WebSVN – HelenOS – Blame – /trunk/kernel/arch/ppc32/src/asm.S

Rev	Author	Line No.	Line
162	decky	1	#
2071	jermar	2	# Copyright (c) 2005 Martin Decky
162	decky	3	# All rights reserved.
		4	#
		5	# Redistribution and use in source and binary forms, with or without
		6	# modification, are permitted provided that the following conditions
		7	# are met:
		8	#
		9	# - Redistributions of source code must retain the above copyright
		10	# notice, this list of conditions and the following disclaimer.
		11	# - Redistributions in binary form must reproduce the above copyright
		12	# notice, this list of conditions and the following disclaimer in the
		13	# documentation and/or other materials provided with the distribution.
		14	# - The name of the author may not be used to endorse or promote products
		15	# derived from this software without specific prior written permission.
		16	#
		17	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	#
		28
845	decky	29	#include <arch/asm/regname.h>
191	decky	30
162	decky	31	.text
		32
1220	decky	33	.global userspace_asm
1004	decky	34	.global iret
1277	decky	35	.global iret_syscall
210	decky	36	.global memsetb
		37	.global memcpy
1288	jermar	38	.global memcpy_from_uspace
		39	.global memcpy_to_uspace
		40	.global memcpy_from_uspace_failover_address
		41	.global memcpy_to_uspace_failover_address
185	decky	42
1220	decky	43	userspace_asm:
		44
		45	# r3 = uspace_uarg
		46	# r4 = stack
1267	decky	47	# r5 = entry
		48
		49	# disable interrupts
1220	decky	50
		51	mfmsr r31
		52	rlwinm r31, r31, 0, 17, 15
		53	mtmsr r31
		54
		55	# set entry point
		56
		57	mtsrr0 r5
		58
		59	# set problem state, enable interrupts
		60
1267	decky	61	ori r31, r31, msr_pr
		62	ori r31, r31, msr_ee
1220	decky	63	mtsrr1 r31
		64
		65	# set stack
		66
		67	mr sp, r4
		68
		69	# jump to userspace
		70
		71	rfi
		72
1004	decky	73	iret:
1277	decky	74
		75	# disable interrupts
		76
		77	mfmsr r31
		78	rlwinm r31, r31, 0, 17, 15
		79	mtmsr r31
		80
1355	decky	81	lwz r0, 8(sp)
		82	lwz r2, 12(sp)
		83	lwz r3, 16(sp)
		84	lwz r4, 20(sp)
		85	lwz r5, 24(sp)
		86	lwz r6, 28(sp)
		87	lwz r7, 32(sp)
		88	lwz r8, 36(sp)
		89	lwz r9, 40(sp)
		90	lwz r10, 44(sp)
		91	lwz r11, 48(sp)
		92	lwz r13, 52(sp)
		93	lwz r14, 56(sp)
		94	lwz r15, 60(sp)
		95	lwz r16, 64(sp)
		96	lwz r17, 68(sp)
		97	lwz r18, 72(sp)
		98	lwz r19, 76(sp)
		99	lwz r20, 80(sp)
		100	lwz r21, 84(sp)
		101	lwz r22, 88(sp)
		102	lwz r23, 92(sp)
		103	lwz r24, 96(sp)
		104	lwz r25, 100(sp)
		105	lwz r26, 104(sp)
		106	lwz r27, 108(sp)
		107	lwz r28, 112(sp)
		108	lwz r29, 116(sp)
		109	lwz r30, 120(sp)
		110	lwz r31, 124(sp)
1004	decky	111
1355	decky	112	lwz r12, 128(sp)
1277	decky	113	mtcr r12
		114
1355	decky	115	lwz r12, 132(sp)
1267	decky	116	mtsrr0 r12
1004	decky	117
1355	decky	118	lwz r12, 136(sp)
1267	decky	119	mtsrr1 r12
		120
1355	decky	121	lwz r12, 140(sp)
1267	decky	122	mtlr r12
		123
1355	decky	124	lwz r12, 144(sp)
1277	decky	125	mtctr r12
		126
1355	decky	127	lwz r12, 148(sp)
1277	decky	128	mtxer r12
		129
1355	decky	130	lwz r12, 152(sp)
		131	lwz sp, 156(sp)
1277	decky	132
		133	rfi
		134
		135	iret_syscall:
