diff options
author | Paolo Bonzini <pbonzini@redhat.com> | 2013-03-01 13:59:19 +0100 |
---|---|---|
committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-04-08 18:13:12 +0200 |
commit | 49ab747f668f421138d5b40d83fa279c4c5e278d (patch) | |
tree | 943225a04eac885aed038731adf058f2250a2f40 /hw/serial.c | |
parent | ce3b494cb504f96992f2d37ebc8f56deed202b06 (diff) |
hw: move target-independent files to subdirectories
This patch tackles all files that are compiled once, moving
them to subdirectories of hw/.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/serial.c')
-rw-r--r-- | hw/serial.c | 789 |
1 files changed, 0 insertions, 789 deletions
diff --git a/hw/serial.c b/hw/serial.c deleted file mode 100644 index 1151bf1bab..0000000000 --- a/hw/serial.c +++ /dev/null @@ -1,789 +0,0 @@ -/* - * QEMU 16550A UART emulation - * - * Copyright (c) 2003-2004 Fabrice Bellard - * Copyright (c) 2008 Citrix Systems, Inc. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "hw/char/serial.h" -#include "char/char.h" -#include "qemu/timer.h" -#include "exec/address-spaces.h" - -//#define DEBUG_SERIAL - -#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */ - -#define UART_IER_MSI 0x08 /* Enable Modem status interrupt */ -#define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */ -#define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */ -#define UART_IER_RDI 0x01 /* Enable receiver data interrupt */ - -#define UART_IIR_NO_INT 0x01 /* No interrupts pending */ -#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */ - -#define UART_IIR_MSI 0x00 /* Modem status interrupt */ -#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */ -#define UART_IIR_RDI 0x04 /* Receiver data interrupt */ -#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */ -#define UART_IIR_CTI 0x0C /* Character Timeout Indication */ - -#define UART_IIR_FENF 0x80 /* Fifo enabled, but not functionning */ -#define UART_IIR_FE 0xC0 /* Fifo enabled */ - -/* - * These are the definitions for the Modem Control Register - */ -#define UART_MCR_LOOP 0x10 /* Enable loopback test mode */ -#define UART_MCR_OUT2 0x08 /* Out2 complement */ -#define UART_MCR_OUT1 0x04 /* Out1 complement */ -#define UART_MCR_RTS 0x02 /* RTS complement */ -#define UART_MCR_DTR 0x01 /* DTR complement */ - -/* - * These are the definitions for the Modem Status Register - */ -#define UART_MSR_DCD 0x80 /* Data Carrier Detect */ -#define UART_MSR_RI 0x40 /* Ring Indicator */ -#define UART_MSR_DSR 0x20 /* Data Set Ready */ -#define UART_MSR_CTS 0x10 /* Clear to Send */ -#define UART_MSR_DDCD 0x08 /* Delta DCD */ -#define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */ -#define UART_MSR_DDSR 0x02 /* Delta DSR */ -#define UART_MSR_DCTS 0x01 /* Delta CTS */ -#define UART_MSR_ANY_DELTA 0x0F /* Any of the delta bits! */ - -#define UART_LSR_TEMT 0x40 /* Transmitter empty */ -#define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */ -#define UART_LSR_BI 0x10 /* Break interrupt indicator */ -#define UART_LSR_FE 0x08 /* Frame error indicator */ -#define UART_LSR_PE 0x04 /* Parity error indicator */ -#define UART_LSR_OE 0x02 /* Overrun error indicator */ -#define UART_LSR_DR 0x01 /* Receiver data ready */ -#define UART_LSR_INT_ANY 0x1E /* Any of the lsr-interrupt-triggering status bits */ - -/* Interrupt trigger levels. The byte-counts are for 16550A - in newer UARTs the