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-rw-r--r--hw/arm/stellaris.c396
1 files changed, 42 insertions, 354 deletions
diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index ad48cf2605..78827ace6b 100644
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -26,6 +26,7 @@
#include "hw/watchdog/cmsdk-apb-watchdog.h"
#include "migration/vmstate.h"
#include "hw/misc/unimp.h"
+#include "hw/timer/stellaris-gptm.h"
#include "hw/qdev-clock.h"
#include "qom/object.h"
@@ -55,306 +56,6 @@ typedef const struct {
uint32_t peripherals;
} stellaris_board_info;
-/* General purpose timer module. */
-
-#define TYPE_STELLARIS_GPTM "stellaris-gptm"
-OBJECT_DECLARE_SIMPLE_TYPE(gptm_state, STELLARIS_GPTM)
-
-struct gptm_state {
- SysBusDevice parent_obj;
-
- MemoryRegion iomem;
- uint32_t config;
- uint32_t mode[2];
- uint32_t control;
- uint32_t state;
- uint32_t mask;
- uint32_t load[2];
- uint32_t match[2];
- uint32_t prescale[2];
- uint32_t match_prescale[2];
- uint32_t rtc;
- int64_t tick[2];
- struct gptm_state *opaque[2];
- QEMUTimer *timer[2];
- /* The timers have an alternate output used to trigger the ADC. */
- qemu_irq trigger;
- qemu_irq irq;
-};
-
-static void gptm_update_irq(gptm_state *s)
-{
- int level;
- level = (s->state & s->mask) != 0;
- qemu_set_irq(s->irq, level);
-}
-
-static void gptm_stop(gptm_state *s, int n)
-{
- timer_del(s->timer[n]);
-}
-
-static void gptm_reload(gptm_state *s, int n, int reset)
-{
- int64_t tick;
- if (reset)
- tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- else
- tick = s->tick[n];
-
- if (s->config == 0) {
- /* 32-bit CountDown. */
- uint32_t count;
- count = s->load[0] | (s->load[1] << 16);
- tick += (int64_t)count * system_clock_scale;
- } else if (s->config == 1) {
- /* 32-bit RTC. 1Hz tick. */
- tick += NANOSECONDS_PER_SECOND;
- } else if (s->mode[n] == 0xa) {
- /* PWM mode. Not implemented. */
- } else {
- qemu_log_mask(LOG_UNIMP,
- "GPTM: 16-bit timer mode unimplemented: 0x%x\n",
- s->mode[n]);
- return;
- }
- s->tick[n] = tick;
- timer_mod(s->timer[n], tick);
-}
-
-static void gptm_tick(void *opaque)
-{
- gptm_state **p = (gptm_state **)opaque;
- gptm_state *s;
- int n;
-
- s = *p;
- n = p - s->opaque;
- if (s->config == 0) {
- s->state |= 1;
- if ((s->control & 0x20)) {
- /* Output trigger. */
- qemu_irq_pulse(s->trigger);
- }
- if (s->mode[0] & 1) {
- /* One-shot. */
- s->control &= ~1;
- } else {
- /* Periodic. */
- gptm_reload(s, 0, 0);
- }
- } else if (s->config == 1) {
- /* RTC. */
- uint32_t match;
- s->rtc++;
- match = s->match[0] | (s->match[1] << 16);
- if (s->rtc > match)
- s->rtc = 0;
- if (s->rtc == 0) {
- s->state |= 8;
- }
- gptm_reload(s, 0, 0);
- } else if (s->mode[n] == 0xa) {
- /* PWM mode. Not implemented. */
- } else {
- qemu_log_mask(LOG_UNIMP,
- "GPTM: 16-bit timer mode unimplemented: 0x%x\n",
- s->mode[n]);
- }
- gptm_update_irq(s);
-}
-
-static uint64_t gptm_read(void *opaque, hwaddr offset,
- unsigned size)
-{
- gptm_state *s = (gptm_state *)opaque;
-
- switch (offset) {
- case 0x00: /* CFG */
- return s->config;
- case 0x04: /* TAMR */
- return s->mode[0];
- case 0x08: /* TBMR */
- return s->mode[1];
- case 0x0c: /* CTL */
- return s->control;
- case 0x18: /* IMR */
- return s->mask;
- case 0x1c: /* RIS */
- return s->state;
- case 0x20: /* MIS */
- return s->state & s->mask;
- case 0x24: /* CR */
- return 0;
- case 0x28: /* TAILR */
- return s->load[0] | ((s->config < 4) ? (s->load[1] << 16) : 0);
- case 0x2c: /* TBILR */
- return s->load[1];
- case 0x30: /* TAMARCHR */
- return s->match[0] | ((s->config < 4) ? (s->match[1] << 16) : 0);
- case 0x34: /* TBMATCHR */
- return s->match[1];
- case 0x38: /* TAPR */
- return s->prescale[0];
- case 0x3c: /* TBPR */
- return s->prescale[1];
- case 0x40: /* TAPMR */
- return s->match_prescale[0];
- case 0x44: /* TBPMR */
- return s->match_prescale[1];
- case 0x48: /* TAR */
- if (s->config == 1) {
- return s->rtc;
- }
- qemu_log_mask(LOG_UNIMP,
- "GPTM: read of TAR but timer read not supported\n");
- return 0;
- case 0x4c: /* TBR */
- qemu_log_mask(LOG_UNIMP,
- "GPTM: read of TBR but timer read not supported\n");
- return 0;
- default:
- qemu_log_mask(LOG_GUEST_ERROR,
- "GPTM: read at bad offset 0x02%" HWADDR_PRIx "\n",
- offset);
- return 0;
- }
-}
-
-static void gptm_write(void *opaque, hwaddr offset,
- uint64_t value, unsigned size)
-{
- gptm_state *s = (gptm_state *)opaque;
- uint32_t oldval;
-
- /* The timers should be disabled before changing the configuration.
