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Date: Thu, 18 Sep 2014 14:47:25 -0700
From: Andrew Bresticker <abrestic@...omium.org>
To: Ralf Baechle <ralf@...ux-mips.org>,
Thomas Gleixner <tglx@...utronix.de>,
Jason Cooper <jason@...edaemon.net>
Cc: Andrew Bresticker <abrestic@...omium.org>,
Jeffrey Deans <jeffrey.deans@...tec.com>,
Markos Chandras <markos.chandras@...tec.com>,
Paul Burton <paul.burton@...tec.com>,
Qais Yousef <qais.yousef@...tec.com>,
Jonas Gorski <jogo@...nwrt.org>,
John Crispin <blogic@...nwrt.org>,
David Daney <ddaney.cavm@...il.com>, linux-mips@...ux-mips.org,
linux-kernel@...r.kernel.org
Subject: [PATCH V2 19/24] irqchip: mips-gic: Probe for number of external interrupts
Instead of requiring platforms to define the correct GIC_NUM_INTRS,
use the value reported in GIC_SH_CONFIG.
Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
Acked-by: Jason Cooper <jason@...edaemon.net>
Reviewed-by: Qais Yousef <qais.yousef@...tec.com>
Tested-by: Qais Yousef <qais.yousef@...tec.com>
---
No changes from v1.
---
arch/mips/include/asm/gic.h | 2 ++
arch/mips/include/asm/mach-malta/irq.h | 1 -
arch/mips/include/asm/mach-sead3/irq.h | 1 -
drivers/irqchip/irq-mips-gic.c | 40 +++++++++++++++++-----------------
4 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/arch/mips/include/asm/gic.h b/arch/mips/include/asm/gic.h
index cfbf907..8d1e457 100644
--- a/arch/mips/include/asm/gic.h
+++ b/arch/mips/include/asm/gic.h
@@ -18,6 +18,8 @@
#undef GICISBYTELITTLEENDIAN
+#define GIC_MAX_INTRS 256
+
/* Constants */
#define GIC_POL_POS 1
#define GIC_POL_NEG 0
diff --git a/arch/mips/include/asm/mach-malta/irq.h b/arch/mips/include/asm/mach-malta/irq.h
index f2c13d2..47cfe64 100644
--- a/arch/mips/include/asm/mach-malta/irq.h
+++ b/arch/mips/include/asm/mach-malta/irq.h
@@ -2,7 +2,6 @@
#define __ASM_MACH_MIPS_IRQ_H
-#define GIC_NUM_INTRS (24 + NR_CPUS * 2)
#define NR_IRQS 256
#include_next <irq.h>
diff --git a/arch/mips/include/asm/mach-sead3/irq.h b/arch/mips/include/asm/mach-sead3/irq.h
index d8106f7..5d154cf 100644
--- a/arch/mips/include/asm/mach-sead3/irq.h
+++ b/arch/mips/include/asm/mach-sead3/irq.h
@@ -1,7 +1,6 @@
#ifndef __ASM_MACH_MIPS_IRQ_H
#define __ASM_MACH_MIPS_IRQ_H
-#define GIC_NUM_INTRS (24 + NR_CPUS * 2)
#define NR_IRQS 256
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 6c9fcbf..1349427 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -28,15 +28,15 @@ unsigned int gic_irq_flags[GIC_NUM_INTRS];
unsigned int gic_cpu_pin;
struct gic_pcpu_mask {
- DECLARE_BITMAP(pcpu_mask, GIC_NUM_INTRS);
+ DECLARE_BITMAP(pcpu_mask, GIC_MAX_INTRS);
};
struct gic_pending_regs {
- DECLARE_BITMAP(pending, GIC_NUM_INTRS);
+ DECLARE_BITMAP(pending, GIC_MAX_INTRS);
};
struct gic_intrmask_regs {
- DECLARE_BITMAP(intrmask, GIC_NUM_INTRS);
+ DECLARE_BITMAP(intrmask, GIC_MAX_INTRS);
};
static struct gic_pcpu_mask pcpu_masks[NR_CPUS];
@@ -44,6 +44,7 @@ static struct gic_pending_regs pending_regs[NR_CPUS];
static struct gic_intrmask_regs intrmask_regs[NR_CPUS];
static DEFINE_SPINLOCK(gic_lock);
static struct irq_domain *gic_irq_domain;
+static int gic_shared_intrs;
static void __gic_irq_dispatch(void);
