/* * arch/alpha/lib/callback_srm.S */ #include <asm/console.h> .text #define HWRPB_CRB_OFFSET 0xc0 #if defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) .align 4 srm_dispatch: #if defined(CONFIG_ALPHA_GENERIC) ldl $4,alpha_using_srm beq $4,nosrm #endif ldq $0,hwrpb # gp is set up by CALLBACK macro. ldl $25,0($25) # Pick up the wrapper data. mov $20,$21 # Shift arguments right. mov $19,$20 ldq $1,HWRPB_CRB_OFFSET($0) mov $18,$19 mov $17,$18 mov $16,$17 addq $0,$1,$2 # CRB address ldq $27,0($2) # DISPATCH procedure descriptor (VMS call std) extwl $25,0,$16 # SRM callback function code ldq $3,8($27) # call address extwl $25,2,$25 # argument information (VMS calling std) jmp ($3) # Return directly to caller of wrapper. .align 4 .globl srm_fixup .ent srm_fixup srm_fixup: ldgp $29,0($27) #if defined(CONFIG_ALPHA_GENERIC) ldl $4,alpha_using_srm beq $4,nosrm #endif ldq $0,hwrpb ldq $1,HWRPB_CRB_OFFSET($0) addq $0,$1,$2 # CRB address ldq $27,16($2) # VA of FIXUP procedure descriptor ldq $3,8($27) # call address lda $25,2($31) # two integer arguments jmp ($3) # Return directly to caller of srm_fixup. .end srm_fixup #if defined(CONFIG_ALPHA_GENERIC) .align 3 nosrm: lda $0,-1($31) ret #endif #define CALLBACK(NAME, CODE, ARG_CNT) \ .align 4; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \ ldgp $29,0($27); br $25,srm_dispatch; .word CODE, ARG_CNT; .end callback_##NAME #else /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */ #define CALLBACK(NAME, CODE, ARG_CNT) \ .align 3; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \ lda $0,-1($31); ret; .end callback_##NAME .align 3 .globl srm_fixup .ent srm_fixup srm_fixup: lda $0,-1($31) ret .end srm_fixup #endif /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */ CALLBACK(puts, CCB_PUTS, 4) CALLBACK(open, CCB_OPEN, 3) CALLBACK(close, CCB_CLOSE, 2) CALLBACK(read, CCB_READ, 5) CALLBACK(open_console, CCB_OPEN_CONSOLE, 1) CALLBACK(close_console, CCB_CLOSE_CONSOLE, 1) CALLBACK(getenv, CCB_GET_ENV, 4) CALLBACK(setenv, CCB_SET_ENV, 4) CALLBACK(getc, CCB_GETC, 2) CALLBACK(reset_term, CCB_RESET_TERM, 2) CALLBACK(term_int, CCB_SET_TERM_INT, 3) CALLBACK(term_ctl, CCB_SET_TERM_CTL, 3) CALLBACK(process_keycode, CCB_PROCESS_KEYCODE, 3) CALLBACK(ioctl, CCB_IOCTL, 6) CALLBACK(write, CCB_WRITE, 5) CALLBACK(reset_env, CCB_RESET_ENV, 4) CALLBACK(save_env, CCB_SAVE_ENV, 1) CALLBACK(pswitch, CCB_PSWITCH, 3) CALLBACK(bios_emul, CCB_BIOS_EMUL, 5) .data __alpha_using_srm: # For use by bootpheader .long 7 # value is not 1 for link debugging .weak alpha_using_srm; alpha_using_srm = __alpha_using_srm __callback_init_done: # For use by bootpheader .long 7 # value is not 1 for link debugging .weak callback_init_done; callback_init_done = __callback_init_done