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-rw-r--r--arch/arm/common/Kconfig6
-rw-r--r--arch/arm/common/gic.c165
-rw-r--r--arch/arm/common/pl330.c124
-rw-r--r--arch/arm/common/timer-sp.c7
-rw-r--r--arch/arm/common/vic.c148
5 files changed, 322 insertions, 128 deletions
diff --git a/arch/arm/common/Kconfig b/arch/arm/common/Kconfig
index 74df9ca2be3..81a933eb090 100644
--- a/arch/arm/common/Kconfig
+++ b/arch/arm/common/Kconfig
@@ -1,8 +1,14 @@
config ARM_GIC
select IRQ_DOMAIN
+ select MULTI_IRQ_HANDLER
+ bool
+
+config GIC_NON_BANKED
bool
config ARM_VIC
+ select IRQ_DOMAIN
+ select MULTI_IRQ_HANDLER
bool
config ARM_VIC_NR
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index 410a546060a..b2dc2dd7f1d 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -40,13 +40,36 @@
#include <linux/slab.h>
#include <asm/irq.h>
+#include <asm/exception.h>
#include <asm/mach/irq.h>
#include <asm/hardware/gic.h>
-static DEFINE_RAW_SPINLOCK(irq_controller_lock);
+union gic_base {
+ void __iomem *common_base;
+ void __percpu __iomem **percpu_base;
+};
-/* Address of GIC 0 CPU interface */
-void __iomem *gic_cpu_base_addr __read_mostly;
+struct gic_chip_data {
+ unsigned int irq_offset;
+ union gic_base dist_base;
+ union gic_base cpu_base;
+#ifdef CONFIG_CPU_PM
+ u32 saved_spi_enable[DIV_ROUND_UP(1020, 32)];
+ u32 saved_spi_conf[DIV_ROUND_UP(1020, 16)];
+ u32 saved_spi_target[DIV_ROUND_UP(1020, 4)];
+ u32 __percpu *saved_ppi_enable;
+ u32 __percpu *saved_ppi_conf;
+#endif
+#ifdef CONFIG_IRQ_DOMAIN
+ struct irq_domain domain;
+#endif
+ unsigned int gic_irqs;
+#ifdef CONFIG_GIC_NON_BANKED
+ void __iomem *(*get_base)(union gic_base *);
+#endif
+};
+
+static DEFINE_RAW_SPINLOCK(irq_controller_lock);
/*
* Supported arch specific GIC irq extension.
@@ -67,16 +90,48 @@ struct irq_chip gic_arch_extn = {
static struct gic_chip_data gic_data[MAX_GIC_NR] __read_mostly;
+#ifdef CONFIG_GIC_NON_BANKED
+static void __iomem *gic_get_percpu_base(union gic_base *base)
+{
+ return *__this_cpu_ptr(base->percpu_base);
+}
+
+static void __iomem *gic_get_common_base(union gic_base *base)
+{
+ return base->common_base;
+}
+
+static inline void __iomem *gic_data_dist_base(struct gic_chip_data *data)
+{
+ return data->get_base(&data->dist_base);
+}
+
+static inline void __iomem *gic_data_cpu_base(struct gic_chip_data *data)
+{
+ return data->get_base(&data->cpu_base);
+}
+
+static inline void gic_set_base_accessor(struct gic_chip_data *data,
+ void __iomem *(*f)(union gic_base *))
+{
+ data->get_base = f;
+}
+#else
+#define gic_data_dist_base(d) ((d)->dist_base.common_base)
+#define gic_data_cpu_base(d) ((d)->cpu_base.common_base)
+#define gic_set_base_accessor(d,f)
+#endif
+
static inline void __iomem *gic_dist_base(struct irq_data *d)
{
struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
- return gic_data->dist_base;
+ return gic_data_dist_base(gic_data);
}
static inline void __iomem *gic_cpu_base(struct irq_data *d)
{
struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
- return gic_data->cpu_base;
+ return gic_data_cpu_base(gic_data);
}
static inline unsigned int gic_irq(struct irq_data *d)
@@ -215,6 +270,32 @@ static int gic_set_wake(struct irq_data *d, unsigned int on)
#define gic_set_wake NULL
#endif
+asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
+{
+ u32 irqstat, irqnr;
+ struct gic_chip_data *gic = &gic_data[0];
+ void __iomem *cpu_base = gic_data_cpu_base(gic);
+
+ do {
+ irqstat = readl_relaxed(cpu_base + GIC_CPU_INTACK);
+ irqnr = irqstat & ~0x1c00;
+
+ if (likely(irqnr > 15 && irqnr < 1021)) {
+ irqnr = irq_domain_to_irq(&gic->domain, irqnr);
+ handle_IRQ(irqnr, regs);
+ continue;
+ }
+ if (irqnr < 16) {
+ writel_relaxed(irqstat, cpu_base + GIC_CPU_EOI);
+#ifdef CONFIG_SMP
+ handle_IPI(irqnr, regs);
+#endif
+ continue;
+ }
+ break;
+ } while (1);
+}
+
static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
{
struct gic_chip_data *chip_data = irq_get_handler_data(irq);
@@ -225,7 +306,7 @@ static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
chained_irq_enter(chip, desc);
raw_spin_lock(&irq_controller_lock);
- status = readl_relaxed(chip_data->cpu_base + GIC_CPU_INTACK);
+ status = readl_relaxed(gic_data_cpu_base(chip_data) + GIC_CPU_INTACK);
raw_spin_unlock(&irq_controller_lock);
gic_irq = (status & 0x3ff);
@@ -270,7 +351,7 @@ static void __init gic_dist_init(struct gic_chip_data *gic)
u32 cpumask;
unsigned int gic_irqs = gic->gic_irqs;
struct irq_domain *domain = &gic->domain;
- void __iomem *base = gic->dist_base;
+ void __iomem *base = gic_data_dist_base(gic);
u32 cpu = 0;
#ifdef CONFIG_SMP
@@ -330,8 +411,8 @@ static void __init gic_dist_init(struct gic_chip_data *gic)
static void __cpuinit gic_cpu_init(struct gic_chip_data *gic)
{
- void __iomem *dist_base = gic->dist_base;
- void __iomem *base = gic->cpu_base;
+ void __iomem *dist_base = gic_data_dist_base(gic);
+ void __iomem *base = gic_data_cpu_base(gic);
int i;
/*
@@ -368,7 +449,7 @@ static void gic_dist_save(unsigned int gic_nr)
BUG();
gic_irqs = gic_data[gic_nr].gic_irqs;
- dist_base = gic_data[gic_nr].dist_base;
+ dist_base = gic_data_dist_base(&gic_data[gic_nr]);
if (!dist_base)
return;
@@ -403,7 +484,7 @@ static void gic_dist_restore(unsigned int gic_nr)
BUG();
gic_irqs = gic_data[gic_nr].gic_irqs;
- dist_base = gic_data[gic_nr].dist_base;
+ dist_base = gic_data_dist_base(&gic_data[gic_nr]);
if (!dist_base)
return;
@@ -439,8 +520,8 @@ static void gic_cpu_save(unsigned int gic_nr)
if (gic_nr >= MAX_GIC_NR)
BUG();
- dist_base = gic_data[gic_nr].dist_base;
- cpu_base = gic_data[gic_nr].cpu_base;
