Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * arch/alpha/lib/callback_srm.S | |
3 | */ | |
4 | ||
1da177e4 | 5 | #include <asm/console.h> |
00fc0e0d | 6 | #include <asm/export.h> |
1da177e4 LT |
7 | |
8 | .text | |
9 | #define HWRPB_CRB_OFFSET 0xc0 | |
10 | ||
11 | #if defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) | |
12 | .align 4 | |
13 | srm_dispatch: | |
14 | #if defined(CONFIG_ALPHA_GENERIC) | |
15 | ldl $4,alpha_using_srm | |
16 | beq $4,nosrm | |
17 | #endif | |
18 | ldq $0,hwrpb # gp is set up by CALLBACK macro. | |
19 | ldl $25,0($25) # Pick up the wrapper data. | |
20 | mov $20,$21 # Shift arguments right. | |
21 | mov $19,$20 | |
22 | ldq $1,HWRPB_CRB_OFFSET($0) | |
23 | mov $18,$19 | |
24 | mov $17,$18 | |
25 | mov $16,$17 | |
26 | addq $0,$1,$2 # CRB address | |
27 | ldq $27,0($2) # DISPATCH procedure descriptor (VMS call std) | |
28 | extwl $25,0,$16 # SRM callback function code | |
29 | ldq $3,8($27) # call address | |
30 | extwl $25,2,$25 # argument information (VMS calling std) | |
31 | jmp ($3) # Return directly to caller of wrapper. | |
32 | ||
33 | .align 4 | |
34 | .globl srm_fixup | |
35 | .ent srm_fixup | |
36 | srm_fixup: | |
37 | ldgp $29,0($27) | |
38 | #if defined(CONFIG_ALPHA_GENERIC) | |
39 | ldl $4,alpha_using_srm | |
40 | beq $4,nosrm | |
41 | #endif | |
42 | ldq $0,hwrpb | |
43 | ldq $1,HWRPB_CRB_OFFSET($0) | |
44 | addq $0,$1,$2 # CRB address | |
45 | ldq $27,16($2) # VA of FIXUP procedure descriptor | |
46 | ldq $3,8($27) # call address | |
47 | lda $25,2($31) # two integer arguments | |
48 | jmp ($3) # Return directly to caller of srm_fixup. | |
49 | .end srm_fixup | |
50 | ||
51 | #if defined(CONFIG_ALPHA_GENERIC) | |
52 | .align 3 | |
53 | nosrm: | |
54 | lda $0,-1($31) | |
55 | ret | |
56 | #endif | |
57 | ||
58 | #define CALLBACK(NAME, CODE, ARG_CNT) \ | |
59 | .align 4; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \ | |
60 | ldgp $29,0($27); br $25,srm_dispatch; .word CODE, ARG_CNT; .end callback_##NAME | |
61 | ||
62 | #else /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */ | |
63 | ||
64 | #define CALLBACK(NAME, CODE, ARG_CNT) \ | |
65 | .align 3; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \ | |
66 | lda $0,-1($31); ret; .end callback_##NAME | |
67 | ||
68 | .align 3 | |
69 | .globl srm_fixup | |
70 | .ent srm_fixup | |
71 | srm_fixup: | |
72 | lda $0,-1($31) | |
73 | ret | |
74 | .end srm_fixup | |
75 | #endif /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */ | |
76 | ||
77 | CALLBACK(puts, CCB_PUTS, 4) | |
78 | CALLBACK(open, CCB_OPEN, 3) | |
79 | CALLBACK(close, CCB_CLOSE, 2) | |
80 | CALLBACK(read, CCB_READ, 5) | |
81 | CALLBACK(open_console, CCB_OPEN_CONSOLE, 1) | |
82 | CALLBACK(close_console, CCB_CLOSE_CONSOLE, 1) | |
83 | CALLBACK(getenv, CCB_GET_ENV, 4) | |
84 | CALLBACK(setenv, CCB_SET_ENV, 4) | |
85 | CALLBACK(getc, CCB_GETC, 2) | |
86 | CALLBACK(reset_term, CCB_RESET_TERM, 2) | |
87 | CALLBACK(term_int, CCB_SET_TERM_INT, 3) | |
88 | CALLBACK(term_ctl, CCB_SET_TERM_CTL, 3) | |
89 | CALLBACK(process_keycode, CCB_PROCESS_KEYCODE, 3) | |
90 | CALLBACK(ioctl, CCB_IOCTL, 6) | |
91 | CALLBACK(write, CCB_WRITE, 5) | |
92 | CALLBACK(reset_env, CCB_RESET_ENV, 4) | |
93 | CALLBACK(save_env, CCB_SAVE_ENV, 1) | |
94 | CALLBACK(pswitch, CCB_PSWITCH, 3) | |
95 | CALLBACK(bios_emul, CCB_BIOS_EMUL, 5) | |
00fc0e0d AV |
96 | |
97 | EXPORT_SYMBOL(callback_getenv) | |
98 | EXPORT_SYMBOL(callback_setenv) | |
99 | EXPORT_SYMBOL(callback_save_env) | |
1da177e4 LT |
100 | |
101 | .data | |
102 | __alpha_using_srm: # For use by bootpheader | |
103 | .long 7 # value is not 1 for link debugging | |
104 | .weak alpha_using_srm; alpha_using_srm = __alpha_using_srm | |
105 | __callback_init_done: # For use by bootpheader | |
106 | .long 7 # value is not 1 for link debugging | |
107 | .weak callback_init_done; callback_init_done = __callback_init_done | |
108 |