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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29#if defined(lint) 30#include <sys/types.h> 31#include <sys/t_lock.h> 32#include <sys/promif.h> 33#include <sys/prom_isa.h> 34#endif /* lint */ 35 36#include <sys/asm_linkage.h> 37#include <sys/privregs.h> 38#include <sys/scb.h> 39#include <sys/machparam.h> 40#include <sys/machthread.h> 41 42#if defined(lint) 43 44#include <sys/thread.h> 45#include <sys/time.h> 46 47#else /* lint */ 48 49#include "assym.h" 50 51#endif /* lint */ 52 53/* 54 * void 55 * reestablish_curthread(void) 56 * - reestablishes the invariant that THREAD_REG contains 57 * the same value as the cpu struct for this cpu (implicit from 58 * where we're running). This is needed for OBP callback routines. 59 * The CPU_ADDR macro figures out the cpuid by reading hardware registers. 60 */ 61 62#if defined(lint) 63 64void 65reestablish_curthread(void) 66{} 67 68#else /* lint */ 69 70 ENTRY_NP(reestablish_curthread) 71 72 CPU_ADDR(%o0, %o1) 73 retl 74 ldn [%o0 + CPU_THREAD], THREAD_REG 75 SET_SIZE(reestablish_curthread) 76 77 78#endif /* lint */ 79 80/* 81 * Return the current THREAD pointer. 82 * This is also available as an inline function. 83 */ 84#if defined(lint) 85 86kthread_id_t 87threadp(void) 88{ return ((kthread_id_t)0); } 89 90#else /* lint */ 91 92 ENTRY_NP(threadp) 93 retl 94 mov THREAD_REG, %o0 95 SET_SIZE(threadp) 96 97#endif /* lint */ 98 99 100/* 101 * The IEEE 1275-1994 callback handler for a 64-bit SPARC V9 PROM calling 102 * a 32 bit client program. The PROM calls us with a 64 bit stack and a 103 * pointer to a client interface argument array in %o0. The called code 104 * returns 0 if the call succeeded (i.e. the service name exists) or -1 105 * if the call failed. NOTE: All addresses are in the range 0..2^^32-1 106 * 107 * This code is called as trusted subroutine of the firmware, and is 108 * called with %tba pointing to the boot firmware's trap table. All of 109 * the prom's window handlers are mixed mode handlers. 110 */ 111 112#if defined(lint) 113 114int 115callback_handler(cell_t *arg_array) 116{ 117 extern int vx_handler(cell_t *arg_array); 118 119 return (vx_handler(arg_array)); 120} 121 122#else /* lint */ 123 124 ENTRY_NP(callback_handler) 125 ! 126 ! We assume we are called with a 64 bit stack with PSTATE_AM clear 127 ! 128 save %sp, -SA64(MINFRAME64), %sp ! 64 bit save 129 rdpr %wstate, %l5 ! save %wstate 130 andn %l5, WSTATE_MASK, %l6 131 wrpr %l6, WSTATE_KMIX, %wstate 132 rdpr %pstate, %l0 ! save %pstate 133 134 ! 135 ! If anybody tries to trace the call stack of this callback 136 ! then the traceback should stop here. This matters 137 ! particularly for sync callbacks on Serengeti, but it's a 138 ! good idea generally. 139 ! 140 flushw 141 mov %fp, %l1 142 clr %fp ! terminate stack traces 143 144 call vx_handler ! vx_handler(void **arg_array) 145 mov %i0, %o0 ! delay; argument array 146 sra %o0, 0, %i0 ! sign extend result 147 148 mov %l1, %fp ! restore %fp for return 149 1501: wrpr %g0, %l0, %pstate ! restore %pstate 151 wrpr %g0, %l5, %wstate ! restore %wstate 152 153 ret ! return result in %o0 154 restore ! back to a 64 bit stack 155 SET_SIZE(callback_handler) 156 157#endif /* lint */ 158 159