source: mainline/kernel/arch/ppc32/src/asm.S@ a35b458

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since a35b458 was a35b458, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 8 years ago

style: Remove trailing whitespace on _all_ lines, including empty ones, for particular file types.

Command used: tools/srepl '\s\+$' '' -- *.c *.h *.py *.sh *.s *.S *.ag

Currently, whitespace on empty lines is very inconsistent.
There are two basic choices: Either remove the whitespace, or keep empty lines
indented to the level of surrounding code. The former is AFAICT more common,
and also much easier to do automatically.

Alternatively, we could write script for automatic indentation, and use that
instead. However, if such a script exists, it's possible to use the indented
style locally, by having the editor apply relevant conversions on load/save,
without affecting remote repository. IMO, it makes more sense to adopt
the simpler rule.
  • Property mode set to 100644
File size: 5.6 KB
Line 
1/*
2 * Copyright (c) 2005 Martin 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
29#include <abi/asmtool.h>
30#include <arch/asm/regname.h>
31#include <arch/msr.h>
32#include <arch/istate_struct.h>
33
34.text
35
36FUNCTION_BEGIN(userspace_asm)
37 /*
38 * r3 = uspace_uarg
39 * r4 = stack
40 * r5 = entry
41 */
42
43 /* Disable interrupts */
44
45 mfmsr r31
46 rlwinm r31, r31, 0, 17, 15
47 mtmsr r31
48 isync
49
50 /* Set entry point */
51
52 mtsrr0 r5
53
54 /* Set privileged state, enable interrupts */
55
56 ori r31, r31, MSR_PR
57 ori r31, r31, MSR_EE
58 mtsrr1 r31
59
60 /* Set stack */
61
62 mr sp, r4
63
64 /* %r6 is defined to hold pcb_ptr - set it to 0 */
65
66 xor r6, r6, r6
67
68 /* Jump to userspace */
69
70 rfi
71FUNCTION_END(userspace_asm)
72
73SYMBOL(iret)
74 /* Disable interrupts */
75
76 mfmsr r31
77 rlwinm r31, r31, 0, 17, 15
78 mtmsr r31
79 isync
80
81 lwz r0, ISTATE_OFFSET_R0(sp)
82 lwz r2, ISTATE_OFFSET_R2(sp)
83 lwz r3, ISTATE_OFFSET_R3(sp)
84 lwz r4, ISTATE_OFFSET_R4(sp)
85 lwz r5, ISTATE_OFFSET_R5(sp)
86 lwz r6, ISTATE_OFFSET_R6(sp)
87 lwz r7, ISTATE_OFFSET_R7(sp)
88 lwz r8, ISTATE_OFFSET_R8(sp)
89 lwz r9, ISTATE_OFFSET_R9(sp)
90 lwz r10, ISTATE_OFFSET_R10(sp)
91 lwz r11, ISTATE_OFFSET_R11(sp)
92 lwz r13, ISTATE_OFFSET_R13(sp)
93 lwz r14, ISTATE_OFFSET_R14(sp)
94 lwz r15, ISTATE_OFFSET_R15(sp)
95 lwz r16, ISTATE_OFFSET_R16(sp)
96 lwz r17, ISTATE_OFFSET_R17(sp)
97 lwz r18, ISTATE_OFFSET_R18(sp)
98 lwz r19, ISTATE_OFFSET_R19(sp)
99 lwz r20, ISTATE_OFFSET_R20(sp)
100 lwz r21, ISTATE_OFFSET_R21(sp)
101 lwz r22, ISTATE_OFFSET_R22(sp)
102 lwz r23, ISTATE_OFFSET_R23(sp)
103 lwz r24, ISTATE_OFFSET_R24(sp)
104 lwz r25, ISTATE_OFFSET_R25(sp)
105 lwz r26, ISTATE_OFFSET_R26(sp)
106 lwz r27, ISTATE_OFFSET_R27(sp)
107 lwz r28, ISTATE_OFFSET_R28(sp)
108 lwz r29, ISTATE_OFFSET_R29(sp)
109 lwz r30, ISTATE_OFFSET_R30(sp)
110 lwz r31, ISTATE_OFFSET_R31(sp)
111
112 lwz r12, ISTATE_OFFSET_CR(sp)
113 mtcr r12
114
115 lwz r12, ISTATE_OFFSET_PC(sp)
116 mtsrr0 r12
117
