Home | History | Annotate | Line # | Download | only in common
romcalls.S revision 1.3 
      1 /*	$NetBSD: romcalls.S,v 1.3 2002/04/13 02:43:44 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include <mips/asm.h>
     30 #include <mips/cpuregs.h>
     31 #include <machine/romcall.h>
     32 
     33 	.text
     34 	.align	2
     35 	.set	noreorder
     36 
     37 	.globl	rom_halt
     38 rom_halt:
     39 	addu	sp, sp, -16
     40 	li	a0, 8		# RB_HALT
     41 	sw	a0, 0(sp)
     42 	li	a0, SYS_reboot
     43 	move	a1, sp
     44 	syscall
     45 	nop
     46 
     47 	.globl	rom_open
     48 rom_open:
     49 	addu	sp, sp, -32
     50 	sw	ra, 28(sp)
     51 
     52 	sw	a0, 16(sp)
     53 	sw	a1, 20(sp)
     54 
     55 	li	a0, SYS_open
     56 	addu	a1, sp, 16
     57 	syscall
     58 	nop
     59 
     60 	lw	ra, 28(sp)
     61 	addu	sp, sp, 32
     62 	j	ra
     63 	nop
     64 
     65 	.globl	rom_close
     66 rom_close:
     67 	addu	sp, sp, -32
     68 	sw	ra, 28(sp)
     69 
     70 	sw	a0, 16(sp)
     71 
     72 	li	a0, SYS_close
     73 	addu	a1, sp, 16
     74 	syscall
     75 	nop
     76 
     77 	lw	ra, 28(sp)
     78 	addu	sp, sp, 32
     79 	j	ra
     80 	nop
     81 
     82 	.globl	rom_read
     83 rom_read:
     84 	addu	sp, sp, -32
     85 	sw	ra, 28(sp)
     86 
     87 	sw	a0, 16(sp)
     88 	sw	a1, 20(sp)
     89 	sw	a2, 24(sp)
     90 
     91 	li	a0, SYS_read
     92 	addu	a1, sp, 16
     93 	syscall
     94 	nop
     95 
     96 	lw	ra, 28(sp)
     97 	addu	sp, sp, 32
     98 	j	ra
     99 	nop
    100 
    101 	.globl	rom_write
    102 rom_write:
    103 	addu	sp, sp, -32
    104 	sw	ra, 28(sp)
    105 
    106 	sw	a0, 16(sp)
    107 	sw	a1, 20(sp)
    108 	sw	a2, 24(sp)
    109 
    110 	li	a0, SYS_write
    111 	addu	a1, sp, 16
    112 	syscall
    113 	nop
    114 
    115 	lw	ra, 28(sp)
    116 	addu	sp, sp, 32
    117 	j	ra
    118 	nop
    119 
    120 
    121 	.globl	rom_lseek
    122 rom_lseek:
    123 	addu	sp, sp, -32
    124 	sw	ra, 28(sp)
    125 
    126 	sw	a0, 16(sp)
    127 	sw	a1, 20(sp)
    128 	sw	a2, 24(sp)
    129 
    130 	li	a0, SYS_lseek
    131 	addu	a1, sp, 16
    132 	syscall
    133 	nop
    134 
    135 	lw	ra, 28(sp)
    136 	addu	sp, sp, 32
    137 	j	ra
    138 	nop
    139