#include <asm/atomic.h>
#include <asm/traps.h>
-#define IPIPE_ARCH_STRING "1.8-00"
+#define IPIPE_ARCH_STRING "1.9-00"
#define IPIPE_MAJOR_NUMBER 1
-#define IPIPE_MINOR_NUMBER 8
+#define IPIPE_MINOR_NUMBER 9
#define IPIPE_PATCH_NUMBER 0
#ifdef CONFIG_SMP
"%2 = CYCLES2\n" \
"CC = %2 == %0\n" \
"if ! CC jump 1b\n" \
- : "=r" (((unsigned long *)&t)[1]), \
- "=r" (((unsigned long *)&t)[0]), \
- "=r" (__cy2) \
+ : "=d,a" (((unsigned long *)&t)[1]), \
+ "=d,a" (((unsigned long *)&t)[0]), \
+ "=d,a" (__cy2) \
: /*no input*/ : "CC"); \
t; \
})
#define __ipipe_disable_irq(irq) (irq_desc[irq].chip->mask(irq))
-#define __ipipe_lock_root() \
- set_bit(IPIPE_ROOTLOCK_FLAG, &ipipe_root_domain->flags)
+static inline int __ipipe_check_tickdev(const char *devname)
+{
+ return 1;
+}
-#define __ipipe_unlock_root() \
- clear_bit(IPIPE_ROOTLOCK_FLAG, &ipipe_root_domain->flags)
+static inline void __ipipe_lock_root(void)
+{
+ set_bit(IPIPE_SYNCDEFER_FLAG, &ipipe_root_cpudom_var(status));
+}
+
+static inline void __ipipe_unlock_root(void)
+{
+ clear_bit(IPIPE_SYNCDEFER_FLAG, &ipipe_root_cpudom_var(status));
+}
void __ipipe_enable_pipeline(void);
#define __ipipe_hook_critical_ipi(ipd) do { } while (0)
-#define __ipipe_sync_pipeline(syncmask) \
- do { \
- struct ipipe_domain *ipd = ipipe_current_domain; \
- if (likely(ipd != ipipe_root_domain || !test_bit(IPIPE_ROOTLOCK_FLAG, &ipd->flags))) \
- __ipipe_sync_stage(syncmask); \
- } while (0)
+#define __ipipe_sync_pipeline ___ipipe_sync_pipeline
+void ___ipipe_sync_pipeline(unsigned long syncmask);
void __ipipe_handle_irq(unsigned irq, struct pt_regs *regs);
int __ipipe_get_irq_priority(unsigned irq);
-int __ipipe_get_irqthread_priority(unsigned irq);
-
void __ipipe_stall_root_raw(void);
void __ipipe_unstall_root_raw(void);
void __ipipe_serial_debug(const char *fmt, ...);
+asmlinkage void __ipipe_call_irqtail(unsigned long addr);
+
DECLARE_PER_CPU(struct pt_regs, __ipipe_tick_regs);
extern unsigned long __ipipe_core_clock;
#define __ipipe_run_irqtail() /* Must be a macro */ \
do { \
- asmlinkage void __ipipe_call_irqtail(void); \
unsigned long __pending; \
- CSYNC(); \
+ CSYNC(); \
__pending = bfin_read_IPEND(); \
if (__pending & 0x8000) { \
__pending &= ~0x8010; \
if (__pending && (__pending & (__pending - 1)) == 0) \
- __ipipe_call_irqtail(); \
+ __ipipe_call_irqtail(__ipipe_irq_tail_hook); \
} \
} while (0)
#define __ipipe_run_isr(ipd, irq) \
do { \
if (ipd == ipipe_root_domain) { \
- /* \
- * Note: the I-pipe implements a threaded interrupt model on \
- * this arch for Linux external IRQs. The interrupt handler we \
- * call here only wakes up the associated IRQ thread. \
- */ \
- if (ipipe_virtual_irq_p(irq)) { \
- /* No irqtail here; virtual interrupts have no effect \
- on IPEND so there is no need for processing \
- deferral. */ \
- local_irq_enable_nohead(ipd); \
+ local_irq_enable_hw(); \
+ if (ipipe_virtual_irq_p(irq)) \