+ dist_base = gic_data_dist_base(&gic_data[gic_nr]);
+ cpu_base = gic_data_cpu_base(&gic_data[gic_nr]);
if (!dist_base || !cpu_base)
return;
@@ -465,8 +546,8 @@ static void gic_cpu_restore(unsigned int gic_nr)
if (gic_nr >= MAX_GIC_NR)
BUG();
- dist_base = gic_data[gic_nr].dist_base;
- cpu_base = gic_data[gic_nr].cpu_base;
+ dist_base = gic_data_dist_base(&gic_data[gic_nr]);
+ cpu_base = gic_data_cpu_base(&gic_data[gic_nr]);
if (!dist_base || !cpu_base)
return;
@@ -491,6 +572,11 @@ static int gic_notifier(struct notifier_block *self, unsigned long cmd, void *v)
int i;
for (i = 0; i < MAX_GIC_NR; i++) {
+#ifdef CONFIG_GIC_NON_BANKED
+ /* Skip over unused GICs */
+ if (!gic_data[i].get_base)
+ continue;
+#endif
switch (cmd) {
case CPU_PM_ENTER:
gic_cpu_save(i);
@@ -564,8 +650,9 @@ const struct irq_domain_ops gic_irq_domain_ops = {
#endif
};
-void __init gic_init(unsigned int gic_nr, int irq_start,
- void __iomem *dist_base, void __iomem *cpu_base)
+void __init gic_init_bases(unsigned int gic_nr, int irq_start,
+ void __iomem *dist_base, void __iomem *cpu_base,
+ u32 percpu_offset)
{
struct gic_chip_data *gic;
struct irq_domain *domain;
@@ -575,8 +662,36 @@ void __init gic_init(unsigned int gic_nr, int irq_start,
gic = &gic_data[gic_nr];
domain = &gic->domain;
- gic->dist_base = dist_base;
- gic->cpu_base = cpu_base;
+#ifdef CONFIG_GIC_NON_BANKED
+ if (percpu_offset) { /* Frankein-GIC without banked registers... */
+ unsigned int cpu;
+
+ gic->dist_base.percpu_base = alloc_percpu(void __iomem *);
+ gic->cpu_base.percpu_base = alloc_percpu(void __iomem *);
+ if (WARN_ON(!gic->dist_base.percpu_base ||
+ !gic->cpu_base.percpu_base)) {
+ free_percpu(gic->dist_base.percpu_base);
+ free_percpu(gic->cpu_base.percpu_base);
+ return;
+ }
+
+ for_each_possible_cpu(cpu) {
+ unsigned long offset = percpu_offset * cpu_logical_map(cpu);
+ *per_cpu_ptr(gic->dist_base.percpu_base, cpu) = dist_base + offset;
+ *per_cpu_ptr(gic->cpu_base.percpu_base, cpu) = cpu_base + offset;
+ }
+
+ gic_set_base_accessor(gic, gic_get_percpu_base);
+ } else
+#endif
+ { /* Normal, sane GIC... */
+ WARN(percpu_offset,
+ "GIC_NON_BANKED not enabled, ignoring %08x offset!",
+ percpu_offset);
+ gic->dist_base.common_base = dist_base;
+ gic->cpu_base.common_base = cpu_base;
+ gic_set_base_accessor(gic, gic_get_common_base);
+ }
/*
* For primary GICs, skip over SGIs.
@@ -584,8 +699,6 @@ void __init gic_init(unsigned int gic_nr, int irq_start,
*/
domain->hwirq_base = 32;
if (gic_nr == 0) {
- gic_cpu_base_addr = cpu_base;
-
if ((irq_start & 31) > 0) {
domain->hwirq_base = 16;
if (irq_start != -1)
@@ -597,7 +710,7 @@ void __init gic_init(unsigned int gic_nr, int irq_start,
* Find out how many interrupts are supported.
* The GIC only supports up to 1020 interrupt sources.
