* armv7m_nvic device.
*/
+#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "gic_internal.h"
#include "qom/cpu.h"
#define DPRINTF(fmt, ...) do {} while(0)
#endif
-static const uint8_t gic_id[] = {
- 0x90, 0x13, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1
+static const uint8_t gic_id_11mpcore[] = {
+ 0x00, 0x00, 0x00, 0x00, 0x90, 0x13, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1
};
-#define NUM_CPU(s) ((s)->num_cpu)
+static const uint8_t gic_id_gicv1[] = {
+ 0x04, 0x00, 0x00, 0x00, 0x90, 0xb3, 0x1b, 0x00, 0x0d, 0xf0, 0x05, 0xb1
+};
+
+static const uint8_t gic_id_gicv2[] = {
+ 0x04, 0x00, 0x00, 0x00, 0x90, 0xb4, 0x2b, 0x00, 0x0d, 0xf0, 0x05, 0xb1
+};
static inline int gic_get_current_cpu(GICState *s)
{
return 0;
}
+/* Return true if this GIC config has interrupt groups, which is
+ * true if we're a GICv2, or a GICv1 with the security extensions.
+ */
+static inline bool gic_has_groups(GICState *s)
+{
+ return s->revision == 2 || s->security_extn;
+}
+
/* TODO: Many places that call this routine could be optimized. */
/* Update interrupt status after enabled or pending bits have been changed. */
void gic_update(GICState *s)
int best_irq;
int best_prio;
int irq;
- int level;
+ int irq_level, fiq_level;
int cpu;
int cm;
- for (cpu = 0; cpu < NUM_CPU(s); cpu++) {
+ for (cpu = 0; cpu < s->num_cpu; cpu++) {
cm = 1 << cpu;
s->current_pending[cpu] = 1023;
- if (!s->enabled || !s->cpu_enabled[cpu]) {
+ if (!(s->ctlr & (GICD_CTLR_EN_GRP0 | GICD_CTLR_EN_GRP1))
+ || !(s->cpu_ctlr[cpu] & (GICC_CTLR_EN_GRP0 | GICC_CTLR_EN_GRP1))) {
qemu_irq_lower(s->parent_irq[cpu]);
- return;
+ qemu_irq_lower(s->parent_fiq[cpu]);
+ continue;
}
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) &&
+ (irq < GIC_INTERNAL || GIC_TARGET(irq) & cm)) {
if (GIC_GET_PRIORITY(irq, cpu) < best_prio) {
best_prio = GIC_GET_PRIORITY(irq, cpu);
best_irq = irq;
}
}
}
- level = 0;
+
+ irq_level = fiq_level = 0;
+
if (best_prio < s->priority_mask[cpu]) {
s->current_pending[cpu] = best_irq;
if (best_prio < s->running_priority[cpu]) {
- DPRINTF("Raised pending IRQ %d (cpu %d)\n", best_irq, cpu);
- level = 1;
+ int group = GIC_TEST_GROUP(best_irq, cm);
+
+ if (extract32(s->ctlr, group, 1) &&
+ extract32(s->cpu_ctlr[cpu], group, 1)) {
+ if (group == 0 && s->cpu_ctlr[cpu] & GICC_CTLR_FIQ_EN) {
+ DPRINTF("Raised pending FIQ %d (cpu %d)\n",
+ best_irq, cpu);
+ fiq_level = 1;
+ } else {
+ DPRINTF("Raised pending IRQ %d (cpu %d)\n",
+ best_irq, cpu);
+ irq_level = 1;
+ }
+ }
}
}
- qemu_set_irq(s->parent_irq[cpu], level);
+
+ qemu_set_irq(s->parent_irq[cpu], irq_level);
+ qemu_set_irq(s->parent_fiq[cpu], fiq_level);
}
}
{
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)
{
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);
}
-static void gic_set_running_irq(GICState *s, int cpu, int irq)
+static uint16_t gic_get_current_pending_irq(GICState *s, int cpu,
+ MemTxAttrs attrs)
+{
+ uint16_t pending_irq = s->current_pending[cpu];
+
+ if (pending_irq < GIC_MAXIRQ && gic_has_groups(s)) {
+ int group = GIC_TEST_GROUP(pending_irq, (1 << cpu));
+ /* On a GIC without the security extensions, reading this register
+ * behaves in the same way as a secure access to a GIC with them.
+ */
+ bool secure = !s->security_extn || attrs.secure;
+
+ if (group == 0 && !secure) {
+ /* Group0 interrupts hidden from Non-secure access */
+ return 1023;
+ }
+ if (group == 1 && secure && !(s->cpu_ctlr[cpu] & GICC_CTLR_ACK_CTL)) {
+ /* Group1 interrupts only seen by Secure access if
+ * AckCtl bit set.
+ */
+ return 1022;
+ }
+ }
+ return pending_irq;
+}
+
+static int gic_get_group_priority(GICState *s, int cpu, int irq)
+{
+ /* Return the group priority of the specified interrupt
+ * (which is the top bits of its priority, with the number
+ * of bits masked determined by the applicable binary point register).
