diff options
Diffstat (limited to 'hw/intc')
| -rw-r--r-- | hw/intc/arm_gic.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c index 492b2421ab..7a34bc0998 100644 --- a/hw/intc/arm_gic.c +++ b/hw/intc/arm_gic.c @@ -941,7 +941,7 @@ static void gic_complete_irq(GICState *s, int cpu, int irq, MemTxAttrs attrs) gic_update(s); } -static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs) +static uint8_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs) { GICState *s = (GICState *)opaque; uint32_t res; @@ -955,6 +955,7 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs) cm = 1 << cpu; if (offset < 0x100) { if (offset == 0) { /* GICD_CTLR */ + /* We rely here on the only non-zero bits being in byte 0 */ 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. @@ -964,13 +965,26 @@ static uint32_t gic_dist_readb(void *opaque, hwaddr offset, MemTxAttrs attrs) return s->ctlr; } } - if (offset == 4) - /* Interrupt Controller Type Register */ - return ((s->num_irq / 32) - 1) - | ((s->num_cpu - 1) << 5) - | (s->security_extn << 10); - if (offset < 0x08) + if (offset == 4) { + /* GICD_TYPER byte 0 */ + return ((s->num_irq / 32) - 1) | ((s->num_cpu - 1) << 5); + } + if (offset == 5) { + /* GICD_TYPER byte 1 */ + return (s->security_extn << 2); + } + if (offset == 8) { + /* GICD_IIDR byte 0 */ + return 0x3b; /* Arm JEP106 identity */ + } + if (offset == 9) { + /* GICD_IIDR byte 1 */ + return 0x04; /* Arm JEP106 identity */ + } + if (offset < 0x0c) { + /* All other bytes in this range are RAZ */ return 0; + } if (offset >= 0x80) { /* Interrupt Group Registers: these RAZ/WI if this is an NS * access to a GIC with the security extensions, or if the GIC |