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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libcpu/] [sparc/] [syscall/] [syscall.S] - Blame information for rev 507

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/*
 *  systrap.S
 *
 *  This file contains emulated system calls using software trap 0.
 *  The following calls are supported:
 *
 *    + SYS_exit        (halt)
 *    + SYS_irqdis      (disable interrupts)
 *    + SYS_irqset      (set interrupt level)
 *
 *  COPYRIGHT:
 *
 *  COPYRIGHT (c) 1995. European Space Agency.
 *
 *  This terms of the RTEMS license apply to this file.
 *
 */
 
#include 
#include "syscall.h"
 
        .seg    "text"
        /*
         *  system call
         *
         *  On entry:
         *
         *    l0 = psr (from trap table)
         *    l1 = pc
         *    l2 = npc
         *    g1 = system call id
         */
 
        PUBLIC(syscall)
 
SYM(syscall):
 
        subcc   %g1, 2, %g0             ! syscall 2, disable interrupts
        bne     3f
        or      %l0, 0x0f00, %l4        ! set PIL=15
        mov     %l4, %psr
        or      %l0, SPARC_PSR_ET_MASK, %i0     ! return old psr with ET=1
        ba,a    9f
3:
        subcc   %g1, 3, %g0             ! syscall 3, enable interrupts
        bne     1f
        and     %i0, SPARC_PSR_PIL_MASK, %l4
        andn    %l0, SPARC_PSR_PIL_MASK, %l5
        or      %l5, %l4, %l4
        mov     %l4, %psr
        ba,a    9f
 
1:
        ta      0                        ! halt
9:                                      ! leave
        mov     0, %g1                  ! clear %g1
        jmpl    %l2, %g0
        rett    %l2 + 4
 
        PUBLIC(sparc_disable_interrupts)
 
SYM(sparc_disable_interrupts):
 
        mov     SYS_irqdis, %g1
        ta      0
        retl
        nop
 
        PUBLIC(sparc_enable_interrupts)
 
SYM(sparc_enable_interrupts):
 
        mov     SYS_irqen, %g1
        ta      0
        retl
        nop
 
/* end of file */

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* systrap.S`
3			`*`
4			`* This file contains emulated system calls using software trap 0.`
5			`* The following calls are supported:`
6			`*`
7			`* + SYS_exit (halt)`
8			`* + SYS_irqdis (disable interrupts)`
9			`* + SYS_irqset (set interrupt level)`
10			`*`
11			`* COPYRIGHT:`
12			`*`
13			`* COPYRIGHT (c) 1995. European Space Agency.`
14			`*`
15			`* This terms of the RTEMS license apply to this file.`
16			`*`
17			`*/`
18
19			`#include`
20			`#include "syscall.h"`
21
22			`.seg "text"`
23			`/*`
24			`* system call`
25			`*`
26			`* On entry:`
27			`*`
28			`* l0 = psr (from trap table)`
29			`* l1 = pc`
30			`* l2 = npc`
31			`* g1 = system call id`
32			`*/`
33
34			`PUBLIC(syscall)`
35
36			`SYM(syscall):`
37
38			`subcc %g1, 2, %g0 ! syscall 2, disable interrupts`
39			`bne 3f`
40			`or %l0, 0x0f00, %l4 ! set PIL=15`
41			`mov %l4, %psr`
42			`or %l0, SPARC_PSR_ET_MASK, %i0 ! return old psr with ET=1`
43			`ba,a 9f`
44			`3:`
45			`subcc %g1, 3, %g0 ! syscall 3, enable interrupts`
46			`bne 1f`
47			`and %i0, SPARC_PSR_PIL_MASK, %l4`
48			`andn %l0, SPARC_PSR_PIL_MASK, %l5`
49			`or %l5, %l4, %l4`
50			`mov %l4, %psr`
51			`ba,a 9f`
52
53			`1:`
54			`ta 0 ! halt`
55			`9: ! leave`
56			`mov 0, %g1 ! clear %g1`
57			`jmpl %l2, %g0`
58			`rett %l2 + 4`
59
60			`PUBLIC(sparc_disable_interrupts)`
61
62			`SYM(sparc_disable_interrupts):`
63
64			`mov SYS_irqdis, %g1`
65			`ta 0`
66			`retl`
67			`nop`
68
69			`PUBLIC(sparc_enable_interrupts)`
70
71			`SYM(sparc_enable_interrupts):`
72
73			`mov SYS_irqen, %g1`
74			`ta 0`
75			`retl`
76			`nop`
77
78			`/* end of file */`

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libcpu/] [sparc/] [syscall/] [syscall.S] - Blame information for rev 507