+ */
+ int bpr;
+ uint32_t mask;
+
+ if (gic_has_groups(s) &&
+ !(s->cpu_ctlr[cpu] & GICC_CTLR_CBPR) &&
+ GIC_TEST_GROUP(irq, (1 << cpu))) {
+ bpr = s->abpr[cpu];
+ } else {
+ bpr = s->bpr[cpu];
+ }
+
+ /* a BPR of 0 means the group priority bits are [7:1];
+ * a BPR of 1 means they are [7:2], and so on down to
+ * a BPR of 7 meaning no group priority bits at all.
+ */
+ mask = ~0U << ((bpr & 7) + 1);
+
+ return GIC_GET_PRIORITY(irq, cpu) & mask;
+}
+
+static void gic_activate_irq(GICState *s, int cpu, int irq)
{
- s->running_irq[cpu] = irq;
- if (irq == 1023) {
- s->running_priority[cpu] = 0x100;
+ /* Set the appropriate Active Priority Register bit for this IRQ,
+ * and update the running priority.
+ */
+ int prio = gic_get_group_priority(s, cpu, irq);
+ int preemption_level = prio >> (GIC_MIN_BPR + 1);
+ int regno = preemption_level / 32;
+ int bitno = preemption_level % 32;
+
+ if (gic_has_groups(s) && GIC_TEST_GROUP(irq, (1 << cpu))) {
+ s->nsapr[regno][cpu] |= (1 << bitno);
} else {
- s->running_priority[cpu] = GIC_GET_PRIORITY(irq, cpu);
+ s->apr[regno][cpu] |= (1 << bitno);
}
- gic_update(s);
+
+ s->running_priority[cpu] = prio;
+ GIC_SET_ACTIVE(irq, 1 << cpu);
+}
+
+static int gic_get_prio_from_apr_bits(GICState *s, int cpu)
+{
+ /* Recalculate the current running priority for this CPU based
+ * on the set bits in the Active Priority Registers.
+ */
+ int i;
+ for (i = 0; i < GIC_NR_APRS; i++) {
+ uint32_t apr = s->apr[i][cpu] | s->nsapr[i][cpu];
+ if (!apr) {
+ continue;
+ }
+ return (i * 32 + ctz32(apr)) << (GIC_MIN_BPR + 1);
+ }
+ return 0x100;
}
-uint32_t gic_acknowledge_irq(GICState *s, int cpu)
+static void gic_drop_prio(GICState *s, int cpu, int group)
{
- int new_irq;
+ /* Drop the priority of the currently active interrupt in the
+ * specified group.
+ *
+ * Note that we can guarantee (because of the requirement to nest
+ * GICC_IAR reads [which activate an interrupt and raise priority]
+ * with GICC_EOIR writes [which drop the priority for the interrupt])
+ * that the interrupt we're being called for is the highest priority
+ * active interrupt, meaning that it has the lowest set bit in the
+ * APR registers.
+ *
+ * If the guest does not honour the ordering constraints then the
+ * behaviour of the GIC is UNPREDICTABLE, which for us means that
+ * the values of the APR registers might become incorrect and the
+ * running priority will be wrong, so interrupts that should preempt
+ * might not do so, and interrupts that should not preempt might do so.
+ */
+ int i;
+
+ for (i = 0; i < GIC_NR_APRS; i++) {
+ uint32_t *papr = group ? &s->nsapr[i][cpu] : &s->apr[i][cpu];
+ if (!*papr) {
+ continue;
+ }
+ /* Clear lowest set bit */
+ *papr &= *papr - 1;
+ break;
+ }
+
+ s->running_priority[cpu] = gic_get_prio_from_apr_bits(s, cpu);
+}
+
+uint32_t gic_acknowledge_irq(GICState *s, int cpu, MemTxAttrs attrs)
+{
+ 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]) {
- DPRINTF("ACK no pending IRQ\n");
+
+ /* gic_get_current_pending_irq() will return 1022 or 1023 appropriately
+ * for the case where this GIC supports grouping and the pending interrupt
+ * is in the wrong group.
