diff options
Diffstat (limited to 'hw/serial.c')
| -rw-r--r-- | hw/serial.c | 185 |
1 files changed, 31 insertions, 154 deletions
diff --git a/hw/serial.c b/hw/serial.c index 4925612..8f95d08 100644 --- a/hw/serial.c +++ b/hw/serial.c @@ -22,12 +22,11 @@ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ -#include "hw.h" + +#include "serial.h" #include "qemu-char.h" -#include "isa.h" -#include "pc.h" #include "qemu-timer.h" -#include "sysemu.h" +#include "exec-memory.h" //#define DEBUG_SERIAL @@ -93,8 +92,6 @@ #define UART_FCR_RFR 0x02 /* RCVR Fifo Reset */ #define UART_FCR_FE 0x01 /* FIFO Enable */ -#define UART_FIFO_LENGTH 16 /* 16550A Fifo Length */ - #define XMIT_FIFO 0 #define RECV_FIFO 1 #define MAX_XMIT_RETRY 4 @@ -107,64 +104,6 @@ do { fprintf(stderr, "serial: " fmt , ## __VA_ARGS__); } while (0) do {} while (0) #endif -typedef struct SerialFIFO { - uint8_t data[UART_FIFO_LENGTH]; - uint8_t count; - uint8_t itl; /* Interrupt Trigger Level */ - uint8_t tail; - uint8_t head; -} SerialFIFO; - -struct SerialState { - uint16_t divider; - uint8_t rbr; /* receive register */ - uint8_t thr; /* transmit holding register */ - uint8_t tsr; /* transmit shift register */ - uint8_t ier; - uint8_t iir; /* read only */ - uint8_t lcr; - uint8_t mcr; - uint8_t lsr; /* read only */ - uint8_t msr; /* read only */ - uint8_t scr; - uint8_t fcr; - uint8_t fcr_vmstate; /* we can't write directly this value - it has side effects */ - /* NOTE: this hidden state is necessary for tx irq generation as - it can be reset while reading iir */ - int thr_ipending; - qemu_irq irq; - CharDriverState *chr; - int last_break_enable; - int it_shift; - int baudbase; - int tsr_retry; - uint32_t wakeup; - - uint64_t last_xmit_ts; /* Time when the last byte was successfully sent out of the tsr */ - SerialFIFO recv_fifo; - SerialFIFO xmit_fifo; - - struct QEMUTimer *fifo_timeout_timer; - int timeout_ipending; /* timeout interrupt pending state */ - struct QEMUTimer *transmit_timer; - - - uint64_t char_transmit_time; /* time to transmit a char in ticks*/ - int poll_msl; - - struct QEMUTimer *modem_status_poll; - MemoryRegion io; -}; - -typedef struct ISASerialState { - ISADevice dev; - uint32_t index; - uint32_t iobase; - uint32_t isairq; - SerialState state; -} ISASerialState; - static void serial_receive1(void *opaque, const uint8_t *buf, int size); static void fifo_clear(SerialState *s, int fifo) @@ -367,7 +306,8 @@ static void serial_xmit(void *opaque) } -static void serial_ioport_write(void *opaque, uint32_t addr, uint32_t val) +static void serial_ioport_write(void *opaque, hwaddr addr, uint64_t val, + unsigned size) { SerialState *s = opaque; @@ -520,7 +460,7 @@ static void serial_ioport_write(void *opaque, uint32_t addr, uint32_t val) } } -static uint32_t serial_ioport_read(void *opaque, uint32_t addr) +static uint64_t serial_ioport_read(void *opaque, hwaddr addr, unsigned size) { SerialState *s = opaque; uint32_t ret; @@ -689,12 +629,12 @@ static int serial_post_load(void *opaque, int version_id) s->fcr_vmstate = 0; } /* Initialize fcr via setter to perform essential side-effects */ - serial_ioport_write(s, 0x02, s->fcr_vmstate); + serial_ioport_write(s, 0x02, s->fcr_vmstate, 1); serial_update_parameters(s); return 0; } -static const VMStateDescription vmstate_serial = { +const VMStateDescription vmstate_serial = { .name = "serial", .version_id = 3, .minimum_version_id = 2, @@ -743,7 +683,7 @@ static void serial_reset(void *opaque) qemu_irq_lower(s->irq); } -static void serial_init_core(SerialState *s) +void serial_init_core(SerialState *s) { if (!s->chr) { fprintf(stderr, "Can't create serial device, empty char device\n"); @@ -761,6 +701,12 @@ static void serial_init_core(SerialState *s) serial_event, s); } +void serial_exit_core(SerialState *s) +{ + qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, NULL); + qemu_unregister_reset(serial_reset, s); +} + /* Get number of stored bytes in receive fifo. */ unsigned serial_rx_fifo_count(SerialState *s) { @@ -780,52 +726,14 @@ void