byte-count for each ITL is higher. */ - -#define UART_FCR_ITL_1 0x00 /* 1 byte ITL */ -#define UART_FCR_ITL_2 0x40 /* 4 bytes ITL */ -#define UART_FCR_ITL_3 0x80 /* 8 bytes ITL */ -#define UART_FCR_ITL_4 0xC0 /* 14 bytes ITL */ - -#define UART_FCR_DMS 0x08 /* DMA Mode Select */ -#define UART_FCR_XFR 0x04 /* XMIT Fifo Reset */ -#define UART_FCR_RFR 0x02 /* RCVR Fifo Reset */ -#define UART_FCR_FE 0x01 /* FIFO Enable */ - -#define XMIT_FIFO 0 -#define RECV_FIFO 1 -#define MAX_XMIT_RETRY 4 - -#ifdef DEBUG_SERIAL -#define DPRINTF(fmt, ...) \ -do { fprintf(stderr, "serial: " fmt , ## __VA_ARGS__); } while (0) -#else -#define DPRINTF(fmt, ...) \ -do {} while (0) -#endif - -static void serial_receive1(void *opaque, const uint8_t *buf, int size); - -static void fifo_clear(SerialState *s, int fifo) -{ - SerialFIFO *f = (fifo) ? &s->recv_fifo : &s->xmit_fifo; - memset(f->data, 0, UART_FIFO_LENGTH); - f->count = 0; - f->head = 0; - f->tail = 0; -} - -static int fifo_put(SerialState *s, int fifo, uint8_t chr) -{ - SerialFIFO *f = (fifo) ? &s->recv_fifo : &s->xmit_fifo; - - /* Receive overruns do not overwrite FIFO contents. */ - if (fifo == XMIT_FIFO || f->count < UART_FIFO_LENGTH) { - - f->data[f->head++] = chr; - - if (f->head == UART_FIFO_LENGTH) - f->head = 0; - } - - if (f->count < UART_FIFO_LENGTH) - f->count++; - else if (fifo == RECV_FIFO) - s->lsr |= UART_LSR_OE; - - return 1; -} - -static uint8_t fifo_get(SerialState *s, int fifo) -{ - SerialFIFO *f = (fifo) ? &s->recv_fifo : &s->xmit_fifo; - uint8_t c; - - if(f->count == 0) - return 0; - - c = f->data[f->tail++]; - if (f->tail == UART_FIFO_LENGTH) - f->tail = 0; - f->count--; - - return c; -} - -static void serial_update_irq(SerialState *s) -{ - uint8_t tmp_iir = UART_IIR_NO_INT; - - if ((s->ier & UART_IER_RLSI) && (s->lsr & UART_LSR_INT_ANY)) { - tmp_iir = UART_IIR_RLSI; - } else if ((s->ier & UART_IER_RDI) && s->timeout_ipending) { - /* Note that(s->ier & UART_IER_RDI) can mask this interrupt, - * this is not in the specification but is observed on existing - * hardware. */ - tmp_iir = UART_IIR_CTI; - } else if ((s->ier & UART_IER_RDI) && (s->lsr & UART_LSR_DR) && - (!(s->fcr & UART_FCR_FE) || - s->recv_fifo.count >= s->recv_fifo.itl)) { - tmp_iir = UART_IIR_RDI; - } else if ((s->ier & UART_IER_THRI) && s->thr_ipending) { - tmp_iir = UART_IIR_THRI; - } else if ((s->ier & UART_IER_MSI) && (s->msr & UART_MSR_ANY_DELTA)) { - tmp_iir = UART_IIR_MSI; - } - - s->iir = tmp_iir | (s->iir & 0xF0); - - if (tmp_iir != UART_IIR_NO_INT) { - qemu_irq_raise(s->irq); - } else { - qemu_irq_lower(s->irq); - } -} - -static void serial_update_parameters(SerialState *s) -{ - int speed, parity, data_bits, stop_bits, frame_size; - QEMUSerialSetParams ssp; - - if (s->divider == 0) - return; - - /* Start bit. */ - frame_size = 1; - if (s->lcr & 0x08) { - /* Parity bit. */ - frame_size++; - if (s->lcr & 0x10) - parity = 'E'; - else - parity = 'O'; - } else { - parity = 'N'; - } - if (s->lcr & 0x04) - stop_bits = 2; - else - stop_bits = 1; - - data_bits = (s->lcr & 0x03) + 5; - frame_size += data_bits + stop_bits; - speed = s->baudbase / s->divider; - ssp.speed = speed; - ssp.parity = parity; - ssp.data_bits = data_bits; - ssp.stop_bits = stop_bits; - s->char_transmit_time = (get_ticks_per_sec() / speed) * frame_size; - qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp); - - DPRINTF("speed=%d