+ */
+ irq = gic_get_current_pending_irq(s, cpu, attrs);
+
+ if (irq >= GIC_MAXIRQ) {
+ DPRINTF("ACK, no pending interrupt or it is hidden: %d\n", irq);
+ return irq;
+ }
+
+ if (GIC_GET_PRIORITY(irq, cpu) >= s->running_priority[cpu]) {
+ DPRINTF("ACK, pending interrupt (%d) has insufficient priority\n", irq);
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;
+
+ if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+ /* 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_activate_irq(s, cpu, irq);
+ gic_update(s);
+ DPRINTF("ACK %d\n", irq);
+ return ret;
}
-void gic_set_priority(GICState *s, int cpu, int irq, uint8_t val)
+void gic_set_priority(GICState *s, int cpu, int irq, uint8_t val,
+ MemTxAttrs attrs)
{
+ if (s->security_extn && !attrs.secure) {
+ if (!GIC_TEST_GROUP(irq, (1 << cpu))) {
+ return; /* Ignore Non-secure access of Group0 IRQ */
+ }
+ val = 0x80 | (val >> 1); /* Non-secure view */
+ }
+
if (irq < GIC_INTERNAL) {
s->priority1[irq][cpu] = val;
} else {
}
}
-void gic_complete_irq(GICState *s, int cpu, int irq)
+static uint32_t gic_get_priority(GICState *s, int cpu, int irq,
+ MemTxAttrs attrs)
+{
+ uint32_t prio = GIC_GET_PRIORITY(irq, cpu);
+
+ if (s->security_extn && !attrs.secure) {
+ if (!GIC_TEST_GROUP(irq, (1 << cpu))) {
+ return 0; /* Non-secure access cannot read priority of Group0 IRQ */
+ }
+ prio = (prio << 1) & 0xff; /* Non-secure view */
+ }
+ return prio;
+}
+
+static void gic_set_priority_mask(GICState *s, int cpu, uint8_t pmask,
+ MemTxAttrs attrs)
+{
+ if (s->security_extn && !attrs.secure) {
+ if (s->priority_mask[cpu] & 0x80) {
+ /* Priority Mask in upper half */
+ pmask = 0x80 | (pmask >> 1);
+ } else {
+ /* Non-secure write ignored if priority mask is in lower half */
+ return;
+ }
+ }
+ s->priority_mask[cpu] = pmask;
+}
+
+static uint32_t gic_get_priority_mask(GICState *s, int cpu, MemTxAttrs attrs)
+{
+ uint32_t pmask = s->priority_mask[cpu];
+
+ if (s->security_extn && !attrs.secure) {
+ if (pmask & 0x80) {
+ /* Priority Mask in upper half, return Non-secure view */
+ pmask = (pmask << 1) & 0xff;
+ } else {
+ /* Priority Mask in lower half, RAZ */
+ pmask = 0;
+ }
+ }
+ return pmask;
+}
+
+static uint32_t gic_get_cpu_control(GICState *s, int cpu, MemTxAttrs attrs)
+{
+ uint32_t ret = s->cpu_ctlr[cpu];
+
+ if (s->security_extn && !attrs.secure) {
+ /* Construct the NS banked view of GICC_CTLR from the correct
+ * bits of the S banked view. We don't need to move the bypass
+ * control bits because we don't implement that (IMPDEF) part
+ * of the GIC architecture.
+ */
+ ret = (ret & (GICC_CTLR_EN_GRP1 | GICC_CTLR_EOIMODE_NS)) >> 1;
+ }
+ return ret;
+}
+
+static void gic_set_cpu_control(GICState *s, int cpu, uint32_t value,
+ MemTxAttrs attrs)
+{
+ uint32_t mask;
+
+ if (s->security_extn && !attrs.secure) {
+ /* The NS view can only write certain bits in the register;
+ * the rest are unchanged
+ */
+ mask = GICC_CTLR_EN_GRP1;
+ if (s->revision == 2) {
+ mask |= GICC_CTLR_EOIMODE_NS;
+ }
+ s->cpu_ctlr[cpu] &= ~mask;
+ s->cpu_ctlr[cpu] |= (value << 1) & mask;
+ } else {
+ if (s->revision == 2) {
+ mask = s->security_extn ? GICC_CTLR_V2_S_MASK : GICC_CTLR_V2_MASK;
+ } else {
+ mask = s->security_extn ? GICC_CTLR_V1_S_MASK : GICC_CTLR_V1_MASK;
+ }
+ s->cpu_ctlr[cpu] = value & mask;
+ }
+ DPRINTF("CPU Interface %d: Group0 Interrupts %sabled, "
+ "Group1 Interrupts %sabled\n", cpu,
+ (s->cpu_ctlr[cpu] & GICC_CTLR_EN_GRP0) ? "En" : "Dis",
+ (s->cpu_ctlr[cpu] & GICC_CTLR_EN_GRP1) ? "En" : "Dis");
+}
+
+static uint8_t gic_get_running_priority(GICState *s, int cpu, MemTxAttrs attrs)
+{
+ if (s->security_extn && !attrs.secure) {
+ if (s->running_priority[cpu] & 0x80) {
+ /* Running priority in upper half of range: return the Non-secure
+ * view of the priority.
