URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-m68k/] [entry.h] - Blame information for rev 1774

Go to most recent revision | Details | Compare with Previous | View Log


#ifndef __M68K_ENTRY_H
#define __M68K_ENTRY_H
 
#include <linux/config.h>
#include <asm/setup.h>
#include <asm/page.h>
 
/*
 * Stack layout in 'ret_from_exception':
 *
 *      This allows access to the syscall arguments in registers d1-d5
 *
 *       0(sp) - d1
 *       4(sp) - d2
 *       8(sp) - d3
 *       C(sp) - d4
 *      10(sp) - d5
 *      14(sp) - a0
 *      18(sp) - a1
 *      1C(sp) - a2
 *      20(sp) - d0
 *      24(sp) - orig_d0
 *      28(sp) - stack adjustment
 *      2C(sp) - sr
 *      2E(sp) - pc
 *      32(sp) - format & vector
 */
 
/*
 * 97/05/14 Andreas: Register %a2 is now set to the current task throughout
 *                   the whole kernel.
 */
 
/* the following macro is used when enabling interrupts */
#if defined(MACH_ATARI_ONLY) && !defined(CONFIG_HADES)
        /* block out HSYNC on the atari */
#define ALLOWINT 0xfbff
#define MAX_NOINT_IPL   3
#else
        /* portable version */
#define ALLOWINT 0xf8ff
#define MAX_NOINT_IPL   0
#endif /* machine compilation types */ 
 
#ifdef __ASSEMBLY__
 
#define curptr a2
 
LFLUSH_I_AND_D = 0x00000808
LSIGTRAP = 5
 
/* process bits for task_struct.ptrace */
PT_TRACESYS_OFF = 3
PT_TRACESYS_BIT = 1
PT_PTRACED_OFF = 3
PT_PTRACED_BIT = 0
PT_DTRACE_OFF = 3
PT_DTRACE_BIT = 2
 
#define SAVE_ALL_INT save_all_int
#define SAVE_ALL_SYS save_all_sys
#define RESTORE_ALL restore_all
/*
 * This defines the normal kernel pt-regs layout.
 *
 * regs a3-a6 and d6-d7 are preserved by C code
 * the kernel doesn't mess with usp unless it needs to
 */
 
/*
 * a -1 in the orig_d0 field signifies
 * that the stack frame is NOT for syscall
 */
.macro  save_all_int
        clrl    %sp@-           | stk_adj
        pea     -1:w            | orig d0
        movel   %d0,%sp@-       | d0
        moveml  %d1-%d5/%a0-%a1/%curptr,%sp@-
.endm
 
.macro  save_all_sys
        clrl    %sp@-           | stk_adj
        movel   %d0,%sp@-       | orig d0
        movel   %d0,%sp@-       | d0
        moveml  %d1-%d5/%a0-%a1/%curptr,%sp@-
.endm
 
.macro  restore_all
        moveml  %sp@+,%a0-%a1/%curptr/%d1-%d5
        movel   %sp@+,%d0
        addql   #4,%sp          | orig d0
        addl    %sp@+,%sp       | stk adj
        rte
.endm
 
#define SWITCH_STACK_SIZE (6*4+4)       /* includes return address */
 
#define SAVE_SWITCH_STACK save_switch_stack
#define RESTORE_SWITCH_STACK restore_switch_stack
#define GET_CURRENT(tmp) get_current tmp
 
.macro  save_switch_stack
        moveml  %a3-%a6/%d6-%d7,%sp@-
.endm
 
.macro  restore_switch_stack
        moveml  %sp@+,%a3-%a6/%d6-%d7
.endm
 
.macro  get_current reg=%d0
        movel   %sp,\reg
        andw    #-KTHREAD_SIZE,\reg
        movel   \reg,%curptr
.endm
 
#else /* C source */
 
#define STR(X) STR1(X)
#define STR1(X) #X
 
#define PT_OFF_ORIG_D0   0x24
#define PT_OFF_FORMATVEC 0x32
#define PT_OFF_SR        0x2C
#define SAVE_ALL_INT                            \
        "clrl   %%sp@-;"    /* stk_adj */       \
        "pea    -1:w;"      /* orig d0 = -1 */  \
        "movel  %%d0,%%sp@-;" /* d0 */          \
        "moveml %%d1-%%d5/%%a0-%%a2,%%sp@-"
#define GET_CURRENT(tmp) \
        "movel  %%sp,"#tmp"\n\t" \
        "andw   #-"STR(KTHREAD_SIZE)","#tmp"\n\t" \
        "movel  "#tmp",%%a2"
 
