simple_disk.cc revision 2
1/* 2 * Copyright (c) 2003 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 29/* @file 30 * Simple disk interface for the system console 31 */ 32 33#include <string> 34 35#include <sys/types.h> 36#include <sys/uio.h> 37#include <fcntl.h> 38#include <string.h> 39#include <unistd.h> 40 41#include "disk_image.hh" 42#include "misc.hh" 43#include "physical_memory.hh" 44#include "simple_disk.hh" 45#include "trace.hh" 46 47using namespace std; 48 49SimpleDisk::SimpleDisk(const string &name, PhysicalMemory *pmem, 50 DiskImage *img) 51 : SimObject(name), physmem(pmem), image(img) 52{} 53 54SimpleDisk::~SimpleDisk() 55{} 56 57 58void 59SimpleDisk::read(Addr addr, baddr_t block, int count) const 60{ 61 uint8_t *data = physmem->dma_addr(addr, count); 62 if (!data) 63 panic("dma out of range! read addr=%#x count=%d\n", addr, count); 64 65 if (count & (SectorSize - 1)) 66 panic("Not reading a multiple of a sector (count = %d)", count); 67 68 for (int i = 0, j = 0; i < count; i += SectorSize, j++) 69 image->read(data + i, block + j); 70 71 DPRINTF(SimpleDisk, "read block=%#x len=%d\n", (uint64_t)block, count); 72 DDUMP(SimpleDiskData, data, count); 73} 74 75void 76SimpleDisk::write(Addr addr, baddr_t block, int count) 77{ 78 panic("unimplemented!\n"); 79 80#if 0 81 uint8_t *data = physmem->dma_addr(addr, count); 82 if (!data) 83 panic("dma out of range! write addr=%#x count=%d\n", addr, count); 84 85 image->write(data, block, count); 86#endif 87} 88 89BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk) 90 91 SimObjectParam<PhysicalMemory *> physmem; 92 SimObjectParam<DiskImage *> disk; 93 94END_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk) 95 96BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleDisk) 97 98 INIT_PARAM(physmem, "Physical Memory"), 99 INIT_PARAM(disk, "Disk Image") 100 101END_INIT_SIM_OBJECT_PARAMS(SimpleDisk) 102 103CREATE_SIM_OBJECT(SimpleDisk) 104{ 105 return new SimpleDisk(getInstanceName(), physmem, disk); 106} 107 108REGISTER_SIM_OBJECT("SimpleDisk", SimpleDisk) 109