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sparc32,leon: per-cpu ticker use genirq per-cpu handler

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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 2011-04-19 23:41:23 +00:00 committed by David S. Miller
parent 4c6773c395
commit 2cf9530420
4 changed files with 22 additions and 51 deletions
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6
arch/sparc/include/asm/leon.h
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@ -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[];

16
arch/sparc/kernel/entry.S
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@ -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:

39
arch/sparc/kernel/leon_kernel.c
View File

@ -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 |

12
arch/sparc/kernel/leon_smp.c
View File

@ -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)