2 * arch/alpha/lib/callback_srm.S
5 #include <asm/console.h>
8 #define HWRPB_CRB_OFFSET 0xc0
10 #if defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC)
13 #if defined(CONFIG_ALPHA_GENERIC)
14 ldl $4,alpha_using_srm
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.
21 ldq $1,HWRPB_CRB_OFFSET($0)
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.
37 #if defined(CONFIG_ALPHA_GENERIC)
38 ldl $4,alpha_using_srm
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.
50 #if defined(CONFIG_ALPHA_GENERIC)
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
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)
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