serial_set_frequency(SerialState *s, uint32_t frequency) serial_update_parameters(s); } -static const int isa_serial_io[MAX_SERIAL_PORTS] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 }; -static const int isa_serial_irq[MAX_SERIAL_PORTS] = { 4, 3, 4, 3 }; - -static const MemoryRegionPortio serial_portio[] = { - { 0, 8, 1, .read = serial_ioport_read, .write = serial_ioport_write }, - PORTIO_END_OF_LIST() -}; - -static const MemoryRegionOps serial_io_ops = { - .old_portio = serial_portio -}; - -static int serial_isa_initfn(ISADevice *dev) -{ - static int index; - ISASerialState *isa = DO_UPCAST(ISASerialState, dev, dev); - SerialState *s = &isa->state; - - if (isa->index == -1) - isa->index = index; - if (isa->index >= MAX_SERIAL_PORTS) - return -1; - if (isa->iobase == -1) - isa->iobase = isa_serial_io[isa->index]; - if (isa->isairq == -1) - isa->isairq = isa_serial_irq[isa->index]; - index++; - - s->baudbase = 115200; - isa_init_irq(dev, &s->irq, isa->isairq); - serial_init_core(s); - qdev_set_legacy_instance_id(&dev->qdev, isa->iobase, 3); - - memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8); - isa_register_ioport(dev, &s->io, isa->iobase); - return 0; -} - -static const VMStateDescription vmstate_isa_serial = { - .name = "serial", - .version_id = 3, - .minimum_version_id = 2, - .fields = (VMStateField []) { - VMSTATE_STRUCT(state, ISASerialState, 0, vmstate_serial, SerialState), - VMSTATE_END_OF_LIST() - } +const MemoryRegionOps serial_io_ops = { + .read = serial_ioport_read, + .write = serial_ioport_write, + .impl = { + .min_access_size = 1, + .max_access_size = 1, + }, + .endianness = DEVICE_LITTLE_ENDIAN, }; SerialState *serial_init(int base, qemu_irq irq, int baudbase, @@ -842,25 +750,26 @@ SerialState *serial_init(int base, qemu_irq irq, int baudbase, vmstate_register(NULL, base, &vmstate_serial, s); - register_ioport_write(base, 8, 1, serial_ioport_write, s); - register_ioport_read(base, 8, 1, serial_ioport_read, s); + memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8); + memory_region_add_subregion(get_system_io(), base, &s->io); + return s; } /* Memory mapped interface */ -static uint64_t serial_mm_read(void *opaque, target_phys_addr_t addr, +static uint64_t serial_mm_read(void *opaque, hwaddr addr, unsigned size) { SerialState *s = opaque; - return serial_ioport_read(s, addr >> s->it_shift); + return serial_ioport_read(s, addr >> s->it_shift, 1); } -static void serial_mm_write(void *opaque, target_phys_addr_t addr, +static void serial_mm_write(void *opaque, hwaddr addr, uint64_t value, unsigned size) { SerialState *s = opaque; value &= ~0u >> (32 - (size * 8)); - serial_ioport_write(s, addr >> s->it_shift, value); + serial_ioport_write(s, addr >> s->it_shift, value, 1); } static const MemoryRegionOps serial_mm_ops[3] = { @@ -882,7 +791,7 @@ static const MemoryRegionOps serial_mm_ops[3] = { }; SerialState *serial_mm_init(MemoryRegion *address_space, - target_phys_addr_t base, int it_shift, + hwaddr base, int it_shift, qemu_irq irq, int baudbase, CharDriverState *chr, enum device_endian end) { @@ -927,35 +836,3 @@ qemu_irq *serial_get_irq(SerialState *s) { return &s->irq; } - -static Property serial_isa_properties[] = { - DEFINE_PROP_UINT32("index", ISASerialState, index, -1), - DEFINE_PROP_HEX32("iobase", ISASerialState, iobase, -1), - DEFINE_PROP_UINT32("irq", ISASerialState, isairq, -1), - DEFINE_PROP_CHR("chardev", ISASerialState, state.chr), - DEFINE_PROP_UINT32("wakeup", ISASerialState, state.wakeup, 0), - DEFINE_PROP_END_OF_LIST(), -}; - -static void serial_isa_class_initfn(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); - ic->init = serial_isa_initfn; - dc->vmsd = &vmstate_isa_serial; - dc->props = serial_isa_properties; -} - -static TypeInfo serial_isa_info = { - .name = "isa-serial", - .parent = TYPE_ISA_DEVICE, - .instance_size = sizeof(ISASerialState), - .class_init = serial_isa_class_initfn, -}; - -static void serial_register_types(void) -{ - type_register_static(&serial_isa_info); -} - -type_init(serial_register_types) |