diff options
Diffstat (limited to 'qemu/hw/intc/bcm2836_control.c')
-rw-r--r-- | qemu/hw/intc/bcm2836_control.c | 304 |
1 files changed, 0 insertions, 304 deletions
diff --git a/qemu/hw/intc/bcm2836_control.c b/qemu/hw/intc/bcm2836_control.c deleted file mode 100644 index d0271810c..000000000 --- a/qemu/hw/intc/bcm2836_control.c +++ /dev/null @@ -1,304 +0,0 @@ -/* - * Rasperry Pi 2 emulation ARM control logic module. - * Copyright (c) 2015, Microsoft - * Written by Andrew Baumann - * - * Based on bcm2835_ic.c (Raspberry Pi emulation) (c) 2012 Gregory Estrade - * This code is licensed under the GNU GPLv2 and later. - * - * At present, only implements interrupt routing, and mailboxes (i.e., - * not local timer, PMU interrupt, or AXI counters). - * - * Ref: - * https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2836/QA7_rev3.4.pdf - */ - -#include "qemu/osdep.h" -#include "hw/intc/bcm2836_control.h" - -#define REG_GPU_ROUTE 0x0c -#define REG_TIMERCONTROL 0x40 -#define REG_MBOXCONTROL 0x50 -#define REG_IRQSRC 0x60 -#define REG_FIQSRC 0x70 -#define REG_MBOX0_WR 0x80 -#define REG_MBOX0_RDCLR 0xc0 -#define REG_LIMIT 0x100 - -#define IRQ_BIT(cntrl, num) (((cntrl) & (1 << (num))) != 0) -#define FIQ_BIT(cntrl, num) (((cntrl) & (1 << ((num) + 4))) != 0) - -#define IRQ_CNTPSIRQ 0 -#define IRQ_CNTPNSIRQ 1 -#define IRQ_CNTHPIRQ 2 -#define IRQ_CNTVIRQ 3 -#define IRQ_MAILBOX0 4 -#define IRQ_MAILBOX1 5 -#define IRQ_MAILBOX2 6 -#define IRQ_MAILBOX3 7 -#define IRQ_GPU 8 -#define IRQ_PMU 9 -#define IRQ_AXI 10 -#define IRQ_TIMER 11 -#define IRQ_MAX IRQ_TIMER - -static void deliver_local(BCM2836ControlState *s, uint8_t core, uint8_t irq, - uint32_t controlreg, uint8_t controlidx) -{ - if (FIQ_BIT(controlreg, controlidx)) { - /* deliver a FIQ */ - s->fiqsrc[core] |= (uint32_t)1 << irq; - } else if (IRQ_BIT(controlreg, controlidx)) { - /* deliver an IRQ */ - s->irqsrc[core] |= (uint32_t)1 << irq; - } else { - /* the interrupt is masked */ - } -} - -/* Update interrupts. */ -static void bcm2836_control_update(BCM2836ControlState *s) -{ - int i, j; - - /* reset pending IRQs/FIQs */ - for (i = 0; i < BCM2836_NCORES; i++) { - s->irqsrc[i] = s->fiqsrc[i] = 0; - } - - /* apply routing logic, update status regs */ - if (s->gpu_irq) { - assert(s->route_gpu_irq < BCM2836_NCORES); - s->irqsrc[s->route_gpu_irq] |= (uint32_t)1 << IRQ_GPU; - } - - if (s->gpu_fiq) { - assert(s->route_gpu_fiq < BCM2836_NCORES); - s->fiqsrc[s->route_gpu_fiq] |= (uint32_t)1 << IRQ_GPU; - } - - for (i = 0; i < BCM2836_NCORES; i++) { - /* handle local timer interrupts for this core */ - if (s->timerirqs[i]) { - assert(s->timerirqs[i] < (1 << (IRQ_CNTVIRQ + 1))); /* sane mask? */ - for (j = 0; j <= IRQ_CNTVIRQ; j++) { - if ((s->timerirqs[i] & (1 << j)) != 0) { - /* local interrupt j is set */ - deliver_local(s, i, j, s->timercontrol[i], j); - } - } - } - - /* handle mailboxes for this core */ - for (j = 0; j < BCM2836_MBPERCORE; j++) { - if (s->mailboxes[i * BCM2836_MBPERCORE + j] != 0) { - /* mailbox j is set */ - deliver_local(s, i, j + IRQ_MAILBOX0, s->mailboxcontrol[i], j); - } - } - } - - /* call set_irq appropriately for each output */ - for (i = 0; i < BCM2836_NCORES; i++) { - qemu_set_irq(s->irq[i], s->irqsrc[i] != 0); - qemu_set_irq(s->fiq[i], s->fiqsrc[i] != 0); - } -} - -static void bcm2836_control_set_local_irq(void *opaque, int core, int local_irq, - int level) -{ - BCM2836ControlState *s = opaque; - - assert(core >= 0 && core < BCM2836_NCORES); - assert(local_irq >= 0 && local_irq <= IRQ_CNTVIRQ); - - s->timerirqs[core] = deposit32(s->timerirqs[core], local_irq, 1, !!level); - - bcm2836_control_update(s); -} - -/* XXX: the following wrapper functions are a kludgy workaround, - * needed because I can't seem to pass useful information in the "irq" - * parameter when using named interrupts. Feel free to clean this up! - */ - -static void bcm2836_control_set_local_irq0(void *opaque, int core, int level) -{ - bcm2836_control_set_local_irq(opaque, core, 0, level); -} - -static void bcm2836_control_set_local_irq1(void *opaque, int core, int level) -{ - bcm2836_control_set_local_irq(opaque, core, 1, level); -} - -static void bcm2836_control_set_local_irq2(void *opaque, int core, int level) -{ - bcm2836_control_set_local_irq(opaque, core, 2, level); -} - -static void bcm2836_control_set_local_irq3(void *opaque, int core, int level) -{ - bcm2836_control_set_local_irq(opaque, core, 3, level); -} - -static void bcm2836_control_set_gpu_irq(void *opaque, int irq, int level) -{ - BCM2836ControlState *s = opaque; - - s->gpu_irq = level; - - bcm2836_control_update(s); -} - -static void bcm2836_control_set_gpu_fiq(void *opaque, int irq, int level) -{ - BCM2836ControlState *s = opaque; - - s->gpu_fiq = level; - - bcm2836_control_update(s); -} - -static uint64_t bcm2836_control_read(void *opaque, hwaddr offset, unsigned size) -{ - BCM2836ControlState *s = opaque; - - if (offset == REG_GPU_ROUTE) { - assert(s->route_gpu_fiq < BCM2836_NCORES - && s->route_gpu_irq < BCM2836_NCORES); - return ((uint32_t)s->route_gpu_fiq << 2) | s->route_gpu_irq; - } else if (offset >= REG_TIMERCONTROL && offset < REG_MBOXCONTROL) { - return s->timercontrol[(offset - REG_TIMERCONTROL) >> 2]; - } else if (offset >= REG_MBOXCONTROL && offset < REG_IRQSRC) { - return s->mailboxcontrol[(offset - REG_MBOXCONTROL) >> 2]; - } else if (offset >= REG_IRQSRC && offset < REG_FIQSRC) { - return s->irqsrc[(offset - REG_IRQSRC) >> 2]; - } else if (offset >= REG_FIQSRC && offset < REG_MBOX0_WR) { - return s->fiqsrc[(offset - REG_FIQSRC) >> 2]; - } else if (offset >= REG_MBOX0_RDCLR && offset < REG_LIMIT) { - return s->mailboxes[(offset - REG_MBOX0_RDCLR) >> 2]; - } else { - qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", - __func__, offset); - return 0; - } -} - -static void bcm2836_control_write(void *opaque, hwaddr offset, - uint64_t val, unsigned size) -{ - BCM2836ControlState *s = opaque; - - if (offset == REG_GPU_ROUTE) { - s->route_gpu_irq = val & 0x3; - s->route_gpu_fiq = (val >> 2) & 0x3; - } else if (offset >= REG_TIMERCONTROL && offset < REG_MBOXCONTROL) { - s->timercontrol[(offset - REG_TIMERCONTROL) >> 2] = val & 0xff; - } else if (offset >= REG_MBOXCONTROL && offset < REG_IRQSRC) { - s->mailboxcontrol[(offset - REG_MBOXCONTROL) >> 2] = val & 