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/* $OpenBSD: asm.h,v 1.11 2001/07/04 08:09:23 niklas Exp $ */
/*
* Mach Operating System
* Copyright (c) 1993-1992 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.
*/
#ifndef __MACHINE_M88K_ASM_H__
#define __MACHINE_M88K_ASM_H__
#ifdef __STDC__
# define FUNC(NAME) _##NAME
#else
# define FUNC(NAME) _/**/NAME
#endif
/* Define EH_DEBUG to be non-zero to compile-in various debugging things */
#ifndef EH_DEBUG
#define EH_DEBUG 1
#endif EH_DEBUG
#define ENTRY(NAME) \
.align 8; .globl FUNC(NAME); FUNC(NAME):
#define LABEL(name) name: .globl name ;
/*
* _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).
*/
#if EH_DEBUG
# define _LABEL(name) name: .globl name ;
#else
# define _LABEL(name) name: ;
#endif
#define RTE NOP ; rte
#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 SRX cr16
#define SR0 cr17
#define SR1 cr18
#define SR2 cr19
#define SR3 cr20
/* MVME197 only */
#define SRX cr16
#define EXIP cr4
#define ENIP cr5
#define ICMD cr25
#define ICTL cr26
#define ISAR cr27
#define ISAP cr28
#define IUAP cr29
#define IIR cr30
#define IBP cr31
#define IPPU cr32
#define IPPL cr33
#define ISR cr34
#define ILAR cr35
#define IPAR cr36
#define DCMD cr40
#define DCTL cr41
#define DSAR cr42
#define DSAP cr43
#define DUAP cr44
#define DIR cr45
#define DBP cr46
#define DPPU cr47
#define DPPL cr48
#define DSR cr49
#define DLAR cr50
#define DPAR cr51
/* end MVME197 only */
#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
/*
* At various times, there is the need to clear the pipeline (i.e.
* synchronize). A "tb1 0, r0, foo" will do that (because a trap
* instruction always synchronizes, and this particular instruction
* will never actually take the trap).
*/
#if 0
#define FLUSH_PIPELINE tcnd ne0, r0, 0
#else
#define FLUSH_PIPELINE tb1 0, r0, 0
#endif
#define NOP or r0, r0, r0
/*
* 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 ; \
or r2, r0, ARG1 ; \
bsr.n NAME ; \
or r3, r0, ARG2 ; \
addu r31, r31, 32
/* This define is similar to CALL, but accepts a function pointer XXX smurph */
#define CALLP(NAME, ARG1, ARG2) \
subu r31, r31, 32 ; \
or.u r5, r0, hi16(NAME) ; \
ld r4, r5, lo16(NAME) ; \
or r2, r0, ARG1 ; \
jsr.n r4 ; \
or r3, r0, ARG2 ; \
addu r31, r31, 32
/* This define can replace the xcr instruction XXX smurph */
#define XCR(DR, SR, CR) ; \
stcr r13, SR0 ; \
or r13, r0, SR ; \
ldcr DR, CR ; \
stcr r13, CR ; \
ldcr r13, SR0
/* This define can be used to debug sub routine returns XXX smurph*/
#define STORE_R1(varname) ; \
stcr r13, SR0 /* r13 now free */ ; \
/* save r1 to memory location varname */ ; \
or.u r13, r0, hi16(varname) ; \
st r1, r13, lo16(varname) ; \
ldcr r13, SR0 /* retore r13 */
/*
* SR1 - CPU FLAGS REGISTER
* XXX clean this when the trap handler is reworked. Among the things
* I like to see is having the trap frame on the kernel stack instead
* of putting in the PCB. If done properly, we don't need SR1 for doing
* anything special. nivas
*
* SR1 contains flags about the current CPU status.
*
* 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 2 /* 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 */
#define FLAG_FROM_KERNEL 8 /* bit number 8 */
#define FLAG_187 9 /* bit number 9 */
#define FLAG_188 10 /* bit number 10 */
#define FLAG_197 11 /* bit number 11 */
/* 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)
/*
* 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_NON_MASK_BIT 23 /* MVME197 Non-Maskable Interrupt */
#define DEBUG_197_READ_BIT 25 /* MVME198 Data Read Miss (Software Table Searches) */
#define DEBUG_197_WRITE_BIT 26 /* MVME198 Data Write Miss (Software Table Searches) */
#define DEBUG_197_INST_BIT 27 /* MVME198 Inst ATC Miss (Software Table Searches) */
#define DEBUG_UNKNOWN_BIT 31
/*
* These things for vector_init.c and locore.c
*/
#if defined(_LOCORE)
# 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
#ifndef CMMU_DEFS
#define CMMU_DEFS
#define SBC_CMMU_I 0xFFF77000 /* Single Board Computer code CMMU */
#define SBC_CMMU_D 0xFFF7F000 /* Single Board Computer data CMMU */
#define VME_CMMU_I0 0xFFF7E000 /* MVME188 code CMMU 0 */
#define VME_CMMU_I1 0xFFF7D000 /* MVME188 code CMMU 1 */
#define VME_CMMU_I2 0xFFF7B000 /* MVME188 code CMMU 2 */
#define VME_CMMU_I3 0xFFF77000 /* MVME188 code CMMU 3 */
#define VME_CMMU_D0 0xFFF6F000 /* MVME188 data CMMU 0 */
#define VME_CMMU_D1 0xFFF5F000 /* MVME188 data CMMU 1 */
#define VME_CMMU_D2 0xFFF3F000 /* MVME188 data CMMU 2 */
#define VME_CMMU_D3 0xFFF7F000 /* MVME188 data CMMU 3 */
#endif /* CMMU_DEFS */
#endif __MACHINE_M88K_ASM_H__
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