parity=%c data=%d stop=%d\n", - speed, parity, data_bits, stop_bits); -} - -static void serial_update_msl(SerialState *s) -{ - uint8_t omsr; - int flags; - - qemu_del_timer(s->modem_status_poll); - - if (qemu_chr_fe_ioctl(s->chr,CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP) { - s->poll_msl = -1; - return; - } - - omsr = s->msr; - - s->msr = (flags & CHR_TIOCM_CTS) ? s->msr | UART_MSR_CTS : s->msr & ~UART_MSR_CTS; - s->msr = (flags & CHR_TIOCM_DSR) ? s->msr | UART_MSR_DSR : s->msr & ~UART_MSR_DSR; - s->msr = (flags & CHR_TIOCM_CAR) ? s->msr | UART_MSR_DCD : s->msr & ~UART_MSR_DCD; - s->msr = (flags & CHR_TIOCM_RI) ? s->msr | UART_MSR_RI : s->msr & ~UART_MSR_RI; - - if (s->msr != omsr) { - /* Set delta bits */ - s->msr = s->msr | ((s->msr >> 4) ^ (omsr >> 4)); - /* UART_MSR_TERI only if change was from 1 -> 0 */ - if ((s->msr & UART_MSR_TERI) && !(omsr & UART_MSR_RI)) - s->msr &= ~UART_MSR_TERI; - serial_update_irq(s); - } - - /* The real 16550A apparently has a 250ns response latency to line status changes. - We'll be lazy and poll only every 10ms, and only poll it at all if MSI interrupts are turned on */ - - if (s->poll_msl) - qemu_mod_timer(s->modem_status_poll, qemu_get_clock_ns(vm_clock) + get_ticks_per_sec() / 100); -} - -static gboolean serial_xmit(GIOChannel *chan, GIOCondition cond, void *opaque) -{ - SerialState *s = opaque; - - if (s->tsr_retry <= 0) { - if (s->fcr & UART_FCR_FE) { - s->tsr = fifo_get(s,XMIT_FIFO); - if (!s->xmit_fifo.count) - s->lsr |= UART_LSR_THRE; - } else if ((s->lsr & UART_LSR_THRE)) { - return FALSE; - } else { - s->tsr = s->thr; - s->lsr |= UART_LSR_THRE; - s->lsr &= ~UART_LSR_TEMT; - } - } - - if (s->mcr & UART_MCR_LOOP) { - /* in loopback mode, say that we just received a char */ - serial_receive1(s, &s->tsr, 1); - } else if (qemu_chr_fe_write(s->chr, &s->tsr, 1) != 1) { - if (s->tsr_retry >= 0 && s->tsr_retry < MAX_XMIT_RETRY && - qemu_chr_fe_add_watch(s->chr, G_IO_OUT, serial_xmit, s) > 0) { - s->tsr_retry++; - return FALSE; - } - s->tsr_retry = 0; - } else { - s->tsr_retry = 0; - } - - s->last_xmit_ts = qemu_get_clock_ns(vm_clock); - - if (s->lsr & UART_LSR_THRE) { - s->lsr |= UART_LSR_TEMT; - s->thr_ipending = 1; - serial_update_irq(s); - } - - return FALSE; -} - - -static void serial_ioport_write(void *opaque, hwaddr addr, uint64_t val, - unsigned size) -{ - SerialState *s = opaque; - - addr &= 7; - DPRINTF("write addr=0x%" HWADDR_PRIx " val=0x%" PRIx64 "\n", addr, val); - switch(addr) { - default: - case 0: - if (s->lcr & UART_LCR_DLAB) { - s->divider = (s->divider & 0xff00) | val; - serial_update_parameters(s); - } else { - s->thr = (uint8_t) val; - if(s->fcr & UART_FCR_FE) { - fifo_put(s, XMIT_FIFO, s->thr); - s->thr_ipending = 0; - s->lsr &= ~UART_LSR_TEMT; - s->lsr &= ~UART_LSR_THRE; - serial_update_irq(s); - } else { - s->thr_ipending = 0; - s->lsr &= ~UART_LSR_THRE; - serial_update_irq(s); - } - serial_xmit(NULL, G_IO_OUT, s); - } - break; - case 1: - if (s->lcr & UART_LCR_DLAB) { - s->divider = (s->divider & 0x00ff) | (val << 8); - serial_update_parameters(s); - } else { - s->ier = val & 0x0f; - /* If the backend device is a real serial port, turn polling of the modem - status lines on physical port on or off depending on UART_IER_MSI state */ - if (s->poll_msl >= 0) { - if (s->ier & UART_IER_MSI) { - s->poll_msl = 1; - serial_update_msl(s); - } else { - qemu_del_timer(s->modem_status_poll); - s->poll_msl = 0; - } - } - if (s->lsr & UART_LSR_THRE) { - s->thr_ipending = 1; - serial_update_irq(s); - } - } - break; - case 2: - val = val & 0xFF; - - if (s->fcr == val) - break; - - /* Did the enable/disable flag change? If so, make sure FIFOs get flushed */ - if ((val ^ s->fcr) & UART_FCR_FE) - val |= UART_FCR_XFR | UART_FCR_RFR; - - /* FIFO clear */ - - if (val & UART_FCR_RFR) { - qemu_del_timer(s->fifo_timeout_timer); - s->timeout_ipending=0; - fifo_clear(s,RECV_FIFO); - } - - if (val & UART_FCR_XFR) { - fifo_clear(s,XMIT_FIFO); - } - - if (val & UART_FCR_FE) { - s->iir |= UART_IIR_FE; - /* Set RECV_FIFO trigger Level */ - switch (val & 0xC0) { - case UART_FCR_ITL_1: - s->recv_fifo.itl = 1; - break; - case UART_FCR_ITL_2: - s->recv_fifo.itl = 4; - break; - case UART_FCR_ITL_3: - s->recv_fifo.itl = 8; - break; - case UART_FCR_ITL_4: - s->recv_fifo.itl = 14; - break; - } - } else - s->iir &= ~UART_IIR_FE; - - /* Set fcr - or at least the bits in it that are supposed to "stick" */ - s->fcr = val & 0xC9; - serial_update_irq(s); - break; - case 3: - { - int break_enable; - s->lcr = val; - serial_update_parameters(s); - break_enable = (val >> 6) & 1; - if (break_enable != s->last_break_enable) { - s->last_break_enable = break_enable; - qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_BREAK, - &break_enable); - } - } - break; - case 4: - { - int flags; - int old_mcr = s->mcr; - s->mcr = val & 0x1f; - if (val & UART_MCR_LOOP) - break; - - if (s->poll_msl >= 0 && old_mcr != s->mcr) { - - qemu_chr_fe_ioctl(s->chr,CHR_IOCTL_SERIAL_GET_TIOCM, &flags); - - flags &= ~(CHR_TIOCM_RTS | CHR_TIOCM_DTR); - - if (val & UART_MCR_RTS) - flags |= CHR_TIOCM_RTS; - if (val & UART_MCR_DTR) - flags |= CHR_TIOCM_DTR; - - qemu_chr_fe_ioctl(s->chr,CHR_IOCTL_SERIAL_SET_TIOCM, &flags); - /* Update the modem status after a one-character-send wait-time, since there may be a response - from the device/computer at the other end of the serial line */ - qemu_mod_timer(s->modem_status_poll, qemu_get_clock_ns(vm_clock) + s->char_transmit_time); - } - } - break; - case 5: - break; - case 6: - break; - case 7: - s->scr = val; - break; - } -} - -static uint64_t serial_ioport_read(void *opaque, hwaddr addr, unsigned size) -{ - SerialState *s = opaque; - uint32_t ret; - - addr &= 7; - switch(addr) { - default: - case 0: - if (s->lcr & UART_LCR_DLAB) { - ret = s->divider & 0xff; - } else { - if(s->fcr & UART_FCR_FE) { - ret = fifo_get(s,RECV_FIFO); - if (s->recv_fifo.count == 0) - s->lsr &= ~(UART_LSR_DR | UART_LSR_BI); - else - qemu_mod_timer(s->fifo_timeout_timer, qemu_get_clock_ns (vm_clock) + s->char_transmit_time * 4); - s->timeout_ipending = 0; - } else { - ret = s->rbr; - s->lsr &= ~(UART_LSR_DR | UART_LSR_BI); - } - serial_update_irq(s); - if (!(s->mcr & UART_MCR_LOOP)) { - /* in loopback mode, don't receive any data */ - qemu_chr_accept_input(s->chr); - } - } - break; - case 1: - if (s->lcr & UART_LCR_DLAB) { - ret = (s->divider >> 8) & 0xff; - } else { - ret = s->ier; - } - break; - case 2: - ret = s->iir; - if ((ret & UART_IIR_ID) == UART_IIR_THRI) { - s->thr_ipending = 0; - serial_update_irq(s); - } - break; - case 3: - ret = s->lcr; - break; - case 4: - ret = s->mcr; - break; - case 5: - ret = s->lsr; - /* Clear break and overrun interrupts */ - if (s->lsr & (UART_LSR_BI|UART_LSR_OE)) { - s->lsr &= ~(UART_LSR_BI|UART_LSR_OE); - serial_update_irq(s); - } - break; - case 6: - if (s->mcr & UART_MCR_LOOP) { - /* in loopback, the modem output pins are connected to the - inputs */ - ret = (s->mcr & 0x0c) << 4; - ret |= (s->mcr & 0x02) << 3; - ret |= (s->mcr & 0x01) << 5; - } else { - if (s->poll_msl >= 0) - serial_update_msl(s); - ret = s->msr; - /* Clear delta bits & msr int after read, if they were set */ - if (s->msr & UART_MSR_ANY_DELTA) { - s->msr &= 0xF0; - serial_update_irq(s); - } - } - break; - case 7: - ret = s->scr; - break; - } - DPRINTF("read addr=0x%" HWADDR_PRIx " val=0x%02x\n", addr, ret); - return ret; -} - -static int serial_can_receive(SerialState *s) -{ - if(s->fcr & UART_FCR_FE) { - if(s->recv_fifo.count < UART_FIFO_LENGTH) - /* Advertise (fifo.itl - fifo.count) bytes when count < ITL, and 1 if above. If UART_FIFO_LENGTH - fifo.count is - advertised the effect will be to almost always fill the fifo completely before the guest has a chance to respond, - effectively overriding the ITL that the guest has set. */ - return (s->recv_fifo.count <= s->recv_fifo.itl) ? s->recv_fifo.itl - s->recv_fifo.count : 1; - else - return 0; - } else { - return !(s->lsr & UART_LSR_DR); - } -} - -static void serial_receive_break(SerialState *s) -{ - s->rbr = 0; - /* When the LSR_DR is set a null byte is pushed into the fifo */ - fifo_put(s, RECV_FIFO, '\0'); - s->lsr |= UART_LSR_BI | UART_LSR_DR; - serial_update_irq(s); -} - -/* There's data in recv_fifo and s->rbr has not been read for 4 char transmit times */ -static void fifo_timeout_int (void *opaque) { - SerialState *s = opaque; - if (s->recv_fifo.count) { - s->timeout_ipending = 1; - serial_update_irq(s); - } -} - -static int serial_can_receive1(void *opaque) -{ - SerialState *s = opaque; - return serial_can_receive(s); -} - -static void serial_receive1(void *opaque, const uint8_t *buf, int size) -{ - SerialState *s = opaque; - - if (s->wakeup) { - qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); - } - if(s->fcr & UART_FCR_FE) { - int i; - for (i = 0; i < size; i++) { - fifo_put(s, RECV_FIFO, buf[i]); - } - s->lsr |= UART_LSR_DR; - /* call the timeout receive callback in 4 char transmit time */ - qemu_mod_timer(s->fifo_timeout_timer, qemu_get_clock_ns (vm_clock) + s->char_transmit_time * 4); - } else { - if (s->lsr & UART_LSR_DR) - s->lsr |= UART_LSR_OE; - s->rbr = buf[0]; - s->lsr |= UART_LSR_DR; - } - serial_update_irq(s); -} - -static void serial_event(void *opaque, int event) -{ - SerialState *s = opaque; - DPRINTF("event %x\n", event); - if (event == CHR_EVENT_BREAK) - serial_receive_break(s); -} - -static void serial_pre_save(void *opaque) -{ - SerialState *s = opaque; - s->fcr_vmstate = s->fcr; -} - -static int serial_post_load(void *opaque, int version_id) -{ - SerialState *s = opaque; - - if (version_id < 3) { - s->fcr_vmstate = 0; - } - /* Initialize fcr via setter to perform essential side-effects */ - serial_ioport_write(s, 0x02, s->fcr_vmstate, 1); - serial_update_parameters(s); - return 0; -} - -const VMStateDescription vmstate_serial = { - .name = "serial", - .version_id = 3, - .minimum_version_id = 2, - .pre_save = serial_pre_save, - .post_load = serial_post_load, - .fields = (VMStateField []) { - VMSTATE_UINT16_V(divider, SerialState, 