*/
- gic_irqs = readl_relaxed(dist_base + GIC_DIST_CTR) & 0x1f;
+ gic_irqs = readl_relaxed(gic_data_dist_base(gic) + GIC_DIST_CTR) & 0x1f;
gic_irqs = (gic_irqs + 1) * 32;
if (gic_irqs > 1020)
gic_irqs = 1020;
@@ -645,7 +758,7 @@ void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
dsb();
/* this always happens on GIC0 */
- writel_relaxed(map << 16 | irq, gic_data[0].dist_base + GIC_DIST_SOFTINT);
+ writel_relaxed(map << 16 | irq, gic_data_dist_base(&gic_data[0]) + GIC_DIST_SOFTINT);
}
#endif
@@ -656,6 +769,7 @@ int __init gic_of_init(struct device_node *node, struct device_node *parent)
{
void __iomem *cpu_base;
void __iomem *dist_base;
+ u32 percpu_offset;
int irq;
struct irq_domain *domain = &gic_data[gic_cnt].domain;
@@ -668,9 +782,12 @@ int __init gic_of_init(struct device_node *node, struct device_node *parent)
cpu_base = of_iomap(node, 1);
WARN(!cpu_base, "unable to map gic cpu registers\n");
+ if (of_property_read_u32(node, "cpu-offset", &percpu_offset))
+ percpu_offset = 0;
+
domain->of_node = of_node_get(node);
- gic_init(gic_cnt, -1, dist_base, cpu_base);
+ gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset);
if (parent) {
irq = irq_of_parse_and_map(node, 0);
diff --git a/arch/arm/common/pl330.c b/arch/arm/common/pl330.c
index f407a6b35d3..d8e44a43047 100644
--- a/arch/arm/common/pl330.c
+++ b/arch/arm/common/pl330.c
@@ -221,17 +221,6 @@
*/
#define MCODE_BUFF_PER_REQ 256
-/*
- * Mark a _pl330_req as free.
- * We do it by writing DMAEND as the first instruction
- * because no valid request is going to have DMAEND as
- * its first instruction to execute.
- */
-#define MARK_FREE(req) do { \
- _emit_END(0, (req)->mc_cpu); \
- (req)->mc_len = 0; \
- } while (0)
-
/* If the _pl330_req is available to the client */
#define IS_FREE(req) (*((u8 *)((req)->mc_cpu)) == CMD_DMAEND)
@@ -301,8 +290,10 @@ struct pl330_thread {
struct pl330_dmac *dmac;
/* Only two at a time */
struct _pl330_req req[2];
- /* Index of the last submitted request */
+ /* Index of the last enqueued request */
unsigned lstenq;
+ /* Index of the last submitted request or -1 if the DMA is stopped */
+ int req_running;
};
enum pl330_dmac_state {
@@ -778,6 +769,22 @@ static inline void _execute_DBGINSN(struct pl330_thread *thrd,
writel(0, regs + DBGCMD);
}
+/*
+ * Mark a _pl330_req as free.
+ * We do it by writing DMAEND as the first instruction
+ * because no valid request is going to have DMAEND as
+ * its first instruction to execute.
+ */
+static void mark_free(struct pl330_thread *thrd, int idx)
+{
+ struct _pl330_req *req = &thrd->req[idx];
+
+ _emit_END(0, req->mc_cpu);
+ req->mc_len = 0;
+
+ thrd->req_running = -1;
+}
+
static inline u32 _state(struct pl330_thread *thrd)
{
void __iomem *regs = thrd->dmac->pinfo->base;
@@ -836,31 +843,6 @@ static inline u32 _state(struct pl330_thread *thrd)
}
}
-/* If the request 'req' of thread 'thrd' is currently active */
-static inline bool _req_active(struct pl330_thread *thrd,
- struct _pl330_req *req)
-{
- void __iomem *regs = thrd->dmac->pinfo->base;
- u32 buf = req->mc_bus, pc = readl(regs + CPC(thrd->id));
-
- if (IS_FREE(req))
- return false;
-
- return (pc >= buf && pc <= buf + req->mc_len) ? true : false;