118 lwz r12, ISTATE_OFFSET_SRR1(sp)
119 mtsrr1 r12
120
121 lwz r12, ISTATE_OFFSET_LR(sp)
122 mtlr r12
123
124 lwz r12, ISTATE_OFFSET_CTR(sp)
125 mtctr r12
126
127 lwz r12, ISTATE_OFFSET_XER(sp)
128 mtxer r12
129
130 lwz r12, ISTATE_OFFSET_R12(sp)
131 lwz sp, ISTATE_OFFSET_SP(sp)
132
133 rfi
134
135SYMBOL(iret_syscall)
136 /* Disable interrupts */
137
138 mfmsr r31
139 rlwinm r31, r31, 0, 17, 15
140 mtmsr r31
141 isync
142
143 lwz r0, ISTATE_OFFSET_R0(sp)
144 lwz r2, ISTATE_OFFSET_R2(sp)
145 lwz r4, ISTATE_OFFSET_R4(sp)
146 lwz r5, ISTATE_OFFSET_R5(sp)
147 lwz r6, ISTATE_OFFSET_R6(sp)
148 lwz r7, ISTATE_OFFSET_R7(sp)
149 lwz r8, ISTATE_OFFSET_R8(sp)
150 lwz r9, ISTATE_OFFSET_R9(sp)
151 lwz r10, ISTATE_OFFSET_R10(sp)
152 lwz r11, ISTATE_OFFSET_R11(sp)
153 lwz r13, ISTATE_OFFSET_R13(sp)
154 lwz r14, ISTATE_OFFSET_R14(sp)
155 lwz r15, ISTATE_OFFSET_R15(sp)
156 lwz r16, ISTATE_OFFSET_R16(sp)
157 lwz r17, ISTATE_OFFSET_R17(sp)
158 lwz r18, ISTATE_OFFSET_R18(sp)
159 lwz r19, ISTATE_OFFSET_R19(sp)
160 lwz r20, ISTATE_OFFSET_R20(sp)
161 lwz r21, ISTATE_OFFSET_R21(sp)
162 lwz r22, ISTATE_OFFSET_R22(sp)
163 lwz r23, ISTATE_OFFSET_R23(sp)
164 lwz r24, ISTATE_OFFSET_R24(sp)
165 lwz r25, ISTATE_OFFSET_R25(sp)
166 lwz r26, ISTATE_OFFSET_R26(sp)
167 lwz r27, ISTATE_OFFSET_R27(sp)
168 lwz r28, ISTATE_OFFSET_R28(sp)
169 lwz r29, ISTATE_OFFSET_R29(sp)
170 lwz r30, ISTATE_OFFSET_R30(sp)
171 lwz r31, ISTATE_OFFSET_R31(sp)
172
173 lwz r12, ISTATE_OFFSET_CR(sp)
174 mtcr r12
175
176 lwz r12, ISTATE_OFFSET_PC(sp)
177 mtsrr0 r12
178
179 lwz r12, ISTATE_OFFSET_SRR1(sp)
180 mtsrr1 r12
181
182 lwz r12, ISTATE_OFFSET_LR(sp)
183 mtlr r12
184
185 lwz r12, ISTATE_OFFSET_CTR(sp)
186 mtctr r12
187
188 lwz r12, ISTATE_OFFSET_XER(sp)
189 mtxer r12
190
191 lwz r12, ISTATE_OFFSET_R12(sp)
192 lwz sp, ISTATE_OFFSET_SP(sp)
193
194 rfi
195
196FUNCTION_BEGIN(memcpy_from_uspace)
197FUNCTION_BEGIN(memcpy_to_uspace)
198 srwi. r7, r5, 3
199 addi r6, r3, -4
200 addi r4, r4, -4
201 beq 2f
202
203 andi. r0, r6, 3
204 mtctr r7
205 bne 5f
206
207 1:
208
209 lwz r7, 4(r4)
210 lwzu r8, 8(r4)
211 stw r7, 4(r6)
212 stwu r8, 8(r6)
213 bdnz 1b
214
215 andi. r5, r5, 7
216
217 2:
218
219 cmplwi 0, r5, 4
220 blt 3f
221
222 lwzu r0, 4(r4)
223 addi r5, r5, -4
224 stwu r0, 4(r6)
225
226 3:
227
228 cmpwi 0, r5, 0
229 beqlr
230 mtctr r5
231 addi r4, r4, 3
232 addi r6, r6, 3
233
234 4:
235
236 lbzu r0, 1(r4)
237 stbu r0, 1(r6)
238 bdnz 4b
239 blr
240
241 5:
242
243 subfic r0, r0, 4
244 mtctr r0
245
246 6:
247
248 lbz r7, 4(r4)
249 addi r4, r4, 1
250 stb r7, 4(r6)
251 addi r6, r6, 1
252 bdnz 6b
253 subf r5, r0, r5
254 rlwinm. r7, r5, 32-3, 3, 31
255 beq 2b
256 mtctr r7
257 b 1b
258FUNCTION_END(memcpy_from_uspace)
259FUNCTION_END(memcpy_to_uspace)
260
261SYMBOL(memcpy_from_uspace_failover_address)
262SYMBOL(memcpy_to_uspace_failover_address)
263 /* Return zero, failure */
264 xor r3, r3, r3
265 blr
266
267FUNCTION_BEGIN(early_putchar)
268 blr
269FUNCTION_END(early_putchar)
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