106 lines
3 KiB
C
106 lines
3 KiB
C
/*
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*
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* Copyright (c) 2019 Jonathan Afek <jonyafek@me.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu-common.h"
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#include "hw/arm/boot.h"
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#include "sysemu/sysemu.h"
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#include "qemu/error-report.h"
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#include "hw/arm/xnu.h"
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#include "hw/loader.h"
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#include "hw/arm/xnu_file_mmio_dev.h"
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static uint64_t xnu_file_mmio_dev_read(void *opaque,
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hwaddr addr, unsigned size)
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{
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FileMmioDev *file_dev = opaque;
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uint64_t ret = 0;
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if (addr + size > file_dev->size) {
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abort();
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}
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if (size > sizeof(ret)) {
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abort();
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}
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if (addr != lseek(file_dev->fd, addr, SEEK_SET)) {
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abort();
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}
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if (size != read(file_dev->fd, &ret, size)) {
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abort();
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}
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return ret;
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}
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static void xnu_file_mmio_dev_write(void *opaque, hwaddr addr,
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uint64_t val, unsigned size)
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{
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FileMmioDev *file_dev = opaque;
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if (addr + size > file_dev->size) {
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abort();
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}
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if (addr != lseek(file_dev->fd, addr, SEEK_SET)) {
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abort();
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}
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if (size != write(file_dev->fd, &val, size)) {
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abort();
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}
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}
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const MemoryRegionOps xnu_file_mmio_dev_ops = {
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.read = xnu_file_mmio_dev_read,
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.write = xnu_file_mmio_dev_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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void xnu_file_mmio_dev_create(MemoryRegion *sysmem, FileMmioDev *file_dev,
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const char *name, const char *filename)
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{
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MemoryRegion *iomem = g_new(MemoryRegion, 1);
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struct stat st;
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if (-1 == lstat(filename, &st)) {
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abort();
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}
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file_dev->size = st.st_size;
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memory_region_init_io(iomem, NULL, &xnu_file_mmio_dev_ops, file_dev,
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name, file_dev->size);
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memory_region_add_subregion(sysmem, file_dev->pa, iomem);
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//TODO; think about using O_SYNC
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//or maybe use fsync() from time to time
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file_dev->fd = open(filename, O_RDWR);
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if (-1 == file_dev->fd) {
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abort();
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}
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}
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