diff options
Diffstat (limited to 'hw/intc/arm_gic.c')
| -rw-r--r-- | hw/intc/arm_gic.c | 179 |
1 files changed, 147 insertions, 32 deletions
diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c index 1c4a1143af..93eaa6b2fa 100644 --- a/hw/intc/arm_gic.c +++ b/hw/intc/arm_gic.c @@ -66,7 +66,7 @@ void gic_update(GICState *s) best_prio = 0x100; best_irq = 1023; for (irq = 0; irq < s->num_irq; irq++) { - if (GIC_TEST_ENABLED(irq, cm) && GIC_TEST_PENDING(irq, cm)) { + if (GIC_TEST_ENABLED(irq, cm) && gic_test_pending(s, irq, cm)) { if (GIC_GET_PRIORITY(irq, cpu) < best_prio) { best_prio = GIC_GET_PRIORITY(irq, cpu); best_irq = irq; @@ -89,14 +89,43 @@ void gic_set_pending_private(GICState *s, int cpu, int irq) { int cm = 1 << cpu; - if (GIC_TEST_PENDING(irq, cm)) + if (gic_test_pending(s, irq, cm)) { return; + } DPRINTF("Set %d pending cpu %d\n", irq, cpu); GIC_SET_PENDING(irq, cm); gic_update(s); } +static void gic_set_irq_11mpcore(GICState *s, int irq, int level, + int cm, int target) +{ + if (level) { + GIC_SET_LEVEL(irq, cm); + if (GIC_TEST_EDGE_TRIGGER(irq) || GIC_TEST_ENABLED(irq, cm)) { + DPRINTF("Set %d pending mask %x\n", irq, target); + GIC_SET_PENDING(irq, target); + } + } else { + GIC_CLEAR_LEVEL(irq, cm); + } +} + +static void gic_set_irq_generic(GICState *s, int irq, int level, + int cm, int target) +{ + if (level) { + GIC_SET_LEVEL(irq, cm); + DPRINTF("Set %d pending mask %x\n", irq, target); + if (GIC_TEST_EDGE_TRIGGER(irq)) { + GIC_SET_PENDING(irq, target); + } + } else { + GIC_CLEAR_LEVEL(irq, cm); + } +} + /* Process a change in an external IRQ input. */ static void gic_set_irq(void *opaque, int irq, int level) { @@ -122,19 +151,18 @@ static void gic_set_irq(void *opaque, int irq, int level) target = cm; } + assert(irq >= GIC_NR_SGIS); + if (level == GIC_TEST_LEVEL(irq, cm)) { return; } - if (level) { - GIC_SET_LEVEL(irq, cm); - if (GIC_TEST_EDGE_TRIGGER(irq) || GIC_TEST_ENABLED(irq, cm)) { - DPRINTF("Set %d pending mask %x\n", irq, target); - GIC_SET_PENDING(irq, target); - } + if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) { + gic_set_irq_11mpcore(s, irq, level, cm, target); } else { - GIC_CLEAR_LEVEL(irq, cm); + gic_set_irq_generic(s, irq, level, cm, target); } + gic_update(s); } @@ -151,21 +179,48 @@ static void gic_set_running_irq(GICState *s, int cpu, int irq) uint32_t gic_acknowledge_irq(GICState *s, int cpu) { - int new_irq; + int ret, irq, src; int cm = 1 << cpu; - new_irq = s->current_pending[cpu]; - if (new_irq == 1023 - || GIC_GET_PRIORITY(new_irq, cpu) >= s->running_priority[cpu]) { + irq = s->current_pending[cpu]; + if (irq == 1023 + || GIC_GET_PRIORITY(irq, cpu) >= s->running_priority[cpu]) { DPRINTF("ACK no pending IRQ\n"); return 1023; } - s->last_active[new_irq][cpu] = s->running_irq[cpu]; - /* Clear pending flags for both level and edge triggered interrupts. - Level triggered IRQs will be reasserted once they become inactive. */ - GIC_CLEAR_PENDING(new_irq, GIC_TEST_MODEL(new_irq) ? ALL_CPU_MASK : cm); - gic_set_running_irq(s, cpu, new_irq); - DPRINTF("ACK %d\n", new_irq); - return new_irq; + s->last_active[irq][cpu] = s->running_irq[cpu]; + + if (s->revision == REV_11MPCORE) { + /* Clear pending flags for both level and edge triggered interrupts. + * Level triggered IRQs will be reasserted once they become inactive. + */ + GIC_CLEAR_PENDING(irq, GIC_TEST_MODEL(irq) ? ALL_CPU_MASK : cm); + ret = irq; + } else { + if (irq < GIC_NR_SGIS) { + /* Lookup the source CPU for the SGI and clear this in the + * sgi_pending map. Return the src and clear the overall pending + * state on this CPU if the SGI is not pending from any CPUs. + */ + assert(s->sgi_pending[irq][cpu] != 0); + src = ctz32(s->sgi_pending[irq][cpu]); + s->sgi_pending[irq][cpu] &= ~(1 << src); + if (s->sgi_pending[irq][cpu] == 0) { + GIC_CLEAR_PENDING(irq, GIC_TEST_MODEL(irq) ? ALL_CPU_MASK : cm); + } + ret = irq | ((src & 0x7) << 10); + } else { + /* Clear pending state for both level and edge triggered + * interrupts. (level triggered interrupts with an active line + * remain pending, see gic_test_pending) + */ + GIC_CLEAR_PENDING(irq, GIC_TEST_MODEL(irq) ? ALL_CPU_MASK : cm); + ret = irq; + } + } + + gic_set_running_irq(s, cpu, irq); + DPRINTF("ACK %d\n", irq); + return ret; } void gic_set_priority(GICState *s, int cpu, int irq, uint8_t