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Diffstat (limited to 'dev/simple_disk.cc')
-rw-r--r-- | dev/simple_disk.cc | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/dev/simple_disk.cc b/dev/simple_disk.cc new file mode 100644 index 000000000..25645db5f --- /dev/null +++ b/dev/simple_disk.cc @@ -0,0 +1,108 @@ +/* + * Copyright (c) 2003 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* @file + * Simple disk interface for the system console + */ + +#include <string> + +#include <sys/types.h> +#include <sys/uio.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> + +#include "disk_image.hh" +#include "misc.hh" +#include "physical_memory.hh" +#include "simple_disk.hh" +#include "trace.hh" + +using namespace std; + +SimpleDisk::SimpleDisk(const string &name, PhysicalMemory *pmem, + DiskImage *img) + : SimObject(name), physmem(pmem), image(img) +{} + +SimpleDisk::~SimpleDisk() +{} + + +void +SimpleDisk::read(Addr addr, baddr_t block, int count) const +{ + uint8_t *data = physmem->dma_addr(addr, count); + if (!data) + panic("dma out of range! read addr=%#x count=%d\n", addr, count); + + if (count & (SectorSize - 1)) + panic("Not reading a multiple of a sector (count = %d)", count); + + for (int i = 0, j = 0; i < count; i += SectorSize, j++) + image->read(data + i, block + j); + + DPRINTF(SimpleDisk, "read block=%#x len=%d\n", (uint64_t)block, count); + DDUMP(SimpleDiskData, data, count); +} + +void +SimpleDisk::write(Addr addr, baddr_t block, int count) +{ + panic("unimplemented!\n"); + +#if 0 + uint8_t *data = physmem->dma_addr(addr, count); + if (!data) + panic("dma out of range! write addr=%#x count=%d\n", addr, count); + + image->write(data, block, count); +#endif +} + +BEGIN_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk) + + SimObjectParam<PhysicalMemory *> physmem; + SimObjectParam<DiskImage *> disk; + +END_DECLARE_SIM_OBJECT_PARAMS(SimpleDisk) + +BEGIN_INIT_SIM_OBJECT_PARAMS(SimpleDisk) + + INIT_PARAM(physmem, "Physical Memory"), + INIT_PARAM(disk, "Disk Image") + +END_INIT_SIM_OBJECT_PARAMS(SimpleDisk) + +CREATE_SIM_OBJECT(SimpleDisk) +{ + return new SimpleDisk(getInstanceName(), physmem, disk); +} + +REGISTER_SIM_OBJECT("SimpleDisk", SimpleDisk) |