		136
1384	decky	137	# reset decrementer
		138
		139	li r31, 1000
		140	mtdec r31
		141
1277	decky	142	# disable interrupts
		143
		144	mfmsr r31
		145	rlwinm r31, r31, 0, 17, 15
		146	mtmsr r31
		147
1355	decky	148	lwz r0, 8(sp)
		149	lwz r2, 12(sp)
		150	lwz r4, 20(sp)
		151	lwz r5, 24(sp)
		152	lwz r6, 28(sp)
		153	lwz r7, 32(sp)
		154	lwz r8, 36(sp)
		155	lwz r9, 40(sp)
		156	lwz r10, 44(sp)
		157	lwz r11, 48(sp)
		158	lwz r13, 52(sp)
		159	lwz r14, 56(sp)
		160	lwz r15, 60(sp)
		161	lwz r16, 64(sp)
		162	lwz r17, 68(sp)
		163	lwz r18, 72(sp)
		164	lwz r19, 76(sp)
		165	lwz r20, 80(sp)
		166	lwz r21, 84(sp)
		167	lwz r22, 88(sp)
		168	lwz r23, 92(sp)
		169	lwz r24, 96(sp)
		170	lwz r25, 100(sp)
		171	lwz r26, 104(sp)
		172	lwz r27, 108(sp)
		173	lwz r28, 112(sp)
		174	lwz r29, 116(sp)
		175	lwz r30, 120(sp)
		176	lwz r31, 124(sp)
1277	decky	177
1355	decky	178	lwz r12, 128(sp)
1267	decky	179	mtcr r12
		180
1355	decky	181	lwz r12, 132(sp)
1277	decky	182	mtsrr0 r12
		183
1355	decky	184	lwz r12, 136(sp)
1277	decky	185	mtsrr1 r12
		186
1355	decky	187	lwz r12, 140(sp)
1277	decky	188	mtlr r12
		189
1355	decky	190	lwz r12, 144(sp)
1267	decky	191	mtctr r12
		192
1355	decky	193	lwz r12, 148(sp)
1267	decky	194	mtxer r12
1277	decky	195
1355	decky	196	lwz r12, 152(sp)
		197	lwz sp, 156(sp)
1267	decky	198
1004	decky	199	rfi
		200
210	decky	201	memsetb:
		202	rlwimi r5, r5, 8, 16, 23
		203	rlwimi r5, r5, 16, 0, 15
		204
		205	addi r14, r3, -4
		206
		207	cmplwi 0, r4, 4
		208	blt 7f
		209
		210	stwu r5, 4(r14)
		211	beqlr
		212
		213	andi. r15, r14, 3
		214	add r4, r15, r4
		215	subf r14, r15, r14
		216	srwi r15, r4, 2
		217	mtctr r15
		218
		219	bdz 6f
		220
		221	1:
		222	stwu r5, 4(r14)
		223	bdnz 1b
		224
		225	6:
		226
		227	andi. r4, r4, 3
		228
		229	7:
		230
		231	cmpwi 0, r4, 0
		232	beqlr
		233
		234	mtctr r4
		235	addi r6, r6, 3
		236
		237	8:
		238
		239	stbu r5, 1(r14)
		240	bdnz 8b
		241
		242	blr
		243
		244	memcpy:
1288	jermar	245	memcpy_from_uspace:
		246	memcpy_to_uspace:
		247
860	decky	248	srwi. r7, r5, 3
		249	addi r6, r3, -4
		250	addi r4, r4, -4
		251	beq 2f
		252
		253	andi. r0, r6, 3
		254	mtctr r7
		255	bne 5f
		256
		257	1:
		258
		259	lwz r7, 4(r4)
		260	lwzu r8, 8(r4)
		261	stw r7, 4(r6)
		262	stwu r8, 8(r6)
		263	bdnz 1b
		264
		265	andi. r5, r5, 7
		266
		267	2:
		268
		269	cmplwi 0, r5, 4
		270	blt 3f
		271
		272	lwzu r0, 4(r4)
		273	addi r5, r5, -4
		274	stwu r0, 4(r6)
		275
		276	3:
		277
		278	cmpwi 0, r5, 0
		279	beqlr
		280	mtctr r5
		281	addi r4, r4, 3
		282	addi r6, r6, 3
		283
		284	4:
		285
		286	lbzu r0, 1(r4)
		287	stbu r0, 1(r6)
		288	bdnz 4b
210	decky	289	blr
860	decky	290
		291	5:
		292
		293	subfic r0, r0, 4
		294	mtctr r0
		295
		296	6:
		297
		298	lbz r7, 4(r4)
		299	addi r4, r4, 1
		300	stb r7, 4(r6)
		301	addi r6, r6, 1
		302	bdnz 6b
		303	subf r5, r0, r5
		304	rlwinm. r7, r5, 32-3, 3, 31
		305	beq 2b
		306	mtctr r7
		307	b 1b
1288	jermar	308
		309	memcpy_from_uspace_failover_address:
		310	memcpy_to_uspace_failover_address:
		311	b memcpy_from_uspace_failover_address

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