ipd->irqs[irq].handler(irq, ipd->irqs[irq].cookie); \
- local_irq_disable_nohead(ipd); \
- } else \
- /* \
- * No need to run the irqtail here either; \
- * we can't be preempted by hw IRQs, so \
- * non-Linux IRQs cannot stack over the short \
- * thread wakeup code. Which in turn means \
- * that no irqtail condition could be pending \
- * for domains above Linux in the pipeline. \
- */ \
+ else \
ipd->irqs[irq].handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs)); \
+ local_irq_disable_hw(); \
} else { \
__clear_bit(IPIPE_SYNC_FLAG, &ipipe_cpudom_var(ipd, status)); \
local_irq_enable_nohead(ipd); \
int ipipe_start_irq_thread(unsigned irq, struct irq_desc *desc);
-#define IS_SYSIRQ(irq) ((irq) > IRQ_CORETMR && (irq) <= SYS_IRQS)
-#define IS_GPIOIRQ(irq) ((irq) >= GPIO_IRQ_BASE && (irq) < NR_IRQS)
-
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+#define IRQ_SYSTMR IRQ_CORETMR
+#define IRQ_PRIOTMR IRQ_CORETMR
+#else
#define IRQ_SYSTMR IRQ_TIMER0
#define IRQ_PRIOTMR CONFIG_IRQ_TIMER0
+#endif
-#if defined(CONFIG_BF531) || defined(CONFIG_BF532) || defined(CONFIG_BF533)
-#define PRIO_GPIODEMUX(irq) CONFIG_PFA
-#elif defined(CONFIG_BF534) || defined(CONFIG_BF536) || defined(CONFIG_BF537)
-#define PRIO_GPIODEMUX(irq) CONFIG_IRQ_PROG_INTA
-#elif defined(CONFIG_BF52x)
-#define PRIO_GPIODEMUX(irq) ((irq) == IRQ_PORTF_INTA ? CONFIG_IRQ_PORTF_INTA : \
- (irq) == IRQ_PORTG_INTA ? CONFIG_IRQ_PORTG_INTA : \
- (irq) == IRQ_PORTH_INTA ? CONFIG_IRQ_PORTH_INTA : \
- -1)
-#elif defined(CONFIG_BF561)
-#define PRIO_GPIODEMUX(irq) ((irq) == IRQ_PROG0_INTA ? CONFIG_IRQ_PROG0_INTA : \
- (irq) == IRQ_PROG1_INTA ? CONFIG_IRQ_PROG1_INTA : \
- (irq) == IRQ_PROG2_INTA ? CONFIG_IRQ_PROG2_INTA : \
- -1)
+#ifdef CONFIG_BF561
#define bfin_write_TIMER_DISABLE(val) bfin_write_TMRS8_DISABLE(val)
#define bfin_write_TIMER_ENABLE(val) bfin_write_TMRS8_ENABLE(val)
#define bfin_write_TIMER_STATUS(val) bfin_write_TMRS8_STATUS(val)
#define bfin_read_TIMER_STATUS() bfin_read_TMRS8_STATUS()
#elif defined(CONFIG_BF54x)
-#define PRIO_GPIODEMUX(irq) ((irq) == IRQ_PINT0 ? CONFIG_IRQ_PINT0 : \
- (irq) == IRQ_PINT1 ? CONFIG_IRQ_PINT1 : \
- (irq) == IRQ_PINT2 ? CONFIG_IRQ_PINT2 : \
- (irq) == IRQ_PINT3 ? CONFIG_IRQ_PINT3 : \
- -1)
#define bfin_write_TIMER_DISABLE(val) bfin_write_TIMER_DISABLE0(val)
#define bfin_write_TIMER_ENABLE(val) bfin_write_TIMER_ENABLE0(val)
#define bfin_write_TIMER_STATUS(val) bfin_write_TIMER_STATUS0(val)
#define bfin_read_TIMER_STATUS(val) bfin_read_TIMER_STATUS0(val)
-#else
-# error "no PRIO_GPIODEMUX() for this part"
#endif
#define __ipipe_root_tick_p(regs) ((regs->ipend & 0x10) != 0)
#endif /* !CONFIG_IPIPE */
+#define ipipe_update_tick_evtdev(evtdev) do { } while (0)
+
#endif /* !__ASM_BLACKFIN_IPIPE_H */
/* -*- linux-c -*-
- * include/asm-blackfin/_baseipipe.h
+ * include/asm-blackfin/ipipe_base.h
*
* Copyright (C) 2007 Philippe Gerum.
