X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Fide.c;h=0d6e0b2dc6060b47beeaa98f43481616a3be9943;hb=074d44443cd1dc65660b2859503ad9f72bce625a;hp=87e10c3723de4f082f8de19ce5f8fec2a154cb18;hpb=6fe0528310bec884ed00c8d97b45d18120a32e3f;p=palacios.git diff --git a/palacios/src/devices/ide.c b/palacios/src/devices/ide.c index 87e10c3..0d6e0b2 100644 --- a/palacios/src/devices/ide.c +++ b/palacios/src/devices/ide.c @@ -20,7 +20,10 @@ #include #include #include "ide-types.h" +#include "atapi-types.h" +#define PRI_DEFAULT_IRQ 14 +#define SEC_DEFAULT_IRQ 15 #define PRI_DATA_PORT 0x1f0 @@ -46,6 +49,7 @@ #define SEC_ADDR_REG_PORT 0x377 +#define DATA_BUFFER_SIZE 2048 static const char * ide_dev_type_strs[] = {"HARDDISK", "CDROM", "NONE"}; @@ -60,7 +64,14 @@ static inline const char * device_type_to_str(v3_ide_dev_type_t type) { +struct ide_cd_state { + struct atapi_sense_data sense; + uint_t current_lba; +}; + +struct ide_hd_state { +}; struct ide_drive { // Command Registers @@ -73,10 +84,26 @@ struct ide_drive { }; + union { + struct ide_cd_state cd_state; + struct ide_hd_state hd_state; + }; + char model[41]; + + // Where we are in the data transfer + uint_t transfer_index; + + // the length of a transfer + // calculated for easy access + uint_t transfer_length; + + // We have a local data buffer that we use for IO port accesses + uint8_t data_buf[DATA_BUFFER_SIZE]; + void * private_data; - uint8_t sector_count; // 0x1f2,0x172 + uint8_t sector_count; // 0x1f2,0x172 uint8_t sector_num; // 0x1f3,0x173 union { uint16_t cylinder; @@ -102,7 +129,9 @@ struct ide_channel { struct ide_drive_head_reg drive_head; // 0x1f6,0x176 struct ide_status_reg status; // [read] 0x1f7,0x177 - uint8_t command_reg; // [write] 0x1f7,0x177 + uint8_t cmd_reg; // [write] 0x1f7,0x177 + + int irq; // this is temporary until we add PCI support // Control Registers struct ide_ctrl_reg ctrl_reg; // [write] 0x3f6,0x376 @@ -116,6 +145,17 @@ struct ide_internal { +static inline uint32_t be_to_le_16(const uint16_t val) { + uint8_t * buf = (uint8_t *)&val; + return (buf[0] << 8) | (buf[1]) ; +} + + +static inline uint32_t be_to_le_32(const uint32_t val) { + uint8_t * buf = (uint8_t *)&val; + return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; +} + static inline int get_channel_index(ushort_t port) { if (((port & 0xfff8) == 0x1f0) || @@ -144,6 +184,13 @@ static inline int is_lba_enabled(struct ide_channel * channel) { } +static void ide_raise_irq(struct vm_device * dev, struct ide_channel * channel) { + if (channel->ctrl_reg.irq_disable == 0) { + v3_raise_irq(dev->vm, channel->irq); + } +} + + static void drive_reset(struct ide_drive * drive) { drive->sector_count = 0x01; drive->sector_num = 0x01; @@ -154,6 +201,11 @@ static void drive_reset(struct ide_drive * drive) { drive->cylinder = 0x0000; } + + memset(drive->data_buf, 0, sizeof(drive->data_buf)); + drive->transfer_length = 0; + drive->transfer_index = 0; + // Send the reset signal to the connected device callbacks // channel->drives[0].reset(); // channel->drives[1].reset(); @@ -168,7 +220,7 @@ static void channel_reset(struct ide_channel * channel) { channel->error_reg.val = 0x01; // clear commands - channel->command_reg = 0x00; + channel->cmd_reg = 0x00; channel->ctrl_reg.irq_disable = 0; } @@ -184,22 +236,152 @@ static void channel_reset_complete(struct ide_channel * channel) { } +static void ide_abort_command(struct vm_device * dev, struct ide_channel * channel) { + channel->status.val = 0x41; // Error + ready + channel->error_reg.val = 0x04; // No idea... + + ide_raise_irq(dev, channel); +} + + + + +// Include the ATAPI interface handlers +#include "atapi.h" + + + static int write_cmd_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) { + struct ide_internal * ide = (struct ide_internal *)(dev->private_data); + struct ide_channel * channel = get_selected_channel(ide, port); + struct ide_drive * drive = get_selected_drive(channel); + + if (length != 1) { + PrintError("Invalid Write Length on IDE command Port %x\n", port); + return -1; + } + PrintDebug("IDE: Writing Command Port %x (val=%x)\n", port, *(uint8_t *)src); - return -1; + + channel->cmd_reg = *(uint8_t *)src; + + switch (channel->cmd_reg) { + + case 0xa0: // ATAPI Command Packet + if (drive->drive_type != IDE_CDROM) { + ide_abort_command(dev, channel); + } + + drive->sector_count = 1; + + channel->status.busy = 0; + channel->status.write_fault = 0; + channel->status.data_req = 1; + channel->status.error = 0; + + // reset the data buffer... + drive->transfer_length = ATAPI_PACKET_SIZE; + drive->transfer_index = 0; + + break; + case 0xa1: // ATAPI Identify Device Packet + atapi_identify_device(drive); + + channel->error_reg.val = 0; + channel->status.val = 0x58; // ready, data_req, seek_complete + + ide_raise_irq(dev, channel); + break; + case 0xec: // Identify Device + if (drive->drive_type != IDE_DISK) { + drive_reset(drive); + + // JRL: Should we abort here? + ide_abort_command(dev, channel); + } else { + PrintError("IDE Disks currently not implemented\n"); + return -1; + } + break; + default: + PrintError("Unimplemented IDE command (%x)\n", channel->cmd_reg); + return -1; + } + + return length; } static int write_data_port(ushort_t port, void * src, uint_t length, struct vm_device * dev) { - PrintDebug("IDE: Writing Data Port %x (val=%x)\n", port, *(uint8_t *)src); - return -1; + struct ide_internal * ide = (struct ide_internal *)(dev->private_data); + struct ide_channel * channel = get_selected_channel(ide, port); + struct ide_drive * drive = get_selected_drive(channel); + + PrintDebug("IDE: Writing Data Port %x (val=%x, len=%d)\n", port, *(uint32_t *)src, length); + + memcpy(drive->data_buf + drive->transfer_index, src, length); + drive->transfer_index += length; + + // Transfer is complete, dispatch the command + if (drive->transfer_index >= drive->transfer_length) { + switch (channel->cmd_reg) { + case 0x30: // Write Sectors + PrintError("Writing Data not yet implemented\n"); + return -1; + + case 0xa0: // ATAPI packet command + if (atapi_handle_packet(dev, channel) == -1) { + PrintError("Error handling ATAPI packet\n"); + return -1; + } + break; + default: + PrintError("Unhandld IDE Command %x\n", channel->cmd_reg); + return -1; + } + } + + return length; } static int read_data_port(ushort_t port, void * dst, uint_t length, struct vm_device * dev) { + struct ide_internal * ide = (struct ide_internal *)(dev->private_data); + struct ide_channel * channel = get_selected_channel(ide, port); + struct ide_drive * drive = get_selected_drive(channel); + int data_offset = drive->transfer_index % DATA_BUFFER_SIZE; + PrintDebug("IDE: Reading Data Port %x\n", port); - return -1; + + if (data_offset == DATA_BUFFER_SIZE) { + // check for more data to transfer, if there isn't any then that's a problem... + /* + * if (ide_update_buffer(drive) == -1) { + * return -1; + * } + */ + return -1; + } + + + // check for overruns... + // We will return the data padded with 0's + if (drive->transfer_index + length > drive->transfer_length) { + length = drive->transfer_length - drive->transfer_index; + memset(dst, 0, length); + } + + memcpy(dst, drive->data_buf + data_offset, length); + + drive->transfer_index += length; + + + if (drive->transfer_index >= drive->transfer_length) { + channel->status.data_req = 0; + } + + return length; } static int write_port_std(ushort_t port, void * src, uint_t length, struct vm_device * dev) { @@ -362,6 +544,8 @@ static int read_port_std(ushort_t port, void * dst, uint_t length, struct vm_dev return -1; } + PrintDebug("\tVal=%x\n", *(uint8_t *)dst); + return length; } @@ -377,6 +561,11 @@ static void init_drive(struct ide_drive * drive) { memset(drive->model, 0, sizeof(drive->model)); + drive->transfer_index = 0; + drive->transfer_length = 0; + memset(drive->data_buf, 0, sizeof(drive->data_buf)); + + drive->private_data = NULL; drive->cd_ops = NULL; } @@ -386,9 +575,10 @@ static void init_channel(struct ide_channel * channel) { channel->error_reg.val = 0x01; channel->drive_head.val = 0x00; channel->status.val = 0x00; - channel->command_reg = 0x00; + channel->cmd_reg = 0x00; channel->ctrl_reg.val = 0x08; + for (i = 0; i < 2; i++) { init_drive(&(channel->drives[i])); } @@ -400,6 +590,9 @@ static void init_ide_state(struct ide_internal * ide) { for (i = 0; i < 2; i++) { init_channel(&(ide->channels[i])); + + // JRL: this is a terrible hack... + ide->channels[i].irq = PRI_DEFAULT_IRQ + i; } } @@ -521,6 +714,11 @@ int v3_ide_register_cdrom(struct vm_device * ide_dev, strncpy(drive->model, dev_name, sizeof(drive->model) - 1); + while (strlen((char *)(drive->model)) < 40) { + strcat((char*)(drive->model), " "); + } + + drive->drive_type = IDE_CDROM; drive->cd_ops = ops;