110 lines
2.9 KiB
ArmAsm
110 lines
2.9 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* arch/alpha/lib/callback_srm.S
|
|
*/
|
|
|
|
#include <asm/console.h>
|
|
#include <asm/export.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)
|
|
|
|
EXPORT_SYMBOL(callback_getenv)
|
|
EXPORT_SYMBOL(callback_setenv)
|
|
EXPORT_SYMBOL(callback_save_env)
|
|
|
|
.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
|
|
|