+ */
+ return s->running_priority[cpu] << 1;
+ } else {
+ /* Running priority in lower half of range: RAZ */
+ return 0;
+ }
+ } else {
+ return s->running_priority[cpu];
+ }
+}
+
+void gic_complete_irq(GICState *s, int cpu, int irq, MemTxAttrs attrs)
{
- int update = 0;
int cm = 1 << cpu;
+ int group;
+
DPRINTF("EOI %d\n", irq);
if (irq >= s->num_irq) {
/* This handles two cases:
*/
return;
}
- if (s->running_irq[cpu] == 1023)
+ if (s->running_priority[cpu] == 0x100) {
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 (irq != s->running_irq[cpu]) {
- /* Complete an IRQ that is not currently running. */
- int tmp = s->running_irq[cpu];
- while (s->last_active[tmp][cpu] != 1023) {
- if (s->last_active[tmp][cpu] == irq) {
- s->last_active[tmp][cpu] = s->last_active[irq][cpu];
- break;
- }
- tmp = s->last_active[tmp][cpu];
- }
- if (update) {
- gic_update(s);
+ }
+
+ 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);
}
- } else {
- /* Complete the current running IRQ. */
- gic_set_running_irq(s, cpu, s->last_active[s->running_irq[cpu]][cpu]);
}
+
+ group = gic_has_groups(s) && GIC_TEST_GROUP(irq, cm);
+
+ if (s->security_extn && !attrs.secure && !group) {
+ DPRINTF("Non-secure EOI for Group0 interrupt %d ignored\n", irq);
+ return;
+ }
+
+ /* Secure EOI with GICC_CTLR.AckCtl == 0 when the IRQ is a Group 1
+ * interrupt is UNPREDICTABLE. We choose to handle it as if AckCtl == 1,
+ * i.e. go ahead and complete the irq anyway.
+ */
+
+ gic_drop_prio(s, cpu, group);
+ GIC_CLEAR_ACTIVE(irq, cm);
+ gic_update(s);
}
-static uint32_t gic_dist_readb(void *opaque, hwaddr offset)
+static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs)
{
GICState *s = (GICState *)opaque;
uint32_t res;
cpu = gic_get_current_cpu(s);
cm = 1 << cpu;
if (offset < 0x100) {
- if (offset == 0)
- return s->enabled;
+ if (offset == 0) { /* GICD_CTLR */
+ if (s->security_extn && !attrs.secure) {
+ /* The NS bank of this register is just an alias of the
+ * EnableGrp1 bit in the S bank version.
+ */
+ return extract32(s->ctlr, 1, 1);
+ } else {
+ return s->ctlr;
+ }
+ }
if (offset == 4)
- return ((s->num_irq / 32) - 1) | ((NUM_CPU(s) - 1) << 5);
+ /* Interrupt Controller Type Register */
+ return ((s->num_irq / 32) - 1)
+ | ((s->num_cpu - 1) << 5)
+ | (s->security_extn << 10);
if (offset < 0x08)
return 0;
if (offset >= 0x80) {
- /* Interrupt Security , RAZ/WI */
- return 0;
+ /* Interrupt Group Registers: these RAZ/WI if this is an NS
+ * access to a GIC with the security extensions, or if the GIC
+ * doesn't have groups at all.
+ */
+ res = 0;
+ if (!(s->security_extn && !attrs.secure) && gic_has_groups(s)) {
+ /* Every byte offset holds 8 group status bits */
+ irq = (offset - 0x080) * 8 + GIC_BASE_IRQ;
+ if (irq >= s->num_irq) {
+ goto bad_reg;
+ }
+ for (i = 0; i < 8; i++) {
+ if (GIC_TEST_GROUP(irq + i, cm)) {
+ res |= (1 << i);
+ }
+ }
+ }
+ return res;
}
goto bad_reg;
} else if (offset < 0x200) {
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);
}
}
irq = (offset - 0x400) + GIC_BASE_IRQ;
if (irq >= s->num_irq)
goto bad_reg;
- res = GIC_GET_PRIORITY(irq, cpu);
+ res = gic_get_priority(s, cpu, irq, attrs);
} else if (offset < 0xc00) {
/* Interrupt CPU Target. */
if (s->num_cpu == 1 && s->revision != REV_11MPCORE) {
}
} else if (offset < 0xf00) {
/* Interrupt Configuration. */
- irq = (offset - 0xc00) * 2 + GIC_BASE_IRQ;
+ irq = (offset - 0xc00) * 4 + GIC_BASE_IRQ;
if (irq >= s->num_irq)
goto bad_reg;
res = 0;
if (GIC_TEST_EDGE_TRIGGER(irq + i))
res |= (2 << (i * 2));
