diff options
Diffstat (limited to 'hw/char/sh_serial.c')
| -rw-r--r-- | hw/char/sh_serial.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/hw/char/sh_serial.c b/hw/char/sh_serial.c index 373a40595f..12831561a6 100644 --- a/hw/char/sh_serial.c +++ b/hw/char/sh_serial.c @@ -29,6 +29,7 @@ #include "hw/sh4/sh.h" #include "chardev/char-fe.h" #include "qapi/error.h" +#include "qemu/timer.h" //#define DEBUG_SERIAL @@ -63,6 +64,8 @@ typedef struct { int rtrg; CharBackend chr; + QEMUTimer *fifo_timeout_timer; + uint64_t etu; /* Elementary Time Unit (ns) */ qemu_irq eri; qemu_irq rxi; @@ -314,6 +317,16 @@ static int sh_serial_can_receive1(void *opaque) return sh_serial_can_receive(s); } +static void sh_serial_timeout_int(void *opaque) +{ + sh_serial_state *s = opaque; + + s->flags |= SH_SERIAL_FLAG_RDF; + if (s->scr & (1 << 6) && s->rxi) { + qemu_set_irq(s->rxi, 1); + } +} + static void sh_serial_receive1(void *opaque, const uint8_t *buf, int size) { sh_serial_state *s = opaque; @@ -330,8 +343,12 @@ static void sh_serial_receive1(void *opaque, const uint8_t *buf, int size) if (s->rx_cnt >= s->rtrg) { s->flags |= SH_SERIAL_FLAG_RDF; if (s->scr & (1 << 6) && s->rxi) { + timer_del(s->fifo_timeout_timer); qemu_set_irq(s->rxi, 1); } + } else { + timer_mod(s->fifo_timeout_timer, + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 15 * s->etu); } } } @@ -402,6 +419,9 @@ void sh_serial_init(MemoryRegion *sysmem, sh_serial_event, NULL, s, NULL, true); } + s->fifo_timeout_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, + sh_serial_timeout_int, s); + s->etu = NANOSECONDS_PER_SECOND / 9600; s->eri = eri_source; s->rxi = rxi_source; s->txi = txi_source; |