The x86 timer interrupt handler is the only handler not traced in the
[linux-2.6/next.git] / arch / alpha / lib / callback_srm.S
blob8804bec2c6448e15e5f34be99b25e9bef8518a15
1 /*
2  *      arch/alpha/lib/callback_srm.S
3  */
5 #include <asm/console.h>
7 .text
8 #define HWRPB_CRB_OFFSET 0xc0
10 #if defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC)
11 .align 4
12 srm_dispatch:
13 #if defined(CONFIG_ALPHA_GENERIC)
14         ldl     $4,alpha_using_srm
15         beq     $4,nosrm
16 #endif
17         ldq     $0,hwrpb        # gp is set up by CALLBACK macro.
18         ldl     $25,0($25)      # Pick up the wrapper data.
19         mov     $20,$21         # Shift arguments right.
20         mov     $19,$20
21         ldq     $1,HWRPB_CRB_OFFSET($0)
22         mov     $18,$19
23         mov     $17,$18
24         mov     $16,$17
25         addq    $0,$1,$2        # CRB address
26         ldq     $27,0($2)       # DISPATCH procedure descriptor (VMS call std)
27         extwl   $25,0,$16       # SRM callback function code
28         ldq     $3,8($27)       # call address
29         extwl   $25,2,$25       # argument information (VMS calling std)
30         jmp     ($3)            # Return directly to caller of wrapper.
32 .align 4
33 .globl  srm_fixup
34 .ent    srm_fixup
35 srm_fixup:
36         ldgp    $29,0($27)
37 #if defined(CONFIG_ALPHA_GENERIC)
38         ldl     $4,alpha_using_srm
39         beq     $4,nosrm
40 #endif
41         ldq     $0,hwrpb
42         ldq     $1,HWRPB_CRB_OFFSET($0)
43         addq    $0,$1,$2        # CRB address
44         ldq     $27,16($2)      # VA of FIXUP procedure descriptor
45         ldq     $3,8($27)       # call address
46         lda     $25,2($31)      # two integer arguments
47         jmp     ($3)            # Return directly to caller of srm_fixup.
48 .end    srm_fixup
50 #if defined(CONFIG_ALPHA_GENERIC)
51 .align 3
52 nosrm:
53         lda     $0,-1($31)
54         ret
55 #endif
57 #define CALLBACK(NAME, CODE, ARG_CNT) \
58 .align 4; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \
59 ldgp $29,0($27); br $25,srm_dispatch; .word CODE, ARG_CNT; .end callback_##NAME
61 #else /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */
63 #define CALLBACK(NAME, CODE, ARG_CNT) \
64 .align 3; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \
65 lda $0,-1($31); ret; .end callback_##NAME
67 .align 3
68 .globl  srm_fixup
69 .ent    srm_fixup
70 srm_fixup:
71         lda     $0,-1($31)
72         ret
73 .end    srm_fixup
74 #endif /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */
76 CALLBACK(puts, CCB_PUTS, 4)
77 CALLBACK(open, CCB_OPEN, 3)
78 CALLBACK(close, CCB_CLOSE, 2)
79 CALLBACK(read, CCB_READ, 5)
80 CALLBACK(open_console, CCB_OPEN_CONSOLE, 1)
81 CALLBACK(close_console, CCB_CLOSE_CONSOLE, 1)
82 CALLBACK(getenv, CCB_GET_ENV, 4)
83 CALLBACK(setenv, CCB_SET_ENV, 4)
84 CALLBACK(getc, CCB_GETC, 2)
85 CALLBACK(reset_term, CCB_RESET_TERM, 2)
86 CALLBACK(term_int, CCB_SET_TERM_INT, 3)
87 CALLBACK(term_ctl, CCB_SET_TERM_CTL, 3)
88 CALLBACK(process_keycode, CCB_PROCESS_KEYCODE, 3)
89 CALLBACK(ioctl, CCB_IOCTL, 6)
90 CALLBACK(write, CCB_WRITE, 5)
91 CALLBACK(reset_env, CCB_RESET_ENV, 4)
92 CALLBACK(save_env, CCB_SAVE_ENV, 1)
93 CALLBACK(pswitch, CCB_PSWITCH, 3)
94 CALLBACK(bios_emul, CCB_BIOS_EMUL, 5)
95         
96 .data
97 __alpha_using_srm:              # For use by bootpheader
98         .long 7                 # value is not 1 for link debugging
99         .weak alpha_using_srm; alpha_using_srm = __alpha_using_srm
100 __callback_init_done:           # For use by bootpheader
101         .long 7                 # value is not 1 for link debugging
102         .weak callback_init_done; callback_init_done = __callback_init_done