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38f7f8f05e
On Sun4d systems running in SMP mode, IRQ 14 is used for timer interrupts and has a specialized interrupt handler. IPI is currently set to use IRQ 14 as well, which causes it to trigger the timer interrupt handler, and not the IPI interrupt handler. The IPI interrupt is therefore changed to IRQ 13, which is the highest normally handled interrupt. This IRQ is also used for SBUS interrupts, however there is nothing in the IPI/SBUS interrupt handlers that indicate that they will not handle sharing the interrupt. (IRQ 13 is indicated as audio interrupt, which is unlikely to be found in a sun4d system) Signed-off-by: Kjetil Oftedal <oftedal@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
#include <linux/platform_device.h>
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#include <asm/btfixup.h>
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struct irq_bucket {
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struct irq_bucket *next;
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unsigned int real_irq;
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unsigned int irq;
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unsigned int pil;
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};
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#define SUN4D_MAX_BOARD 10
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#define SUN4D_MAX_IRQ ((SUN4D_MAX_BOARD + 2) << 5)
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/* Map between the irq identifier used in hw to the
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* irq_bucket. The map is sufficient large to hold
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* the sun4d hw identifiers.
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*/
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extern struct irq_bucket *irq_map[SUN4D_MAX_IRQ];
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/* sun4m specific type definitions */
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/* This maps direct to CPU specific interrupt registers */
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struct sun4m_irq_percpu {
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u32 pending;
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u32 clear;
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u32 set;
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};
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/* This maps direct to global interrupt registers */
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struct sun4m_irq_global {
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u32 pending;
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u32 mask;
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u32 mask_clear;
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u32 mask_set;
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u32 interrupt_target;
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};
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extern struct sun4m_irq_percpu __iomem *sun4m_irq_percpu[SUN4M_NCPUS];
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extern struct sun4m_irq_global __iomem *sun4m_irq_global;
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/*
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* Platform specific irq configuration
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* The individual platforms assign their platform
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* specifics in their init functions.
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*/
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struct sparc_irq_config {
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void (*init_timers)(irq_handler_t);
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unsigned int (*build_device_irq)(struct platform_device *op,
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unsigned int real_irq);
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};
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extern struct sparc_irq_config sparc_irq_config;
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unsigned int irq_alloc(unsigned int real_irq, unsigned int pil);
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void irq_link(unsigned int irq);
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void irq_unlink(unsigned int irq);
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void handler_irq(unsigned int pil, struct pt_regs *regs);
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/* Dave Redman (djhr@tadpole.co.uk)
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* changed these to function pointers.. it saves cycles and will allow
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* the irq dependencies to be split into different files at a later date
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* sun4c_irq.c, sun4m_irq.c etc so we could reduce the kernel size.
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* Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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* Changed these to btfixup entities... It saves cycles :)
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*/
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BTFIXUPDEF_CALL(void, clear_clock_irq, void)
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BTFIXUPDEF_CALL(void, load_profile_irq, int, unsigned int)
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static inline void clear_clock_irq(void)
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{
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BTFIXUP_CALL(clear_clock_irq)();
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}
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static inline void load_profile_irq(int cpu, int limit)
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{
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BTFIXUP_CALL(load_profile_irq)(cpu, limit);
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}
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#ifdef CONFIG_SMP
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BTFIXUPDEF_CALL(void, set_cpu_int, int, int)
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BTFIXUPDEF_CALL(void, clear_cpu_int, int, int)
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BTFIXUPDEF_CALL(void, set_irq_udt, int)
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#define set_cpu_int(cpu,level) BTFIXUP_CALL(set_cpu_int)(cpu,level)
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#define clear_cpu_int(cpu,level) BTFIXUP_CALL(clear_cpu_int)(cpu,level)
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#define set_irq_udt(cpu) BTFIXUP_CALL(set_irq_udt)(cpu)
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/* All SUN4D IPIs are sent on this IRQ, may be shared with hard IRQs */
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#define SUN4D_IPI_IRQ 13
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extern void sun4d_ipi_interrupt(void);
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#endif
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