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 202