reg.h
资源名称:ixp425BSP.rar [点击查看]
上传用户:luoyougen
上传日期:2008-05-12
资源大小:23136k
文件大小:6k
源码类别:
VxWorks
开发平台:
C/C++
- /* @(#)reg.h 1.1 86/07/07 SMI */
- /* Copyright 1984-1992 Wind River Systems, Inc. */
- /*
- * Copyright (c) 1986 by Sun Microsystems, Inc.
- */
- /*
- modification history
- --------------------
- 02d,15mar00,dra Added ColdFire support
- 02d,19oct01,dee Merge from T2.1.0 release
- 02c,30jul93,jwt added architecture-specific conditional for 68K register set.
- 02b,22sep92,rrr added support for c++
- 02a,04jul92,jcf cleaned up.
- 01c,26may92,rrr the tree shuffle
- 01b,04oct91,rrr passed through the ansification filter
- -changed copyright notice
- 01a,05oct90,shl added copyright notice.
- */
- #ifndef __INCregh
- #define __INCregh
- #ifdef __cplusplus
- extern "C" {
- #endif
- #if (CPU_FAMILY == MC680X0) || (CPU_FAMILY == COLDFIRE)
- /*
- * Location of the users' stored
- * registers relative to R0.
- * Usage is u.u_ar0[XX].
- */
- #define R0 (0)
- #define R1 (1)
- #define R2 (2)
- #define R3 (3)
- #define R4 (4)
- #define R5 (5)
- #define R6 (6)
- #define R7 (7)
- #define AR0 (8)
- #define AR1 (9)
- #define AR2 (10)
- #define AR3 (11)
- #define AR4 (12)
- #define AR5 (13)
- #define AR6 (14)
- #define AR7 (15)
- #define SP (15)
- #define PS (16)
- #define PC (17)
- /*
- * And now for something completely the same...
- */
- #ifndef LOCORE
- struct regs {
- int r_dreg[8]; /* data registers */
- #define r_r0 r_dreg[0] /* r0 for portability */
- int r_areg[8]; /* address registers */
- #define r_sp r_areg[7] /* user stack pointer */
- int r_sr; /* status register (actually a short) */
- #define r_ps r_sr
- int r_pc; /* program counter */
- };
- struct stkfmt {
- int f_stkfmt : 4; /* stack format */
- int : 2;
- int f_vector : 10; /* vector offset */
- short f_beibase; /* start of bus error info (if any) */
- };
- /*
- * Struct for floating point registers and general state
- * for the MC68881 (the sky fpp has no user visible state).
- * If fps_flags == FPS_UNUSED, the other 68881 fields have no meaning.
- * fps_code and fps_flags are software implemented fields.
- * fps_flags is not used when set by user level programs,
- * but changing fps_code has the side effect of changing u.u_code.
- */
- typedef struct ext_fp {
- int fp[3];
- } ext_fp; /* extended 96-bit 68881 fp registers */
- struct fp_status {
- ext_fp fps_regs[8]; /* 68881 floating point regs */
- int fps_control; /* 68881 control reg */
- int fps_status; /* 68881 status reg */
- int fps_iaddr; /* 68881 instruction address reg */
- int fps_code; /* additional word for signals */
- int fps_flags; /* r/o - unused, idle or busy */
- };
- #endif /* !LOCORE */
- /*
- * Values defined for `fps_flags'.
- */
- #define FPS_UNUSED 0 /* 68881 never used yet */
- #define FPS_IDLE 1 /* 68881 instruction completed */
- #define FPS_BUSY 2 /* 68881 instruction interrupted */
- /*
- * The EXT_FPS_FLAGS() macro is used to convert a pointer to an
- * fp_istate into a value to be used for the user visible state
- * found in fps_flags. As a speed optimization, this convertion
- * is only done is required (e.g. the PTRACE_GETFPREGS ptrace
- * call or when dumping core) instead of on each context switch.
- * The tests that we base the state on are that a fpis_vers of
- * FPIS_VERSNULL means NULL state, else a fpis_bufsiz of FPIS_IDLESZ
- * means IDLE state, else we assume BUSY state.
- */
- #define FPIS_VERSNULL 0x0
- #define FPIS_IDLESIZE 0x18
- #define EXT_FPS_FLAGS(istatep)
- ((istatep)->fpis_vers == FPIS_VERSNULL ? FPS_UNUSED :
- (istatep)->fpis_bufsiz == FPIS_IDLESIZE ? FPS_IDLE : FPS_BUSY)
- #ifndef LOCORE
- /*
- * Struct for the internal state of the MC68881
- * Although the MC68881 can have a smaller maximum for
- * internal state, we allow for more to allow for expansion.
- */
- #define FPIS_BUFSIZ 0xc0
- struct fp_istate {
- unsigned char fpis_vers; /* version number */
- unsigned char fpis_bufsiz; /* size of info in fpis_buf */
- unsigned short fpis_reserved; /* reserved word */
- unsigned char fpis_buf[FPIS_BUFSIZ]; /* fpp internal state buffer */
- };
- /*
- * Structures for the status and data registers are defined here.
- * Struct fpa_status are included in the u area.
- * Struct fpa_regs is included in struct core.
- */
- /* struct fpa_status is saved/restored during context switch */
- struct fpa_status {
- unsigned int fpas_state; /* STATE, supervisor privileged reg */
- unsigned int fpas_imask; /* IMASK */
- unsigned int fpas_load_ptr; /* LOAD_PTR */
- unsigned int fpas_ierr; /* IERR */
- unsigned int fpas_act_instr; /* pipe active instruction halves */
- unsigned int fpas_nxt_instr; /* pipe next instruction halves */
- unsigned int fpas_act_d1half;/* pipe active data first half */
- unsigned int fpas_act_d2half;/* pipe active data second half */
- unsigned int fpas_nxt_d1half;/* pipe next data first half */
- unsigned int fpas_nxt_d2half;/* pipe next data second half */
- unsigned int fpas_mode3_0; /* FPA MODE3_0 register */
- unsigned int fpas_wstatus; /* FPA WSTATUS register */
- };
- /*
- * Since there are 32 contexts supported by the FPA hardware,
- * when we do context switch on the FPA, we don't save/restore
- * the data registers between the FPA and the u area.
- * If there are already 32 processes using the fpa concurrently,
- * we give an error message to the 33rd process trying to use the fpa.
- * (Hopefully there will not be this many processes using FPA concurrently.)
- */
- #define FPA_NCONTEXTS 32
- #define FPA_NDATA_REGS 32
- typedef struct fpa_long {
- int fpl_data[2];
- } fpa_long; /* 64 bit double precision registers */
- /* Struct fpa_regs is included in struct core. */
- struct fpa_regs {
- unsigned int fpar_flags; /* if zero, other fields are meaningless */
- struct fpa_status fpar_status;
- fpa_long fpar_data[FPA_NDATA_REGS];
- };
- #endif /* CPU_FAMILY == MC680X0 || CPU_FAMILY == COLDFIRE */
- #endif /* !LOCORE */
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCregh */