mirror of https://gitee.com/openkylin/linux.git
sparc32,leon: per-cpu ticker use genirq per-cpu handler
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Hellstrom
David S. Miller
parent
4c6773c395
commit
2cf9530420
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@ -239,7 +239,7 @@ static inline int sparc_leon3_cpuid(void)
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#ifdef CONFIG_SMP
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# define LEON3_IRQ_RESCHEDULE 13
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# define LEON3_IRQ_TICKER (leon_percpu_timer_dev[0].irq)
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# define LEON3_IRQ_TICKER (leon3_ticker_irq)
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# define LEON3_IRQ_CROSS_CALL 15
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#endif
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@ -357,6 +357,7 @@ extern void leon3_getCacheRegs(struct leon3_cacheregs *regs);
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extern int leon_flush_needed(void);
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extern void leon_switch_mm(void);
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extern int srmmu_swprobe_trace;
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extern int leon3_ticker_irq;
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#ifdef CONFIG_SMP
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extern int leon_smp_nrcpus(void);
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@ -371,8 +372,9 @@ extern void init_IRQ(void);
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extern void cpu_panic(void);
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extern int __leon_processor_id(void);
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void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);
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extern irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused);
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extern unsigned int real_irq_entry[], smpleon_ticker[];
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extern unsigned int real_irq_entry[];
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extern unsigned int patchme_maybe_smp_msg[];
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extern unsigned int t_nmi[], linux_trap_ipi15_leon[];
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extern unsigned int linux_trap_ipi15_sun4m[];
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@ -401,22 +401,6 @@ linux_trap_ipi15_sun4d:
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1: b,a 1b
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#ifdef CONFIG_SPARC_LEON
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.globl smpleon_ticker
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/* SMP per-cpu ticker interrupts are handled specially. */
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smpleon_ticker:
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SAVE_ALL
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or %l0, PSR_PIL, %g2
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wr %g2, 0x0, %psr
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WRITE_PAUSE
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wr %g2, PSR_ET, %psr
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WRITE_PAUSE
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call leon_percpu_timer_interrupt
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add %sp, STACKFRAME_SZ, %o0
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wr %l0, PSR_ET, %psr
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WRITE_PAUSE
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RESTORE_ALL
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.align 4
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.globl linux_trap_ipi15_leon
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linux_trap_ipi15_leon:
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@ -26,7 +26,6 @@
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struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
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struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */
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struct amba_apb_device leon_percpu_timer_dev[16];
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int leondebug_irq_disable;
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int leon_debug_irqout;
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@ -36,6 +35,7 @@ static DEFINE_SPINLOCK(leon_irq_lock);
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unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
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unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
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int leon3_ticker_irq; /* Timer ticker IRQ */
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unsigned int sparc_leon_eirq;
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#define LEON_IMASK (&leon3_irqctrl_regs->mask[0])
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#define LEON_IACK (&leon3_irqctrl_regs->iclear)
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@ -271,9 +271,7 @@ void __init leon_init_timers(irq_handler_t counter_fn)
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&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
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#ifdef CONFIG_SMP
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leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs;
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leon_percpu_timer_dev[0].irq = leon3_gptimer_irq + 1 +
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leon3_gptimer_idx;
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leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
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if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
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(1<<LEON3_GPTIMER_SEPIRQ))) {
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@ -322,27 +320,6 @@ void __init leon_init_timers(irq_handler_t counter_fn)
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prom_halt();
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}
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# ifdef CONFIG_SMP
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{
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unsigned long flags;
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struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)];
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/* For SMP we use the level 14 ticker, however the bootup code
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* has copied the firmwares level 14 vector into boot cpu's
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* trap table, we must fix this now or we get squashed.
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*/
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local_irq_save(flags);
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patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
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/* Adjust so that we jump directly to smpleon_ticker */
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trap_table->inst_three += smpleon_ticker - real_irq_entry;
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local_flush_cache_all();
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local_irq_restore(flags);
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}
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# endif
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if (leon3_gptimer_regs) {
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LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
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LEON3_GPTIMER_EN |
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@ -350,6 +327,18 @@ void __init leon_init_timers(irq_handler_t counter_fn)
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LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
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#ifdef CONFIG_SMP
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/* Install per-cpu IRQ handler for broadcasted ticker */
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irq = leon_build_device_irq(leon3_ticker_irq,
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handle_percpu_irq, "per-cpu",
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0);
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err = request_irq(irq, leon_percpu_timer_interrupt,
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IRQF_PERCPU | IRQF_TIMER, "ticker",
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NULL);
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if (err) {
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printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
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prom_halt();
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}
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LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
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LEON3_GPTIMER_EN |
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LEON3_GPTIMER_RL |
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@ -386,27 +386,23 @@ void leon_cross_call_irq(void)
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ccall_info.processors_out[i] = 1;
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}
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void leon_percpu_timer_interrupt(struct pt_regs *regs)
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irqreturn_t leon_percpu_timer_interrupt(int irq, void *unused)
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{
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struct pt_regs *old_regs;
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int cpu = smp_processor_id();
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old_regs = set_irq_regs(regs);
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leon_clear_profile_irq(cpu);
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profile_tick(CPU_PROFILING);
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if (!--prof_counter(cpu)) {
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int user = user_mode(regs);
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int user = user_mode(get_irq_regs());
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irq_enter();
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update_process_times(user);
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irq_exit();
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prof_counter(cpu) = prof_multiplier(cpu);
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}
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set_irq_regs(old_regs);
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return IRQ_HANDLED;
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}
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static void __init smp_setup_percpu_timer(void)
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