6baa9b20a6
The conversion of sparc32 to genirq is based on original work done
by David S. Miller.
Daniel Hellstrom has helped in the conversion and implemented
the shutdowm functionality.
Marcel van Nies <morcles@gmail.com> has tested this on Sparc Station 20
Test status:
sun4c - not tested
sun4m,pci - not tested
sun4m,sbus - tested (Sparc Classic, Sparc Station 5, Sparc Station 20)
sun4d - not tested
leon - tested on various combinations of leon boards,
including SMP variants
generic
Introduce use of GENERIC_HARDIRQS and GENERIC_IRQ_SHOW
Allocate 64 IRQs - which is enough even for SS2000
Use a table of irq_bucket to maintain uses IRQs
irq_bucket is also used to chain several irq's that
must be called when the same intrrupt is asserted
Use irq_link to link a interrupt source to the irq
All plafforms must now supply their own build_device_irq method
handler_irq rewriten to use generic irq support
floppy
Read FLOPPY_IRQ from platform device
Use generic request_irq to register the floppy interrupt
Rewrote sparc_floppy_irq to use the generic irq support
pcic:
Introduce irq_chip
Store mask in chip_data for use in mask/unmask functions
Add build_device_irq for pcic
Use pcic_build_device_irq in pci_time_init
allocate virtual irqs in pcic_fill_irq
sun4c:
Introduce irq_chip
Store mask in chip_data for use in mask/unmask functions
Add build_device_irq for sun4c
Use sun4c_build_device_irq in sun4c_init_timers
sun4m:
Introduce irq_chip
Introduce dedicated mask/unmask methods
Introduce sun4m_handler_data that allow easy access to necessary
data in the mask/unmask functions
Add a helper method to enable profile_timer (used from smp)
Added sun4m_build_device_irq
Use sun4m_build_device_irq in sun4m_init_timers
TODO:
There is no replacement for smp_rotate that always scheduled
next CPU as interrupt target upon an interrupt
sun4d:
Introduce irq_chip
Introduce dedicated mask/unmask methods
Introduce sun4d_handler_data that allow easy access to
necessary data in mask/unmask fuctions
Rewrote sun4d_handler_irq to use generic irq support
TODO:
The original implmentation of enable/disable had:
if (irq < NR_IRQS)
return;
The new implmentation does not distingush between SBUS and cpu
interrupts.
I am no sure what is right here. I assume we need to do
something for the cpu interrupts.
I have not succeeded booting my sun4d box (with or without this patch)
and my understanding of this platfrom is limited.
So I would be a bit suprised if this works.
leon:
Introduce irq_chip
Store mask in chip_data for use in mask/unmask functions
Add build_device_irq for leon
Use leon_build_device_irq in leon_init_timers
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Daniel Hellstrom <daniel@gaisler.com>
Tested-by: Daniel Hellstrom <daniel@gaisler.com>
Tested-by: Marcel van Nies <morcles@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
83 lines
2.2 KiB
C
83 lines
2.2 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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/* cpu.c */
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extern const char *sparc_cpu_type;
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extern const char *sparc_pmu_type;
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extern const char *sparc_fpu_type;
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extern unsigned int fsr_storage;
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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 unsigned int lvl14_resolution;
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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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