@@ -192,26 +193,26 @@ void gic_get_int_mask(unsigned long *dst, const unsigned long *src)
intrmask_abs = (unsigned long *) GIC_REG_ABS_ADDR(SHARED,
GIC_SH_MASK_31_0_OFS);
- for (i = 0; i < BITS_TO_LONGS(GIC_NUM_INTRS); i++) {
+ for (i = 0; i < BITS_TO_LONGS(gic_shared_intrs); i++) {
GICREAD(*pending_abs, pending[i]);
GICREAD(*intrmask_abs, intrmask[i]);
pending_abs++;
intrmask_abs++;
}
- bitmap_and(pending, pending, intrmask, GIC_NUM_INTRS);
- bitmap_and(pending, pending, pcpu_mask, GIC_NUM_INTRS);
- bitmap_and(dst, src, pending, GIC_NUM_INTRS);
+ bitmap_and(pending, pending, intrmask, gic_shared_intrs);
+ bitmap_and(pending, pending, pcpu_mask, gic_shared_intrs);
+ bitmap_and(dst, src, pending, gic_shared_intrs);
}
unsigned int gic_get_int(void)
{
- DECLARE_BITMAP(interrupts, GIC_NUM_INTRS);
+ DECLARE_BITMAP(interrupts, GIC_MAX_INTRS);
- bitmap_fill(interrupts, GIC_NUM_INTRS);
+ bitmap_fill(interrupts, gic_shared_intrs);
gic_get_int_mask(interrupts, interrupts);
- return find_first_bit(interrupts, GIC_NUM_INTRS);
+ return find_first_bit(interrupts, gic_shared_intrs);
}
static void gic_mask_irq(struct irq_data *d)
@@ -332,7 +333,7 @@ static void __gic_irq_dispatch(void)
{
unsigned int intr, virq;
- while ((intr = gic_get_int()) != GIC_NUM_INTRS) {
+ while ((intr = gic_get_int()) != gic_shared_intrs) {
virq = irq_linear_revmap(gic_irq_domain, intr);
do_IRQ(virq);
}
@@ -405,7 +406,7 @@ static __init void gic_ipi_init(void)
int i;
/* Use last 2 * NR_CPUS interrupts as IPIs */
- gic_resched_int_base = GIC_NUM_INTRS - nr_cpu_ids;
+ gic_resched_int_base = gic_shared_intrs - nr_cpu_ids;
gic_call_int_base = gic_resched_int_base - nr_cpu_ids;
for (i = 0; i < nr_cpu_ids; i++) {
@@ -419,19 +420,18 @@ static inline void gic_ipi_init(void)
}
#endif
-static void __init gic_basic_init(int numintrs, int numvpes)
+static void __init gic_basic_init(int numvpes)
{
unsigned int i;
board_bind_eic_interrupt = &gic_bind_eic_interrupt;
/* Setup defaults */
- for (i = 0; i < numintrs; i++) {
+ for (i = 0; i < gic_shared_intrs; i++) {
GIC_SET_POLARITY(i, GIC_POL_POS);
GIC_SET_TRIGGER(i, GIC_TRIG_LEVEL);
GIC_CLR_INTR_MASK(i);
- if (i < GIC_NUM_INTRS)
- gic_irq_flags[i] = 0;
+ gic_irq_flags[i] = 0;
}
vpe_local_setup(numvpes);
@@ -471,9 +471,9 @@ void __init gic_init(unsigned long gic_base_addr,
gic_addrspace_size);
GICREAD(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig);
- numintrs = (gicconfig & GIC_SH_CONFIG_NUMINTRS_MSK) >>
+ gic_shared_intrs = (gicconfig & GIC_SH_CONFIG_NUMINTRS_MSK) >>
GIC_SH_CONFIG_NUMINTRS_SHF;
- numintrs = ((numintrs + 1) * 8);
+ gic_shared_intrs = ((gic_shared_intrs + 1) * 8);
numvpes = (gicconfig & GIC_SH_CONFIG_NUMVPES_MSK) >>
GIC_SH_CONFIG_NUMVPES_SHF;
@@ -490,12 +490,12 @@ void __init gic_init(unsigned long gic_base_addr,
gic_irq_dispatch);
}
- gic_irq_domain = irq_domain_add_simple(NULL, GIC_NUM_INTRS, irqbase,
+ gic_irq_domain = irq_domain_add_simple(NULL, gic_shared_intrs, irqbase,
&gic_irq_domain_ops, NULL);
if (!gic_irq_domain)
panic("Failed to add GIC IRQ domain");
- gic_basic_init(numintrs, numvpes);
+ gic_basic_init(numvpes);
gic_ipi_init();
}
--
2.1.0.rc2.206.gedb03e5
--
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