/* SPDX-License-Identifier: GPL-2.0 *//* *	arch/alpha/lib/callback_srm.S */ #include <linux/export.h>#include <asm/console.h> .text#define HWRPB_CRB_OFFSET 0xc0 #if defined(CONFIG_ALPHA_SRM) || defined(CONFIG_ALPHA_GENERIC).align 4srm_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_fixupsrm_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 3nosrm:	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_fixupsrm_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