/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* arch/alpha/lib/callback_srm.S
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*/
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#include <asm/console.h>
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#include <asm/export.h>
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.text
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#define HWRPB_CRB_OFFSET 0xc0
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#if defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC)
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.align 4
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srm_dispatch:
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#if defined(CONFIG_ALPHA_GENERIC)
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ldl $4,alpha_using_srm
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beq $4,nosrm
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#endif
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ldq $0,hwrpb # gp is set up by CALLBACK macro.
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ldl $25,0($25) # Pick up the wrapper data.
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mov $20,$21 # Shift arguments right.
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mov $19,$20
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ldq $1,HWRPB_CRB_OFFSET($0)
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mov $18,$19
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mov $17,$18
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mov $16,$17
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addq $0,$1,$2 # CRB address
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ldq $27,0($2) # DISPATCH procedure descriptor (VMS call std)
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extwl $25,0,$16 # SRM callback function code
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ldq $3,8($27) # call address
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extwl $25,2,$25 # argument information (VMS calling std)
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jmp ($3) # Return directly to caller of wrapper.
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.align 4
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.globl srm_fixup
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.ent srm_fixup
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srm_fixup:
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ldgp $29,0($27)
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#if defined(CONFIG_ALPHA_GENERIC)
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ldl $4,alpha_using_srm
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beq $4,nosrm
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#endif
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ldq $0,hwrpb
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ldq $1,HWRPB_CRB_OFFSET($0)
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addq $0,$1,$2 # CRB address
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ldq $27,16($2) # VA of FIXUP procedure descriptor
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ldq $3,8($27) # call address
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lda $25,2($31) # two integer arguments
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jmp ($3) # Return directly to caller of srm_fixup.
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.end srm_fixup
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#if defined(CONFIG_ALPHA_GENERIC)
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.align 3
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nosrm:
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lda $0,-1($31)
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ret
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#endif
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#define CALLBACK(NAME, CODE, ARG_CNT) \
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.align 4; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \
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ldgp $29,0($27); br $25,srm_dispatch; .word CODE, ARG_CNT; .end callback_##NAME
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#else /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */
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#define CALLBACK(NAME, CODE, ARG_CNT) \
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.align 3; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \
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lda $0,-1($31); ret; .end callback_##NAME
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.align 3
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.globl srm_fixup
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.ent srm_fixup
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srm_fixup:
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lda $0,-1($31)
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ret
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.end srm_fixup
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#endif /* defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC) */
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CALLBACK(puts, CCB_PUTS, 4)
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CALLBACK(open, CCB_OPEN, 3)
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CALLBACK(close, CCB_CLOSE, 2)
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CALLBACK(read, CCB_READ, 5)
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CALLBACK(open_console, CCB_OPEN_CONSOLE, 1)
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CALLBACK(close_console, CCB_CLOSE_CONSOLE, 1)
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CALLBACK(getenv, CCB_GET_ENV, 4)
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CALLBACK(setenv, CCB_SET_ENV, 4)
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CALLBACK(getc, CCB_GETC, 2)
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CALLBACK(reset_term, CCB_RESET_TERM, 2)
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CALLBACK(term_int, CCB_SET_TERM_INT, 3)
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CALLBACK(term_ctl, CCB_SET_TERM_CTL, 3)
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CALLBACK(process_keycode, CCB_PROCESS_KEYCODE, 3)
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CALLBACK(ioctl, CCB_IOCTL, 6)
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CALLBACK(write, CCB_WRITE, 5)
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CALLBACK(reset_env, CCB_RESET_ENV, 4)
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CALLBACK(save_env, CCB_SAVE_ENV, 1)
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CALLBACK(pswitch, CCB_PSWITCH, 3)
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CALLBACK(bios_emul, CCB_BIOS_EMUL, 5)
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EXPORT_SYMBOL(callback_getenv)
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EXPORT_SYMBOL(callback_setenv)
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EXPORT_SYMBOL(callback_save_env)
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.data
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__alpha_using_srm: # For use by bootpheader
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.long 7 # value is not 1 for link debugging
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.weak alpha_using_srm; alpha_using_srm = __alpha_using_srm
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__callback_init_done: # For use by bootpheader
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.long 7 # value is not 1 for link debugging
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.weak callback_init_done; callback_init_done = __callback_init_done
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