*
#define IPIPE_NR_XIRQS NR_IRQS
#define IPIPE_IRQ_ISHIFT 5 /* 2^5 for 32bits arch. */
-/* Blackfin-specific, global domain flags */
-#define IPIPE_ROOTLOCK_FLAG 1 /* Lock pipeline for root */
+/* Blackfin-specific, per-cpu pipeline status */
+#define IPIPE_SYNCDEFER_FLAG 15
+#define IPIPE_SYNCDEFER_MASK (1L << IPIPE_SYNCDEFER_MASK)
/* Blackfin traps -- i.e. exception vector numbers */
#define IPIPE_NR_FAULTS 52 /* We leave a gap after VEC_ILL_RES. */
#ifndef __ASSEMBLY__
-#include <linux/bitops.h>
-
-extern int test_bit(int nr, const void *addr);
-
-
extern unsigned long __ipipe_root_status; /* Alias to ipipe_root_cpudom_var(status) */
static inline void __ipipe_stall_root(void)
#define raw_irqs_disabled_flags(flags) (!irqs_enabled_from_flags_hw(flags))
#define local_test_iflag_hw(x) irqs_enabled_from_flags_hw(x)
-#define local_save_flags(x) \
- do { \
- (x) = __ipipe_test_root() ? \
+#define local_save_flags(x) \
+ do { \
+ (x) = __ipipe_test_root() ? \
__all_masked_irq_flags : bfin_irq_flags; \
+ barrier(); \
} while (0)
-#define local_irq_save(x) \
- do { \
- (x) = __ipipe_test_and_stall_root(); \
+#define local_irq_save(x) \
+ do { \
+ (x) = __ipipe_test_and_stall_root() ? \
+ __all_masked_irq_flags : bfin_irq_flags; \
+ barrier(); \
+ } while (0)
+
+static inline void local_irq_restore(unsigned long x)
+{
+ barrier();
+ __ipipe_restore_root(x == __all_masked_irq_flags);
+}
+
+#define local_irq_disable() \
+ do { \
+ __ipipe_stall_root(); \
+ barrier(); \
} while (0)
-#define local_irq_restore(x) __ipipe_restore_root(x)
-#define local_irq_disable() __ipipe_stall_root()
-#define local_irq_enable() __ipipe_unstall_root()
+static inline void local_irq_enable(void)
+{
+ barrier();
+ __ipipe_unstall_root();
+}
+
#define irqs_disabled() __ipipe_test_root()
#define local_save_flags_hw(x) \
#define TIF_MEMDIE 4
#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
#define TIF_FREEZE 6 /* is freezing for suspend */
+#define TIF_IRQ_SYNC 7 /* sync pipeline stage */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_FREEZE (1<<TIF_FREEZE)
+#define _TIF_IRQ_SYNC (1<<TIF_IRQ_SYNC)
#define _TIF_WORK_MASK 0x0000FFFE /* work to do on interrupt/exception return */
#include <asm/atomic.h>
#include <asm/io.h>
-static int create_irq_threads;
-
DEFINE_PER_CPU(struct pt_regs, __ipipe_tick_regs);
-static DEFINE_PER_CPU(unsigned long, pending_irqthread_mask);
-
-static DEFINE_PER_CPU(int [IVG13 + 1], pending_irq_count);
-
asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs);
static void __ipipe_no_irqtail(void);
*/
void __ipipe_handle_irq(unsigned irq, struct pt_regs *regs)
{
+ struct ipipe_percpu_domain_data *p = ipipe_root_cpudom_ptr();
struct ipipe_domain *this_domain, *next_domain;
struct list_head *head, *pos;
int m_ack, s = -1;
* interrupt.
