mirror of https://gitee.com/openkylin/qemu.git
506 lines
12 KiB
C
506 lines
12 KiB
C
/*
|
|
* QEMU Sparc SLAVIO serial port emulation
|
|
*
|
|
* Copyright (c) 2003-2005 Fabrice Bellard
|
|
*
|
|
* 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 "vl.h"
|
|
/* debug serial */
|
|
//#define DEBUG_SERIAL
|
|
|
|
/* debug keyboard */
|
|
//#define DEBUG_KBD
|
|
|
|
/* debug mouse */
|
|
//#define DEBUG_MOUSE
|
|
|
|
/*
|
|
* This is the serial port, mouse and keyboard part of chip STP2001
|
|
* (Slave I/O), also produced as NCR89C105. See
|
|
* http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
|
|
*
|
|
* The serial ports implement full AMD AM8530 or Zilog Z8530 chips,
|
|
* mouse and keyboard ports don't implement all functions and they are
|
|
* only asynchronous. There is no DMA.
|
|
*
|
|
*/
|
|
|
|
#ifdef DEBUG_SERIAL
|
|
#define SER_DPRINTF(fmt, args...) \
|
|
do { printf("SER: " fmt , ##args); } while (0)
|
|
#else
|
|
#define SER_DPRINTF(fmt, args...)
|
|
#endif
|
|
#ifdef DEBUG_KBD
|
|
#define KBD_DPRINTF(fmt, args...) \
|
|
do { printf("KBD: " fmt , ##args); } while (0)
|
|
#else
|
|
#define KBD_DPRINTF(fmt, args...)
|
|
#endif
|
|
#ifdef DEBUG_MOUSE
|
|
#define MS_DPRINTF(fmt, args...) \
|
|
do { printf("SER: " fmt , ##args); } while (0)
|
|
#else
|
|
#define MS_DPRINTF(fmt, args...)
|
|
#endif
|
|
|
|
typedef enum {
|
|
chn_a, chn_b,
|
|
} chn_id_t;
|
|
|
|
typedef enum {
|
|
ser, kbd, mouse,
|
|
} chn_type_t;
|
|
|
|
#define KBD_QUEUE_SIZE 256
|
|
|
|
typedef struct {
|
|
uint8_t data[KBD_QUEUE_SIZE];
|
|
int rptr, wptr, count;
|
|
} KBDQueue;
|
|
|
|
typedef struct ChannelState {
|
|
int irq;
|
|
int reg;
|
|
int rxint, txint;
|
|
chn_id_t chn; // this channel, A (base+4) or B (base+0)
|
|
chn_type_t type;
|
|
struct ChannelState *otherchn;
|
|
uint8_t rx, tx, wregs[16], rregs[16];
|
|
KBDQueue queue;
|
|
CharDriverState *chr;
|
|
} ChannelState;
|
|
|
|
struct SerialState {
|
|
struct ChannelState chn[2];
|
|
};
|
|
|
|
#define SERIAL_MAXADDR 7
|
|
|
|
static void handle_kbd_command(ChannelState *s, int val);
|
|
static int serial_can_receive(void *opaque);
|
|
static void serial_receive_byte(ChannelState *s, int ch);
|
|
|
|
static void put_queue(void *opaque, int b)
|
|
{
|
|
ChannelState *s = opaque;
|
|
KBDQueue *q = &s->queue;
|
|
|
|
KBD_DPRINTF("put: 0x%02x\n", b);
|
|
if (q->count >= KBD_QUEUE_SIZE)
|
|
return;
|
|
q->data[q->wptr] = b;
|
|
if (++q->wptr == KBD_QUEUE_SIZE)
|
|
q->wptr = 0;
|
|
q->count++;
|
|
serial_receive_byte(s, 0);
|
|
}
|
|
|
|
static uint32_t get_queue(void *opaque)
|
|
{
|
|
ChannelState *s = opaque;
|
|
KBDQueue *q = &s->queue;
|
|
int val;
|
|
|
|
if (q->count == 0) {
|
|
return 0;
|
|
} else {
|
|
val = q->data[q->rptr];
|
|
if (++q->rptr == KBD_QUEUE_SIZE)
|
|
q->rptr = 0;
|
|
q->count--;
|
|
}
|
|
KBD_DPRINTF("get 0x%02x\n", val);
|
|
if (q->count > 0)
|
|
serial_receive_byte(s, 0);
|
|
return val;
|
|
}
|
|
|
|
static void slavio_serial_update_irq(ChannelState *s)
|
|
{
|
|
if ((s->wregs[1] & 1) && // interrupts enabled
|
|
(((s->wregs[1] & 2) && s->txint == 1) || // tx ints enabled, pending