}
- } else if (offset < 0xfe0) {
+ } 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 < 0xfd0) {
goto bad_reg;
- } else /* offset >= 0xfe0 */ {
+ } else if (offset < 0x1000) {
if (offset & 3) {
res = 0;
} else {
- res = gic_id[(offset - 0xfe0) >> 2];
+ switch (s->revision) {
+ case REV_11MPCORE:
+ res = gic_id_11mpcore[(offset - 0xfd0) >> 2];
+ break;
+ case 1:
+ res = gic_id_gicv1[(offset - 0xfd0) >> 2];
+ break;
+ case 2:
+ res = gic_id_gicv2[(offset - 0xfd0) >> 2];
+ break;
+ case REV_NVIC:
+ /* Shouldn't be able to get here */
+ abort();
+ default:
+ res = 0;
+ }
}
+ } else {
+ g_assert_not_reached();
}
return res;
bad_reg:
return 0;
}
-static uint32_t gic_dist_readw(void *opaque, hwaddr offset)
+static MemTxResult gic_dist_read(void *opaque, hwaddr offset, uint64_t *data,
+ unsigned size, MemTxAttrs attrs)
{
- uint32_t val;
- val = gic_dist_readb(opaque, offset);
- val |= gic_dist_readb(opaque, offset + 1) << 8;
- return val;
-}
-
-static uint32_t gic_dist_readl(void *opaque, hwaddr offset)
-{
- uint32_t val;
- val = gic_dist_readw(opaque, offset);
- val |= gic_dist_readw(opaque, offset + 2) << 16;
- return val;
+ switch (size) {
+ case 1:
+ *data = gic_dist_readb(opaque, offset, attrs);
+ return MEMTX_OK;
+ case 2:
+ *data = gic_dist_readb(opaque, offset, attrs);
+ *data |= gic_dist_readb(opaque, offset + 1, attrs) << 8;
+ return MEMTX_OK;
+ case 4:
+ *data = gic_dist_readb(opaque, offset, attrs);
+ *data |= gic_dist_readb(opaque, offset + 1, attrs) << 8;
+ *data |= gic_dist_readb(opaque, offset + 2, attrs) << 16;
+ *data |= gic_dist_readb(opaque, offset + 3, attrs) << 24;
+ return MEMTX_OK;
+ default:
+ return MEMTX_ERROR;
+ }
}
static void gic_dist_writeb(void *opaque, hwaddr offset,
- uint32_t value)
+ uint32_t value, MemTxAttrs attrs)
{
GICState *s = (GICState *)opaque;
int irq;
cpu = gic_get_current_cpu(s);
if (offset < 0x100) {
if (offset == 0) {
- s->enabled = (value & 1);
- DPRINTF("Distribution %sabled\n", s->enabled ? "En" : "Dis");
+ if (s->security_extn && !attrs.secure) {
+ /* NS version is just an alias of the S version's bit 1 */
+ s->ctlr = deposit32(s->ctlr, 1, 1, value);
+ } else if (gic_has_groups(s)) {
+ s->ctlr = value & (GICD_CTLR_EN_GRP0 | GICD_CTLR_EN_GRP1);
+ } else {
+ s->ctlr = value & GICD_CTLR_EN_GRP0;
+ }
+ DPRINTF("Distributor: Group0 %sabled; Group 1 %sabled\n",
+ s->ctlr & GICD_CTLR_EN_GRP0 ? "En" : "Dis",
+ s->ctlr & GICD_CTLR_EN_GRP1 ? "En" : "Dis");
} else if (offset < 4) {
/* ignored. */
} else if (offset >= 0x80) {
- /* Interrupt Security Registers, RAZ/WI */
+ /* Interrupt Group Registers: RAZ/WI for NS access to secure
+ * GIC, or for GICs without groups.
+ */
+ if (!(s->security_extn && !attrs.secure) && gic_has_groups(s)) {
+ /* Every byte offset holds 8 group status bits */
+ irq = (offset - 0x80) * 8 + GIC_BASE_IRQ;
+ if (irq >= s->num_irq) {
+ goto bad_reg;
+ }
+ for (i = 0; i < 8; i++) {
+ /* Group bits are banked for private interrupts */
+ int cm = (irq < GIC_INTERNAL) ? (1 << cpu) : ALL_CPU_MASK;
+ if (value & (1 << i)) {
+ /* Group1 (Non-secure) */
+ GIC_SET_GROUP(irq + i, cm);
+ } else {
+ /* Group0 (Secure) */
+ GIC_CLEAR_GROUP(irq + i, cm);
+ }
+ }
+ }
} else {
goto bad_reg;
}
irq = (offset - 0x400) + GIC_BASE_IRQ;
if (irq >= s->num_irq)
goto bad_reg;
- gic_set_priority(s, cpu, irq, value);
+ gic_set_priority(s, cpu, irq, value, attrs);
} else if (offset < 0xc00) {
/* Interrupt CPU Target. RAZ/WI on uniprocessor GICs, with the
* annoying exception of the 11MPCore's GIC.