#endif
 
#endif /* __M68K_ENTRY_H */

Line No.	Rev	Author	Line
1	1276	phoenix	`#ifndef __M68K_ENTRY_H`
2			`#define __M68K_ENTRY_H`
3
4			`#include <linux/config.h>`
5			`#include <asm/setup.h>`
6			`#include <asm/page.h>`
7
8			`/*`
9			`* Stack layout in 'ret_from_exception':`
10			`*`
11			`* This allows access to the syscall arguments in registers d1-d5`
12			`*`
13			`* 0(sp) - d1`
14			`* 4(sp) - d2`
15			`* 8(sp) - d3`
16			`* C(sp) - d4`
17			`* 10(sp) - d5`
18			`* 14(sp) - a0`
19			`* 18(sp) - a1`
20			`* 1C(sp) - a2`
21			`* 20(sp) - d0`
22			`* 24(sp) - orig_d0`
23			`* 28(sp) - stack adjustment`
24			`* 2C(sp) - sr`
25			`* 2E(sp) - pc`
26			`* 32(sp) - format & vector`
27			`*/`
28
29			`/*`
30			`* 97/05/14 Andreas: Register %a2 is now set to the current task throughout`
31			`* the whole kernel.`
32			`*/`
33
34			`/* the following macro is used when enabling interrupts */`
35			`#if defined(MACH_ATARI_ONLY) && !defined(CONFIG_HADES)`
36			`/* block out HSYNC on the atari */`
37			`#define ALLOWINT 0xfbff`
38			`#define MAX_NOINT_IPL 3`
39			`#else`
40			`/* portable version */`
41			`#define ALLOWINT 0xf8ff`
42			`#define MAX_NOINT_IPL 0`
43			`#endif /* machine compilation types */`
44
45			`#ifdef __ASSEMBLY__`
46
47			`#define curptr a2`
48
49			`LFLUSH_I_AND_D = 0x00000808`
50			`LSIGTRAP = 5`
51
52			`/* process bits for task_struct.ptrace */`
53			`PT_TRACESYS_OFF = 3`
54			`PT_TRACESYS_BIT = 1`
55			`PT_PTRACED_OFF = 3`
56			`PT_PTRACED_BIT = 0`
57			`PT_DTRACE_OFF = 3`
58			`PT_DTRACE_BIT = 2`
59
60			`#define SAVE_ALL_INT save_all_int`
61			`#define SAVE_ALL_SYS save_all_sys`
62			`#define RESTORE_ALL restore_all`
63			`/*`
64			`* This defines the normal kernel pt-regs layout.`
65			`*`
66			`* regs a3-a6 and d6-d7 are preserved by C code`
67			`* the kernel doesn't mess with usp unless it needs to`
68			`*/`
69
70			`/*`
71			`* a -1 in the orig_d0 field signifies`
72			`* that the stack frame is NOT for syscall`
73			`*/`
74			`.macro save_all_int`
75			`clrl %sp@- \| stk_adj`
76			`pea -1:w \| orig d0`
77			`movel %d0,%sp@- \| d0`
78			`moveml %d1-%d5/%a0-%a1/%curptr,%sp@-`
79			`.endm`
80
81			`.macro save_all_sys`
82			`clrl %sp@- \| stk_adj`
83			`movel %d0,%sp@- \| orig d0`
84			`movel %d0,%sp@- \| d0`
85			`moveml %d1-%d5/%a0-%a1/%curptr,%sp@-`
86			`.endm`
87
88			`.macro restore_all`
89			`moveml %sp@+,%a0-%a1/%curptr/%d1-%d5`
90			`movel %sp@+,%d0`
91			`addql #4,%sp \| orig d0`
92			`addl %sp@+,%sp \| stk adj`
93			`rte`
94			`.endm`
95
96			`#define SWITCH_STACK_SIZE (64+4) / includes return address */`
97
98			`#define SAVE_SWITCH_STACK save_switch_stack`
99			`#define RESTORE_SWITCH_STACK restore_switch_stack`
100			`#define GET_CURRENT(tmp) get_current tmp`
101
102			`.macro save_switch_stack`
103			`moveml %a3-%a6/%d6-%d7,%sp@-`
104			`.endm`
105
106			`.macro restore_switch_stack`
107			`moveml %sp@+,%a3-%a6/%d6-%d7`
108			`.endm`
109
110			`.macro get_current reg=%d0`
111			`movel %sp,\reg`
112			`andw #-KTHREAD_SIZE,\reg`
113			`movel \reg,%curptr`
114			`.endm`
115
116			`#else /* C source */`
117
118			`#define STR(X) STR1(X)`
119			`#define STR1(X) #X`
120
121			`#define PT_OFF_ORIG_D0 0x24`
122			`#define PT_OFF_FORMATVEC 0x32`
123			`#define PT_OFF_SR 0x2C`
124			`#define SAVE_ALL_INT \`
125			`"clrl %%sp@-;" /* stk_adj */ \`
126			`"pea -1:w;" /* orig d0 = -1 */ \`
127			`"movel %%d0,%%sp@-;" /* d0 */ \`
128			`"moveml %%d1-%%d5/%%a0-%%a2,%%sp@-"`
129			`#define GET_CURRENT(tmp) \`
130			`"movel %%sp,"#tmp"\n\t" \`
131			`"andw #-"STR(KTHREAD_SIZE)","#tmp"\n\t" \`
132			`"movel "#tmp",%%a2"`
133
134			`#endif`
135
136			`#endif /* __M68K_ENTRY_H */`

Browse

Tools

Subversion Repositories or1k

[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-m68k/] [entry.h] - Blame information for rev 1774