hw/arm/bcm2838: Add GIC-400 to BCM2838 SoC

Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240226000259.2752893-6-sergey.kambalin@auriga.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 168 insertions, 2 deletions

diff --git a/hw/arm/bcm2838.c b/hw/arm/bcm2838.c
index 05281e247f..332e906a84 100644
--- a/hw/arm/bcm2838.c
+++ b/hw/arm/bcm2838.c
@@ -14,8 +14,36 @@
 #include "hw/arm/bcm2838.h"
 #include "trace.h"
 
+#define GIC400_MAINTENANCE_IRQ      9
+#define GIC400_TIMER_NS_EL2_IRQ     10
+#define GIC400_TIMER_VIRT_IRQ       11
+#define GIC400_LEGACY_FIQ           12
+#define GIC400_TIMER_S_EL1_IRQ      13
+#define GIC400_TIMER_NS_EL1_IRQ     14
+#define GIC400_LEGACY_IRQ           15
+
+/* Number of external interrupt lines to configure the GIC with */
+#define GIC_NUM_IRQS                192
+
+#define PPI(cpu, irq) (GIC_NUM_IRQS + (cpu) * GIC_INTERNAL + GIC_NR_SGIS + irq)
+
+#define GIC_BASE_OFS                0x0000
+#define GIC_DIST_OFS                0x1000
+#define GIC_CPU_OFS                 0x2000
+#define GIC_VIFACE_THIS_OFS         0x4000
+#define GIC_VIFACE_OTHER_OFS(cpu)  (0x5000 + (cpu) * 0x200)
+#define GIC_VCPU_OFS                0x6000
+
 #define VIRTUAL_PMU_IRQ 7
 
+static void bcm2838_gic_set_irq(void *opaque, int irq, int level)
+{
+    BCM2838State *s = (BCM2838State *)opaque;
+
+    trace_bcm2838_gic_set_irq(irq, level);
+    qemu_set_irq(qdev_get_gpio_in(DEVICE(&s->gic), irq), level);
+}
+
 static void bcm2838_init(Object *obj)
 {
     BCM2838State *s = BCM2838(obj);
@@ -28,11 +56,12 @@ static void bcm2838_init(Object *obj)
                               "vcram-size");
     object_property_add_alias(obj, "command-line", OBJECT(&s->peripherals),
                               "command-line");
+
+    object_initialize_child(obj, "gic", &s->gic, TYPE_ARM_GIC);
 }
 
 static void bcm2838_realize(DeviceState *dev, Error **errp)
 {
-    int n;
     BCM2838State *s = BCM2838(dev);
     BCM283XBaseState *s_base = BCM283X_BASE(dev);
     BCM283XBaseClass *bc_base = BCM283X_BASE_GET_CLASS(dev);
@@ -40,6 +69,8 @@ static void bcm2838_realize(DeviceState *dev, Error **errp)
     BCMSocPeripheralBaseState *ps_base =
         BCM_SOC_PERIPHERALS_BASE(&s->peripherals);
 
+    DeviceState *gicdev = NULL;
+
     if (!bcm283x_common_realize(dev, ps_base, errp)) {
         return;
     }
@@ -52,11 +83,15 @@ static void bcm2838_realize(DeviceState *dev, Error **errp)
     sysbus_mmio_map(SYS_BUS_DEVICE(&s_base->control), 0, bc_base->ctrl_base);
 
     /* Create cores */
-    for (n = 0; n < bc_base->core_count; n++) {
+    for (int n = 0; n < bc_base->core_count; n++) {
 
         object_property_set_int(OBJECT(&s_base->cpu[n].core), "mp-affinity",
                                 (bc_base->clusterid << 8) | n, &error_abort);
 
