diff options
Diffstat (limited to 'kernel/arch/alpha/lib/callback_srm.S')
| -rw-r--r-- | kernel/arch/alpha/lib/callback_srm.S | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/kernel/arch/alpha/lib/callback_srm.S b/kernel/arch/alpha/lib/callback_srm.S new file mode 100644 index 000000000..8804bec2c --- /dev/null +++ b/kernel/arch/alpha/lib/callback_srm.S @@ -0,0 +1,103 @@ +/* + * 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 + |