-}
-
-/* Returns 0 if the thread is inactive, ID of active req + 1 otherwise */
-static inline unsigned _thrd_active(struct pl330_thread *thrd)
-{
- if (_req_active(thrd, &thrd->req[0]))
- return 1; /* First req active */
-
- if (_req_active(thrd, &thrd->req[1]))
- return 2; /* Second req active */
-
- return 0;
-}
-
static void _stop(struct pl330_thread *thrd)
{
void __iomem *regs = thrd->dmac->pinfo->base;
@@ -892,17 +874,22 @@ static bool _trigger(struct pl330_thread *thrd)
struct _arg_GO go;
unsigned ns;
u8 insn[6] = {0, 0, 0, 0, 0, 0};
+ int idx;
/* Return if already ACTIVE */
if (_state(thrd) != PL330_STATE_STOPPED)
return true;
- if (!IS_FREE(&thrd->req[1 - thrd->lstenq]))
- req = &thrd->req[1 - thrd->lstenq];
- else if (!IS_FREE(&thrd->req[thrd->lstenq]))
- req = &thrd->req[thrd->lstenq];
- else
- req = NULL;
+ idx = 1 - thrd->lstenq;
+ if (!IS_FREE(&thrd->req[idx]))
+ req = &thrd->req[idx];
+ else {
+ idx = thrd->lstenq;
+ if (!IS_FREE(&thrd->req[idx]))
+ req = &thrd->req[idx];
+ else
+ req = NULL;
+ }
/* Return if no request */
if (!req || !req->r)
@@ -933,6 +920,8 @@ static bool _trigger(struct pl330_thread *thrd)
/* Only manager can execute GO */
_execute_DBGINSN(thrd, insn, true);
+ thrd->req_running = idx;
+
return true;
}
@@ -1382,8 +1371,8 @@ static void pl330_dotask(unsigned long data)
thrd->req[0].r = NULL;
thrd->req[1].r = NULL;
- MARK_FREE(&thrd->req[0]);
- MARK_FREE(&thrd->req[1]);
+ mark_free(thrd, 0);
+ mark_free(thrd, 1);
/* Clear the reset flag */
pl330->dmac_tbd.reset_chan &= ~(1 << i);
@@ -1461,14 +1450,12 @@ int pl330_update(const struct pl330_info *pi)
thrd = &pl330->channels[id];
- active = _thrd_active(thrd);
- if (!active) /* Aborted */
+ active = thrd->req_running;
+ if (active == -1) /* Aborted */
continue;
- active -= 1;
-
rqdone = &thrd->req[active];
- MARK_FREE(rqdone);
+ mark_free(thrd, active);
/* Get going again ASAP */
_start(thrd);
@@ -1480,13 +1467,19 @@ int pl330_update(const struct pl330_info *pi)
/* Now that we are in no hurry, do the callbacks */
while (!list_empty(&pl330->req_done)) {
+ struct pl330_req *r;
+
rqdone = container_of(pl330->req_done.next,
struct _pl330_req, rqd);
list_del_init(&rqdone->rqd);
+ /* Detach the req */
+ r = rqdone->r;
+ rqdone->r = NULL;
+
spin_unlock_irqrestore(&pl330->lock, flags);
- _callback(rqdone->r, PL330_ERR_NONE);
+ _callback(r, PL330_ERR_NONE);
spin_lock_irqsave(&pl330->lock, flags);
}
@@ -1509,7 +1502,7 @@ int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op)
struct pl330_thread *thrd = ch_id;
struct pl330_dmac *pl330;
unsigned long flags;
- int ret = 0, active;
+ int ret = 0, active = thrd->req_running;
if (!thrd || thrd->free || thrd->dmac->state == DYING)
return -EINVAL;
@@ -1525,28 +1518,24 @@ int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op)
thrd->req[0].r = NULL;
thrd->req[1].r = NULL;
- MARK_FREE(&thrd->req[0]);
- MARK_FREE(&thrd->req[1]);
+ mark_free(thrd, 0);
+ mark_free(thrd, 1);
break;
case PL330_OP_ABORT:
- active = _thrd_active(thrd);
-
/* Make sure the channel is stopped */
_stop(thrd);
/* ABORT is only for the active req */
- if (!active)
+ if (active == -1)
break;
- active--;
-