*/
m_ack = (regs == NULL || irq == IRQ_SYSTMR || irq == IRQ_CORETMR);
-
this_domain = ipipe_current_domain;
if (unlikely(test_bit(IPIPE_STICKY_FLAG, &this_domain->irqs[irq].control)))
next_domain = list_entry(head, struct ipipe_domain, p_link);
if (likely(test_bit(IPIPE_WIRED_FLAG, &next_domain->irqs[irq].control))) {
if (!m_ack && next_domain->irqs[irq].acknowledge != NULL)
- next_domain->irqs[irq].acknowledge(irq, irq_desc + irq);
- if (test_bit(IPIPE_ROOTLOCK_FLAG, &ipipe_root_domain->flags))
- s = __test_and_set_bit(IPIPE_STALL_FLAG,
- &ipipe_root_cpudom_var(status));
+ next_domain->irqs[irq].acknowledge(irq, irq_to_desc(irq));
+ if (test_bit(IPIPE_SYNCDEFER_FLAG, &p->status))
+ s = __test_and_set_bit(IPIPE_STALL_FLAG, &p->status);
__ipipe_dispatch_wired(next_domain, irq);
- goto finalize;
- return;
+ goto out;
}
}
/* Ack the interrupt. */
pos = head;
-
while (pos != &__ipipe_pipeline) {
next_domain = list_entry(pos, struct ipipe_domain, p_link);
- /*
- * For each domain handling the incoming IRQ, mark it
- * as pending in its log.
- */
if (test_bit(IPIPE_HANDLE_FLAG, &next_domain->irqs[irq].control)) {
- /*
- * Domains that handle this IRQ are polled for
- * acknowledging it by decreasing priority
- * order. The interrupt must be made pending
- * _first_ in the domain's status flags before
- * the PIC is unlocked.
- */
__ipipe_set_irq_pending(next_domain, irq);
-
if (!m_ack && next_domain->irqs[irq].acknowledge != NULL) {
- next_domain->irqs[irq].acknowledge(irq, irq_desc + irq);
+ next_domain->irqs[irq].acknowledge(irq, irq_to_desc(irq));
m_ack = 1;
}
}
-
- /*
- * If the domain does not want the IRQ to be passed
- * down the interrupt pipe, exit the loop now.
- */
if (!test_bit(IPIPE_PASS_FLAG, &next_domain->irqs[irq].control))
break;
-
pos = next_domain->p_link.next;
}
* immediately to the current domain if the interrupt has been
* marked as 'sticky'. This search does not go beyond the
* current domain in the pipeline. We also enforce the
- * additional root stage lock (blackfin-specific). */
+ * additional root stage lock (blackfin-specific).
+ */
+ if (test_bit(IPIPE_SYNCDEFER_FLAG, &p->status))
+ s = __test_and_set_bit(IPIPE_STALL_FLAG, &p->status);
- if (test_bit(IPIPE_ROOTLOCK_FLAG, &ipipe_root_domain->flags))
- s = __test_and_set_bit(IPIPE_STALL_FLAG,
- &ipipe_root_cpudom_var(status));
-finalize:
+ /*
+ * If the interrupt preempted the head domain, then do not
+ * even try to walk the pipeline, unless an interrupt is
+ * pending for it.
+ */
+ if (test_bit(IPIPE_AHEAD_FLAG, &this_domain->flags) &&
+ ipipe_head_cpudom_var(irqpend_himask) == 0)
+ goto out;
__ipipe_walk_pipeline(head);
-
+out:
if (!s)
- __clear_bit(IPIPE_STALL_FLAG,
- &ipipe_root_cpudom_var(status));
+ __clear_bit(IPIPE_STALL_FLAG, &p->status);
}
int __ipipe_check_root(void)
void __ipipe_enable_irqdesc(struct ipipe_domain *ipd, unsigned irq)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
int prio = desc->ic_prio;
desc->depth = 0;
void __ipipe_disable_irqdesc(struct ipipe_domain *ipd, unsigned irq)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
int prio = desc->ic_prio;
if (ipd != &ipipe_root &&
{
unsigned long flags;
- /* We need to run the IRQ tail hook whenever we don't
+ /*
+ * We need to run the IRQ tail hook whenever we don't
* propagate a syscall to higher domains, because we know that
* important operations might be pending there (e.g. Xenomai
- * deferred rescheduling). */
+ * deferred rescheduling).
