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Pull request Q800 20211022 

GLUE updates for A/UX mode
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Merge remote-tracking branch 'remotes/vivier-m68k/tags/q800-pull-request' into staging

Pull request Q800 20211022

GLUE updates for A/UX mode

# gpg: Signature made Fri 22 Oct 2021 12:16:29 AM PDT
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]

* remotes/vivier-m68k/tags/q800-pull-request:
  q800: drop 8-bit graphic_depth check for Apple 21 inch display
  q800: add NMI handler
  q800: wire up remaining IRQs in classic mode
  q800: route SONIC on-board Ethernet IRQ via nubus IRQ 9 in classic mode
  q800: wire up auxmode GPIO to GLUE
  mac_via: add GPIO for A/UX mode
  q800: use GLUE IRQ numbers instead of IRQ level for GLUE IRQs
  q800: move VIA1 IRQ from level 1 to level 6
  mac_via: update comment for VIA1B_vMystery bit

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-10-22 07:47:13 -07:00
parent 4c127fdbe8 a56c12fb76
commit 1dafe7656a
4 changed files with 189 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

169
hw/m68k/q800.c
View File

@ -28,6 +28,7 @@
#include "cpu.h"
#include "hw/boards.h"
#include "hw/or-irq.h"
#include "hw/nmi.h"
#include "elf.h"
#include "hw/loader.h"
#include "ui/console.h"
@ -100,13 +101,110 @@ struct GLUEState {
SysBusDevice parent_obj;
M68kCPU *cpu;
uint8_t ipr;
uint8_t auxmode;
qemu_irq irqs[1];
QEMUTimer *nmi_release;
};
#define GLUE_IRQ_IN_VIA1 0
#define GLUE_IRQ_IN_VIA2 1
#define GLUE_IRQ_IN_SONIC 2
#define GLUE_IRQ_IN_ESCC 3
#define GLUE_IRQ_IN_NMI 4
#define GLUE_IRQ_NUBUS_9 0
/*
* The GLUE logic on the Quadra 800 supports 2 different IRQ routing modes
* controlled from the VIA1 auxmode GPIO (port B bit 6) which are documented
* in NetBSD as follows:
*
* A/UX mode (Linux, NetBSD, auxmode GPIO low)
*
* Level 0: Spurious: ignored
* Level 1: Software
* Level 2: VIA2 (except ethernet, sound)
* Level 3: Ethernet
* Level 4: Serial (SCC)
* Level 5: Sound
* Level 6: VIA1
* Level 7: NMIs: parity errors, RESET button, YANCC error
*
* Classic mode (default: used by MacOS, A/UX 3.0.1, auxmode GPIO high)
*
* Level 0: Spurious: ignored
* Level 1: VIA1 (clock, ADB)
* Level 2: VIA2 (NuBus, SCSI)
* Level 3:
* Level 4: Serial (SCC)
* Level 5:
* Level 6:
* Level 7: Non-maskable: parity errors, RESET button
*
* Note that despite references to A/UX mode in Linux and NetBSD, at least
* A/UX 3.0.1 still uses Classic mode.
*/
static void GLUE_set_irq(void *opaque, int irq, int level)
{
GLUEState *s = opaque;
int i;
if (s->auxmode) {
/* Classic mode */
switch (irq) {
case GLUE_IRQ_IN_VIA1:
irq = 0;
break;
case GLUE_IRQ_IN_VIA2:
irq = 1;
break;
case GLUE_IRQ_IN_SONIC:
/* Route to VIA2 instead */
qemu_set_irq(s->irqs[GLUE_IRQ_NUBUS_9], level);
return;
case GLUE_IRQ_IN_ESCC:
irq = 3;
break;
case GLUE_IRQ_IN_NMI:
irq = 6;
break;
default:
g_assert_not_reached();
}
} else {
/* A/UX mode */
switch (irq) {
case GLUE_IRQ_IN_VIA1:
irq = 5;
break;
case GLUE_IRQ_IN_VIA2:
irq = 1;
break;
case GLUE_IRQ_IN_SONIC:
irq = 2;
break;
case GLUE_IRQ_IN_ESCC:
irq = 3;
break;
case GLUE_IRQ_IN_NMI:
irq = 6;
break;
default:
g_assert_not_reached();
}
}
if (level) {
s->ipr |= 1 << irq;
} else {
@ -122,11 +220,37 @@ static void GLUE_set_irq(void *opaque, int irq, int level)
m68k_set_irq_level(s->cpu, 0, 0);
}
static void glue_auxmode_set_irq(void *opaque, int irq, int level)
{
GLUEState *s = GLUE(opaque);
s->auxmode = level;
}
static void glue_nmi(NMIState *n, int cpu_index, Error **errp)
{
GLUEState *s = GLUE(n);
/* Hold NMI active for 100ms */
GLUE_set_irq(s, GLUE_IRQ_IN_NMI, 1);
timer_mod(s->nmi_release, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 100);
}
static void glue_nmi_release(void *opaque)
{
GLUEState *s = GLUE(opaque);
GLUE_set_irq(s, GLUE_IRQ_IN_NMI, 0);
}
static void glue_reset(DeviceState *dev)
{
GLUEState *s = GLUE(dev);
s->ipr = 0;
s->auxmode = 0;
timer_del(s->nmi_release);
}
static const VMStateDescription vmstate_glue = {
