Loading...
1/*
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 <asm/head.h>
9#include <asm/psr.h>
10#include <asm/page.h>
11#include <asm/asi.h>
12#include <asm/ptrace.h>
13#include <asm/vaddrs.h>
14#include <asm/contregs.h>
15#include <asm/thread_info.h>
16
17 .globl sun4m_cpu_startup
18 .globl sun4d_cpu_startup
19
20 .align 4
21
22/* When we start up a cpu for the first time it enters this routine.
23 * This initializes the chip from whatever state the prom left it
24 * in and sets PIL in %psr to 15, no irqs.
25 */
26
27sun4m_cpu_startup:
28cpu1_startup:
29 sethi %hi(trapbase_cpu1), %g3
30 b 1f
31 or %g3, %lo(trapbase_cpu1), %g3
32
33cpu2_startup:
34 sethi %hi(trapbase_cpu2), %g3
35 b 1f
36 or %g3, %lo(trapbase_cpu2), %g3
37
38cpu3_startup:
39 sethi %hi(trapbase_cpu3), %g3
40 b 1f
41 or %g3, %lo(trapbase_cpu3), %g3
42
431:
44 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
45 set (PSR_PIL | PSR_S | PSR_PS), %g1
46 wr %g1, 0x0, %psr ! traps off though
47 WRITE_PAUSE
48
49 /* Our %wim is one behind CWP */
50 mov 2, %g1
51 wr %g1, 0x0, %wim
52 WRITE_PAUSE
53
54 /* This identifies "this cpu". */
55 wr %g3, 0x0, %tbr
56 WRITE_PAUSE
57
58 /* Give ourselves a stack and curptr. */
59 set current_set, %g5
60 srl %g3, 10, %g4
61 and %g4, 0xc, %g4
62 ld [%g5 + %g4], %g6
63
64 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
65 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
66 add %g6, %sp, %sp
67
68 /* Turn on traps (PSR_ET). */
69 rd %psr, %g1
70 wr %g1, PSR_ET, %psr ! traps on
71 WRITE_PAUSE
72
73 /* Init our caches, etc. */
74 set poke_srmmu, %g5
75 ld [%g5], %g5
76 call %g5
77 nop
78
79 /* Start this processor. */
80 call smp_callin
81 nop
82
83 b,a smp_panic
84
85 .text
86 .align 4
87
88smp_panic:
89 call cpu_panic
90 nop
91
92/* CPUID in bootbus can be found at PA 0xff0140000 */
93#define SUN4D_BOOTBUS_CPUID 0xf0140000
94
95 .align 4
96
97sun4d_cpu_startup:
98 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
99 set (PSR_PIL | PSR_S | PSR_PS), %g1
100 wr %g1, 0x0, %psr ! traps off though
101 WRITE_PAUSE
102
103 /* Our %wim is one behind CWP */
104 mov 2, %g1
105 wr %g1, 0x0, %wim
106 WRITE_PAUSE
107
108 /* Set tbr - we use just one trap table. */
109 set trapbase, %g1
110 wr %g1, 0x0, %tbr
111 WRITE_PAUSE
112
113 /* Get our CPU id out of bootbus */
114 set SUN4D_BOOTBUS_CPUID, %g3
115 lduba [%g3] ASI_M_CTL, %g3
116 and %g3, 0xf8, %g3
117 srl %g3, 3, %g1
118 sta %g1, [%g0] ASI_M_VIKING_TMP1
119
120 /* Give ourselves a stack and curptr. */
121 set current_set, %g5
122 srl %g3, 1, %g4
123 ld [%g5 + %g4], %g6
124
125 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
126 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
127 add %g6, %sp, %sp
128
129 /* Turn on traps (PSR_ET). */
130 rd %psr, %g1
131 wr %g1, PSR_ET, %psr ! traps on
132 WRITE_PAUSE
133
134 /* Init our caches, etc. */
135 set poke_srmmu, %g5
136 ld [%g5], %g5
137 call %g5
138 nop
139
140 /* Start this processor. */
141 call smp_callin
142 nop
143
144 b,a smp_panic
145
146 .align 4
147 .global leon_smp_cpu_startup, smp_penguin_ctable
148
149leon_smp_cpu_startup:
150
151 set smp_penguin_ctable,%g1
152 ld [%g1+4],%g1
153 srl %g1,4,%g1
154 set 0x00000100,%g5 /* SRMMU_CTXTBL_PTR */
155 sta %g1, [%g5] ASI_LEON_MMUREGS
156
157 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
158 set (PSR_PIL | PSR_S | PSR_PS), %g1
159 wr %g1, 0x0, %psr ! traps off though
160 WRITE_PAUSE
161
162 /* Our %wim is one behind CWP */
163 mov 2, %g1
164 wr %g1, 0x0, %wim
165 WRITE_PAUSE
166
167 /* Set tbr - we use just one trap table. */
168 set trapbase, %g1
169 wr %g1, 0x0, %tbr
170 WRITE_PAUSE
171
172 /* Get our CPU id */
173 rd %asr17,%g3
174
175 /* Give ourselves a stack and curptr. */
176 set current_set, %g5
177 srl %g3, 28, %g4
178 sll %g4, 2, %g4
179 ld [%g5 + %g4], %g6
180
181 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
182 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
183 add %g6, %sp, %sp
184
185 /* Turn on traps (PSR_ET). */
186 rd %psr, %g1
187 wr %g1, PSR_ET, %psr ! traps on
188 WRITE_PAUSE
189
190 /* Init our caches, etc. */
191 set poke_srmmu, %g5
192 ld [%g5], %g5
193 call %g5
194 nop
195
196 /* Start this processor. */
197 call smp_callin
198 nop
199
200 b,a smp_panic
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * trampoline.S: SMP cpu boot-up trampoline code.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 */
8
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
18 .globl sun4m_cpu_startup
19 .globl sun4d_cpu_startup
20
21 .align 4
22
23/* When we start up a cpu for the first time it enters this routine.
