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MIPS: CMP: Extend IPI handling to CPU number
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This takes the current IPI interrupt assignment from the fix number of 4
to the number of CPUs defined in the system.

Signed-off-by: Tim Anderson <tanderson@mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Tim Anderson authored and Ralf Baechle committed Jul 3, 2009
1 parent 9306c8d commit a214cef
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Showing 2 changed files with 40 additions and 38 deletions.
4 changes: 4 additions & 0 deletions arch/mips/kernel/irq-gic.c
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Original file line number Diff line number Diff line change
Expand Up @@ -247,6 +247,10 @@ static void __init gic_basic_init(void)
if (cpu == X)
continue;

if (cpu == 0 && i != 0 && _intrmap[i].intrnum == 0 &&
_intrmap[i].ipiflag == 0)
continue;

setup_intr(_intrmap[i].intrnum,
_intrmap[i].cpunum,
_intrmap[i].pin,
Expand Down
74 changes: 36 additions & 38 deletions arch/mips/mti-malta/malta-int.c
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Original file line number Diff line number Diff line change
Expand Up @@ -331,6 +331,11 @@ static struct irqaction irq_call = {
.flags = IRQF_DISABLED|IRQF_PERCPU,
.name = "IPI_call"
};

static int gic_resched_int_base;
static int gic_call_int_base;
#define GIC_RESCHED_INT(cpu) (gic_resched_int_base+(cpu))
#define GIC_CALL_INT(cpu) (gic_call_int_base+(cpu))
#endif /* CONFIG_MIPS_MT_SMP */

static struct irqaction i8259irq = {
Expand Down Expand Up @@ -370,7 +375,7 @@ static int __initdata msc_nr_eicirqs = ARRAY_SIZE(msc_eicirqmap);
* Interrupts and CPUs/Core Interrupts. The nature of the External
* Interrupts is also defined here - polarity/trigger.
*/
static struct gic_intr_map gic_intr_map[] = {
static struct gic_intr_map gic_intr_map[GIC_NUM_INTRS] = {
{ GIC_EXT_INTR(0), X, X, X, X, 0 },
{ GIC_EXT_INTR(1), X, X, X, X, 0 },
{ GIC_EXT_INTR(2), X, X, X, X, 0 },
Expand All @@ -387,14 +392,7 @@ static struct gic_intr_map gic_intr_map[] = {
{ GIC_EXT_INTR(13), 0, GIC_MAP_TO_NMI_MSK, GIC_POL_POS, GIC_TRIG_LEVEL, 0 },
{ GIC_EXT_INTR(14), 0, GIC_MAP_TO_NMI_MSK, GIC_POL_POS, GIC_TRIG_LEVEL, 0 },
{ GIC_EXT_INTR(15), X, X, X, X, 0 },
{ GIC_EXT_INTR(16), 0, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
{ GIC_EXT_INTR(17), 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
{ GIC_EXT_INTR(18), 1, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
{ GIC_EXT_INTR(19), 1, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
{ GIC_EXT_INTR(20), 2, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
{ GIC_EXT_INTR(21), 2, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
{ GIC_EXT_INTR(22), 3, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
{ GIC_EXT_INTR(23), 3, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_EDGE, 1 },
/* This is the end of the general interrupts now we do IPI ones */
};
#endif

Expand All @@ -416,14 +414,25 @@ static int __init gcmp_probe(unsigned long addr, unsigned long size)
}

#if defined(CONFIG_MIPS_MT_SMP)
static void __init fill_ipi_map1(int baseintr, int cpu, int cpupin)
{
int intr = baseintr + cpu;
gic_intr_map[intr].intrnum = GIC_EXT_INTR(intr);
gic_intr_map[intr].cpunum = cpu;
gic_intr_map[intr].pin = cpupin;
gic_intr_map[intr].polarity = GIC_POL_POS;
gic_intr_map[intr].trigtype = GIC_TRIG_EDGE;
gic_intr_map[intr].ipiflag = 1;
ipi_map[cpu] |= (1 << (cpupin + 2));
}

static void __init fill_ipi_map(void)
{
int i;
int cpu;

for (i = 0; i < ARRAY_SIZE(gic_intr_map); i++) {
if (gic_intr_map[i].ipiflag && (gic_intr_map[i].cpunum != X))
ipi_map[gic_intr_map[i].cpunum] |=
(1 << (gic_intr_map[i].pin + 2));
for (cpu = 0; cpu < NR_CPUS; cpu++) {
fill_ipi_map1(gic_resched_int_base, cpu, GIC_CPU_INT1);
fill_ipi_map1(gic_call_int_base, cpu, GIC_CPU_INT2);
}
}
#endif
Expand Down Expand Up @@ -514,24 +523,10 @@ void __init arch_init_irq(void)
if (gic_present) {
/* FIXME */
int i;
struct {
unsigned int resched;
unsigned int call;
} ipiirq[] = {
{
.resched = GIC_IPI_EXT_INTR_RESCHED_VPE0,
.call = GIC_IPI_EXT_INTR_CALLFNC_VPE0},
{
.resched = GIC_IPI_EXT_INTR_RESCHED_VPE1,
.call = GIC_IPI_EXT_INTR_CALLFNC_VPE1
}, {
.resched = GIC_IPI_EXT_INTR_RESCHED_VPE2,
.call = GIC_IPI_EXT_INTR_CALLFNC_VPE2
}, {
.resched = GIC_IPI_EXT_INTR_RESCHED_VPE3,
.call = GIC_IPI_EXT_INTR_CALLFNC_VPE3
}
};

gic_call_int_base = GIC_NUM_INTRS - NR_CPUS;
gic_resched_int_base = gic_call_int_base - NR_CPUS;

fill_ipi_map();
gic_init(GIC_BASE_ADDR, GIC_ADDRSPACE_SZ, gic_intr_map, ARRAY_SIZE(gic_intr_map), MIPS_GIC_IRQ_BASE);
if (!gcmp_present) {
Expand All @@ -553,12 +548,15 @@ void __init arch_init_irq(void)
printk("CPU%d: status register now %08x\n", smp_processor_id(), read_c0_status());
write_c0_status(0x1100dc00);
printk("CPU%d: status register frc %08x\n", smp_processor_id(), read_c0_status());
for (i = 0; i < ARRAY_SIZE(ipiirq); i++) {
setup_irq(MIPS_GIC_IRQ_BASE + ipiirq[i].resched, &irq_resched);
setup_irq(MIPS_GIC_IRQ_BASE + ipiirq[i].call, &irq_call);

set_irq_handler(MIPS_GIC_IRQ_BASE + ipiirq[i].resched, handle_percpu_irq);
set_irq_handler(MIPS_GIC_IRQ_BASE + ipiirq[i].call, handle_percpu_irq);
for (i = 0; i < NR_CPUS; i++) {
setup_irq(MIPS_GIC_IRQ_BASE +
GIC_RESCHED_INT(i), &irq_resched);
setup_irq(MIPS_GIC_IRQ_BASE +
GIC_CALL_INT(i), &irq_call);
set_irq_handler(MIPS_GIC_IRQ_BASE +
GIC_RESCHED_INT(i), handle_percpu_irq);
set_irq_handler(MIPS_GIC_IRQ_BASE +
GIC_CALL_INT(i), handle_percpu_irq);
}
} else {
/* set up ipi interrupts */
Expand Down

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