- We take advantage of this and defer everything until the timer
- is enabled. */
- switch (offset) {
- case 0x00: /* CFG */
- s->config = value;
- break;
- case 0x04: /* TAMR */
- s->mode[0] = value;
- break;
- case 0x08: /* TBMR */
- s->mode[1] = value;
- break;
- case 0x0c: /* CTL */
- oldval = s->control;
- s->control = value;
- /* TODO: Implement pause. */
- if ((oldval ^ value) & 1) {
- if (value & 1) {
- gptm_reload(s, 0, 1);
- } else {
- gptm_stop(s, 0);
- }
- }
- if (((oldval ^ value) & 0x100) && s->config >= 4) {
- if (value & 0x100) {
- gptm_reload(s, 1, 1);
- } else {
- gptm_stop(s, 1);
- }
- }
- break;
- case 0x18: /* IMR */
- s->mask = value & 0x77;
- gptm_update_irq(s);
- break;
- case 0x24: /* CR */
- s->state &= ~value;
- break;
- case 0x28: /* TAILR */
- s->load[0] = value & 0xffff;
- if (s->config < 4) {
- s->load[1] = value >> 16;
- }
- break;
- case 0x2c: /* TBILR */
- s->load[1] = value & 0xffff;
- break;
- case 0x30: /* TAMARCHR */
- s->match[0] = value & 0xffff;
- if (s->config < 4) {
- s->match[1] = value >> 16;
- }
- break;
- case 0x34: /* TBMATCHR */
- s->match[1] = value >> 16;
- break;
- case 0x38: /* TAPR */
- s->prescale[0] = value;
- break;
- case 0x3c: /* TBPR */
- s->prescale[1] = value;
- break;
- case 0x40: /* TAPMR */
- s->match_prescale[0] = value;
- break;
- case 0x44: /* TBPMR */
- s->match_prescale[0] = value;
- break;
- default:
- qemu_log_mask(LOG_GUEST_ERROR,
- "GPTM: write at bad offset 0x02%" HWADDR_PRIx "\n",
- offset);
- }
- gptm_update_irq(s);
-}
-
-static const MemoryRegionOps gptm_ops = {
- .read = gptm_read,
- .write = gptm_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static const VMStateDescription vmstate_stellaris_gptm = {
- .name = "stellaris_gptm",
- .version_id = 1,
- .minimum_version_id = 1,
- .fields = (VMStateField[]) {
- VMSTATE_UINT32(config, gptm_state),
- VMSTATE_UINT32_ARRAY(mode, gptm_state, 2),
- VMSTATE_UINT32(control, gptm_state),
- VMSTATE_UINT32(state, gptm_state),
- VMSTATE_UINT32(mask, gptm_state),
- VMSTATE_UNUSED(8),
- VMSTATE_UINT32_ARRAY(load, gptm_state, 2),
- VMSTATE_UINT32_ARRAY(match, gptm_state, 2),
- VMSTATE_UINT32_ARRAY(prescale, gptm_state, 2),
- VMSTATE_UINT32_ARRAY(match_prescale, gptm_state, 2),
- VMSTATE_UINT32(rtc, gptm_state),
- VMSTATE_INT64_ARRAY(tick, gptm_state, 2),
- VMSTATE_TIMER_PTR_ARRAY(timer, gptm_state, 2),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static void stellaris_gptm_init(Object *obj)
-{
- DeviceState *dev = DEVICE(obj);
- gptm_state *s = STELLARIS_GPTM(obj);
- SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
-
- sysbus_init_irq(sbd, &s->irq);
- qdev_init_gpio_out(dev, &s->trigger, 1);
-
- memory_region_init_io(&s->iomem, obj, &gptm_ops, s,
- "gptm", 0x1000);
- sysbus_init_mmio(sbd, &s->iomem);
