1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * arch/alpha/lib/callback_srm.S
4 */
5
6 #include <linux/export.h>
7 #include <asm/console.h>
8
9 .text
10 #define HWRPB_CRB_OFFSET 0xc0
11
12 #if defined(CONFIG_ALPHA_SRM) || defined(CONFI
13 .align 4
14 srm_dispatch:
15 #if defined(CONFIG_ALPHA_GENERIC)
16 ldl $4,alpha_using_srm
17 beq $4,nosrm
18 #endif
19 ldq $0,hwrpb # gp is set up
20 ldl $25,0($25) # Pick up the
21 mov $20,$21 # Shift argume
22 mov $19,$20
23 ldq $1,HWRPB_CRB_OFFSET($0)
24 mov $18,$19
25 mov $17,$18
26 mov $16,$17
27 addq $0,$1,$2 # CRB address
28 ldq $27,0($2) # DISPATCH pro
29 extwl $25,0,$16 # SRM callback
30 ldq $3,8($27) # call address
31 extwl $25,2,$25 # argument inf
32 jmp ($3) # Return direc
33
34 .align 4
35 .globl srm_fixup
36 .ent srm_fixup
37 srm_fixup:
38 ldgp $29,0($27)
39 #if defined(CONFIG_ALPHA_GENERIC)
40 ldl $4,alpha_using_srm
41 beq $4,nosrm
42 #endif
43 ldq $0,hwrpb
44 ldq $1,HWRPB_CRB_OFFSET($0)
45 addq $0,$1,$2 # CRB address
46 ldq $27,16($2) # VA of FIXUP
47 ldq $3,8($27) # call address
48 lda $25,2($31) # two integer
49 jmp ($3) # Return direc
50 .end srm_fixup
51
52 #if defined(CONFIG_ALPHA_GENERIC)
53 .align 3
54 nosrm:
55 lda $0,-1($31)
56 ret
57 #endif
58
59 #define CALLBACK(NAME, CODE, ARG_CNT) \
60 .align 4; .globl callback_##NAME; .ent callbac
61 ldgp $29,0($27); br $25,srm_dispatch; .word CO
62
63 #else /* defined(CONFIG_ALPHA_SRM) || defined(
64
65 #define CALLBACK(NAME, CODE, ARG_CNT) \
66 .align 3; .globl callback_##NAME; .ent callbac
67 lda $0,-1($31); ret; .end callback_##NAME
68
69 .align 3
70 .globl srm_fixup
71 .ent srm_fixup
72 srm_fixup:
73 lda $0,-1($31)
74 ret
75 .end srm_fixup
76 #endif /* defined(CONFIG_ALPHA_SRM) || defined
77
78 CALLBACK(puts, CCB_PUTS, 4)
79 CALLBACK(open, CCB_OPEN, 3)
80 CALLBACK(close, CCB_CLOSE, 2)
81 CALLBACK(read, CCB_READ, 5)
82 CALLBACK(open_console, CCB_OPEN_CONSOLE, 1)
83 CALLBACK(close_console, CCB_CLOSE_CONSOLE, 1)
84 CALLBACK(getenv, CCB_GET_ENV, 4)
85 CALLBACK(setenv, CCB_SET_ENV, 4)
86 CALLBACK(getc, CCB_GETC, 2)
87 CALLBACK(reset_term, CCB_RESET_TERM, 2)
88 CALLBACK(term_int, CCB_SET_TERM_INT, 3)
89 CALLBACK(term_ctl, CCB_SET_TERM_CTL, 3)
90 CALLBACK(process_keycode, CCB_PROCESS_KEYCODE,
91 CALLBACK(ioctl, CCB_IOCTL, 6)
92 CALLBACK(write, CCB_WRITE, 5)
93 CALLBACK(reset_env, CCB_RESET_ENV, 4)
94 CALLBACK(save_env, CCB_SAVE_ENV, 1)
95 CALLBACK(pswitch, CCB_PSWITCH, 3)
96 CALLBACK(bios_emul, CCB_BIOS_EMUL, 5)
97
98 EXPORT_SYMBOL(callback_getenv)
99 EXPORT_SYMBOL(callback_setenv)
100 EXPORT_SYMBOL(callback_save_env)
101
102 .data
103 __alpha_using_srm: # For use by b
104 .long 7 # value is not
105 .weak alpha_using_srm; alpha_using_srm
106 __callback_init_done: # For use by b
107 .long 7 # value is not
108 .weak callback_init_done; callback_ini
109
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