2 * arch/alpha/lib/callback_srm.S
5 #include <linux/config.h>
6 #include <asm/console.h>
9 #define HWRPB_CRB_OFFSET 0xc0
11 #if defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC)
14 #if defined(CONFIG_ALPHA_GENERIC)
15 ldl $4,alpha_using_srm
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.
22 ldq $1,HWRPB_CRB_OFFSET($0)
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.
38 #if defined(CONFIG_ALPHA_GENERIC)
39 ldl $4,alpha_using_srm
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.
51 #if defined(CONFIG_ALPHA_GENERIC)
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
62 #else /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */
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
75 #endif /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */
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)
98 __alpha_using_srm: # For use by bootpheader
99 .long 7 # value is not 1 for link debugging
100 .weak alpha_using_srm; alpha_using_srm = __alpha_using_srm
101 __callback_init_done: # For use by bootpheader
102 .long 7 # value is not 1 for link debugging
103 .weak callback_init_done; callback_init_done = __callback_init_done