+ */
- if (!__ipipe_syscall_watched_p(current, regs->orig_p0)) {
+ if (regs->orig_p0 < NR_syscalls) {
void (*hook)(void) = (void (*)(void))__ipipe_irq_tail_hook;
hook();
- return 0;
+ if ((current->flags & PF_EVNOTIFY) == 0)
+ return 0;
}
/*
{
unsigned long flags;
+#ifdef CONFIG_IPIPE_DEBUG
if (irq >= IPIPE_NR_IRQS ||
(ipipe_virtual_irq_p(irq)
&& !test_bit(irq - IPIPE_VIRQ_BASE, &__ipipe_virtual_irq_map)))
return -EINVAL;
+#endif
local_irq_save_hw(flags);
-
__ipipe_handle_irq(irq, NULL);
-
local_irq_restore_hw(flags);
return 1;
}
-/* Move Linux IRQ to threads. */
-
-static int do_irqd(void *__desc)
+asmlinkage void __ipipe_sync_root(void)
{
- struct irq_desc *desc = __desc;
- unsigned irq = desc - irq_desc;
- int thrprio = desc->thr_prio;
- int thrmask = 1 << thrprio;
- int cpu = smp_processor_id();
- cpumask_t cpumask;
-
- sigfillset(¤t->blocked);
- current->flags |= PF_NOFREEZE;
- cpumask = cpumask_of_cpu(cpu);
- set_cpus_allowed(current, cpumask);
- ipipe_setscheduler_root(current, SCHED_FIFO, 50 + thrprio);
-
- while (!kthread_should_stop()) {
- local_irq_disable();
- if (!(desc->status & IRQ_SCHEDULED)) {
- set_current_state(TASK_INTERRUPTIBLE);
-resched:
- local_irq_enable();
- schedule();
- local_irq_disable();
- }
- __set_current_state(TASK_RUNNING);
- /*
- * If higher priority interrupt servers are ready to
- * run, reschedule immediately. We need this for the
- * GPIO demux IRQ handler to unmask the interrupt line
- * _last_, after all GPIO IRQs have run.
- */
- if (per_cpu(pending_irqthread_mask, cpu) & ~(thrmask|(thrmask-1)))
- goto resched;
- if (--per_cpu(pending_irq_count[thrprio], cpu) == 0)
- per_cpu(pending_irqthread_mask, cpu) &= ~thrmask;
- desc->status &= ~IRQ_SCHEDULED;
- desc->thr_handler(irq, &__raw_get_cpu_var(__ipipe_tick_regs));
- local_irq_enable();
- }
- __set_current_state(TASK_RUNNING);
- return 0;
-}
+ unsigned long flags;
-static void kick_irqd(unsigned irq, void *cookie)
-{
- struct irq_desc *desc = irq_desc + irq;
- int thrprio = desc->thr_prio;
- int thrmask = 1 << thrprio;
- int cpu = smp_processor_id();
-
- if (!(desc->status & IRQ_SCHEDULED)) {
- desc->status |= IRQ_SCHEDULED;
- per_cpu(pending_irqthread_mask, cpu) |= thrmask;
- ++per_cpu(pending_irq_count[thrprio], cpu);
- wake_up_process(desc->thread);
- }
-}
+ BUG_ON(irqs_disabled());
-int ipipe_start_irq_thread(unsigned irq, struct irq_desc *desc)
-{
- if (desc->thread || !create_irq_threads)
- return 0;
-
- desc->thread = kthread_create(do_irqd, desc, "IRQ %d", irq);
- if (desc->thread == NULL) {
- printk(KERN_ERR "irqd: could not create IRQ thread %d!\n", irq);
- return -ENOMEM;
- }
+ local_irq_save_hw(flags);
- wake_up_process(desc->thread);
+ clear_thread_flag(TIF_IRQ_SYNC);
- desc->thr_handler = ipipe_root_domain->irqs[irq].handler;
- ipipe_root_domain->irqs[irq].handler = &kick_irqd;
+ if (ipipe_root_cpudom_var(irqpend_himask) != 0)
+ __ipipe_sync_pipeline(IPIPE_IRQMASK_ANY);
- return 0;
+ local_irq_restore_hw(flags);
}
-void __init ipipe_init_irq_threads(void)
+void ___ipipe_sync_pipeline(unsigned long syncmask)
{
- unsigned irq;
- struct irq_desc *desc;
-
- create_irq_threads = 1;
+ struct ipipe_domain *ipd = ipipe_current_domain;
- for (irq = 0; irq < NR_IRQS; irq++) {
- desc = irq_desc + irq;
- if (desc->action != NULL ||
- (desc->status & IRQ_NOREQUEST) != 0)
- ipipe_start_irq_thread(irq, desc);
+ if (ipd == ipipe_root_domain) {
+ if (test_bit(IPIPE_SYNCDEFER_FLAG, &ipipe_root_cpudom_var(status)))
+ return;
}
+
+ __ipipe_sync_stage(syncmask);
}
EXPORT_SYMBOL(show_stack);
#endif
generic_handle_irq(irq);
-#ifndef CONFIG_IPIPE /* Useless and bugous over the I-pipe: IRQs are threaded. */
- /* If we're the only interrupt running (ignoring IRQ15 which is for
- syscalls), lower our priority to IRQ14 so that softirqs run at
- that level. If there's another, lower-level interrupt, irq_exit
- will defer softirqs to that. */
+#ifndef CONFIG_IPIPE
+ /*
+ * If we're the only interrupt running (ignoring IRQ15 which
+ * is for syscalls), lower our priority to IRQ14 so that
+ * softirqs run at that level. If there's another,
+ * lower-level interrupt, irq_exit will defer softirqs to
+ * that. If the interrupt pipeline is enabled, we are already
+ * running at IRQ14 priority, so we don't need this code.