-
- s->opaque[0] = s->opaque[1] = s;
-}
-
-static void stellaris_gptm_realize(DeviceState *dev, Error **errp)
-{
- gptm_state *s = STELLARIS_GPTM(dev);
- s->timer[0] = timer_new_ns(QEMU_CLOCK_VIRTUAL, gptm_tick, &s->opaque[0]);
- s->timer[1] = timer_new_ns(QEMU_CLOCK_VIRTUAL, gptm_tick, &s->opaque[1]);
-}
-
/* System controller. */
#define TYPE_STELLARIS_SYS "stellaris-sys"
@@ -562,17 +263,18 @@ static bool ssys_use_rcc2(ssys_state *s)
*/
static void ssys_calculate_system_clock(ssys_state *s, bool propagate_clock)
{
+ int period_ns;
/*
* SYSDIV field specifies divisor: 0 == /1, 1 == /2, etc. Input
* clock is 200MHz, which is a period of 5 ns. Dividing the clock
* frequency by X is the same as multiplying the period by X.
*/
if (ssys_use_rcc2(s)) {
- system_clock_scale = 5 * (((s->rcc2 >> 23) & 0x3f) + 1);
+ period_ns = 5 * (((s->rcc2 >> 23) & 0x3f) + 1);
} else {
- system_clock_scale = 5 * (((s->rcc >> 23) & 0xf) + 1);
+ period_ns = 5 * (((s->rcc >> 23) & 0xf) + 1);
}
- clock_set_ns(s->sysclk, system_clock_scale);
+ clock_set_ns(s->sysclk, period_ns);
if (propagate_clock) {
clock_propagate(s->sysclk);
}
@@ -755,33 +457,6 @@ static void stellaris_sys_instance_init(Object *obj)
s->sysclk = qdev_init_clock_out(DEVICE(s), "SYSCLK");
}
-static DeviceState *stellaris_sys_init(uint32_t base, qemu_irq irq,
- stellaris_board_info *board,
- uint8_t *macaddr)
-{
- DeviceState *dev = qdev_new(TYPE_STELLARIS_SYS);
- SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
-
- /* Most devices come preprogrammed with a MAC address in the user data. */
- qdev_prop_set_uint32(dev, "user0",
- macaddr[0] | (macaddr[1] << 8) | (macaddr[2] << 16));
- qdev_prop_set_uint32(dev, "user1",
- macaddr[3] | (macaddr[4] << 8) | (macaddr[5] << 16));
- qdev_prop_set_uint32(dev, "did0", board->did0);
- qdev_prop_set_uint32(dev, "did1", board->did1);
- qdev_prop_set_uint32(dev, "dc0", board->dc0);
- qdev_prop_set_uint32(dev, "dc1", board->dc1);
- qdev_prop_set_uint32(dev, "dc2", board->dc2);
- qdev_prop_set_uint32(dev, "dc3", board->dc3);
- qdev_prop_set_uint32(dev, "dc4", board->dc4);
-
- sysbus_realize_and_unref(sbd, &error_fatal);
- sysbus_mmio_map(sbd, 0, base);
- sysbus_connect_irq(sbd, 0, irq);
-
- return dev;
-}
-
/* I2C controller. */
#define TYPE_STELLARIS_I2C "stellaris-i2c"
@@ -1349,6 +1024,7 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
DeviceState *ssys_dev;
int i;
int j;
+ const uint8_t *macaddr;
MemoryRegion *sram = g_new(MemoryRegion, 1);
MemoryRegion *flash = g_new(MemoryRegion, 1);
@@ -1366,15 +1042,42 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
&error_fatal);
memory_region_add_subregion(system_memory, 0x20000000, sram);
+ /*
+ * Create the system-registers object early, because we will
+ * need its sysclk output.
