[deliverable/linux.git] / arch / alpha / lib / callback_srm.S

/*
 *	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
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/alpha/lib/callback_srm.S
	3	*/
	4
1da177e4	5	#include <asm/console.h>
00fc0e0d	6	#include <asm/export.h>
1da177e4 LT	7
	8	.text
	9	#define HWRPB_CRB_OFFSET 0xc0
	10
	11	#if defined(CONFIG_ALPHA_SRM) \|\| defined(CONFIG_ALPHA_GENERIC)
	12	.align 4
	13	srm_dispatch:
	14	#if defined(CONFIG_ALPHA_GENERIC)
	15	ldl $4,alpha_using_srm
	16	beq $4,nosrm
	17	#endif
	18	ldq $0,hwrpb # gp is set up by CALLBACK macro.
	19	ldl $25,0($25) # Pick up the wrapper data.
	20	mov $20,$21 # Shift arguments right.
	21	mov $19,$20
	22	ldq $1,HWRPB_CRB_OFFSET($0)
	23	mov $18,$19
	24	mov $17,$18
	25	mov $16,$17
	26	addq $0,$1,$2 # CRB address
	27	ldq $27,0($2) # DISPATCH procedure descriptor (VMS call std)
	28	extwl $25,0,$16 # SRM callback function code
	29	ldq $3,8($27) # call address
	30	extwl $25,2,$25 # argument information (VMS calling std)
	31	jmp ($3) # Return directly to caller of wrapper.
	32
	33	.align 4
	34	.globl srm_fixup
	35	.ent srm_fixup
	36	srm_fixup:
	37	ldgp $29,0($27)
	38	#if defined(CONFIG_ALPHA_GENERIC)
	39	ldl $4,alpha_using_srm
	40	beq $4,nosrm
	41	#endif
	42	ldq $0,hwrpb
	43	ldq $1,HWRPB_CRB_OFFSET($0)
	44	addq $0,$1,$2 # CRB address
	45	ldq $27,16($2) # VA of FIXUP procedure descriptor
	46	ldq $3,8($27) # call address
	47	lda $25,2($31) # two integer arguments
	48	jmp ($3) # Return directly to caller of srm_fixup.
	49	.end srm_fixup
	50
	51	#if defined(CONFIG_ALPHA_GENERIC)
	52	.align 3
	53	nosrm:
	54	lda $0,-1($31)
	55	ret
	56	#endif
	57
	58	#define CALLBACK(NAME, CODE, ARG_CNT) \
	59	.align 4; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \
	60	ldgp $29,0($27); br $25,srm_dispatch; .word CODE, ARG_CNT; .end callback_##NAME
	61
	62	#else /* defined(CONFIG_ALPHA_SRM) \|\| defined(CONFIG_ALPHA_GENERIC) */
	63
	64	#define CALLBACK(NAME, CODE, ARG_CNT) \
	65	.align 3; .globl callback_##NAME; .ent callback_##NAME; callback_##NAME##: \
	66	lda $0,-1($31); ret; .end callback_##NAME
	67
	68	.align 3
	69	.globl srm_fixup
	70	.ent srm_fixup
71	srm_fixup:
72	lda $0,-1($31)
73	ret
74	.end srm_fixup
75	#endif /* defined(CONFIG_ALPHA_SRM) \|\| defined(CONFIG_ALPHA_GENERIC) */
76
77	CALLBACK(puts, CCB_PUTS, 4)
78	CALLBACK(open, CCB_OPEN, 3)
79	CALLBACK(close, CCB_CLOSE, 2)
80	CALLBACK(read, CCB_READ, 5)
81	CALLBACK(open_console, CCB_OPEN_CONSOLE, 1)
82	CALLBACK(close_console, CCB_CLOSE_CONSOLE, 1)
83	CALLBACK(getenv, CCB_GET_ENV, 4)
84	CALLBACK(setenv, CCB_SET_ENV, 4)
85	CALLBACK(getc, CCB_GETC, 2)
86	CALLBACK(reset_term, CCB_RESET_TERM, 2)
87	CALLBACK(term_int, CCB_SET_TERM_INT, 3)
88	CALLBACK(term_ctl, CCB_SET_TERM_CTL, 3)
89	CALLBACK(process_keycode, CCB_PROCESS_KEYCODE, 3)
90	CALLBACK(ioctl, CCB_IOCTL, 6)
91	CALLBACK(write, CCB_WRITE, 5)
92	CALLBACK(reset_env, CCB_RESET_ENV, 4)
93	CALLBACK(save_env, CCB_SAVE_ENV, 1)
94	CALLBACK(pswitch, CCB_PSWITCH, 3)
95	CALLBACK(bios_emul, CCB_BIOS_EMUL, 5)
00fc0e0d AV	96
	97	EXPORT_SYMBOL(callback_getenv)
	98	EXPORT_SYMBOL(callback_setenv)
	99	EXPORT_SYMBOL(callback_save_env)
1da177e4 LT	100
	101	.data
	102	__alpha_using_srm: # For use by bootpheader
	103	.long 7 # value is not 1 for link debugging
	104	.weak alpha_using_srm; alpha_using_srm = __alpha_using_srm
	105	__callback_init_done: # For use by bootpheader
	106	.long 7 # value is not 1 for link debugging
	107	.weak callback_init_done; callback_init_done = __callback_init_done
	108