0xff; - } else if (offset >= REG_MBOX0_WR && offset < REG_MBOX0_RDCLR) { - s->mailboxes[(offset - REG_MBOX0_WR) >> 2] |= val; - } else if (offset >= REG_MBOX0_RDCLR && offset < REG_LIMIT) { - s->mailboxes[(offset - REG_MBOX0_RDCLR) >> 2] &= ~val; - } else { - qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", - __func__, offset); - return; - } - - bcm2836_control_update(s); -} - -static const MemoryRegionOps bcm2836_control_ops = { - .read = bcm2836_control_read, - .write = bcm2836_control_write, - .endianness = DEVICE_NATIVE_ENDIAN, - .valid.min_access_size = 4, - .valid.max_access_size = 4, -}; - -static void bcm2836_control_reset(DeviceState *d) -{ - BCM2836ControlState *s = BCM2836_CONTROL(d); - int i; - - s->route_gpu_irq = s->route_gpu_fiq = 0; - - for (i = 0; i < BCM2836_NCORES; i++) { - s->timercontrol[i] = 0; - s->mailboxcontrol[i] = 0; - } - - for (i = 0; i < BCM2836_NCORES * BCM2836_MBPERCORE; i++) { - s->mailboxes[i] = 0; - } -} - -static void bcm2836_control_init(Object *obj) -{ - BCM2836ControlState *s = BCM2836_CONTROL(obj); - DeviceState *dev = DEVICE(obj); - - memory_region_init_io(&s->iomem, obj, &bcm2836_control_ops, s, - TYPE_BCM2836_CONTROL, REG_LIMIT); - sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); - - /* inputs from each CPU core */ - qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq0, "cntpsirq", - BCM2836_NCORES); - qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq1, "cntpnsirq", - BCM2836_NCORES); - qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq2, "cnthpirq", - BCM2836_NCORES); - qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq3, "cntvirq", - BCM2836_NCORES); - - /* IRQ and FIQ inputs from upstream bcm2835 controller */ - qdev_init_gpio_in_named(dev, bcm2836_control_set_gpu_irq, "gpu-irq", 1); - qdev_init_gpio_in_named(dev, bcm2836_control_set_gpu_fiq, "gpu-fiq", 1); - - /* outputs to CPU cores */ - qdev_init_gpio_out_named(dev, s->irq, "irq", BCM2836_NCORES); - qdev_init_gpio_out_named(dev, s->fiq, "fiq", BCM2836_NCORES); -} - -static const VMStateDescription vmstate_bcm2836_control = { - .name = TYPE_BCM2836_CONTROL, - .version_id = 1, - .minimum_version_id = 1, - .fields = (VMStateField[]) { - VMSTATE_UINT32_ARRAY(mailboxes, BCM2836ControlState, - BCM2836_NCORES * BCM2836_MBPERCORE), - VMSTATE_UINT8(route_gpu_irq, BCM2836ControlState), - VMSTATE_UINT8(route_gpu_fiq, BCM2836ControlState), - VMSTATE_UINT32_ARRAY(timercontrol, BCM2836ControlState, BCM2836_NCORES), - VMSTATE_UINT32_ARRAY(mailboxcontrol, BCM2836ControlState, - BCM2836_NCORES), - VMSTATE_END_OF_LIST() - } -}; - -static void bcm2836_control_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - - dc->reset = bcm2836_control_reset; - dc->vmsd = &vmstate_bcm2836_control; -} - -static TypeInfo bcm2836_control_info = { - .name = TYPE_BCM2836_CONTROL, - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(BCM2836ControlState), - .class_init = bcm2836_control_class_init, - .instance_init = bcm2836_control_init, -}; - -static void bcm2836_control_register_types(void) -{ - type_register_static(&bcm2836_control_info); -} - -type_init(bcm2836_control_register_types) |