+ */
CSYNC();
pending = bfin_read_IPEND() & ~0x8000;
other_ints = pending & (pending - 1);
write_seqlock(&xtime_lock);
#if defined(CONFIG_TICK_SOURCE_SYSTMR0) && !defined(CONFIG_IPIPE)
-/* FIXME: Here TIMIL0 is not set when IPIPE enabled, why? */
+ /*
+ * TIMIL0 is latched in __ipipe_grab_irq() when the I-Pipe is
+ * enabled.
+ */
if (get_gptimer_status(0) & TIMER_STATUS_TIMIL0) {
#endif
do_timer(1);
p2 = [p2];
[p2+(TASK_THREAD+THREAD_KSP)] = sp;
+#ifdef CONFIG_IPIPE
+ r0 = sp;
+ SP += -12;
+ call ___ipipe_syscall_root;
+ SP += 12;
+ cc = r0 == 1;
+ if cc jump .Lsyscall_really_exit;
+ cc = r0 == -1;
+ if cc jump .Lresume_userspace;
+ r3 = [sp + PT_R3];
+ r4 = [sp + PT_R4];
+ p0 = [sp + PT_ORIG_P0];
+#endif /* CONFIG_IPIPE */
/* Check the System Call */
r7 = __NR_syscall;
r7 = r7 & r4;
.Lsyscall_resched:
+#ifdef CONFIG_IPIPE
+ cc = BITTST(r7, TIF_IRQ_SYNC);
+ if !cc jump .Lsyscall_no_irqsync;
+ [--sp] = reti;
+ r0 = [sp++];
+ SP += -12;
+ call ___ipipe_sync_root;
+ SP += 12;
+ jump .Lresume_userspace_1;
+.Lsyscall_no_irqsync:
+#endif
cc = BITTST(r7, TIF_NEED_RESCHED);
if !cc jump .Lsyscall_sigpending;
.Lsyscall_really_exit:
r5 = [sp + PT_RESERVED];
rets = r5;
+#ifdef CONFIG_IPIPE
+ [--sp] = reti;
+ r5 = [sp++];
+#endif /* CONFIG_IPIPE */
rts;
ENDPROC(_system_call)
ENDPROC(_resume)
ENTRY(_ret_from_exception)
+#ifdef CONFIG_IPIPE
+ [--sp] = rets;
+ SP += -12;
+ call ___ipipe_check_root
+ SP += 12
+ rets = [sp++];
+ cc = r0 == 0;
+ if cc jump 4f; /* not on behalf of Linux, get out */
+#endif /* CONFIG_IPIPE */
p2.l = lo(IPEND);
p2.h = hi(IPEND);
rts;
ENDPROC(_ret_from_exception)
+#ifdef CONFIG_IPIPE
+
+_sync_root_irqs:
+ [--sp] = reti; /* Reenable interrupts */
+ r0 = [sp++];
+ jump.l ___ipipe_sync_root
+
+_resume_kernel_from_int:
+ r0.l = _sync_root_irqs
+ r0.h = _sync_root_irqs
+ [--sp] = rets;
+ [--sp] = ( r7:4, p5:3 );
+ SP += -12;
+ call ___ipipe_call_irqtail
+ SP += 12;
+ ( r7:4, p5:3 ) = [sp++];
+ rets = [sp++];
+ rts
+#else
+#define _resume_kernel_from_int 2f
+#endif
+
ENTRY(_return_from_int)
/* If someone else already raised IRQ 15, do nothing. */
csync;
r1 = r0 - r1;
r2 = r0 & r1;
cc = r2 == 0;
- if !cc jump 2f;
+ if !cc jump _resume_kernel_from_int;
/* Lower the interrupt level to 15. */
p0.l = lo(EVT15);
#ifdef CONFIG_IPIPE
ENTRY(___ipipe_call_irqtail)
+ p0 = r0;
r0.l = 1f;
r0.h = 1f;