thrd->req[active].r = NULL;
- MARK_FREE(&thrd->req[active]);
+ mark_free(thrd, active);
/* Start the next */
case PL330_OP_START:
- if (!_thrd_active(thrd) && !_start(thrd))
+ if ((active == -1) && !_start(thrd))
ret = -EIO;
break;
@@ -1587,14 +1576,13 @@ int pl330_chan_status(void *ch_id, struct pl330_chanstatus *pstatus)
else
pstatus->faulting = false;
- active = _thrd_active(thrd);
+ active = thrd->req_running;
- if (!active) {
+ if (active == -1) {
/* Indicate that the thread is not running */
pstatus->top_req = NULL;
pstatus->wait_req = NULL;
} else {
- active--;
pstatus->top_req = thrd->req[active].r;
pstatus->wait_req = !IS_FREE(&thrd->req[1 - active])
? thrd->req[1 - active].r : NULL;
@@ -1659,9 +1647,9 @@ void *pl330_request_channel(const struct pl330_info *pi)
thrd->free = false;
thrd->lstenq = 1;
thrd->req[0].r = NULL;
- MARK_FREE(&thrd->req[0]);
+ mark_free(thrd, 0);
thrd->req[1].r = NULL;
- MARK_FREE(&thrd->req[1]);
+ mark_free(thrd, 1);
break;
}
}
@@ -1767,14 +1755,14 @@ static inline void _reset_thread(struct pl330_thread *thrd)
thrd->req[0].mc_bus = pl330->mcode_bus
+ (thrd->id * pi->mcbufsz);
thrd->req[0].r = NULL;
- MARK_FREE(&thrd->req[0]);
+ mark_free(thrd, 0);
thrd->req[1].mc_cpu = thrd->req[0].mc_cpu
+ pi->mcbufsz / 2;
thrd->req[1].mc_bus = thrd->req[0].mc_bus
+ pi->mcbufsz / 2;
thrd->req[1].r = NULL;
- MARK_FREE(&thrd->req[1]);
+ mark_free(thrd, 1);
}
static int dmac_alloc_threads(struct pl330_dmac *pl330)
diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
index 2393b5bc96f..8794a34eae6 100644
--- a/arch/arm/common/timer-sp.c
+++ b/arch/arm/common/timer-sp.c
@@ -143,7 +143,6 @@ static int sp804_set_next_event(unsigned long next,
}
static struct clock_event_device sp804_clockevent = {
- .shift = 32,
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
.set_mode = sp804_set_mode,
.set_next_event = sp804_set_next_event,
@@ -169,13 +168,9 @@ void __init sp804_clockevents_init(void __iomem *base, unsigned int irq,
clkevt_base = base;
clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ);
-
evt->name = name;
evt->irq = irq;
- evt->mult = div_sc(rate, NSEC_PER_SEC, evt->shift);
- evt->max_delta_ns = clockevent_delta2ns(0xffffffff, evt);
- evt->min_delta_ns = clockevent_delta2ns(0xf, evt);
setup_irq(irq, &sp804_timer_irq);
- clockevents_register_device(evt);
+ clockevents_config_and_register(evt, rate, 0xf, 0xffffffff);
}
diff --git a/arch/arm/common/vic.c b/arch/arm/common/vic.c
index 01f18a421b1..dcb004a804c 100644
--- a/arch/arm/common/vic.c
+++ b/arch/arm/common/vic.c
@@ -19,17 +19,22 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <linux/export.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/io.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
#include <linux/syscore_ops.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
+#include <asm/exception.h>
#include <asm/mach/irq.h>
#include <asm/hardware/vic.h>
-#ifdef CONFIG_PM
/**
* struct vic_device - VIC PM device
* @irq: The IRQ number for the base of the VIC.
@@ -40,6 +45,7 @@
* @int_enable: Save for VIC_INT_ENABLE.
* @soft_int: Save for VIC_INT_SOFT.
* @protect: Save for VIC_PROTECT.
+ * @domain: The IRQ domain for the VIC.