irq = (offset - 0xc00) * 4 + GIC_BASE_IRQ;
if (irq >= s->num_irq)
goto bad_reg;
- if (irq < GIC_INTERNAL)
+ if (irq < GIC_NR_SGIS)
value |= 0xaa;
for (i = 0; i < 4; i++) {
- if (value & (1 << (i * 2))) {
- GIC_SET_MODEL(irq + i);
- } else {
- GIC_CLEAR_MODEL(irq + i);
+ if (s->revision == REV_11MPCORE || s->revision == REV_NVIC) {
+ if (value & (1 << (i * 2))) {
+ GIC_SET_MODEL(irq + i);
+ } else {
+ GIC_CLEAR_MODEL(irq + i);
+ }
}
if (value & (2 << (i * 2))) {
GIC_SET_EDGE_TRIGGER(irq + i);
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;
}
static void gic_dist_writew(void *opaque, hwaddr offset,
- uint32_t value)
+ uint32_t value, MemTxAttrs attrs)
{
- gic_dist_writeb(opaque, offset, value & 0xff);
- gic_dist_writeb(opaque, offset + 1, value >> 8);
+ gic_dist_writeb(opaque, offset, value & 0xff, attrs);
+ gic_dist_writeb(opaque, offset + 1, value >> 8, attrs);
}
static void gic_dist_writel(void *opaque, hwaddr offset,
- uint32_t value)
+ uint32_t value, MemTxAttrs attrs)
{
GICState *s = (GICState *)opaque;
if (offset == 0xf00) {
int cpu;
int irq;
int mask;
+ int target_cpu;
cpu = gic_get_current_cpu(s);
irq = value & 0x3ff;
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;
}
- gic_dist_writew(opaque, offset, value & 0xffff);
- gic_dist_writew(opaque, offset + 2, value >> 16);
+ gic_dist_writew(opaque, offset, value & 0xffff, attrs);
+ gic_dist_writew(opaque, offset + 2, value >> 16, attrs);
}
-static const MemoryRegionOps gic_dist_ops = {
- .old_mmio = {
- .read = { gic_dist_readb, gic_dist_readw, gic_dist_readl, },
- .write = { gic_dist_writeb, gic_dist_writew, gic_dist_writel, },
- },
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
+static MemTxResult gic_dist_write(void *opaque, hwaddr offset, uint64_t data,
+ unsigned size, MemTxAttrs attrs)
+{
+ switch (size) {
+ case 1:
+ gic_dist_writeb(opaque, offset, data, attrs);
+ return MEMTX_OK;
+ case 2:
+ gic_dist_writew(opaque, offset, data, attrs);
+ return MEMTX_OK;
+ case 4:
+ gic_dist_writel(opaque, offset, data, attrs);
+ return MEMTX_OK;
+ default:
+ return MEMTX_ERROR;
+ }
+}
-static uint32_t gic_cpu_read(GICState *s, int cpu, int offset)
+static inline uint32_t gic_apr_ns_view(GICState *s, int cpu, int regno)
+{
+ /* Return the Nonsecure view of GICC_APR<regno>. This is the
+ * second half of GICC_NSAPR.
+ */
+ switch (GIC_MIN_BPR) {
+ case 0:
+ if (regno < 2) {
+ return s->nsapr[regno + 2][cpu];
+ }
+ break;
+ case 1:
+ if (regno == 0) {
+ return s->nsapr[regno + 1][cpu];
+ }
+ break;
+ case 2:
+ if (regno == 0) {
+ return extract32(s->nsapr[0][cpu], 16, 16);
+ }
+ break;
+ case 3:
+ if (regno == 0) {
+ return extract32(s->nsapr[0][cpu], 8, 8);
+ }
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ return 0;
+}
+
+static inline void gic_apr_write_ns_view(GICState *s, int cpu, int regno,
+ uint32_t value)
+{
+ /* Write the Nonsecure view of GICC_APR<regno>. */
+ switch (GIC_MIN_BPR) {
+ case 0:
+ if (regno < 2) {
+ s->nsapr[regno + 2][cpu] = value;
+ }
+ break;
+ case 1:
+ if (regno == 0) {
+ s->nsapr[regno + 1][cpu] = value;
+ }
+ break;
+ case 2:
+ if (regno == 0) {
+ s->nsapr[0][cpu] = deposit32(s->nsapr[0][cpu], 16, 16, value);
+ }
+ break;
+ case 3:
+ if (regno == 0) {
+ s->nsapr[0][cpu] = deposit32(s->nsapr[0][cpu], 8, 8, value);
+ }
+ break;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static MemTxResult gic_cpu_read(GICState *s, int cpu, int offset,
+ uint64_t *data, MemTxAttrs attrs)
{
switch (offset) {
case 0x00: /* Control */
- return s->cpu_enabled[cpu];
+ *data = gic_get_cpu_control(s, cpu, attrs);
+ break;
case 0x04: /* Priority mask */
- return s->priority_mask[cpu];
+ *data = gic_get_priority_mask(s, cpu, attrs);
+ break;
case 0x08: /* Binary Point */
- /* ??? Not implemented. */
- return 0;
+ if (s->security_extn && !attrs.secure) {
+ /* BPR is banked. Non-secure copy stored in ABPR. */
+ *data = s->abpr[cpu];
+ } else {
+ *data = s->bpr[cpu];
+ }
+ break;
case 0x0c: /* Acknowledge */
- return gic_acknowledge_irq(s, cpu);
+ *data = gic_acknowledge_irq(s, cpu, attrs);
+ break;
case 0x14: /* Running Priority */
- return s->running_priority[cpu];
+ *data = gic_get_running_priority(s, cpu, attrs);
