1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26#include "assym.h" 27 28#include <sys/asm_linkage.h> 29#include <sys/machthread.h> 30#include <sys/param.h> 31#include <sys/vm_machparam.h> 32#include <sys/privregs.h> 33#include <sys/intreg.h> 34#include <sys/vis.h> 35#include <sys/clock.h> 36#include <vm/hat_sfmmu.h> 37 38 .weak cpu_feature_init 39 .type cpu_feature_init, #function 40 41 .weak cpu_early_feature_init 42 .type cpu_early_feature_init, #function 43 44/* 45 * Processor initialization 46 * 47 * This is the kernel entry point for other cpus except the first one. 48 * When the prom jumps to this location we are still executing with the 49 * prom's trap table. It expects the cpuid as its first parameter. 50 */ 51 52 ! allocate a temporary stack to run on while we figure who and 53 ! what we are. 54 .seg ".data" 55 .align 8 56etmpstk: 57 .skip 2048 58tmpstk: 59 .word 0 60 61 ENTRY_NP(cpu_startup) 62 ! 63 ! Initialize CPU state registers 64 ! 65 ! The boot cpu and other cpus are different. The boot cpu has gone 66 ! through boot, and its state might be affected as a result. The 67 ! other cpus' states come directly from the prom. 68 ! 69 wrpr %g0, PSTATE_KERN, %pstate 70 wr %g0, %g0, %fprs ! clear fprs 71 CLEARTICKNPT ! allow user rdtick 72 73 ! 74 ! Set up temporary stack 75 ! 76 set tmpstk, %g1 77 sub %g1, SA(KFPUSIZE+GSR_SIZE), %g2 78 and %g2, 0x3F, %g3 79 sub %g2, %g3, %o2 80 sub %o2, SA(MINFRAME) + STACK_BIAS, %sp 81 82 mov %o0, %l1 ! save cpuid 83 84 call sfmmu_mp_startup 85 sub %g0, 1, THREAD_REG ! catch any curthread acceses 86 87 ! On OPL platforms, context page size TLB programming must be enabled in 88 ! ASI_MEMCNTL. To avoid Olympus-C and Jupiter sTLB errata (strands with 89 ! different TLB page size settings), this must be done here before any 90 ! reference to non-nucleus memory. An early hook is added to perform 91 ! cpu specific initialization. 92 ! 93 sethi %hi(cpu_early_feature_init), %o0 94 or %o0, %lo(cpu_early_feature_init), %o0 95 brz %o0, 0f 96 nop 97 call %o0 98 nop 99 1000: 101 ! SET_KCONTEXTREG(reg0, reg1, reg2, reg3, reg4, label1, label2, label3) 102 SET_KCONTEXTREG(%o0, %g1, %g2, %g3, %l3, l1, l2, l3) 103 104 ! We are now running on the kernel's trap table. 105 ! 106 ! It is very important to have a thread pointer and a cpu struct 107 ! *before* calling into C routines . 108 ! Otherwise, overflow/underflow handlers, etc. can get very upset! 109 ! 110 ! 111 ! We don't want to simply increment 112 ! ncpus right now because it is in the cache, and 113 ! we don't have the cache on yet for this CPU. 114 ! 115 set cpu, %l3 116 sll %l1, CPTRSHIFT, %l2 ! offset into CPU vector. 117 ldn [%l3 + %l2], %l3 ! pointer to CPU struct 118 ldn [%l3 + CPU_THREAD], THREAD_REG ! set thread pointer (%g7) 119 120 ! 121 ! Set up any required cpu feature 122 ! 123 sethi %hi(cpu_feature_init), %o0 124 or %o0, %lo(cpu_feature_init), %o0 125 brz %o0, 1f 126 nop 127 call %o0 128 nop 129 1301: 131 ! 132 ! Resume the thread allocated for the CPU. 133 ! 134 ldn [THREAD_REG + T_PC], %i7 135 ldn [THREAD_REG + T_SP], %fp 136 ret ! "return" into the thread 137 restore ! WILL cause underflow 138 SET_SIZE(cpu_startup) 139 140