62f082830d
The kernel uses l14 timers as clockevents. l10 timer is used as clocksource if platform master_l10_counter isn't constantly zero. The clocksource is continuous, so it's possible to use high resolution timers. l10 timer is also used as clockevent on UP configurations. This realization is for sun4m, sun4d, sun4c, microsparc-IIep and LEON platforms. The appropriate LEON changes was made by Konrad Eisele. In case of sun4m's oneshot mode, profile irq is zeroed in smp4m_percpu_timer_interrupt(). It is maybe needless (double, triple etc overflow does nothing). sun4d is able to have oneshot mode too, but I haven't any way to test it. So code of its percpu timer handler is made as much equal to the current code as possible. The patch is tested on sun4m box in SMP mode by me, and tested by Konrad on leon in up mode (leon smp is broken atm - due to other reasons). Signed-off-by: Tkhai Kirill <tkhai@yandex.ru> Tested-by: Konrad Eisele <konrad@gaisler.com> [leon up] [sam: revised patch to provide generic support for leon] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
#ifndef __SPARC_KERNEL_H
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#define __SPARC_KERNEL_H
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#include <linux/interrupt.h>
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#include <asm/traps.h>
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#include <asm/head.h>
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#include <asm/io.h>
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/* cpu.c */
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extern const char *sparc_pmu_type;
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extern unsigned int fsr_storage;
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extern int ncpus_probed;
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#ifdef CONFIG_SPARC64
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/* setup_64.c */
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struct seq_file;
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extern void cpucap_info(struct seq_file *);
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static inline unsigned long kimage_addr_to_ra(const char *p)
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{
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unsigned long val = (unsigned long) p;
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return kern_base + (val - KERNBASE);
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}
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#endif
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#ifdef CONFIG_SPARC32
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/* cpu.c */
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extern void cpu_probe(void);
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/* traps_32.c */
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extern void handle_hw_divzero(struct pt_regs *regs, unsigned long pc,
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unsigned long npc, unsigned long psr);
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/* muldiv.c */
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extern int do_user_muldiv (struct pt_regs *, unsigned long);
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/* irq_32.c */
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extern struct irqaction static_irqaction[];
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extern int static_irq_count;
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extern spinlock_t irq_action_lock;
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extern void unexpected_irq(int irq, void *dev_id, struct pt_regs * regs);
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extern void init_IRQ(void);
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/* sun4c_irq.c */
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extern void sun4c_init_IRQ(void);
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/* sun4m_irq.c */
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extern void sun4m_init_IRQ(void);
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extern void sun4m_unmask_profile_irq(void);
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extern void sun4m_clear_profile_irq(int cpu);
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/* sun4d_irq.c */
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extern spinlock_t sun4d_imsk_lock;
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extern void sun4d_init_IRQ(void);
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extern int sun4d_request_irq(unsigned int irq,
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irq_handler_t handler,
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unsigned long irqflags,
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const char *devname, void *dev_id);
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extern int show_sun4d_interrupts(struct seq_file *, void *);
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extern void sun4d_distribute_irqs(void);
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extern void sun4d_free_irq(unsigned int irq, void *dev_id);
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/* head_32.S */
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extern unsigned int t_nmi[];
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extern unsigned int linux_trap_ipi15_sun4d[];
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extern unsigned int linux_trap_ipi15_sun4m[];
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extern struct tt_entry trapbase_cpu1;
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extern struct tt_entry trapbase_cpu2;
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extern struct tt_entry trapbase_cpu3;
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extern char cputypval[];
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/* entry.S */
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extern unsigned long lvl14_save[4];
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extern unsigned int real_irq_entry[];
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extern unsigned int smp4d_ticker[];
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extern unsigned int patchme_maybe_smp_msg[];
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extern void floppy_hardint(void);
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/* trampoline_32.S */
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extern int __smp4m_processor_id(void);
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extern int __smp4d_processor_id(void);
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extern unsigned long sun4m_cpu_startup;
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extern unsigned long sun4d_cpu_startup;
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#else /* CONFIG_SPARC32 */
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#endif /* CONFIG_SPARC32 */
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#endif /* !(__SPARC_KERNEL_H) */
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