*/
struct vic_device {
void __iomem *base;
@@ -50,13 +56,13 @@ struct vic_device {
u32 int_enable;
u32 soft_int;
u32 protect;
+ struct irq_domain domain;
};
/* we cannot allocate memory when VICs are initially registered */
static struct vic_device vic_devices[CONFIG_ARM_VIC_NR];
static int vic_id;
-#endif /* CONFIG_PM */
/**
* vic_init2 - common initialisation code
@@ -156,39 +162,50 @@ static int __init vic_pm_init(void)
return 0;
}
late_initcall(vic_pm_init);
+#endif /* CONFIG_PM */
/**
- * vic_pm_register - Register a VIC for later power management control
+ * vic_register() - Register a VIC.
* @base: The base address of the VIC.
* @irq: The base IRQ for the VIC.
* @resume_sources: bitmask of interrupts allowed for resume sources.
+ * @node: The device tree node associated with the VIC.
*
* Register the VIC with the system device tree so that it can be notified
* of suspend and resume requests and ensure that the correct actions are
* taken to re-instate the settings on resume.
+ *
+ * This also configures the IRQ domain for the VIC.
*/
-static void __init vic_pm_register(void __iomem *base, unsigned int irq, u32 resume_sources)
+static void __init vic_register(void __iomem *base, unsigned int irq,
+ u32 resume_sources, struct device_node *node)
{
struct vic_device *v;
- if (vic_id >= ARRAY_SIZE(vic_devices))
+ if (vic_id >= ARRAY_SIZE(vic_devices)) {
printk(KERN_ERR "%s: too few VICs, increase CONFIG_ARM_VIC_NR\n", __func__);
- else {
- v = &vic_devices[vic_id];
- v->base = base;
- v->resume_sources = resume_sources;
- v->irq = irq;
- vic_id++;
+ return;
}
+
+ v = &vic_devices[vic_id];
+ v->base = base;
+ v->resume_sources = resume_sources;
+ v->irq = irq;
+ vic_id++;
+
+ v->domain.irq_base = irq;
+ v->domain.nr_irq = 32;
+#ifdef CONFIG_OF_IRQ
+ v->domain.of_node = of_node_get(node);
+#endif /* CONFIG_OF */
+ v->domain.ops = &irq_domain_simple_ops;
+ irq_domain_add(&v->domain);
}
-#else
-static inline void vic_pm_register(void __iomem *base, unsigned int irq, u32 arg1) { }
-#endif /* CONFIG_PM */
static void vic_ack_irq(struct irq_data *d)
{
void __iomem *base = irq_data_get_irq_chip_data(d);
- unsigned int irq = d->irq & 31;
+ unsigned int irq = d->hwirq;
writel(1 << irq, base + VIC_INT_ENABLE_CLEAR);
/* moreover, clear the soft-triggered, in case it was the reason */
writel(1 << irq, base + VIC_INT_SOFT_CLEAR);
@@ -197,14 +214,14 @@ static void vic_ack_irq(struct irq_data *d)
static void vic_mask_irq(struct irq_data *d)
{
void __iomem *base = irq_data_get_irq_chip_data(d);
- unsigned int irq = d->irq & 31;
+ unsigned int irq = d->hwirq;
writel(1 << irq, base + VIC_INT_ENABLE_CLEAR);
}
static void vic_unmask_irq(struct irq_data *d)
{
void __iomem *base = irq_data_get_irq_chip_data(d);
- unsigned int irq = d->irq & 31;
+ unsigned int irq = d->hwirq;
writel(1 << irq, base + VIC_INT_ENABLE);
}
@@ -226,7 +243,7 @@ static struct vic_device *vic_from_irq(unsigned int irq)
static int vic_set_wake(struct irq_data *d, unsigned int on)
{
struct vic_device *v = vic_from_irq(d->irq);
- unsigned int off = d->irq & 31;
+ unsigned int off = d->hwirq;
u32 bit = 1 << off;
if (!v)
@@ -301,7 +318,7 @@ static void __init vic_set_irq_sources(void __iomem *base,
* and 020 within the page. We call this "second block".