|
|
((((s->wregs[1] & 0x18) == 8) || ((s->wregs[1] & 0x18) == 0x10)) &&
|
|
s->rxint == 1) || // rx ints enabled, pending
|
|
((s->wregs[15] & 0x80) && (s->rregs[0] & 0x80)))) { // break int e&p
|
|
pic_set_irq(s->irq, 1);
|
|
} else {
|
|
pic_set_irq(s->irq, 0);
|
|
}
|
|
}
|
|
|
|
static void slavio_serial_reset_chn(ChannelState *s)
|
|
{
|
|
int i;
|
|
|
|
s->reg = 0;
|
|
for (i = 0; i < SERIAL_MAXADDR; i++) {
|
|
s->rregs[i] = 0;
|
|
s->wregs[i] = 0;
|
|
}
|
|
s->wregs[4] = 4;
|
|
s->wregs[9] = 0xc0;
|
|
s->wregs[11] = 8;
|
|
s->wregs[14] = 0x30;
|
|
s->wregs[15] = 0xf8;
|
|
s->rregs[0] = 0x44;
|
|
s->rregs[1] = 6;
|
|
|
|
s->rx = s->tx = 0;
|
|
s->rxint = s->txint = 0;
|
|
}
|
|
|
|
static void slavio_serial_reset(void *opaque)
|
|
{
|
|
SerialState *s = opaque;
|
|
slavio_serial_reset_chn(&s->chn[0]);
|
|
slavio_serial_reset_chn(&s->chn[1]);
|
|
}
|
|
|
|
static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
|
|
{
|
|
SerialState *ser = opaque;
|
|
ChannelState *s;
|
|
uint32_t saddr;
|
|
int newreg, channel;
|
|
|
|
val &= 0xff;
|
|
saddr = (addr & 3) >> 1;
|
|
channel = (addr & SERIAL_MAXADDR) >> 2;
|
|
s = &ser->chn[channel];
|
|
switch (saddr) {
|
|
case 0:
|
|
SER_DPRINTF("Write channel %c, reg[%d] = %2.2x\n", channel? 'b' : 'a', s->reg, val & 0xff);
|
|
newreg = 0;
|
|
switch (s->reg) {
|
|
case 0:
|
|
newreg = val & 7;
|
|
val &= 0x38;
|
|
switch (val) {
|
|
case 8:
|
|
s->reg |= 0x8;
|
|
break;
|
|
case 0x20:
|
|
s->rxint = 0;
|
|
break;
|
|
case 0x28:
|
|
s->txint = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case 1 ... 8:
|
|
case 10 ... 15:
|
|
s->wregs[s->reg] = val;
|
|
break;
|
|
case 9:
|
|
switch (val & 0xc0) {
|
|
case 0:
|
|
default:
|
|
break;
|
|
case 0x40:
|
|
slavio_serial_reset_chn(&ser->chn[1]);
|
|
return;
|
|
case 0x80:
|
|
slavio_serial_reset_chn(&ser->chn[0]);
|
|
return;
|
|
case 0xc0:
|
|
slavio_serial_reset(ser);
|
|
return;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (s->reg == 0)
|
|
s->reg = newreg;
|
|
else
|
|
s->reg = 0;
|
|
break;
|
|
case 1:
|
|
SER_DPRINTF("Write channel %c, ch %d\n", channel? 'b' : 'a', val);
|
|
if (s->wregs[5] & 8) { // tx enabled
|
|
s->tx = val;
|
|
if (s->chr)
|
|
qemu_chr_write(s->chr, &s->tx, 1);
|
|
else if (s->type == kbd) {
|
|
handle_kbd_command(s, val);
|
|
}
|
|
s->txint = 1;
|
|
s->rregs[0] |= 4;
|
|
// Interrupts reported only on channel A
|
|
if (s->chn == 0)
|
|
s->rregs[3] |= 0x10;
|
|
else {
|
|
s->otherchn->rregs[3] |= 2;
|
|
}
|
|
slavio_serial_update_irq(s);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static uint32_t slavio_serial_mem_readb(void *opaque, target_phys_addr_t addr)
|
|
{
|
|
SerialState *ser = opaque;
|
|
ChannelState *s;
|
|
uint32_t saddr;
|
|
uint32_t ret;
|
|
int channel;
|
|
|
|
saddr = (addr & 3) >> 1;
|
|
channel = (addr & SERIAL_MAXADDR) >> 2;
|
|
s = &ser->chn[channel];
|
|
switch (saddr) {
|
|
case 0:
|
|
SER_DPRINTF("Read channel %c, reg[%d] = %2.2x\n", channel? 'b' : 'a', s->reg, s->rregs[s->reg]);
|
|
ret = s->rregs[s->reg];
|
|
s->reg = 0;
|
|
return ret;
|
|
case 1:
|
|