2), - VMSTATE_UINT8(rbr, SerialState), - VMSTATE_UINT8(ier, SerialState), - VMSTATE_UINT8(iir, SerialState), - VMSTATE_UINT8(lcr, SerialState), - VMSTATE_UINT8(mcr, SerialState), - VMSTATE_UINT8(lsr, SerialState), - VMSTATE_UINT8(msr, SerialState), - VMSTATE_UINT8(scr, SerialState), - VMSTATE_UINT8_V(fcr_vmstate, SerialState, 3), - VMSTATE_END_OF_LIST() - } -}; - -static void serial_reset(void *opaque) -{ - SerialState *s = opaque; - - s->rbr = 0; - s->ier = 0; - s->iir = UART_IIR_NO_INT; - s->lcr = 0; - s->lsr = UART_LSR_TEMT | UART_LSR_THRE; - s->msr = UART_MSR_DCD | UART_MSR_DSR | UART_MSR_CTS; - /* Default to 9600 baud, 1 start bit, 8 data bits, 1 stop bit, no parity. */ - s->divider = 0x0C; - s->mcr = UART_MCR_OUT2; - s->scr = 0; - s->tsr_retry = 0; - s->char_transmit_time = (get_ticks_per_sec() / 9600) * 10; - s->poll_msl = 0; - - fifo_clear(s,RECV_FIFO); - fifo_clear(s,XMIT_FIFO); - - s->last_xmit_ts = qemu_get_clock_ns(vm_clock); - - s->thr_ipending = 0; - s->last_break_enable = 0; - qemu_irq_lower(s->irq); -} - -void serial_init_core(SerialState *s) -{ - if (!s->chr) { - fprintf(stderr, "Can't create serial device, empty char device\n"); - exit(1); - } - - s->modem_status_poll = qemu_new_timer_ns(vm_clock, (QEMUTimerCB *) serial_update_msl, s); - - s->fifo_timeout_timer = qemu_new_timer_ns(vm_clock, (QEMUTimerCB *) fifo_timeout_int, s); - qemu_register_reset(serial_reset, s); - - qemu_chr_add_handlers(s->chr, serial_can_receive1, serial_receive1, - 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); -} - -/* Change the main reference oscillator frequency. */ -void serial_set_frequency(SerialState *s, uint32_t frequency) -{ - s->baudbase = frequency; - serial_update_parameters(s); -} - -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, - CharDriverState *chr, MemoryRegion *system_io) -{ - SerialState *s; - - s = g_malloc0(sizeof(SerialState)); - - s->irq = irq; - s->baudbase = baudbase; - s->chr = chr; - serial_init_core(s); - - vmstate_register(NULL, base, &vmstate_serial, s); - - memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8); - memory_region_add_subregion(system_io, base, &s->io); - - return s; -} - -/* Memory mapped interface */ -static uint64_t serial_mm_read(void *opaque, hwaddr addr, - unsigned size) -{ - SerialState *s = opaque; - return serial_ioport_read(s, addr >> s->it_shift, 1); -} - -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, 1); -} - -static const MemoryRegionOps serial_mm_ops[3] = { - [DEVICE_NATIVE_ENDIAN] = { - .read = serial_mm_read, - .write = serial_mm_write, - .endianness = DEVICE_NATIVE_ENDIAN, - }, - [DEVICE_LITTLE_ENDIAN] = { - .read = serial_mm_read, - .write = serial_mm_write, - .endianness = DEVICE_LITTLE_ENDIAN, - }, - [DEVICE_BIG_ENDIAN] = { - .read = serial_mm_read, - .write = serial_mm_write, - .endianness = DEVICE_BIG_ENDIAN, - }, -}; - -SerialState *serial_mm_init(MemoryRegion *address_space, - hwaddr base, int it_shift, - qemu_irq irq, int baudbase, - CharDriverState *chr, enum device_endian end) -{ - SerialState *s; - - s = g_malloc0(sizeof(SerialState)); - - s->it_shift = it_shift; - s->irq = irq; - s->baudbase = baudbase; - s->chr = chr; - - serial_init_core(s); - vmstate_register(NULL, base, &vmstate_serial, s); - - memory_region_init_io(&s->io, &serial_mm_ops[end], s, - "serial", 8 << it_shift); - memory_region_add_subregion(address_space, base, &s->io); - - serial_update_msl(s); - return s; -} |