#include <asm/leon_amba.h>
#include <asm/traps.h>
#include <asm/cacheflush.h>
+#include <asm/smp.h>
#include "prom.h"
#include "irq.h"
struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */
-struct amba_apb_device leon_percpu_timer_dev[16];
int leondebug_irq_disable;
int leon_debug_irqout;
static int dummy_master_l10_counter;
unsigned long amba_system_id;
+static DEFINE_SPINLOCK(leon_irq_lock);
unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
+int leon3_ticker_irq; /* Timer ticker IRQ */
unsigned int sparc_leon_eirq;
-#define LEON_IMASK ((&leon3_irqctrl_regs->mask[0]))
+#define LEON_IMASK (&leon3_irqctrl_regs->mask[0])
+#define LEON_IACK (&leon3_irqctrl_regs->iclear)
+#define LEON_DO_ACK_HW 1
-/* Return the IRQ of the pending IRQ on the extended IRQ controller */
-int sparc_leon_eirq_get(int eirq, int cpu)
+/* Return the last ACKed IRQ by the Extended IRQ controller. It has already
+ * been (automatically) ACKed when the CPU takes the trap.
+ */
+static inline unsigned int leon_eirq_get(int cpu)
{
return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
}
-irqreturn_t sparc_leon_eirq_isr(int dummy, void *dev_id)
+/* Handle one or multiple IRQs from the extended interrupt controller */
+static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc)
{
- printk(KERN_ERR "sparc_leon_eirq_isr: ERROR EXTENDED IRQ\n");
- return IRQ_HANDLED;
+ unsigned int eirq;
+ int cpu = hard_smp_processor_id();
+
+ eirq = leon_eirq_get(cpu);
+ if ((eirq & 0x10) && irq_map[eirq]->irq) /* bit4 tells if IRQ happened */
+ generic_handle_irq(irq_map[eirq]->irq);
}
/* The extended IRQ controller has been found, this function registers it */
-void sparc_leon_eirq_register(int eirq)
+void leon_eirq_setup(unsigned int eirq)
{
- int irq;
-
- /* Register a "BAD" handler for this interrupt, it should never happen */
- irq = request_irq(eirq, sparc_leon_eirq_isr,
- (IRQF_DISABLED | SA_STATIC_ALLOC), "extirq", NULL);
+ unsigned long mask, oldmask;
+ unsigned int veirq;
- if (irq) {
- printk(KERN_ERR
- "sparc_leon_eirq_register: unable to attach IRQ%d\n",
- eirq);
- } else {
- sparc_leon_eirq = eirq;
+ if (eirq < 1 || eirq > 0xf) {
+ printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
+ return;
}
+ veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);
+
+ /*
+ * Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
+ * controller have a mask-bit of their own, so this is safe.
+ */
+ irq_link(veirq);
+ mask = 1 << eirq;
+ oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK);
+ LEON3_BYPASS_STORE_PA(LEON_IMASK, (oldmask | mask));
+ sparc_leon_eirq = eirq;
}
static inline unsigned long get_irqmask(unsigned int irq)
return mask;
}
-static void leon_enable_irq(unsigned int irq_nr)
+static void leon_unmask_irq(struct irq_data *data)
{
unsigned long mask, flags;
- mask = get_irqmask(irq_nr);
- local_irq_save(flags);
+
+ mask = (unsigned long)data->chip_data;
+ spin_lock_irqsave(&leon_irq_lock, flags);
LEON3_BYPASS_STORE_PA(LEON_IMASK,
(LEON3_BYPASS_LOAD_PA(LEON_IMASK) | (mask)));
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&leon_irq_lock, flags);
}
-static void leon_disable_irq(unsigned int irq_nr)
+static void leon_mask_irq(struct irq_data *data)
{
unsigned long mask, flags;
- mask = get_irqmask(irq_nr);
- local_irq_save(flags);
+
+ mask = (unsigned long)data->chip_data;
+ spin_lock_irqsave(&leon_irq_lock, flags);
LEON3_BYPASS_STORE_PA(LEON_IMASK,
(LEON3_BYPASS_LOAD_PA(LEON_IMASK) & ~(mask)));
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&leon_irq_lock, flags);
+}
+static unsigned int leon_startup_irq(struct irq_data *data)
+{
+ irq_link(data->irq);
+ leon_unmask_irq(data);
+ return 0;
+}
+
+static void leon_shutdown_irq(struct irq_data *data)
+{
+ leon_mask_irq(data);
+ irq_unlink(data->irq);
+}
+
+/* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
+static void leon_eoi_irq(struct irq_data *data)
+{
+ unsigned long mask = (unsigned long)data->chip_data;
+
+ if (mask & LEON_DO_ACK_HW)
+ LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
+}
+
+static struct irq_chip leon_irq = {
+ .name = "leon",
+ .irq_startup = leon_startup_irq,
+ .irq_shutdown = leon_shutdown_irq,
+ .irq_mask = leon_mask_irq,
+ .irq_unmask = leon_unmask_irq,
+ .irq_eoi = leon_eoi_irq,
+};
+
+/*
