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