+ break;
case 0x18: /* Highest Pending Interrupt */
- return s->current_pending[cpu];
+ *data = gic_get_current_pending_irq(s, cpu, attrs);
+ break;
+ case 0x1c: /* Aliased Binary Point */
+ /* GIC v2, no security: ABPR
+ * GIC v1, no security: not implemented (RAZ/WI)
+ * With security extensions, secure access: ABPR (alias of NS BPR)
+ * With security extensions, nonsecure access: RAZ/WI
+ */
+ if (!gic_has_groups(s) || (s->security_extn && !attrs.secure)) {
+ *data = 0;
+ } else {
+ *data = s->abpr[cpu];
+ }
+ break;
+ case 0xd0: case 0xd4: case 0xd8: case 0xdc:
+ {
+ int regno = (offset - 0xd0) / 4;
+
+ if (regno >= GIC_NR_APRS || s->revision != 2) {
+ *data = 0;
+ } else if (s->security_extn && !attrs.secure) {
+ /* NS view of GICC_APR<n> is the top half of GIC_NSAPR<n> */
+ *data = gic_apr_ns_view(s, regno, cpu);
+ } else {
+ *data = s->apr[regno][cpu];
+ }
+ break;
+ }
+ case 0xe0: case 0xe4: case 0xe8: case 0xec:
+ {
+ int regno = (offset - 0xe0) / 4;
+
+ if (regno >= GIC_NR_APRS || s->revision != 2 || !gic_has_groups(s) ||
+ (s->security_extn && !attrs.secure)) {
+ *data = 0;
+ } else {
+ *data = s->nsapr[regno][cpu];
+ }
+ break;
+ }
default:
qemu_log_mask(LOG_GUEST_ERROR,
"gic_cpu_read: Bad offset %x\n", (int)offset);
- return 0;
+ return MEMTX_ERROR;
}
+ return MEMTX_OK;
}
-static void gic_cpu_write(GICState *s, int cpu, int offset, uint32_t value)
+static MemTxResult gic_cpu_write(GICState *s, int cpu, int offset,
+ uint32_t value, MemTxAttrs attrs)
{
switch (offset) {
case 0x00: /* Control */
- s->cpu_enabled[cpu] = (value & 1);
- DPRINTF("CPU %d %sabled\n", cpu, s->cpu_enabled[cpu] ? "En" : "Dis");
+ gic_set_cpu_control(s, cpu, value, attrs);
break;
case 0x04: /* Priority mask */
- s->priority_mask[cpu] = (value & 0xff);
+ gic_set_priority_mask(s, cpu, value, attrs);
break;
case 0x08: /* Binary Point */
- /* ??? Not implemented. */
+ if (s->security_extn && !attrs.secure) {
+ s->abpr[cpu] = MAX(value & 0x7, GIC_MIN_ABPR);
+ } else {
+ s->bpr[cpu] = MAX(value & 0x7, GIC_MIN_BPR);
+ }
break;
case 0x10: /* End Of Interrupt */
- return gic_complete_irq(s, cpu, value & 0x3ff);
+ gic_complete_irq(s, cpu, value & 0x3ff, attrs);
+ return MEMTX_OK;
+ case 0x1c: /* Aliased Binary Point */
+ if (!gic_has_groups(s) || (s->security_extn && !attrs.secure)) {
+ /* unimplemented, or NS access: RAZ/WI */
+ return MEMTX_OK;
+ } else {
+ s->abpr[cpu] = MAX(value & 0x7, GIC_MIN_ABPR);
+ }
+ break;
+ case 0xd0: case 0xd4: case 0xd8: case 0xdc:
+ {
+ int regno = (offset - 0xd0) / 4;
+
+ if (regno >= GIC_NR_APRS || s->revision != 2) {
+ return MEMTX_OK;
+ }
+ if (s->security_extn && !attrs.secure) {
+ /* NS view of GICC_APR<n> is the top half of GIC_NSAPR<n> */
+ gic_apr_write_ns_view(s, regno, cpu, value);
+ } else {
+ s->apr[regno][cpu] = value;
+ }
+ break;
+ }
+ case 0xe0: case 0xe4: case 0xe8: case 0xec:
+ {
+ int regno = (offset - 0xe0) / 4;
+
+ if (regno >= GIC_NR_APRS || s->revision != 2) {
+ return MEMTX_OK;
+ }
+ if (!gic_has_groups(s) || (s->security_extn && !attrs.secure)) {
+ return MEMTX_OK;
+ }
+ s->nsapr[regno][cpu] = value;
+ break;
+ }
default:
qemu_log_mask(LOG_GUEST_ERROR,
"gic_cpu_write: Bad offset %x\n", (int)offset);
- return;
+ return MEMTX_ERROR;
}
gic_update(s);
+ return MEMTX_OK;
}
/* Wrappers to read/write the GIC CPU interface for the current CPU */
-static uint64_t gic_thiscpu_read(void *opaque, hwaddr addr,
- unsigned size)
+static MemTxResult gic_thiscpu_read(void *opaque, hwaddr addr, uint64_t *data,
+ unsigned size, MemTxAttrs attrs)
{
GICState *s = (GICState *)opaque;
- return gic_cpu_read(s, gic_get_current_cpu(s), addr);
+ return gic_cpu_read(s, gic_get_current_cpu(s), addr, data, attrs);
}
-static void gic_thiscpu_write(void *opaque, hwaddr addr,
- uint64_t value, unsigned size)
+static MemTxResult gic_thiscpu_write(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size,
+ MemTxAttrs attrs)
{
GICState *s = (GICState *)opaque;
- gic_cpu_write(s, gic_get_current_cpu(s), addr, value);
+ return gic_cpu_write(s, gic_get_current_cpu(s), addr, value, attrs);
}
/* Wrappers to read/write the GIC CPU interface for a specific CPU.