+ * Build a LEON IRQ for the edge triggered LEON IRQ controller:
+ * Edge (normal) IRQ - handle_simple_irq, ack=DONT-CARE, never ack
+ * Level IRQ (PCI|Level-GPIO) - handle_fasteoi_irq, ack=1, ack after ISR
+ * Per-CPU Edge - handle_percpu_irq, ack=0
+ */
+unsigned int leon_build_device_irq(unsigned int real_irq,
+ irq_flow_handler_t flow_handler,
+ const char *name, int do_ack)
+{
+ unsigned int irq;
+ unsigned long mask;
+
+ irq = 0;
+ mask = get_irqmask(real_irq);
+ if (mask == 0)
+ goto out;
+
+ irq = irq_alloc(real_irq, real_irq);
+ if (irq == 0)
+ goto out;
+
+ if (do_ack)
+ mask |= LEON_DO_ACK_HW;
+
+ irq_set_chip_and_handler_name(irq, &leon_irq,
+ flow_handler, name);
+ irq_set_chip_data(irq, (void *)mask);
+
+out:
+ return irq;
+}
+
+static unsigned int _leon_build_device_irq(struct platform_device *op,
+ unsigned int real_irq)
+{
+ return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
}
void __init leon_init_timers(irq_handler_t counter_fn)
{
- int irq;
+ int irq, eirq;
struct device_node *rootnp, *np, *nnp;
struct property *pp;
int len;
int cpu, icsel;
int ampopts;
+ int err;
leondebug_irq_disable = 0;
leon_debug_irqout = 0;
&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
#ifdef CONFIG_SMP
- leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs;
- leon_percpu_timer_dev[0].irq = leon3_gptimer_irq + 1 +
- leon3_gptimer_idx;
+ leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
(1<<LEON3_GPTIMER_SEPIRQ))) {
icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[cpu/8]);
icsel = (icsel >> ((7 - (cpu&0x7)) * 4)) & 0xf;
leon3_irqctrl_regs += icsel;
+
+ /* Probe extended IRQ controller */
+ eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
+ >> 16) & 0xf;
+ if (eirq != 0)
+ leon_eirq_setup(eirq);
} else {
goto bad;
}
- irq = request_irq(leon3_gptimer_irq+leon3_gptimer_idx,
- counter_fn,
- (IRQF_DISABLED | SA_STATIC_ALLOC), "timer", NULL);
+ irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
+ err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
- if (irq) {
+ if (err) {
printk(KERN_ERR "leon_time_init: unable to attach IRQ%d\n",
- LEON_INTERRUPT_TIMER1);
+ irq);
prom_halt();
}
-# ifdef CONFIG_SMP
- {
- unsigned long flags;
- struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)];
-
- /* For SMP we use the level 14 ticker, however the bootup code
- * has copied the firmwares level 14 vector into boot cpu's
- * trap table, we must fix this now or we get squashed.
- */
- local_irq_save(flags);
-
- patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
-
- /* Adjust so that we jump directly to smpleon_ticker */
- trap_table->inst_three += smpleon_ticker - real_irq_entry;
-
- local_flush_cache_all();
- local_irq_restore(flags);
- }
-# endif
-
if (leon3_gptimer_regs) {
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
LEON3_GPTIMER_EN |
LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
#ifdef CONFIG_SMP
+ /* Install per-cpu IRQ handler for broadcasted ticker */
+ irq = leon_build_device_irq(leon3_ticker_irq,
+ handle_percpu_irq, "per-cpu",
+ 0);
+ err = request_irq(irq, leon_percpu_timer_interrupt,
+ IRQF_PERCPU | IRQF_TIMER, "ticker",
+ NULL);
+ if (err) {
+ printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
+ prom_halt();
+ }
+
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
LEON3_GPTIMER_EN |
LEON3_GPTIMER_RL |
{
unsigned long mask, flags, *addr;
mask = get_irqmask(irq_nr);
- local_irq_save(flags);
+ spin_lock_irqsave(&leon_irq_lock, flags);
addr = (unsigned long *)&(leon3_irqctrl_regs->mask[cpu]);
LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | (mask)));
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&leon_irq_lock, flags);
}
#endif
void __init leon_init_IRQ(void)
{
- sparc_irq_config.init_timers = leon_init_timers;
-
- BTFIXUPSET_CALL(enable_irq, leon_enable_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(disable_irq, leon_disable_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(enable_pil_irq, leon_enable_irq, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(disable_pil_irq, leon_disable_irq, BTFIXUPCALL_NORM);
+ sparc_irq_config.init_timers = leon_init_timers;
+ sparc_irq_config.build_device_irq = _leon_build_device_irq;
BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
BTFIXUPCALL_NORM);
projects / cascardo / linux.git / blobdiff