24 * This initializes the chip from whatever state the prom left it
25 * in and sets PIL in %psr to 15, no irqs.
26 */
27
28sun4m_cpu_startup:
29cpu1_startup:
30 sethi %hi(trapbase_cpu1), %g3
31 b 1f
32 or %g3, %lo(trapbase_cpu1), %g3
33
34cpu2_startup:
35 sethi %hi(trapbase_cpu2), %g3
36 b 1f
37 or %g3, %lo(trapbase_cpu2), %g3
38
39cpu3_startup:
40 sethi %hi(trapbase_cpu3), %g3
41 b 1f
42 or %g3, %lo(trapbase_cpu3), %g3
43
441:
45 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
46 set (PSR_PIL | PSR_S | PSR_PS), %g1
47 wr %g1, 0x0, %psr ! traps off though
48 WRITE_PAUSE
49
50 /* Our %wim is one behind CWP */
51 mov 2, %g1
52 wr %g1, 0x0, %wim
53 WRITE_PAUSE
54
55 /* This identifies "this cpu". */
56 wr %g3, 0x0, %tbr
57 WRITE_PAUSE
58
59 /* Give ourselves a stack and curptr. */
60 set current_set, %g5
61 srl %g3, 10, %g4
62 and %g4, 0xc, %g4
63 ld [%g5 + %g4], %g6
64
65 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
66 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
67 add %g6, %sp, %sp
68
69 /* Turn on traps (PSR_ET). */
70 rd %psr, %g1
71 wr %g1, PSR_ET, %psr ! traps on
72 WRITE_PAUSE
73
74 /* Init our caches, etc. */
75 set poke_srmmu, %g5
76 ld [%g5], %g5
77 call %g5
78 nop
79
80 /* Start this processor. */
81 call smp_callin
82 nop
83
84 b,a smp_panic
85
86 .text
87 .align 4
88
89smp_panic:
90 call cpu_panic
91 nop
92
93/* CPUID in bootbus can be found at PA 0xff0140000 */
94#define SUN4D_BOOTBUS_CPUID 0xf0140000
95
96 .align 4
97
98sun4d_cpu_startup:
99 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
100 set (PSR_PIL | PSR_S | PSR_PS), %g1
101 wr %g1, 0x0, %psr ! traps off though
102 WRITE_PAUSE
103
104 /* Our %wim is one behind CWP */
105 mov 2, %g1
106 wr %g1, 0x0, %wim
107 WRITE_PAUSE
108
109 /* Set tbr - we use just one trap table. */
110 set trapbase, %g1
111 wr %g1, 0x0, %tbr
112 WRITE_PAUSE
113
114 /* Get our CPU id out of bootbus */
115 set SUN4D_BOOTBUS_CPUID, %g3
116 lduba [%g3] ASI_M_CTL, %g3
117 and %g3, 0xf8, %g3
118 srl %g3, 3, %g1
119 sta %g1, [%g0] ASI_M_VIKING_TMP1
120
121 /* Give ourselves a stack and curptr. */
122 set current_set, %g5
123 srl %g3, 1, %g4
124 ld [%g5 + %g4], %g6
125
126 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
127 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
128 add %g6, %sp, %sp
129
130 /* Turn on traps (PSR_ET). */
131 rd %psr, %g1
132 wr %g1, PSR_ET, %psr ! traps on
133 WRITE_PAUSE
134
135 /* Init our caches, etc. */
136 set poke_srmmu, %g5
137 ld [%g5], %g5
138 call %g5
139 nop
140
141 /* Start this processor. */
142 call smp_callin
143 nop
144
145 b,a smp_panic
146
147 .align 4
148 .global leon_smp_cpu_startup, smp_penguin_ctable
149
150leon_smp_cpu_startup:
151
152 set smp_penguin_ctable,%g1
153 ld [%g1+4],%g1
154 srl %g1,4,%g1
155 set 0x00000100,%g5 /* SRMMU_CTXTBL_PTR */
156 sta %g1, [%g5] ASI_LEON_MMUREGS
157
158 /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
159 set (PSR_PIL | PSR_S | PSR_PS), %g1
160 wr %g1, 0x0, %psr ! traps off though
161 WRITE_PAUSE
162
163 /* Our %wim is one behind CWP */
164 mov 2, %g1
165 wr %g1, 0x0, %wim
166 WRITE_PAUSE
167
168 /* Set tbr - we use just one trap table. */
169 set trapbase, %g1
170 wr %g1, 0x0, %tbr
171 WRITE_PAUSE
172
173 /* Get our CPU id */
174 rd %asr17,%g3
175
176 /* Give ourselves a stack and curptr. */
177 set current_set, %g5
178 srl %g3, 28, %g4
179 sll %g4, 2, %g4
180 ld [%g5 + %g4], %g6
181
182 sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
183 or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
184 add %g6, %sp, %sp
185
186 /* Turn on traps (PSR_ET). */
187 rd %psr, %g1
188 wr %g1, PSR_ET, %psr ! traps on
189 WRITE_PAUSE
190
191 /* Init our caches, etc. */
192 set poke_srmmu, %g5
193 ld [%g5], %g5
194 call %g5
195 nop
196
197 /* Start this processor. */
198 call smp_callin
199 nop
200
201 b,a smp_panic