SER_DPRINTF("Read channel %c, ch %d\n", channel? 'b' : 'a', s->rx);
|
|
s->rregs[0] &= ~1;
|
|
if (s->type == kbd)
|
|
ret = get_queue(s);
|
|
else
|
|
ret = s->rx;
|
|
return ret;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int serial_can_receive(void *opaque)
|
|
{
|
|
ChannelState *s = opaque;
|
|
if (((s->wregs[3] & 1) == 0) // Rx not enabled
|
|
|| ((s->rregs[0] & 1) == 1)) // char already available
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
static void serial_receive_byte(ChannelState *s, int ch)
|
|
{
|
|
s->rregs[0] |= 1;
|
|
// Interrupts reported only on channel A
|
|
if (s->chn == 0)
|
|
s->rregs[3] |= 0x20;
|
|
else {
|
|
s->otherchn->rregs[3] |= 4;
|
|
}
|
|
s->rx = ch;
|
|
s->rxint = 1;
|
|
slavio_serial_update_irq(s);
|
|
}
|
|
|
|
static void serial_receive_break(ChannelState *s)
|
|
{
|
|
s->rregs[0] |= 0x80;
|
|
slavio_serial_update_irq(s);
|
|
}
|
|
|
|
static void serial_receive1(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
ChannelState *s = opaque;
|
|
serial_receive_byte(s, buf[0]);
|
|
}
|
|
|
|
static void serial_event(void *opaque, int event)
|
|
{
|
|
ChannelState *s = opaque;
|
|
if (event == CHR_EVENT_BREAK)
|
|
serial_receive_break(s);
|
|
}
|
|
|
|
static CPUReadMemoryFunc *slavio_serial_mem_read[3] = {
|
|
slavio_serial_mem_readb,
|
|
slavio_serial_mem_readb,
|
|
slavio_serial_mem_readb,
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *slavio_serial_mem_write[3] = {
|
|
slavio_serial_mem_writeb,
|
|
slavio_serial_mem_writeb,
|
|
slavio_serial_mem_writeb,
|
|
};
|
|
|
|
static void slavio_serial_save_chn(QEMUFile *f, ChannelState *s)
|
|
{
|
|
qemu_put_be32s(f, &s->irq);
|
|
qemu_put_be32s(f, &s->reg);
|
|
qemu_put_be32s(f, &s->rxint);
|
|
qemu_put_be32s(f, &s->txint);
|
|
qemu_put_8s(f, &s->rx);
|
|
qemu_put_8s(f, &s->tx);
|
|
qemu_put_buffer(f, s->wregs, 16);
|
|
qemu_put_buffer(f, s->rregs, 16);
|
|
}
|
|
|
|
static void slavio_serial_save(QEMUFile *f, void *opaque)
|
|
{
|
|
SerialState *s = opaque;
|
|
|
|
slavio_serial_save_chn(f, &s->chn[0]);
|
|
slavio_serial_save_chn(f, &s->chn[1]);
|
|
}
|
|
|
|
static int slavio_serial_load_chn(QEMUFile *f, ChannelState *s, int version_id)
|
|
{
|
|
if (version_id != 1)
|
|
return -EINVAL;
|
|
|
|
qemu_get_be32s(f, &s->irq);
|
|
qemu_get_be32s(f, &s->reg);
|
|
qemu_get_be32s(f, &s->rxint);
|
|
qemu_get_be32s(f, &s->txint);
|
|
qemu_get_8s(f, &s->rx);
|
|
qemu_get_8s(f, &s->tx);
|
|
qemu_get_buffer(f, s->wregs, 16);
|
|
qemu_get_buffer(f, s->rregs, 16);
|
|
return 0;
|
|
}
|
|
|
|
static int slavio_serial_load(QEMUFile *f, void *opaque, int version_id)
|
|
{
|
|
SerialState *s = opaque;
|
|
int ret;
|
|
|
|
ret = slavio_serial_load_chn(f, &s->chn[0], version_id);
|
|
if (ret != 0)
|
|
return ret;
|
|
ret = slavio_serial_load_chn(f, &s->chn[1], version_id);
|
|
return ret;
|
|
|
|
}
|
|
|
|
SerialState *slavio_serial_init(int base, int irq, CharDriverState *chr1, CharDriverState *chr2)
|
|
{
|
|
int slavio_serial_io_memory, i;
|
|
SerialState *s;
|
|
|
|
s = qemu_mallocz(sizeof(SerialState));
|
|
if (!s)
|
|
return NULL;
|
|
|
|
slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, slavio_serial_mem_write, s);
|
|
cpu_register_physical_memory(base, SERIAL_MAXADDR, slavio_serial_io_memory);
|
|
|
|
s->chn[0].chr = chr1;
|
|
s->chn[1].chr = chr2;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
s->chn[i].irq = irq;
|
|
s->chn[i].chn = 1 - i;
|
|
s->chn[i].type = ser;
|
|
if (s->chn[i].chr) {
|
|
qemu_chr_add_read_handler(s->chn[i].chr, serial_can_receive, serial_receive1, &s->chn[i]);
|
|
qemu_chr_add_event_handler(s->chn[i].chr, serial_event);
|
|
}
|
|
}
|
|
s->chn[0].otherchn = &s->chn[1];
|
|
s->chn[1].otherchn = &s->chn[0];
|
|
register_savevm("slavio_serial", base, 1, slavio_serial_save, slavio_serial_load, s);
|
|
qemu_register_reset(slavio_serial_reset, s);
|
|
slavio_serial_reset(s);
|
|
return s;
|
|
}
|
|
|
|
static const uint8_t keycodes[128] = {
|
|
127, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 53,
|
|
54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 89, 76, 77, 78,
|
|
79, 80, 81, 82, 83, 84, 85, 86, 87, 42, 99, 88, 100, 101, 102, 103,
|
|
104, 105, 106, 107, 108, 109, 110, 47, 19, 121, 119, 5, 6, 8, 10, 12,
|
|
14, 16, 17, 18, 7, 98, 23, 68, 69, 70, 71, 91, 92, 93, 125, 112,
|
|
113, 114, 94, 50, 0, 0, 124, 9, 11, 0, 0, 0, 0, 0, 0, 0,
|
|
90, 0, 46, 22, 13, 111, 52, 20, 96, 24, 28, 74, 27, 123, 44, 66,
|
|
0, 45, 2, 4, 48, 0, 0, 21, 0, 0, 0, 0, 0, 120, 122, 67,
|
|
};
|
|
|
|
static void sunkbd_event(void *opaque, int ch)
|
|
{
|
|
ChannelState *s = opaque;
|
|
int release = ch & 0x80;
|
|
|
|
ch = keycodes[ch & 0x7f];
|
|
KBD_DPRINTF("Keycode %d (%s)\n", ch, release? "release" : "press");
|
|
put_queue(s, ch | release);
|
|
}
|
|
|
|
static void handle_kbd_command(ChannelState *s, int val)
|
|
{
|
|
KBD_DPRINTF("Command %d\n", val);
|
|
switch (val) {
|
|
case 1: // Reset, return type code
|
|
put_queue(s, 0xff);
|
|
put_queue(s, 0xff);
|
|
put_queue(s, 5); // Type 5
|
|
break;
|
|
case 7: // Query layout
|
|
put_queue(s, 0xfe);
|
|
put_queue(s, 0x20); // XXX, layout?
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void sunmouse_event(void *opaque,
|
|
int dx, int dy, int dz, int buttons_state)
|
|
{
|
|
ChannelState *s = opaque;
|
|
int ch;
|
|
|
|
// XXX
|
|
ch = 0x42;
|
|
serial_receive_byte(s, ch);
|
|
}
|
|
|
|
void slavio_serial_ms_kbd_init(int base, int irq)
|
|
{
|
|
int slavio_serial_io_memory, i;
|
|
SerialState *s;
|
|
|
|
s = qemu_mallocz(sizeof(SerialState));
|
|
if (!s)
|
|
return;
|
|
for (i = 0; i < 2; i++) {
|
|
s->chn[i].irq = irq;
|
|
s->chn[i].chn = 1 - i;
|
|
s->chn[i].chr = NULL;
|
|
}
|
|
s->chn[0].otherchn = &s->chn[1];
|
|
s->chn[1].otherchn = &s->chn[0];
|
|
s->chn[0].type = mouse;
|
|
s->chn[1].type = kbd;
|
|
|
|
slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read, slavio_serial_mem_write, s);
|
|
cpu_register_physical_memory(base, SERIAL_MAXADDR, slavio_serial_io_memory);
|
|
|
|
qemu_add_mouse_event_handler(sunmouse_event, &s->chn[0]);
|
|
qemu_add_kbd_event_handler(sunkbd_event, &s->chn[1]);
|
|
qemu_register_reset(slavio_serial_reset, s);
|
|
slavio_serial_reset(s);
|
|
}
|