@ -135,6 +259,8 @@ static const VMStateDescription vmstate_glue = {
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT8(ipr, GLUEState),
VMSTATE_UINT8(auxmode, GLUEState),
VMSTATE_TIMER_PTR(nmi_release, GLUEState),
VMSTATE_END_OF_LIST(),
},
};
@ -150,20 +276,36 @@ static Property glue_properties[] = {
DEFINE_PROP_END_OF_LIST(),
};
static void glue_finalize(Object *obj)
{
GLUEState *s = GLUE(obj);
timer_free(s->nmi_release);
}
static void glue_init(Object *obj)
{
DeviceState *dev = DEVICE(obj);
GLUEState *s = GLUE(dev);
qdev_init_gpio_in(dev, GLUE_set_irq, 8);
qdev_init_gpio_in_named(dev, glue_auxmode_set_irq, "auxmode", 1);
qdev_init_gpio_out(dev, s->irqs, 1);
/* NMI release timer */
s->nmi_release = timer_new_ms(QEMU_CLOCK_VIRTUAL, glue_nmi_release, s);
}
static void glue_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
NMIClass *nc = NMI_CLASS(klass);
dc->vmsd = &vmstate_glue;
dc->reset = glue_reset;
device_class_set_props(dc, glue_properties);
nc->nmi_monitor_handler = glue_nmi;
}
static const TypeInfo glue_info = {
@ -171,7 +313,12 @@ static const TypeInfo glue_info = {
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(GLUEState),
.instance_init = glue_init,
.instance_finalize = glue_finalize,
.class_init = glue_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_NMI },
{ }
},
};
static void main_cpu_reset(void *opaque)
@ -284,7 +431,10 @@ static void q800_init(MachineState *machine)
sysbus = SYS_BUS_DEVICE(via1_dev);
sysbus_realize_and_unref(sysbus, &error_fatal);
sysbus_mmio_map(sysbus, 1, VIA_BASE);
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, 0));
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, GLUE_IRQ_IN_VIA1));
/* A/UX mode */
qdev_connect_gpio_out(via1_dev, 0,
qdev_get_gpio_in_named(glue, "auxmode", 0));
adb_bus = qdev_get_child_bus(via1_dev, "adb.0");
dev = qdev_new(TYPE_ADB_KEYBOARD);
@ -297,7 +447,7 @@ static void q800_init(MachineState *machine)
sysbus = SYS_BUS_DEVICE(via2_dev);
sysbus_realize_and_unref(sysbus, &error_fatal);
sysbus_mmio_map(sysbus, 1, VIA_BASE + VIA_SIZE);
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, 1));
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, GLUE_IRQ_IN_VIA2));
/* MACSONIC */
@ -330,7 +480,7 @@ static void q800_init(MachineState *machine)
sysbus = SYS_BUS_DEVICE(dev);
sysbus_realize_and_unref(sysbus, &error_fatal);
sysbus_mmio_map(sysbus, 0, SONIC_BASE);
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, 2));
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(glue, GLUE_IRQ_IN_SONIC));
memory_region_init_rom(dp8393x_prom, NULL, "dp8393x-q800.prom",
SONIC_PROM_SIZE, &error_fatal);
@ -366,7 +516,8 @@ static void q800_init(MachineState *machine)
qdev_realize_and_unref(escc_orgate, NULL, &error_fatal);
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in(escc_orgate, 0));
sysbus_connect_irq(sysbus, 1, qdev_get_gpio_in(escc_orgate, 1));
qdev_connect_gpio_out(DEVICE(escc_orgate), 0, qdev_get_gpio_in(glue, 3));
qdev_connect_gpio_out(DEVICE(escc_orgate), 0,
qdev_get_gpio_in(glue, GLUE_IRQ_IN_ESCC));
sysbus_mmio_map(sysbus, 0, SCC_BASE);
/* SCSI */
@ -416,6 +567,14 @@ static void q800_init(MachineState *machine)
VIA2_NUBUS_IRQ_9 + i));
}
/*
* Since the framebuffer in slot 0x9 uses a separate IRQ, wire the unused
* IRQ via GLUE for use by SONIC Ethernet in classic mode
*/
qdev_connect_gpio_out(glue, GLUE_IRQ_NUBUS_9,
qdev_get_gpio_in_named(via2_dev, "nubus-irq",
VIA2_NUBUS_IRQ_9));
nubus = &NUBUS_BRIDGE(dev)->bus;
/* framebuffer in nubus slot #9 */
@ -425,7 +584,7 @@ static void q800_init(MachineState *machine)
qdev_prop_set_uint32(dev, "width", graphic_width);
qdev_prop_set_uint32(dev, "height", graphic_height);
qdev_prop_set_uint8(dev, "depth", graphic_depth);
if (graphic_width == 1152 && graphic_height == 870 && graphic_depth == 8) {
if (graphic_width == 1152 && graphic_height == 870) {
qdev_prop_set_uint8(dev, "display", MACFB_DISPLAY_APPLE_21_COLOR);
} else {
qdev_prop_set_uint8(dev, "display", MACFB_DISPLAY_VGA);