+        /* set periphbase/CBAR value for CPU-local registers */
+        object_property_set_int(OBJECT(&s_base->cpu[n].core), "reset-cbar",
+                                bc_base->peri_base, &error_abort);
+
         /* start powered off if not enabled */
         object_property_set_bool(OBJECT(&s_base->cpu[n].core),
                                  "start-powered-off",
@@ -66,6 +101,134 @@ static void bcm2838_realize(DeviceState *dev, Error **errp)
             return;
         }
     }
+
+    if (!object_property_set_uint(OBJECT(&s->gic), "revision", 2, errp)) {
+        return;
+    }
+
+    if (!object_property_set_uint(OBJECT(&s->gic), "num-cpu", BCM283X_NCPUS,
+                                  errp)) {
+        return;
+    }
+
+    if (!object_property_set_uint(OBJECT(&s->gic), "num-irq",
+                                  GIC_NUM_IRQS + GIC_INTERNAL, errp)) {
+        return;
+    }
+
+    if (!object_property_set_bool(OBJECT(&s->gic),
+                                  "has-virtualization-extensions", true,
+                                  errp)) {
+        return;
+    }
+
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->gic), errp)) {
+        return;
+    }
+
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->gic), 0,
+                    bc_base->ctrl_base + BCM2838_GIC_BASE + GIC_DIST_OFS);
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->gic), 1,
+                    bc_base->ctrl_base + BCM2838_GIC_BASE + GIC_CPU_OFS);
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->gic), 2,
+                    bc_base->ctrl_base + BCM2838_GIC_BASE + GIC_VIFACE_THIS_OFS);
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->gic), 3,
+                    bc_base->ctrl_base + BCM2838_GIC_BASE + GIC_VCPU_OFS);
+
+    for (int n = 0; n < BCM283X_NCPUS; n++) {
+        sysbus_mmio_map(SYS_BUS_DEVICE(&s->gic), 4 + n,
+                        bc_base->ctrl_base + BCM2838_GIC_BASE
+                            + GIC_VIFACE_OTHER_OFS(n));
+    }
+
+    gicdev = DEVICE(&s->gic);
+
+    for (int n = 0; n < BCM283X_NCPUS; n++) {
+        DeviceState *cpudev = DEVICE(&s_base->cpu[n]);
+
+        /* Connect the GICv2 outputs to the CPU */
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->gic), n,
+                           qdev_get_gpio_in(cpudev, ARM_CPU_IRQ));
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->gic), n + BCM283X_NCPUS,
+                           qdev_get_gpio_in(cpudev, ARM_CPU_FIQ));
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->gic), n + 2 * BCM283X_NCPUS,
+                           qdev_get_gpio_in(cpudev, ARM_CPU_VIRQ));
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->gic), n + 3 * BCM283X_NCPUS,
+                           qdev_get_gpio_in(cpudev, ARM_CPU_VFIQ));
+
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->gic), n + 4 * BCM283X_NCPUS,
+                           qdev_get_gpio_in(gicdev,
+                                            PPI(n, GIC400_MAINTENANCE_IRQ)));
+
+        /* Connect timers from the CPU to the interrupt controller */
+        qdev_connect_gpio_out(cpudev, GTIMER_PHYS,
+                    qdev_get_gpio_in(gicdev, PPI(n, GIC400_TIMER_NS_EL1_IRQ)));
+        qdev_connect_gpio_out(cpudev, GTIMER_VIRT,
+                    qdev_get_gpio_in(gicdev, PPI(n, GIC400_TIMER_VIRT_IRQ)));
+        qdev_connect_gpio_out(cpudev, GTIMER_HYP,
+                    qdev_get_gpio_in(gicdev, PPI(n, GIC400_TIMER_NS_EL2_IRQ)));
+        qdev_connect_gpio_out(cpudev, GTIMER_SEC,
+                    qdev_get_gpio_in(gicdev, PPI(n, GIC400_TIMER_S_EL1_IRQ)));
+        /* PMU interrupt */
+        qdev_connect_gpio_out_named(cpudev, "pmu-interrupt", 0,
+                    qdev_get_gpio_in(gicdev, PPI(n, VIRTUAL_PMU_IRQ)));
+    }
+
+    /* Connect UART0 to the interrupt controller */
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->uart0), 0,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_UART0));
+
+    /* Connect AUX / UART1 to the interrupt controller */
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->aux), 0,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_AUX_UART1));
+
+    /* Connect VC mailbox to the interrupt controller */
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->mboxes), 0,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_MBOX));
+
+    /* Connect SD host to the interrupt controller */
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->sdhost), 0,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_SDHOST));
+
+    /* According to DTS, EMMC and EMMC2 share one irq */
+    DeviceState *mmc_irq_orgate = DEVICE(&ps->mmc_irq_orgate);
+
+    /* Connect EMMC and EMMC2 to the interrupt controller */
+    qdev_connect_gpio_out(mmc_irq_orgate, 0,
+                          qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_EMMC_EMMC2));
+
+    /* Connect USB OTG and MPHI to the interrupt controller */
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->mphi), 0,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_MPHI));
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->dwc2), 0,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_DWC2));
+
+    /* Connect DMA 0-6 to the interrupt controller */
+    for (int n = GIC_SPI_INTERRUPT_DMA_0; n <= GIC_SPI_INTERRUPT_DMA_6; n++) {
+        sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->dma),
+                           n - GIC_SPI_INTERRUPT_DMA_0,
+                           qdev_get_gpio_in(gicdev, n));
+    }
+
+    /* According to DTS, DMA 7 and 8 share one irq */
+    DeviceState *dma_7_8_irq_orgate = DEVICE(&ps->dma_7_8_irq_orgate);
+
+    /* Connect DMA 7-8 to the interrupt controller */
+    qdev_connect_gpio_out(dma_7_8_irq_orgate, 0,
+                          qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_DMA_7_8));
+
+    /* According to DTS, DMA 9 and 10 share one irq */
+    DeviceState *dma_9_10_irq_orgate = DEVICE(&ps->dma_9_10_irq_orgate);
+
+    /* Connect DMA 9-10 to the interrupt controller */
+    qdev_connect_gpio_out(dma_9_10_irq_orgate, 0,
+                          qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_DMA_9_10));
+
+    /* Pass through inbound GPIO lines to the GIC */
+    qdev_init_gpio_in(dev, bcm2838_gic_set_irq, GIC_NUM_IRQS);
+
+    /* Pass through outbound IRQ lines from the GIC */
+    qdev_pass_gpios(DEVICE(&s->gic), DEVICE(&s->peripherals), NULL);
 }
 
 static void bcm2838_class_init(ObjectClass *oc, void *data)
diff --git a/hw/arm/trace-events b/hw/arm/trace-events
index fd0d92762e..f1a54a02df 100644
--- a/hw/arm/trace-events
+++ b/hw/arm/trace-events
@@ -70,3 +70,6 @@ z2_aer915_event(int8_t event, int8_t len) "i2c event =0x%x len=%d bytes"
 xen_create_virtio_mmio_devices(int i, int irq, uint64_t base) "Created virtio-mmio device %d: irq %d base 0x%"PRIx64
 xen_init_ram(uint64_t machine_ram_size) "Initialized xen ram with size 0x%"PRIx64
 xen_enable_tpm(uint64_t addr) "Connected tpmdev at address 0x%"PRIx64
+
+# bcm2838.c
+bcm2838_gic_set_irq(int irq, int level) "gic irq:%d lvl:%d"