1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * trampoline.S: SMP cpu boot-up trampoline co
4 *
5 * Copyright (C) 1995 David S. Miller (davem@c
6 * Copyright (C) 1998 Jakub Jelinek (jj@sunsit
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 i
24 * This initializes the chip from whatever sta
25 * in and sets PIL in %psr to 15, no irqs.
26 */
27
28 sun4m_cpu_startup:
29 cpu1_startup:
30 sethi %hi(trapbase_cpu1), %g3
31 b 1f
32 or %g3, %lo(trapbase_cpu1), %g3
33
34 cpu2_startup:
35 sethi %hi(trapbase_cpu2), %g3
36 b 1f
37 or %g3, %lo(trapbase_cpu2), %g3
38
39 cpu3_startup:
40 sethi %hi(trapbase_cpu3), %g3
41 b 1f
42 or %g3, %lo(trapbase_cpu3), %g3
43
44 1:
45 /* Set up a sane %psr -- PIL<0xf> S<0x
46 set (PSR_PIL | PSR_S | PSR_PS), %g
47 wr %g1, 0x0, %psr ! trap
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_S
66 or %sp, %lo(THREAD_SIZE - STACKFR
67 add %g6, %sp, %sp
68
69 /* Turn on traps (PSR_ET). */
70 rd %psr, %g1
71 wr %g1, PSR_ET, %psr ! trap
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
89 smp_panic:
90 call cpu_panic
91 nop
92
93 /* CPUID in bootbus can be found at PA 0xff014
94 #define SUN4D_BOOTBUS_CPUID 0xf0140000
95
96 .align 4
97
98 sun4d_cpu_startup:
99 /* Set up a sane %psr -- PIL<0xf> S<0x
100 set (PSR_PIL | PSR_S | PSR_PS), %g
101 wr %g1, 0x0, %psr ! trap
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 tabl
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_S
127 or %sp, %lo(THREAD_SIZE - STACKFR
128 add %g6, %sp, %sp
129
130 /* Turn on traps (PSR_ET). */
131 rd %psr, %g1
132 wr %g1, PSR_ET, %psr ! trap
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_peng
149
150 leon_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<0x
159 set (PSR_PIL | PSR_S | PSR_PS), %g
160 wr %g1, 0x0, %psr ! trap
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 tabl
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_S
183 or %sp, %lo(THREAD_SIZE - STACKFR
184 add %g6, %sp, %sp
185
186 /* Turn on traps (PSR_ET). */
187 rd %psr, %g1
188 wr %g1, PSR_ET, %psr ! trap
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
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