23
hw/misc/mac_via.c
View File

@ -130,6 +130,10 @@
* On SE/30, vertical sync interrupt enable.
* 0=enabled. This vSync interrupt shows up
* as a slot $E interrupt.
* On Quadra 800 this bit toggles A/UX mode which
* configures the glue logic to deliver some IRQs
* at different levels compared to a classic
* Mac.
*/
#define VIA1B_vADBS2 0x20 /* ADB state input bit 1 (unused on IIfx) */
#define VIA1B_vADBS1 0x10 /* ADB state input bit 0 (unused on IIfx) */
@ -876,6 +880,21 @@ static void via1_adb_update(MOS6522Q800VIA1State *v1s)
}
}
static void via1_auxmode_update(MOS6522Q800VIA1State *v1s)
{
MOS6522State *s = MOS6522(v1s);
int oldirq, irq;
oldirq = (v1s->last_b & VIA1B_vMystery) ? 1 : 0;
irq = (s->b & VIA1B_vMystery) ? 1 : 0;
/* Check to see if the A/UX mode bit has changed */
if (irq != oldirq) {
trace_via1_auxmode(irq);
qemu_set_irq(v1s->auxmode_irq, irq);
}
}
static uint64_t mos6522_q800_via1_read(void *opaque, hwaddr addr, unsigned size)
{
MOS6522Q800VIA1State *s = MOS6522_Q800_VIA1(opaque);
@ -898,6 +917,7 @@ static void mos6522_q800_via1_write(void *opaque, hwaddr addr, uint64_t val,
case VIA_REG_B:
via1_rtc_update(v1s);
via1_adb_update(v1s);
via1_auxmode_update(v1s);
v1s->last_b = ms->b;
break;
@ -1042,6 +1062,9 @@ static void mos6522_q800_via1_init(Object *obj)
TYPE_ADB_BUS, DEVICE(v1s), "adb.0");
qdev_init_gpio_in(DEVICE(obj), via1_irq_request, VIA1_IRQ_NB);
/* A/UX mode */
qdev_init_gpio_out(DEVICE(obj), &v1s->auxmode_irq, 1);
}
static const VMStateDescription vmstate_q800_via1 = {

1
hw/misc/trace-events
View File

@ -228,6 +228,7 @@ via1_rtc_cmd_pram_sect_write(int sector, int offset, int addr, int value) "secto
via1_adb_send(const char *state, uint8_t data, const char *vadbint) "state %s data=0x%02x vADBInt=%s"
via1_adb_receive(const char *state, uint8_t data, const char *vadbint, int status, int index, int size) "state %s data=0x%02x vADBInt=%s status=0x%x index=%d size=%d"
via1_adb_poll(uint8_t data, const char *vadbint, int status, int index, int size) "data=0x%02x vADBInt=%s status=0x%x index=%d size=%d"
via1_auxmode(int mode) "setting auxmode to %d"
# grlib_ahb_apb_pnp.c
grlib_ahb_pnp_read(uint64_t addr, uint32_t value) "AHB PnP read addr:0x%03"PRIx64" data:0x%08x"

1
include/hw/misc/mac_via.h
View File

@ -43,6 +43,7 @@ struct MOS6522Q800VIA1State {
MemoryRegion via_mem;
qemu_irq irqs[VIA1_IRQ_NB];
qemu_irq auxmode_irq;
uint8_t last_b;
/* RTC */