@@ -239,7 +239,7 @@ static inline int sparc_leon3_cpuid(void)
#ifdef CONFIG_SMP
# define LEON3_IRQ_RESCHEDULE 13
-# define LEON3_IRQ_TICKER (leon_percpu_timer_dev[0].irq)
+# define LEON3_IRQ_TICKER (leon3_ticker_irq)
# define LEON3_IRQ_CROSS_CALL 15
#endif
@@ -357,6 +357,7 @@ extern void leon3_getCacheRegs(struct leon3_cacheregs *regs);
extern int leon_flush_needed(void);
extern void leon_switch_mm(void);
extern int srmmu_swprobe_trace;
+extern int leon3_ticker_irq;
#ifdef CONFIG_SMP
extern int leon_smp_nrcpus(void);
@@ -371,8 +372,9 @@ extern void init_IRQ(void);
extern void cpu_panic(void);
extern int __leon_processor_id(void);
void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);
+extern irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused);
-extern unsigned int real_irq_entry[], smpleon_ticker[];
+extern unsigned int real_irq_entry[];
extern unsigned int patchme_maybe_smp_msg[];
extern unsigned int t_nmi[], linux_trap_ipi15_leon[];
extern unsigned int linux_trap_ipi15_sun4m[];
@@ -401,22 +401,6 @@ linux_trap_ipi15_sun4d:
1: b,a 1b
#ifdef CONFIG_SPARC_LEON
-
- .globl smpleon_ticker
- /* SMP per-cpu ticker interrupts are handled specially. */
-smpleon_ticker:
- SAVE_ALL
- or %l0, PSR_PIL, %g2
- wr %g2, 0x0, %psr
- WRITE_PAUSE
- wr %g2, PSR_ET, %psr
- WRITE_PAUSE
- call leon_percpu_timer_interrupt
- add %sp, STACKFRAME_SZ, %o0
- wr %l0, PSR_ET, %psr
- WRITE_PAUSE
- RESTORE_ALL
-
.align 4
.globl linux_trap_ipi15_leon
linux_trap_ipi15_leon:
@@ -26,7 +26,6 @@
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;
@@ -36,6 +35,7 @@ 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_IACK (&leon3_irqctrl_regs->iclear)
@@ -271,9 +271,7 @@ void __init leon_init_timers(irq_handler_t counter_fn)
&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))) {
@@ -322,27 +320,6 @@ void __init leon_init_timers(irq_handler_t counter_fn)
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 |
@@ -350,6 +327,18 @@ void __init leon_init_timers(irq_handler_t counter_fn)
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 |
@@ -386,27 +386,23 @@ void leon_cross_call_irq(void)
ccall_info.processors_out[i] = 1;
}
-void leon_percpu_timer_interrupt(struct pt_regs *regs)
+irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused)
{
- struct pt_regs *old_regs;
int cpu = smp_processor_id();
- old_regs = set_irq_regs(regs);
-
leon_clear_profile_irq(cpu);
profile_tick(CPU_PROFILING);
if (!--prof_counter(cpu)) {
- int user = user_mode(regs);
+ int user = user_mode(get_irq_regs());
- irq_enter();
update_process_times(user);
- irq_exit();
prof_counter(cpu) = prof_multiplier(cpu);
}
- set_irq_regs(old_regs);
+
+ return IRQ_HANDLED;
}
static void __init smp_setup_percpu_timer(void)
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> --- arch/sparc/include/asm/leon.h | 6 ++++-- arch/sparc/kernel/entry.S | 16 ---------------- arch/sparc/kernel/leon_kernel.c | 39 ++++++++++++++------------------------- arch/sparc/kernel/leon_smp.c | 12 ++++-------- 4 files changed, 22 insertions(+), 51 deletions(-)