reti = r0;
1:
[--sp] = rets;
[--sp] = ( r7:4, p5:3 );
- p0.l = ___ipipe_irq_tail_hook;
- p0.h = ___ipipe_irq_tail_hook;
- p0 = [p0];
sp += -12;
call (p0);
sp += 12;
p0.h = hi(EVT14);
[p0] = r0;
csync;
- r0 = 0x401f;
+ r0 = 0x401f (z);
sti r0;
raise 14;
[--sp] = reti; /* IRQs on. */
p0.h = _bfin_irq_flags;
r0 = [p0];
sti r0;
-#if 0 /* FIXME: this actually raises scheduling latencies */
- /* Reenable interrupts */
- [--sp] = reti;
- r0 = [sp++];
-#endif
rts;
ENDPROC(___ipipe_call_irqtail)
+
#endif /* CONFIG_IPIPE */
static void bfin_internal_mask_irq(unsigned int irq)
{
+ unsigned long flags;
+
#ifdef CONFIG_BF53x
+ local_irq_save_hw(flags);
bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() &
~(1 << SIC_SYSIRQ(irq)));
#else
unsigned mask_bank, mask_bit;
+ local_irq_save_hw(flags);
mask_bank = SIC_SYSIRQ(irq) / 32;
mask_bit = SIC_SYSIRQ(irq) % 32;
bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) &
~(1 << mask_bit));
#endif
#endif
+ local_irq_restore_hw(flags);
}
static void bfin_internal_unmask_irq(unsigned int irq)
{
+ unsigned long flags;
+
#ifdef CONFIG_BF53x
+ local_irq_save_hw(flags);
bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() |
(1 << SIC_SYSIRQ(irq)));
#else
unsigned mask_bank, mask_bit;
+ local_irq_save_hw(flags);
mask_bank = SIC_SYSIRQ(irq) / 32;
mask_bit = SIC_SYSIRQ(irq) % 32;
bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) |
(1 << mask_bit));
#endif
#endif
+ local_irq_restore_hw(flags);
}
#ifdef CONFIG_PM
static inline void bfin_set_irq_handler(unsigned irq, irq_flow_handler_t handle)
{
#ifdef CONFIG_IPIPE
- _set_irq_handler(irq, handle_edge_irq);
+ _set_irq_handler(irq, handle_level_irq);
#else
struct irq_desc *desc = irq_desc + irq;
/* May not call generic set_irq_handler() due to spinlock
#endif
default:
#ifdef CONFIG_IPIPE
- /*
- * We want internal interrupt sources to be masked, because
- * ISRs may trigger interrupts recursively (e.g. DMA), but
- * interrupts are _not_ masked at CPU level. So let's handle
- * them as level interrupts.
- */
- set_irq_handler(irq, handle_level_irq);
+ /*
+ * We want internal interrupt sources to be
+ * masked, because ISRs may trigger interrupts
+ * recursively (e.g. DMA), but interrupts are
+ * _not_ masked at CPU level. So let's handle
+ * most of them as level interrupts, except
+ * the timer interrupt which is special.
