source: trunk/libs/newlib/src/libgloss/nds32/vh.h @ 620

#ifndef _VH_H
#define _VH_H

/*
BREAK #SWID definition:
0x00 – 0x1F: Free to use
0x20 – 0x1FF: Reserved for EX9
0x0200 – 0x7EFF: Free to use
0x7F00 – 0x7FFF: Reserved for virtual hosting
*/
/* These are #SWID defined for Virtual Hosting. */
#define VH_FOPEN        0x7F00
#define VH_FREOPEN      0x7F01
#define VH_FCLOSE       0x7F02
#define VH_FFLUSH       0x7F03
#define VH_FREAD        0x7F04
#define VH_FWRITE       0x7F05
#define VH_FGETC        0x7F06
#define VH_FGETS        0x7F07
#define VH_FPUTC        0x7F08
#define VH_FPUTS        0x7F09
#define VH_UNGETC       0x7F0A
#define VH_FTELL        0x7F0B
#define VH_FSEEK        0x7F0C
#define VH_REWIND       0x7F0D
#define VH_CLEARERR     0x7F0E
#define VH_FEOF         0x7F0F
#define VH_FERROR       0x7F10
#define VH_REMOVE       0x7F11
#define VH_TMPFILE      0x7F12
/* From here, define Low-level routines. */
#define VH_EXIT         0x7F20
#define VH_OPEN         0x7F21
#define VH_CLOSE        0x7F22
#define VH_READ         0x7F23
#define VH_WRITE        0x7F24
#define VH_LSEEK        0x7F25
#define VH_UNLINK       0x7F26
#define VH_RENAME       0x7F27
#define VH_FSTAT        0x7F28
#define VH_STAT         0x7F29
#define VH_GETTIMEOFDAY 0x7F2A
#define VH_ISATTY       0x7F2B
#define VH_SYSTEM       0x7F2C
#define VH_GETERR       0x7F2D  /* The method we get errno.  */
#define VH_GETPID       0x7F2E
#define VH_KILL         0x7F2F
#define VH_TIMES        0x7F30


/* Define macros that generate assembly output.
   Generate a System Call exception to notify GDB
   to handle this virtual I/O routine.  */

.macro TYPE0 name num
/* If r0 is not NULL(0), set errno.  */
        .text
        .global \name
        .type   \name, @function
        .align  2
\name:
        BREAK   \num            /* Generate_Exception(Breakpoint);  */
        bnez    $r0, 1f         /* Branch if success.
                                   r0 value is not NULL(0).  */
        BREAK   VH_GETERR
        l.w     $r15, _impure_ptr
        swi     $r0, [$r15]     /* Set errno.  */
        move    $r0, 0          /* Set return value as 0.  */
1:
        ret
        .size   \name, .-\name
.endm

.macro TYPE1 name num
/* If r0 is EOF(-1), set errno.  */
        .text
        .global \name
        .type   \name, @function
        .align  2
\name:
        BREAK   \num            /* Generate_Exception(Breakpoint);  */
        addi    $r15, $r0, 1
        bnezs8  1f              /* Branch if success.
                                   r0 value is EOF(-1).  */
        BREAK   VH_GETERR
        l.w     $r15, _impure_ptr
        swi     $r0, [$r15]     /* Set errno.  */
        move    $r0, -1         /* Set return value as -1.  */
1:
        ret
        .size   \name, .-\name
.endm

.macro TYPE2 name num
/* If r0 is less than r2, set errno.  */
        .text
        .global \name
        .type   \name, @function
        .align  2
\name:
        BREAK   \num            /* Generate_Exception(Breakpoint);  */
        slt     $r15, $r0, $r2  /* If r15 is set, set errno.  */
        beqzs8  1f              /* Branch if success.
                                   r15 is zero.  */
        move    $r4, $r0        /* Keep return value r0.  */
        BREAK   VH_GETERR
        l.w     $r15, _impure_ptr
        swi     $r0, [$r15]     /* Set errno.  */
        move    $r0, $r4        /* Restore r0.  */
1:
        ret
        .size   \name, .-\name
.endm

.macro TYPE3 name num
/* No errors are defined.  */
        .text
        .global \name
        .type   \name, @function
        .align  2
\name:
        BREAK   \num            /* Generate_Exception(Breakpoint);  */
        ret
        .size   \name, .-\name
.endm
#endif /* _VH_H */