root / hw / a9mpcore.c @ 0b7ade1d
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/*
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* Cortex-A9MPCore internal peripheral emulation.
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*
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* Copyright (c) 2009 CodeSourcery.
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* Copyright (c) 2011 Linaro Limited.
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* Written by Paul Brook, Peter Maydell.
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*
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* This code is licensed under the GPL.
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*/
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#include "sysbus.h" |
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/* Configuration for arm_gic.c:
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* max number of CPUs, how to ID current CPU
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*/
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#define NCPU 4 |
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static inline int |
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gic_get_current_cpu(void)
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{ |
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return cpu_single_env->cpu_index;
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} |
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#include "arm_gic.c" |
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/* A9MP private memory region. */
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typedef struct a9mp_priv_state { |
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gic_state gic; |
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uint32_t scu_control; |
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uint32_t scu_status; |
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uint32_t old_timer_status[8];
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uint32_t num_cpu; |
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qemu_irq *timer_irq; |
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MemoryRegion scu_iomem; |
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MemoryRegion ptimer_iomem; |
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MemoryRegion container; |
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DeviceState *mptimer; |
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uint32_t num_irq; |
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} a9mp_priv_state; |
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static uint64_t a9_scu_read(void *opaque, target_phys_addr_t offset, |
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unsigned size)
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{ |
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a9mp_priv_state *s = (a9mp_priv_state *)opaque; |
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switch (offset) {
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case 0x00: /* Control */ |
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return s->scu_control;
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case 0x04: /* Configuration */ |
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return (((1 << s->num_cpu) - 1) << 4) | (s->num_cpu - 1); |
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case 0x08: /* CPU Power Status */ |
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return s->scu_status;
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case 0x09: /* CPU status. */ |
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return s->scu_status >> 8; |
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case 0x0a: /* CPU status. */ |
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return s->scu_status >> 16; |
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case 0x0b: /* CPU status. */ |
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return s->scu_status >> 24; |
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case 0x0c: /* Invalidate All Registers In Secure State */ |
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return 0; |
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case 0x40: /* Filtering Start Address Register */ |
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case 0x44: /* Filtering End Address Register */ |
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/* RAZ/WI, like an implementation with only one AXI master */
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return 0; |
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case 0x50: /* SCU Access Control Register */ |
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case 0x54: /* SCU Non-secure Access Control Register */ |
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/* unimplemented, fall through */
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default:
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return 0; |
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} |
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} |
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static void a9_scu_write(void *opaque, target_phys_addr_t offset, |
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uint64_t value, unsigned size)
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{ |
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a9mp_priv_state *s = (a9mp_priv_state *)opaque; |
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uint32_t mask; |
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uint32_t shift; |
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switch (size) {
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case 1: |
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mask = 0xff;
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break;
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case 2: |
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mask = 0xffff;
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break;
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case 4: |
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mask = 0xffffffff;
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break;
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default:
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fprintf(stderr, "Invalid size %u in write to a9 scu register %x\n",
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size, offset); |
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return;
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} |
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switch (offset) {
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case 0x00: /* Control */ |
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s->scu_control = value & 1;
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break;
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case 0x4: /* Configuration: RO */ |
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break;
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case 0x08: case 0x09: case 0x0A: case 0x0B: /* Power Control */ |
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shift = (offset - 0x8) * 8; |
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s->scu_status &= ~(mask << shift); |
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s->scu_status |= ((value & mask) << shift); |
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break;
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case 0x0c: /* Invalidate All Registers In Secure State */ |
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/* no-op as we do not implement caches */
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break;
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case 0x40: /* Filtering Start Address Register */ |
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case 0x44: /* Filtering End Address Register */ |
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/* RAZ/WI, like an implementation with only one AXI master */
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break;
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case 0x50: /* SCU Access Control Register */ |
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case 0x54: /* SCU Non-secure Access Control Register */ |
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/* unimplemented, fall through */
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default:
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break;
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} |
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} |
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static const MemoryRegionOps a9_scu_ops = { |
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.read = a9_scu_read, |
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.write = a9_scu_write, |
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.endianness = DEVICE_NATIVE_ENDIAN, |
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}; |
