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authorMagnus Damm <damm@igel.co.jp>2007-09-21 18:16:42 +0900
committerPaul Mundt <lethal@linux-sh.org>2007-09-21 18:16:42 +0900
commitf18d533e3cd476aedf41fe1e6e9dc3e0a2446bba (patch)
tree64e54cb0572f62f8d171ce7f779b50226bfe931f /arch/sh/kernel/cpu
parent9964fa8bf952c5c4df9676223fab4cd886d18200 (diff)
sh: intc - initial SMP support.
This implements initial support for the SMP INTC (particularly INTC2) controllers. These are largely implemented as conventional blocks, with register sets grouped together at fixed strides relative to the CPU id. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu')
-rw-r--r--arch/sh/kernel/cpu/irq/intc.c78
1 files changed, 57 insertions, 21 deletions
diff --git a/arch/sh/kernel/cpu/irq/intc.c b/arch/sh/kernel/cpu/irq/intc.c
index 481871fee1a..6ac018c15e0 100644
--- a/arch/sh/kernel/cpu/irq/intc.c
+++ b/arch/sh/kernel/cpu/irq/intc.c
@@ -40,6 +40,9 @@ struct intc_handle_int {
struct intc_desc_int {
unsigned long *reg;
+#ifdef CONFIG_SMP
+ unsigned long *smp;
+#endif
unsigned int nr_reg;
struct intc_handle_int *prio;
unsigned int nr_prio;
@@ -48,6 +51,16 @@ struct intc_desc_int {
struct irq_chip chip;
};
+#ifdef CONFIG_SMP
+#define IS_SMP(x) x.smp
+#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
+#define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
+#else
+#define IS_SMP(x) 0
+#define INTC_REG(d, x, c) (d->reg[(x)])
+#define SMP_NR(d, x) 1
+#endif
+
static unsigned int intc_prio_level[NR_IRQS]; /* for now */
static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
@@ -177,11 +190,14 @@ static void (*intc_disable_fns[])(unsigned long addr,
static inline void _intc_enable(unsigned int irq, unsigned long handle)
{
struct intc_desc_int *d = get_intc_desc(irq);
- unsigned long addr = d->reg[_INTC_ADDR_E(handle)];
+ unsigned long addr;
+ unsigned int cpu;
- intc_enable_fns[_INTC_MODE(handle)](addr, handle,
- intc_reg_fns[_INTC_FN(handle)],
- irq);
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
+ addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
+ intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\
+ [_INTC_FN(handle)], irq);
+ }
}
static void intc_enable(unsigned int irq)
@@ -191,13 +207,16 @@ static void intc_enable(unsigned int irq)
static void intc_disable(unsigned int irq)
{
- struct intc_desc_int *desc = get_intc_desc(irq);
+ struct intc_desc_int *d = get_intc_desc(irq);
unsigned long handle = (unsigned long) get_irq_chip_data(irq);
- unsigned long addr = desc->reg[_INTC_ADDR_D(handle)];
+ unsigned long addr;
+ unsigned int cpu;
- intc_disable_fns[_INTC_MODE(handle)](addr, handle,
- intc_reg_fns[_INTC_FN(handle)],
- irq);
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
+ intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\
+ [_INTC_FN(handle)], irq);
+ }
}
static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
@@ -276,7 +295,7 @@ static int intc_set_sense(unsigned int irq, unsigned int type)
ihp = intc_find_irq(d->sense, d->nr_sense, irq);
if (ihp) {
- addr = d->reg[_INTC_ADDR_E(ihp->handle)];
+ addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0);
intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value);
}
return 0;
@@ -536,9 +555,26 @@ static void __init intc_register_irq(struct intc_desc *desc,
d->chip.mask(irq);
}
+static unsigned int __init save_reg(struct intc_desc_int *d,
+ unsigned int cnt,
+ unsigned long value,
+ unsigned int smp)
+{
+ if (value) {
+ d->reg[cnt] = value;
+#ifdef CONFIG_SMP
+ d->smp[cnt] = smp;
+#endif
+ return 1;
+ }
+
+ return 0;
+}
+
+
void __init register_intc_controller(struct intc_desc *desc)
{
- unsigned int i, k;
+ unsigned int i, k, smp;
struct intc_desc_int *d;
d = alloc_bootmem(sizeof(*d));
@@ -548,14 +584,16 @@ void __init register_intc_controller(struct intc_desc *desc)
d->nr_reg += desc->sense_regs ? desc->nr_sense_regs : 0;
d->reg = alloc_bootmem(d->nr_reg * sizeof(*d->reg));
+#ifdef CONFIG_SMP
+ d->smp = alloc_bootmem(d->nr_reg * sizeof(*d->smp));
+#endif
k = 0;
if (desc->mask_regs) {
for (i = 0; i < desc->nr_mask_regs; i++) {
- if (desc->mask_regs[i].set_reg)
- d->reg[k++] = desc->mask_regs[i].set_reg;
- if (desc->mask_regs[i].clr_reg)
- d->reg[k++] = desc->mask_regs[i].clr_reg;
+ smp = IS_SMP(desc->mask_regs[i]);
+ k += save_reg(d, k, desc->mask_regs[i].set_reg, smp);
+ k += save_reg(d, k, desc->mask_regs[i].clr_reg, smp);
}
}
@@ -563,10 +601,9 @@ void __init register_intc_controller(struct intc_desc *desc)
d->prio = alloc_bootmem(desc->nr_vectors * sizeof(*d->prio));
for (i = 0; i < desc->nr_prio_regs; i++) {
- if (desc->prio_regs[i].set_reg)
- d->reg[k++] = desc->prio_regs[i].set_reg;
- if (desc->prio_regs[i].clr_reg)
- d->reg[k++] = desc->prio_regs[i].clr_reg;
+ smp = IS_SMP(desc->prio_regs[i]);
+ k += save_reg(d, k, desc->prio_regs[i].set_reg, smp);
+ k += save_reg(d, k, desc->prio_regs[i].clr_reg, smp);
}
}
@@ -574,8 +611,7 @@ void __init register_intc_controller(struct intc_desc *desc)
d->sense = alloc_bootmem(desc->nr_vectors * sizeof(*d->sense));
for (i = 0; i < desc->nr_sense_regs; i++) {
- if (desc->sense_regs[i].reg)
- d->reg[k++] = desc->sense_regs[i].reg;
+ k += save_reg(d, k, desc->sense_regs[i].reg, 0);
}
}