* These just decode the opaque pointer into GICState* + cpu id.
*/
-static uint64_t gic_do_cpu_read(void *opaque, hwaddr addr,
- unsigned size)
+static MemTxResult gic_do_cpu_read(void *opaque, hwaddr addr, uint64_t *data,
+ unsigned size, MemTxAttrs attrs)
{
GICState **backref = (GICState **)opaque;
GICState *s = *backref;
int id = (backref - s->backref);
- return gic_cpu_read(s, id, addr);
+ return gic_cpu_read(s, id, addr, data, attrs);
}
-static void gic_do_cpu_write(void *opaque, hwaddr addr,
- uint64_t value, unsigned size)
+static MemTxResult gic_do_cpu_write(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size,
+ MemTxAttrs attrs)
{
GICState **backref = (GICState **)opaque;
GICState *s = *backref;
int id = (backref - s->backref);
- gic_cpu_write(s, id, addr, value);
+ return gic_cpu_write(s, id, addr, value, attrs);
}
-static const MemoryRegionOps gic_thiscpu_ops = {
- .read = gic_thiscpu_read,
- .write = gic_thiscpu_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
+static const MemoryRegionOps gic_ops[2] = {
+ {
+ .read_with_attrs = gic_dist_read,
+ .write_with_attrs = gic_dist_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ },
+ {
+ .read_with_attrs = gic_thiscpu_read,
+ .write_with_attrs = gic_thiscpu_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ }
};
static const MemoryRegionOps gic_cpu_ops = {
- .read = gic_do_cpu_read,
- .write = gic_do_cpu_write,
+ .read_with_attrs = gic_do_cpu_read,
+ .write_with_attrs = gic_do_cpu_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
-void gic_init_irqs_and_distributor(GICState *s, int num_irq)
+/* This function is used by nvic model */
+void gic_init_irqs_and_distributor(GICState *s)
{
- SysBusDevice *sbd = SYS_BUS_DEVICE(s);
- int i;
-
- i = s->num_irq - GIC_INTERNAL;
- /* For the GIC, also expose incoming GPIO lines for PPIs for each CPU.
- * GPIO array layout is thus:
- * [0..N-1] SPIs
- * [N..N+31] PPIs for CPU 0
- * [N+32..N+63] PPIs for CPU 1
- * ...
- */
- if (s->revision != REV_NVIC) {
- i += (GIC_INTERNAL * s->num_cpu);
- }
- qdev_init_gpio_in(DEVICE(s), gic_set_irq, i);
- for (i = 0; i < NUM_CPU(s); i++) {
- sysbus_init_irq(sbd, &s->parent_irq[i]);
- }
- memory_region_init_io(&s->iomem, OBJECT(s), &gic_dist_ops, s,
- "gic_dist", 0x1000);
+ gic_init_irqs_and_mmio(s, gic_set_irq, gic_ops);
}
static void arm_gic_realize(DeviceState *dev, Error **errp)
GICState *s = ARM_GIC(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
ARMGICClass *agc = ARM_GIC_GET_CLASS(s);
+ Error *local_err = NULL;
- agc->parent_realize(dev, errp);
- if (error_is_set(errp)) {
+ agc->parent_realize(dev, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return;
}
- gic_init_irqs_and_distributor(s, s->num_irq);
+ /* This creates distributor and main CPU interface (s->cpuiomem[0]) */
+ gic_init_irqs_and_mmio(s, gic_set_irq, gic_ops);
- /* Memory regions for the CPU interfaces (NVIC doesn't have these):
- * a region for "CPU interface for this core", then a region for
- * "CPU interface for core 0", "for core 1", ...
+ /* Extra core-specific regions for the CPU interfaces. This is
+ * necessary for "franken-GIC" implementations, for example on
+ * Exynos 4.
* NB that the memory region size of 0x100 applies for the 11MPCore
* and also cores following the GIC v1 spec (ie A9).
* GIC v2 defines a larger memory region (0x1000) so this will need
* to be extended when we implement A15.
*/
- memory_region_init_io(&s->cpuiomem[0], OBJECT(s), &gic_thiscpu_ops, s,
- "gic_cpu", 0x100);
- for (i = 0; i < NUM_CPU(s); i++) {
+ for (i = 0; i < s->num_cpu; i++) {
s->backref[i] = s;
memory_region_init_io(&s->cpuiomem[i+1], OBJECT(s), &gic_cpu_ops,
&s->backref[i], "gic_cpu", 0x100);
- }
- /* Distributor */
- sysbus_init_mmio(sbd, &s->iomem);
- /* cpu interfaces (one for "current cpu" plus one per cpu) */
- for (i = 0; i <= NUM_CPU(s); i++) {
- sysbus_init_mmio(sbd, &s->cpuiomem[i]);
+ sysbus_init_mmio(sbd, &s->cpuiomem[i+1]);
}
}
projects / qemu.git / blobdiff