val) @@ -195,14 +250,18 @@ void gic_complete_irq(GICState *s, int cpu, int irq) } if (s->running_irq[cpu] == 1023) return; /* No active IRQ. */ - /* Mark level triggered interrupts as pending if they are still - raised. */ - if (!GIC_TEST_EDGE_TRIGGER(irq) && GIC_TEST_ENABLED(irq, cm) - && GIC_TEST_LEVEL(irq, cm) && (GIC_TARGET(irq) & cm) != 0) { - DPRINTF("Set %d pending mask %x\n", irq, cm); - GIC_SET_PENDING(irq, cm); - update = 1; + + if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) { + /* Mark level triggered interrupts as pending if they are still + raised. */ + if (!GIC_TEST_EDGE_TRIGGER(irq) && GIC_TEST_ENABLED(irq, cm) + && GIC_TEST_LEVEL(irq, cm) && (GIC_TARGET(irq) & cm) != 0) { + DPRINTF("Set %d pending mask %x\n", irq, cm); + GIC_SET_PENDING(irq, cm); + update = 1; + } } + if (irq != s->running_irq[cpu]) { /* Complete an IRQ that is not currently running. */ int tmp = s->running_irq[cpu]; @@ -273,7 +332,7 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset) res = 0; mask = (irq < GIC_INTERNAL) ? cm : ALL_CPU_MASK; for (i = 0; i < 8; i++) { - if (GIC_TEST_PENDING(irq + i, mask)) { + if (gic_test_pending(s, irq + i, mask)) { res |= (1 << i); } } @@ -323,6 +382,22 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset) if (GIC_TEST_EDGE_TRIGGER(irq + i)) res |= (2 << (i * 2)); } + } else if (offset < 0xf10) { + goto bad_reg; + } else if (offset < 0xf30) { + if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) { + goto bad_reg; + } + + if (offset < 0xf20) { + /* GICD_CPENDSGIRn */ + irq = (offset - 0xf10); + } else { + irq = (offset - 0xf20); + /* GICD_SPENDSGIRn */ + } + + res = s->sgi_pending[irq][cpu]; } else if (offset < 0xfe0) { goto bad_reg; } else /* offset >= 0xfe0 */ { @@ -497,9 +572,31 @@ static void gic_dist_writeb(void *opaque, hwaddr offset, GIC_CLEAR_EDGE_TRIGGER(irq + i); } } - } else { + } else if (offset < 0xf10) { /* 0xf00 is only handled for 32-bit writes. */ goto bad_reg; + } else if (offset < 0xf20) { + /* GICD_CPENDSGIRn */ + if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) { + goto bad_reg; + } + irq = (offset - 0xf10); + + s->sgi_pending[irq][cpu] &= ~value; + if (s->sgi_pending[irq][cpu] == 0) { + GIC_CLEAR_PENDING(irq, 1 << cpu); + } + } else if (offset < 0xf30) { + /* GICD_SPENDSGIRn */ + if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) { + goto bad_reg; + } + irq = (offset - 0xf20); + + GIC_SET_PENDING(irq, 1 << cpu); + s->sgi_pending[irq][cpu] |= value; + } else { + goto bad_reg; } gic_update(s); return; @@ -523,6 +620,7 @@ static void gic_dist_writel(void *opaque, hwaddr offset, int cpu; int irq; int mask; + int target_cpu; cpu = gic_get_current_cpu(s); irq = value & 0x3ff; @@ -542,6 +640,12 @@ static void gic_dist_writel(void *opaque, hwaddr offset, break; } GIC_SET_PENDING(irq, mask); + target_cpu = ctz32(mask); + while (target_cpu < GIC_NCPU) { + s->sgi_pending[irq][target_cpu] |= (1 << cpu); + mask &= ~(1 << target_cpu); + target_cpu = ctz32(mask); + } gic_update(s); return; } @@ -565,14 +669,17 @@ static uint32_t gic_cpu_read(GICState *s, int cpu, int offset) case 0x04: /* Priority mask */ return s->priority_mask[cpu]; case 0x08: /* Binary Point */ - /* ??? Not implemented. */ - return 0; + return s->bpr[cpu]; case 0x0c: /* Acknowledge */ return gic_acknowledge_irq(s, cpu); case 0x14: /* Running Priority */ return s->running_priority[cpu]; case 0x18: /* Highest Pending Interrupt */ return s->current_pending[cpu]; + case 0x1c: /* Aliased Binary Point */ + return s->abpr[cpu]; + case 0xd0: case 0xd4: case 0xd8: case 0xdc: + return s->apr[(offset - 0xd0) / 4][cpu]; default: qemu_log_mask(LOG_GUEST_ERROR, "gic_cpu_read: Bad offset %x\n", (int)offset); @@ -591,10 +698,18 @@ static void gic_cpu_write(GICState *s, int cpu, int offset, uint32_t value) s->priority_mask[cpu] = (value & 0xff); break; case 0x08: /* Binary Point */ - /* ??? Not implemented. */ + s->bpr[cpu] = (value & 0x7); break; case 0x10: /* End Of Interrupt */ return gic_complete_irq(s, cpu, value & 0x3ff); + case 0x1c: /* Aliased Binary Point */ + if (s->revision >= 2) { + s->abpr[cpu] = (value & 0x7); + } + break; + case 0xd0: case 0xd4: case 0xd8: case 0xdc: + qemu_log_mask(LOG_UNIMP, "Writing APR not implemented\n"); + break; default: qemu_log_mask(LOG_GUEST_ERROR, "gic_cpu_write: Bad offset %x\n", (int)offset); |