system.cc revision 8706:b1838faf3bcc
1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ben Nash 29 */ 30 31/** 32 * @file 33 * Modifications for the FreeBSD kernel. 34 * Based on kern/linux/linux_system.cc. 35 * 36 */ 37 38#include "arch/alpha/freebsd/system.hh" 39#include "arch/alpha/system.hh" 40#include "arch/isa_traits.hh" 41#include "arch/vtophys.hh" 42#include "base/loader/symtab.hh" 43#include "cpu/thread_context.hh" 44#include "mem/fs_translating_port_proxy.hh" 45#include "sim/byteswap.hh" 46 47#define TIMER_FREQUENCY 1193180 48 49using namespace std; 50using namespace AlphaISA; 51 52FreebsdAlphaSystem::FreebsdAlphaSystem(Params *p) 53 : AlphaSystem(p) 54{ 55 /** 56 * Any time DELAY is called just skip the function. 57 * Shouldn't we actually emulate the delay? 58 */ 59 skipDelayEvent = addKernelFuncEvent<SkipFuncEvent>("DELAY"); 60 skipCalibrateClocks = 61 addKernelFuncEvent<SkipCalibrateClocksEvent>("calibrate_clocks"); 62} 63 64FreebsdAlphaSystem::~FreebsdAlphaSystem() 65{ 66 delete skipDelayEvent; 67 delete skipCalibrateClocks; 68} 69 70void 71FreebsdAlphaSystem::doCalibrateClocks(ThreadContext *tc) 72{ 73 Addr ppc_vaddr = 0; 74 Addr timer_vaddr = 0; 75 76 ppc_vaddr = (Addr)tc->readIntReg(17); 77 timer_vaddr = (Addr)tc->readIntReg(18); 78 79 virtProxy->write(ppc_vaddr, (uint32_t)SimClock::Frequency); 80 virtProxy->write(timer_vaddr, (uint32_t)TIMER_FREQUENCY); 81} 82 83void 84FreebsdAlphaSystem::SkipCalibrateClocksEvent::process(ThreadContext *tc) 85{ 86 SkipFuncEvent::process(tc); 87 ((FreebsdAlphaSystem *)tc->getSystemPtr())->doCalibrateClocks(tc); 88} 89 90FreebsdAlphaSystem * 91FreebsdAlphaSystemParams::create() 92{ 93 return new FreebsdAlphaSystem(this); 94} 95