+ */
+ ssys_dev = qdev_new(TYPE_STELLARIS_SYS);
+ /* Most devices come preprogrammed with a MAC address in the user data. */
+ macaddr = nd_table[0].macaddr.a;
+ qdev_prop_set_uint32(ssys_dev, "user0",
+ macaddr[0] | (macaddr[1] << 8) | (macaddr[2] << 16));
+ qdev_prop_set_uint32(ssys_dev, "user1",
+ macaddr[3] | (macaddr[4] << 8) | (macaddr[5] << 16));
+ qdev_prop_set_uint32(ssys_dev, "did0", board->did0);
+ qdev_prop_set_uint32(ssys_dev, "did1", board->did1);
+ qdev_prop_set_uint32(ssys_dev, "dc0", board->dc0);
+ qdev_prop_set_uint32(ssys_dev, "dc1", board->dc1);
+ qdev_prop_set_uint32(ssys_dev, "dc2", board->dc2);
+ qdev_prop_set_uint32(ssys_dev, "dc3", board->dc3);
+ qdev_prop_set_uint32(ssys_dev, "dc4", board->dc4);
+ sysbus_realize_and_unref(SYS_BUS_DEVICE(ssys_dev), &error_fatal);
+
nvic = qdev_new(TYPE_ARMV7M);
qdev_prop_set_uint32(nvic, "num-irq", NUM_IRQ_LINES);
qdev_prop_set_string(nvic, "cpu-type", ms->cpu_type);
qdev_prop_set_bit(nvic, "enable-bitband", true);
+ qdev_connect_clock_in(nvic, "cpuclk",
+ qdev_get_clock_out(ssys_dev, "SYSCLK"));
+ /* This SoC does not connect the systick reference clock */
object_property_set_link(OBJECT(nvic), "memory",
OBJECT(get_system_memory()), &error_abort);
/* This will exit with an error if the user passed us a bad cpu_type */
sysbus_realize_and_unref(SYS_BUS_DEVICE(nvic), &error_fatal);
+ /* Now we can wire up the IRQ and MMIO of the system registers */
+ sysbus_mmio_map(SYS_BUS_DEVICE(ssys_dev), 0, 0x400fe000);
+ sysbus_connect_irq(SYS_BUS_DEVICE(ssys_dev), 0, qdev_get_gpio_in(nvic, 28));
+
if (board->dc1 & (1 << 16)) {
dev = sysbus_create_varargs(TYPE_STELLARIS_ADC, 0x40038000,
qdev_get_gpio_in(nvic, 14),
@@ -1388,19 +1091,21 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
}
for (i = 0; i < 4; i++) {
if (board->dc2 & (0x10000 << i)) {
- dev = sysbus_create_simple(TYPE_STELLARIS_GPTM,
- 0x40030000 + i * 0x1000,
- qdev_get_gpio_in(nvic, timer_irq[i]));
+ SysBusDevice *sbd;
+
+ dev = qdev_new(TYPE_STELLARIS_GPTM);
+ sbd = SYS_BUS_DEVICE(dev);
+ qdev_connect_clock_in(dev, "clk",
+ qdev_get_clock_out(ssys_dev, "SYSCLK"));
+ sysbus_realize_and_unref(sbd, &error_fatal);
+ sysbus_mmio_map(sbd, 0, 0x40030000 + i * 0x1000);
+ sysbus_connect_irq(sbd, 0, qdev_get_gpio_in(nvic, timer_irq[i]));
/* TODO: This is incorrect, but we get away with it because
the ADC output is only ever pulsed. */
qdev_connect_gpio_out(dev, 0, adc);
}
}
- ssys_dev = stellaris_sys_init(0x400fe000, qdev_get_gpio_in(nvic, 28),
- board, nd_table[0].macaddr.a);
-
-
if (board->dc1 & (1 << 3)) { /* watchdog present */
dev = qdev_new(TYPE_LUMINARY_WATCHDOG);
@@ -1642,22 +1347,6 @@ static const TypeInfo stellaris_i2c_info = {
.class_init = stellaris_i2c_class_init,
};
-static void stellaris_gptm_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- dc->vmsd = &vmstate_stellaris_gptm;
- dc->realize = stellaris_gptm_realize;
-}
-
-static const TypeInfo stellaris_gptm_info = {
- .name = TYPE_STELLARIS_GPTM,
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(gptm_state),
- .instance_init = stellaris_gptm_init,
- .class_init = stellaris_gptm_class_init,
-};
-
static void stellaris_adc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1696,7 +1385,6 @@ static const TypeInfo stellaris_sys_info = {
static void stellaris_register_types(void)
{
type_register_static(&stellaris_i2c_info);
- type_register_static(&stellaris_gptm_info);
type_register_static(&stellaris_adc_info);
type_register_static(&stellaris_sys_info);
}
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-21 01:52:19 +0000