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static void a9mpcore_timer_irq_handler(void *opaque, int irq, int level) |
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{ |
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a9mp_priv_state *s = (a9mp_priv_state *)opaque; |
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if (level && !s->old_timer_status[irq]) {
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gic_set_pending_private(&s->gic, irq >> 1, 29 + (irq & 1)); |
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} |
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s->old_timer_status[irq] = level; |
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} |
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static void a9mp_priv_reset(DeviceState *dev) |
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{ |
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a9mp_priv_state *s = FROM_SYSBUSGIC(a9mp_priv_state, sysbus_from_qdev(dev)); |
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int i;
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s->scu_control = 0;
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for (i = 0; i < ARRAY_SIZE(s->old_timer_status); i++) { |
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s->old_timer_status[i] = 0;
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} |
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} |
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static int a9mp_priv_init(SysBusDevice *dev) |
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{ |
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a9mp_priv_state *s = FROM_SYSBUSGIC(a9mp_priv_state, dev); |
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SysBusDevice *busdev; |
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int i;
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if (s->num_cpu > NCPU) {
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hw_error("a9mp_priv_init: num-cpu may not be more than %d\n", NCPU);
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} |
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gic_init(&s->gic, s->num_cpu, s->num_irq); |
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s->mptimer = qdev_create(NULL, "arm_mptimer"); |
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qdev_prop_set_uint32(s->mptimer, "num-cpu", s->num_cpu);
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qdev_init_nofail(s->mptimer); |
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busdev = sysbus_from_qdev(s->mptimer); |
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/* Memory map (addresses are offsets from PERIPHBASE):
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* 0x0000-0x00ff -- Snoop Control Unit
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* 0x0100-0x01ff -- GIC CPU interface
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* 0x0200-0x02ff -- Global Timer
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* 0x0300-0x05ff -- nothing
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* 0x0600-0x06ff -- private timers and watchdogs
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* 0x0700-0x0fff -- nothing
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* 0x1000-0x1fff -- GIC Distributor
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*
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* We should implement the global timer but don't currently do so.
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*/
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memory_region_init(&s->container, "a9mp-priv-container", 0x2000); |
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memory_region_init_io(&s->scu_iomem, &a9_scu_ops, s, "a9mp-scu", 0x100); |
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memory_region_add_subregion(&s->container, 0, &s->scu_iomem);
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/* GIC CPU interface */
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memory_region_add_subregion(&s->container, 0x100, &s->gic.cpuiomem[0]); |
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/* Note that the A9 exposes only the "timer/watchdog for this core"
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* memory region, not the "timer/watchdog for core X" ones 11MPcore has.
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*/
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memory_region_add_subregion(&s->container, 0x600,
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sysbus_mmio_get_region(busdev, 0));
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memory_region_add_subregion(&s->container, 0x620,
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sysbus_mmio_get_region(busdev, 1));
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memory_region_add_subregion(&s->container, 0x1000, &s->gic.iomem);
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sysbus_init_mmio(dev, &s->container); |
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/* Wire up the interrupt from each watchdog and timer. */
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s->timer_irq = qemu_allocate_irqs(a9mpcore_timer_irq_handler, |
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s, (s->num_cpu + 1) * 2); |
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for (i = 0; i < s->num_cpu * 2; i++) { |
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sysbus_connect_irq(busdev, i, s->timer_irq[i]); |
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} |
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return 0; |
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} |
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static const VMStateDescription vmstate_a9mp_priv = { |
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.name = "a9mpcore_priv",
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.version_id = 2,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) { |
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VMSTATE_UINT32(scu_control, a9mp_priv_state), |
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VMSTATE_UINT32_ARRAY(old_timer_status, a9mp_priv_state, 8),
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VMSTATE_UINT32_V(scu_status, a9mp_priv_state, 2),
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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static Property a9mp_priv_properties[] = {
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DEFINE_PROP_UINT32("num-cpu", a9mp_priv_state, num_cpu, 1), |
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/* The Cortex-A9MP may have anything from 0 to 224 external interrupt
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* IRQ lines (with another 32 internal). We default to 64+32, which
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* is the number provided by the Cortex-A9MP test chip in the
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* Realview PBX-A9 and Versatile Express A9 development boards.
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* Other boards may differ and should set this property appropriately.
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*/
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DEFINE_PROP_UINT32("num-irq", a9mp_priv_state, num_irq, 96), |
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DEFINE_PROP_END_OF_LIST(), |
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}; |
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static void a9mp_priv_class_init(ObjectClass *klass, void *data) |
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{ |
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DeviceClass *dc = DEVICE_CLASS(klass); |
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SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
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k->init = a9mp_priv_init; |
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dc->props = a9mp_priv_properties; |
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dc->vmsd = &vmstate_a9mp_priv; |
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dc->reset = a9mp_priv_reset; |
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} |
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static TypeInfo a9mp_priv_info = {
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.name = "a9mpcore_priv",
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.parent = TYPE_SYS_BUS_DEVICE, |
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.instance_size = sizeof(a9mp_priv_state),
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.class_init = a9mp_priv_class_init, |
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}; |
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static void a9mp_register_types(void) |
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{ |
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type_register_static(&a9mp_priv_info); |
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} |
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type_init(a9mp_register_types) |