mirror of
https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
synced 2024-10-09 05:03:07 +00:00
0ebfff1491
This adds the new irq remapper core and removes the old one. Because there are some fundamental conflicts with the old code, like the value of NO_IRQ which I'm now setting to 0 (as per discussions with Linus), etc..., this commit also changes the relevant platform and driver code over to use the new remapper (so as not to cause difficulties later in bisecting). This patch removes the old pre-parsing of the open firmware interrupt tree along with all the bogus assumptions it made to try to renumber interrupts according to the platform. This is all to be handled by the new code now. For the pSeries XICS interrupt controller, a single remapper host is created for the whole machine regardless of how many interrupt presentation and source controllers are found, and it's set to match any device node that isn't a 8259. That works fine on pSeries and avoids having to deal with some of the complexities of split source controllers vs. presentation controllers in the pSeries device trees. The powerpc i8259 PIC driver now always requests the legacy interrupt range. It also has the feature of being able to match any device node (including NULL) if passed no device node as an input. That will help porting over platforms with broken device-trees like Pegasos who don't have a proper interrupt tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
37 lines
1 KiB
C
37 lines
1 KiB
C
/*
|
|
* arch/powerpc/platforms/pseries/xics.h
|
|
*
|
|
* Copyright 2000 IBM Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _POWERPC_KERNEL_XICS_H
|
|
#define _POWERPC_KERNEL_XICS_H
|
|
|
|
#include <linux/cache.h>
|
|
|
|
extern void xics_init_IRQ(void);
|
|
extern void xics_setup_cpu(void);
|
|
extern void xics_teardown_cpu(int secondary);
|
|
extern void xics_cause_IPI(int cpu);
|
|
extern void xics_request_IPIs(void);
|
|
extern void xics_migrate_irqs_away(void);
|
|
|
|
/* first argument is ignored for now*/
|
|
void pSeriesLP_cppr_info(int n_cpu, u8 value);
|
|
|
|
struct xics_ipi_struct {
|
|
volatile unsigned long value;
|
|
} ____cacheline_aligned;
|
|
|
|
extern struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned;
|
|
|
|
struct irq_desc;
|
|
extern void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc,
|
|
struct pt_regs *regs);
|
|
|
|
#endif /* _POWERPC_KERNEL_XICS_H */
|