+ */
+ if (irq == IRQ_SYSTMR || irq == IRQ_CORETMR)
+ set_irq_handler(irq, handle_simple_irq);
+ else
+ set_irq_handler(irq, handle_level_irq);
#else /* !CONFIG_IPIPE */
set_irq_handler(irq, handle_simple_irq);
#endif /* !CONFIG_IPIPE */
#ifdef CONFIG_IPIPE
for (irq = 0; irq < NR_IRQS; irq++) {
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
desc->ic_prio = __ipipe_get_irq_priority(irq);
- desc->thr_prio = __ipipe_get_irqthread_priority(irq);
}
#endif /* CONFIG_IPIPE */
return IVG15;
}
-int __ipipe_get_irqthread_priority(unsigned irq)
-{
- int ient, prio;
- int demux_irq;
-
- /* The returned priority value is rescaled to [0..IVG13+1]
- * with 0 being the lowest effective priority level. */
-
- if (irq <= IRQ_CORETMR)
- return IVG13 - irq + 1;
-
- /* GPIO IRQs are given the priority of the demux
- * interrupt. */
- if (IS_GPIOIRQ(irq)) {
-#if defined(CONFIG_BF54x)
- u32 bank = PINT_2_BANK(irq2pint_lut[irq - SYS_IRQS]);
- demux_irq = (bank == 0 ? IRQ_PINT0 :
- bank == 1 ? IRQ_PINT1 :
- bank == 2 ? IRQ_PINT2 :
- IRQ_PINT3);
-#elif defined(CONFIG_BF561)
- demux_irq = (irq >= IRQ_PF32 ? IRQ_PROG2_INTA :
- irq >= IRQ_PF16 ? IRQ_PROG1_INTA :
- IRQ_PROG0_INTA);
-#elif defined(CONFIG_BF52x)
- demux_irq = (irq >= IRQ_PH0 ? IRQ_PORTH_INTA :
- irq >= IRQ_PG0 ? IRQ_PORTG_INTA :
- IRQ_PORTF_INTA);
-#else
- demux_irq = irq;
-#endif
- return IVG13 - PRIO_GPIODEMUX(demux_irq) + 1;
- }
-
- /* The GPIO demux interrupt is given a lower priority
- * than the GPIO IRQs, so that its threaded handler
- * unmasks the interrupt line after the decoded IRQs
- * have been processed. */
- prio = PRIO_GPIODEMUX(irq);
- /* demux irq? */
- if (prio != -1)
- return IVG13 - prio;
-
- for (ient = 0; ient < NR_PERI_INTS; ient++) {
- struct ivgx *ivg = ivg_table + ient;
- if (ivg->irqno == irq) {
- for (prio = 0; prio <= IVG13-IVG7; prio++) {
- if (ivg7_13[prio].ifirst <= ivg &&
- ivg7_13[prio].istop > ivg)
- return IVG7 - prio;
- }
- }
- }
-
- return 0;
-}
-
/* Hw interrupts are disabled on entry (check SAVE_CONTEXT). */
#ifdef CONFIG_DO_IRQ_L1
__attribute__((l1_text))
#endif
asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs)
{
+ struct ipipe_percpu_domain_data *p = ipipe_root_cpudom_ptr();
+ struct ipipe_domain *this_domain = ipipe_current_domain;
struct ivgx *ivg_stop = ivg7_13[vec-IVG7].istop;
struct ivgx *ivg = ivg7_13[vec-IVG7].ifirst;
- int irq;
+ int irq, s;
if (likely(vec == EVT_IVTMR_P)) {
irq = IRQ_CORETMR;
- goto handle_irq;
+ goto core_tick;
}
SSYNC();
irq = ivg->irqno;
if (irq == IRQ_SYSTMR) {
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+core_tick:
+#else
bfin_write_TIMER_STATUS(1); /* Latch TIMIL0 */
+#endif
/* This is basically what we need from the register frame. */
__raw_get_cpu_var(__ipipe_tick_regs).ipend = regs->ipend;
__raw_get_cpu_var(__ipipe_tick_regs).pc = regs->pc;
- if (!ipipe_root_domain_p)
- __raw_get_cpu_var(__ipipe_tick_regs).ipend |= 0x10;
- else
+ if (this_domain != ipipe_root_domain)
__raw_get_cpu_var(__ipipe_tick_regs).ipend &= ~0x10;
+ else
+ __raw_get_cpu_var(__ipipe_tick_regs).ipend |= 0x10;
}
-handle_irq:
+#ifndef CONFIG_GENERIC_CLOCKEVENTS
+core_tick:
+#endif
+ if (this_domain == ipipe_root_domain) {
+ s = __test_and_set_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
+ barrier();
+ }
ipipe_trace_irq_entry(irq);
__ipipe_handle_irq(irq, regs);
- ipipe_trace_irq_exit(irq);
+ ipipe_trace_irq_exit(irq);
- if (ipipe_root_domain_p)
- return !test_bit(IPIPE_STALL_FLAG, &ipipe_root_cpudom_var(status));
+ if (this_domain == ipipe_root_domain) {
+ set_thread_flag(TIF_IRQ_SYNC);
+ if (!s) {
+ __clear_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
+ return !test_bit(IPIPE_STALL_FLAG, &p->status);
+ }
+ }
return 0;
}
projects / linux-2.6-microblaze.git / commitdiff