On Thu, 27 Jan 2022 at 21:03, Mark Cave-Ayland
<mark.cave-ayl...@ilande.co.uk> wrote:
>
> This displays detailed information about the device registers and timers to
> aid
> debugging problems with timers and interrupts.
>
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>
> ---
> hmp-commands-info.hx | 12 ++++++
> hw/misc/mos6522.c | 92 ++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 104 insertions(+)
I'm not sure how keen we are on adding new device-specific
HMP info commands, but it's not my area of expertise. Markus ?
(patch below for context)
thanks
-- PMM
>
> diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx
> index e90f20a107..4e714e79a2 100644
> --- a/hmp-commands-info.hx
> +++ b/hmp-commands-info.hx
> @@ -879,3 +879,15 @@ SRST
> ``info sgx``
> Show intel SGX information.
> ERST
> +
> + {
> + .name = "via",
> + .args_type = "",
> + .params = "",
> + .help = "show guest 6522 VIA devices",
> + },
> +
> +SRST
> + ``info via``
> + Show guest 6522 VIA devices.
> +ERST
> diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c
> index aaae195d63..cfa6a9c44b 100644
> --- a/hw/misc/mos6522.c
> +++ b/hw/misc/mos6522.c
> @@ -30,6 +30,8 @@
> #include "hw/misc/mos6522.h"
> #include "hw/qdev-properties.h"
> #include "migration/vmstate.h"
> +#include "monitor/monitor.h"
> +#include "qapi/type-helpers.h"
> #include "qemu/timer.h"
> #include "qemu/cutils.h"
> #include "qemu/log.h"
> @@ -415,6 +417,95 @@ void mos6522_write(void *opaque, hwaddr addr, uint64_t
> val, unsigned size)
> }
> }
>
> +static int qmp_x_query_via_foreach(Object *obj, void *opaque)
> +{
> + GString *buf = opaque;
> +
> + if (object_dynamic_cast(obj, TYPE_MOS6522)) {
> + MOS6522State *s = MOS6522(obj);
> + int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
> + uint16_t t1counter = get_counter(s, &s->timers[0]);
> + uint16_t t2counter = get_counter(s, &s->timers[1]);
> +
> + g_string_append_printf(buf, "%s:\n", object_get_typename(obj));
> +
> + g_string_append_printf(buf, " Registers:\n");
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[0], s->b);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[1], s->a);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[2], s->dirb);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[3], s->dira);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[4], t1counter & 0xff);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[5], t1counter >> 8);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[6],
> + s->timers[0].latch & 0xff);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[7],
> + s->timers[0].latch >> 8);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[8], t2counter & 0xff);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[9], t2counter >> 8);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[10], s->sr);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[11], s->acr);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[12], s->pcr);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[13], s->ifr);
> + g_string_append_printf(buf, " %-*s: 0x%x\n", 4,
> + mos6522_reg_names[14], s->ier);
> +
> + g_string_append_printf(buf, " Timers:\n");
> + g_string_append_printf(buf, " Using current time now(ns)=%"PRId64
> + "\n", now);
> + g_string_append_printf(buf, " T1 freq(hz)=%"PRId64
> + " mode=%s"
> + " counter=0x%x"
> + " latch=0x%x\n"
> + " load_time(ns)=%"PRId64
> + " next_irq_time(ns)=%"PRId64 "\n",
> + s->timers[0].frequency,
> + ((s->acr & T1MODE) == T1MODE_CONT) ?
> "continuous"
> + :
> "one-shot",
> + t1counter,
> + s->timers[0].latch,
> + s->timers[0].load_time,
> + get_next_irq_time(s, &s->timers[0], now));
> + g_string_append_printf(buf, " T2 freq(hz)=%"PRId64
> + " mode=%s"
> + " counter=0x%x"
> + " latch=0x%x\n"
> + " load_time(ns)=%"PRId64
> + " next_irq_time(ns)=%"PRId64 "\n",
> + s->timers[1].frequency,
> + "one-shot",
> + t2counter,
> + s->timers[1].latch,
> + s->timers[1].load_time,
> + get_next_irq_time(s, &s->timers[1], now));
> + }
> +
> + return 0;
> +}
> +
> +static HumanReadableText *qmp_x_query_via(Error **errp)
> +{
> + g_autoptr(GString) buf = g_string_new("");
> +
> + object_child_foreach_recursive(object_get_root(),
> + qmp_x_query_via_foreach, buf);
> +
> + return human_readable_text_from_str(buf);
> +}
> +
> static const MemoryRegionOps mos6522_ops = {
> .read = mos6522_read,
> .write = mos6522_write,
> @@ -547,6 +638,7 @@ static const TypeInfo mos6522_type_info = {
> static void mos6522_register_types(void)
> {
> type_register_static(&mos6522_type_info);
> + monitor_register_hmp_info_hrt("via", qmp_x_query_via);
> }
>
> type_init(mos6522_register_types)
> --
> 2.20.1