*/
static void __init vic_init_st(void __iomem *base, unsigned int irq_start,
- u32 vic_sources)
+ u32 vic_sources, struct device_node *node)
{
unsigned int i;
int vic_2nd_block = ((unsigned long)base & ~PAGE_MASK) != 0;
@@ -328,17 +345,12 @@ static void __init vic_init_st(void __iomem *base, unsigned int irq_start,
}
vic_set_irq_sources(base, irq_start, vic_sources);
+ vic_register(base, irq_start, 0, node);
}
-/**
- * vic_init - initialise a vectored interrupt controller
- * @base: iomem base address
- * @irq_start: starting interrupt number, must be muliple of 32
- * @vic_sources: bitmask of interrupt sources to allow
- * @resume_sources: bitmask of interrupt sources to allow for resume
- */
-void __init vic_init(void __iomem *base, unsigned int irq_start,
- u32 vic_sources, u32 resume_sources)
+static void __init __vic_init(void __iomem *base, unsigned int irq_start,
+ u32 vic_sources, u32 resume_sources,
+ struct device_node *node)
{
unsigned int i;
u32 cellid = 0;
@@ -356,7 +368,7 @@ void __init vic_init(void __iomem *base, unsigned int irq_start,
switch(vendor) {
case AMBA_VENDOR_ST:
- vic_init_st(base, irq_start, vic_sources);
+ vic_init_st(base, irq_start, vic_sources, node);
return;
default:
printk(KERN_WARNING "VIC: unknown vendor, continuing anyways\n");
@@ -375,5 +387,81 @@ void __init vic_init(void __iomem *base, unsigned int irq_start,
vic_set_irq_sources(base, irq_start, vic_sources);
- vic_pm_register(base, irq_start, resume_sources);
+ vic_register(base, irq_start, resume_sources, node);
+}
+
+/**
+ * vic_init() - initialise a vectored interrupt controller
+ * @base: iomem base address
+ * @irq_start: starting interrupt number, must be muliple of 32
+ * @vic_sources: bitmask of interrupt sources to allow
+ * @resume_sources: bitmask of interrupt sources to allow for resume
+ */
+void __init vic_init(void __iomem *base, unsigned int irq_start,
+ u32 vic_sources, u32 resume_sources)
+{
+ __vic_init(base, irq_start, vic_sources, resume_sources, NULL);
+}
+
+#ifdef CONFIG_OF
+int __init vic_of_init(struct device_node *node, struct device_node *parent)
+{
+ void __iomem *regs;
+ int irq_base;
+
+ if (WARN(parent, "non-root VICs are not supported"))
+ return -EINVAL;
+
+ regs = of_iomap(node, 0);
+ if (WARN_ON(!regs))
+ return -EIO;
+
+ irq_base = irq_alloc_descs(-1, 0, 32, numa_node_id());
+ if (WARN_ON(irq_base < 0))
+ goto out_unmap;
+
+ __vic_init(regs, irq_base, ~0, ~0, node);
+
+ return 0;
+
+ out_unmap:
+ iounmap(regs);
+
+ return -EIO;
+}
+#endif /* CONFIG OF */
+
+/*
+ * Handle each interrupt in a single VIC. Returns non-zero if we've
+ * handled at least one interrupt. This does a single read of the
+ * status register and handles all interrupts in order from LSB first.
+ */
+static int handle_one_vic(struct vic_device *vic, struct pt_regs *regs)
+{
+ u32 stat, irq;
+ int handled = 0;
+
+ stat = readl_relaxed(vic->base + VIC_IRQ_STATUS);
+ while (stat) {
+ irq = ffs(stat) - 1;
+ handle_IRQ(irq_domain_to_irq(&vic->domain, irq), regs);
+ stat &= ~(1 << irq);
+ handled = 1;
+ }
+
+ return handled;
+}
+
+/*
+ * Keep iterating over all registered VIC's until there are no pending
+ * interrupts.
+ */
+asmlinkage void __exception_irq_entry vic_handle_irq(struct pt_regs *regs)
+{
+ int i, handled;
+
+ do {
+ for (i = 0, handled = 0; i < vic_id; ++i)
+ handled |= handle_one_vic(&vic_devices[i], regs);
+ } while (handled);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-23 03:26:52 +0000