PSR_FPU_DISABLE_BIT 3
#define PSR_BIG_ENDIAN_MODE 30
#define PSR_SUPERVISOR_MODE_BIT 31
/*
* Status bits for an SXIP/SNIP/SFIP address.
*/
#define RTE_VALID_BIT 1
#define RTE_ERROR_BIT 0
/*
* Info about DMT0/DMT1/DMT2
*/
#define DMT_VALID_BIT 0
#define DMT_WRITE_BIT 1
#define DMT_LOCK_BIT 12
#define DMT_DOUBLE_BIT 13
#define DMT_DAS_BIT 14
#define DMT_DREG_OFFSET 7
#define DMT_DREG_WIDTH 5
/*
* Bits for eh_debug.
*/
#define DEBUG_INTERRUPT_BIT 0
#define DEBUG_DATA_BIT 1
#define DEBUG_INSTRUCTION_BIT 2
#define DEBUG_MISALIGN_BIT 3
#define DEBUG_UNIMP_BIT 4
#define DEBUG_DIVIDE_BIT 5
#define DEBUG_OF_BIT 6
#define DEBUG_FPp_BIT 7
#define DEBUG_FPi_BIT 8
#define DEBUG_SYSCALL_BIT 9
#define DEBUG_MACHSYSCALL_BIT 10
#define DEBUG_UNIMPLEMENTED_BIT 11
#define DEBUG_PRIVILEGE_BIT 12
#define DEBUG_BOUNDS_BIT 13
#define DEBUG_OVERFLOW_BIT 14
#define DEBUG_ERROR_BIT 15
#define DEBUG_SIGSYS_BIT 16
#define DEBUG_SIGTRAP_BIT 17
#define DEBUG_BREAK_BIT 18
#define DEBUG_TRACE_BIT 19
#define DEBUG_KDB_BIT 20
#define DEBUG_JKDB_BIT 21
#define DEBUG_BUGCALL_BIT 22
#define DEBUG_UNKNOWN_BIT 31
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
#define YES 1
#define NO 0
#define SCSI_INTS 0x10
#define SCSI_SSTS 0x18
#define SCSI_DREG 0x28
/* change software timer for 8mm device support -- 90/08/21 CEC OKUI */
#define SCSI_WAIT 0x5000000
/*
* At various times, there is the need to clear the pipeline (i.e.
* synchronize). A "tcnd ne0, r0, foo" will do that (because a trap
* instruction always synchronizes, and this particular instruction
* will never actually take the trap).
*/
#define FLUSH_PIPELINE tcnd ne0, r0, 0
/*
* NOP -- NO-Operation.
*
* A do-nothing one clock doesn't-touch-the-scoreboard type of instruction,
* in case one's needed (sometimes useful for debugging).
*/
#define NOP or r0, r0, r0
/*
* These things for vector_init.c and locore.c
*/
#if defined(ASSEMBLER)
# define PREDEFINED_BY_ROM 0xffffffff
# define END_OF_VECTOR_LIST 0xfffffffe
#else
# define PREDEFINED_BY_ROM 0xffffffffU
# define END_OF_VECTOR_LIST 0xfffffffeU
#endif
/*
* Define ERROR__XXX_USR if the xxx.usr bug (mask C82N) is present.
* This implements the workaround.
*/
#define ERRATA__XXX_USR 1
#define USERMODE(x) (!(x & (1 << PSR_SUPERVISOR_MODE_BIT)))
#endif /* __MACHINE_LOCORE_H__ */
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