#include <devices/ide.h>
+
+#ifndef DEBUG_IDE
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
struct hd_state {
addr_t disk_image;
uint32_t capacity; // in bytes
};
-// HDs always read 2048 byte blocks... ?
-static int hd_read(uint8_t * buf, int count, int lba, void * private_data) {
+// HDs always read 512 byte blocks... ?
+static int hd_read(uint8_t * buf, int sector_count, uint64_t lba, void * private_data) {
struct vm_device * hd_dev = (struct vm_device *)private_data;
struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
- int offset = lba * IDE_SECTOR_SIZE;
- int length = ((offset + count) > hd->capacity) ? (hd->capacity - offset) : count;
+ int offset = lba * HD_SECTOR_SIZE;
+ int length = sector_count * HD_SECTOR_SIZE;
- PrintDebug("Reading RAM HD at (LBA=%d) offset %d (length=%d)\n", lba, offset, length);
+ // PrintDebug("Reading RAM HD at (LBA=%d) offset %d (length=%d)\n", (uint32_t)lba, offset, length);
memcpy(buf, (uint8_t *)(hd->disk_image + offset), length);
- // Pad out the rest of the buffer with 0's
- // memset(buf + length, 0, IDE_SECTOR_SIZE - length);
+ return 0;
+}
+
+
+static int hd_write(uint8_t * buf, int sector_count, uint64_t lba, void * private_data) {
+ struct vm_device * hd_dev = (struct vm_device *)private_data;
+ struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
+ int offset = lba * HD_SECTOR_SIZE;
+ int length = sector_count * HD_SECTOR_SIZE;
+
+ memcpy((uint8_t *)(hd->disk_image + offset), buf, length);
return 0;
}
-static uint32_t hd_get_capacity(void * private_data) {
+static uint64_t hd_get_capacity(void * private_data) {
struct vm_device * hd_dev = (struct vm_device *)private_data;
struct hd_state * hd = (struct hd_state *)(hd_dev->private_data);
PrintDebug("Querying RAM HD capacity (bytes=%d) (ret = %d)\n",
- hd->capacity, (hd->capacity + IDE_SECTOR_SIZE - 1) / IDE_SECTOR_SIZE);
- return (hd->capacity + IDE_SECTOR_SIZE - 1) / IDE_SECTOR_SIZE;
+ hd->capacity, hd->capacity / HD_SECTOR_SIZE);
+ return hd->capacity / HD_SECTOR_SIZE;
}
-static struct v3_ide_hd_ops hd_ops = {
+static struct v3_hd_ops hd_ops = {
.read = hd_read,
+ .write = hd_write,
.get_capacity = hd_get_capacity,
};
-static int hd_init(struct vm_device * dev) {
- struct hd_state * hd = (struct hd_state *)(dev->private_data);
- if (v3_ide_register_harddisk(hd->ide, hd->bus, hd->drive, "V3-RAM-HD", &hd_ops, dev) == -1) {
- return -1;
- }
-
- return 0;
-}
-
-static int hd_deinit(struct vm_device * dev) {
+static int hd_free(struct vm_device * dev) {
return 0;
}
-static struct vm_device_ops dev_ops = {
- .init = hd_init,
- .deinit = hd_deinit,
+static struct v3_device_ops dev_ops = {
+ .free = hd_free,
.reset = NULL,
.start = NULL,
.stop = NULL,
};
-struct vm_device * v3_create_ram_hd(struct vm_device * ide,
- uint_t bus, uint_t drive,
- addr_t ramdisk, uint32_t size) {
- struct hd_state * hd = (struct hd_state *)V3_Malloc(sizeof(struct hd_state));
+
+
+
+static int hd_init(struct guest_info * vm, void * cfg_data) {
+ struct hd_state * hd = NULL;
+ struct ram_hd_cfg * cfg = (struct ram_hd_cfg *)cfg_data;
+
+ if (cfg->size % HD_SECTOR_SIZE) {
+ PrintError("HD image must be an integral of sector size (HD_SECTOR_SIZE=%d)\n", HD_SECTOR_SIZE);
+ return -1;
+ }
+
+ hd = (struct hd_state *)V3_Malloc(sizeof(struct hd_state));
PrintDebug("Registering Ram HDD at %p (size=%d)\n", (void *)ramdisk, size);
- hd->disk_image = ramdisk;
- hd->capacity = size;
+ hd->disk_image = cfg->ramdisk;
+ hd->capacity = cfg->size;
+
+ hd->ide = v3_find_dev(vm, cfg->ide);
- hd->ide = ide;
- hd->bus = bus;
- hd->drive = drive;
+ if (hd->ide == 0) {
+ PrintError("Could not find backend %s\n", cfg->ide);
+ return -1;
+ }
+
+ hd->bus = cfg->bus;
+ hd->drive = cfg->drive;
- struct vm_device * hd_dev = v3_create_device("RAM-HD", &dev_ops, hd);
+ struct vm_device * dev = v3_allocate_device("RAM-HD", &dev_ops, hd);
+
+ if (v3_attach_device(vm, dev) == -1) {
+ PrintError("Could not attach device %s\n", "RAM-HD");
+ return -1;
+ }
+
- return hd_dev;
+ if (v3_ide_register_harddisk(hd->ide, hd->bus, hd->drive, "RAM-HD", &hd_ops, dev) == -1) {
+ return -1;
+ }
+
+ return 0;
}
+
+
+device_register("RAM-HD", hd_init)