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review.evervolv.com / android_kernel_htc_msm8960 / 7febe2be36035e5c75128e8cc3baeb1f30fa2bc4 / . / arch / sparc / kernel / trampoline_32.S
blob: 691f484e03b3c6440af2c44543a5113340ad8283 [file] [log] [blame]
Adrian Bunk88278ca2008-05-19 16:53:02 -0700[diff] [blame]1/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2 * trampoline.S: SMP cpu boot-up trampoline code.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 */
7
8#include <linux/init.h>
9#include <asm/head.h>
10#include <asm/psr.h>
11#include <asm/page.h>
12#include <asm/asi.h>
13#include <asm/ptrace.h>
14#include <asm/vaddrs.h>
15#include <asm/contregs.h>
16#include <asm/thread_info.h>
17
Konrad Eisele84017072009-08-31 22:08:13 +0000[diff] [blame]18 .globl sun4m_cpu_startup, __smp4m_processor_id, __leon_processor_id
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]19 .globl sun4d_cpu_startup, __smp4d_processor_id
20
Al Viro409832f2008-11-22 17:33:54 +0000[diff] [blame]21 __CPUINIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]22 .align 4
23
24/* When we start up a cpu for the first time it enters this routine.
25 * This initializes the chip from whatever state the prom left it
26 * in and sets PIL in %psr to 15, no irqs.
27 */
28
29sun4m_cpu_startup:
30cpu1_startup:
31 sethi %hi(trapbase_cpu1), %g3
32 b 1f
33 or %g3, %lo(trapbase_cpu1), %g3
34
35cpu2_startup:
36 sethi %hi(trapbase_cpu2), %g3
37 b 1f
38 or %g3, %lo(trapbase_cpu2), %g3
39
40cpu3_startup:
41 sethi %hi(trapbase_cpu3), %g3
42 b 1f
43 or %g3, %lo(trapbase_cpu3), %g3
44
451:
46 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
47 set (PSR_PIL | PSR_S | PSR_PS), %g1
48 wr %g1, 0x0, %psr ! traps off though
49 WRITE_PAUSE
50
51 /* Our %wim is one behind CWP */
52 mov 2, %g1
53 wr %g1, 0x0, %wim
54 WRITE_PAUSE
55
56 /* This identifies "this cpu". */
57 wr %g3, 0x0, %tbr
58 WRITE_PAUSE
59
60 /* Give ourselves a stack and curptr. */
61 set current_set, %g5
62 srl %g3, 10, %g4
63 and %g4, 0xc, %g4
64 ld [%g5 + %g4], %g6
65
66 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
67 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
68 add %g6, %sp, %sp
69
70 /* Turn on traps (PSR_ET). */
71 rd %psr, %g1
72 wr %g1, PSR_ET, %psr ! traps on
73 WRITE_PAUSE
74
75 /* Init our caches, etc. */
76 set poke_srmmu, %g5
77 ld [%g5], %g5
78 call %g5
79 nop
80
81 /* Start this processor. */
82 call smp4m_callin
83 nop
84
85 b,a smp_do_cpu_idle
86
87 .text
88 .align 4
89
90smp_do_cpu_idle:
91 call cpu_idle
92 mov 0, %o0
93
94 call cpu_panic
95 nop
96
97__smp4m_processor_id:
98 rd %tbr, %g2
99 srl %g2, 12, %g2
100 and %g2, 3, %g2
101 retl
102 mov %g1, %o7
103
104__smp4d_processor_id:
105 lda [%g0] ASI_M_VIKING_TMP1, %g2
106 retl
107 mov %g1, %o7
108
Konrad Eisele84017072009-08-31 22:08:13 +0000[diff] [blame]109__leon_processor_id:
110 rd %asr17,%g2
111 srl %g2,28,%g2
112 retl
113 mov %g1, %o7
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]115/* CPUID in bootbus can be found at PA 0xff0140000 */
116#define SUN4D_BOOTBUS_CPUID 0xf0140000
117
Al Viro409832f2008-11-22 17:33:54 +0000[diff] [blame]118 __CPUINIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]119 .align 4
120
121sun4d_cpu_startup:
122 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
123 set (PSR_PIL | PSR_S | PSR_PS), %g1
124 wr %g1, 0x0, %psr ! traps off though
125 WRITE_PAUSE
126
127 /* Our %wim is one behind CWP */
128 mov 2, %g1
129 wr %g1, 0x0, %wim
130 WRITE_PAUSE
131
132 /* Set tbr - we use just one trap table. */
133 set trapbase, %g1
134 wr %g1, 0x0, %tbr
135 WRITE_PAUSE
136
137 /* Get our CPU id out of bootbus */
138 set SUN4D_BOOTBUS_CPUID, %g3
139 lduba [%g3] ASI_M_CTL, %g3
140 and %g3, 0xf8, %g3
141 srl %g3, 3, %g1
142 sta %g1, [%g0] ASI_M_VIKING_TMP1
143
144 /* Give ourselves a stack and curptr. */
145 set current_set, %g5
146 srl %g3, 1, %g4
147 ld [%g5 + %g4], %g6
148
149 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
150 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
151 add %g6, %sp, %sp
152
153 /* Turn on traps (PSR_ET). */
154 rd %psr, %g1
155 wr %g1, PSR_ET, %psr ! traps on
156 WRITE_PAUSE
157
158 /* Init our caches, etc. */
159 set poke_srmmu, %g5
160 ld [%g5], %g5
161 call %g5
162 nop
163
164 /* Start this processor. */
165 call smp4d_callin
166 nop
167
168 b,a smp_do_cpu_idle
Konrad Eisele84017072009-08-31 22:08:13 +0000[diff] [blame]169
170#ifdef CONFIG_SPARC_LEON
171
172 __CPUINIT
173 .align 4
174 .global leon_smp_cpu_startup, smp_penguin_ctable
175
176leon_smp_cpu_startup:
177
178 set smp_penguin_ctable,%g1
179 ld [%g1+4],%g1
180 srl %g1,4,%g1
181 set 0x00000100,%g5 /* SRMMU_CTXTBL_PTR */
182 sta %g1, [%g5] ASI_M_MMUREGS
183
184 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
185 set (PSR_PIL | PSR_S | PSR_PS), %g1
186 wr %g1, 0x0, %psr ! traps off though
187 WRITE_PAUSE
188
189 /* Our %wim is one behind CWP */
190 mov 2, %g1
191 wr %g1, 0x0, %wim
192 WRITE_PAUSE
193
194 /* Set tbr - we use just one trap table. */
195 set trapbase, %g1
196 wr %g1, 0x0, %tbr
197 WRITE_PAUSE
198
199 /* Get our CPU id */
200 rd %asr17,%g3
201
202 /* Give ourselves a stack and curptr. */
203 set current_set, %g5
204 srl %g3, 28, %g4
205 sll %g4, 2, %g4
206 ld [%g5 + %g4], %g6
207
208 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
209 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
210 add %g6, %sp, %sp
211
212 /* Turn on traps (PSR_ET). */
213 rd %psr, %g1
214 wr %g1, PSR_ET, %psr ! traps on
215 WRITE_PAUSE
216
217 /* Init our caches, etc. */
218 set poke_srmmu, %g5
219 ld [%g5], %g5
220 call %g5
221 nop
222
223 /* Start this processor. */
224 call leon_callin
225 nop
226
227 b,a smp_do_cpu_idle
228
229#endif