https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 29594404d7fe73cd80eaa4ee8c43dcc53970c60e authored by Linus Torvalds on 11 December 2012, 03:30:57 UTC
Linux 3.7
Linux 3.7
Tip revision: 2959440
irq.c
/*
* s6000 irq crossbar
*
* Copyright (c) 2009 emlix GmbH
* Authors: Johannes Weiner <hannes@cmpxchg.org>
* Oskar Schirmer <oskar@scara.com>
*/
#include <linux/io.h>
#include <asm/irq.h>
#include <variant/hardware.h>
/* S6_REG_INTC */
#define INTC_STATUS 0x000
#define INTC_RAW 0x010
#define INTC_STATUS_AG 0x100
#define INTC_CFG(n) (0x200 + 4 * (n))
/*
* The s6000 has a crossbar that multiplexes interrupt output lines
* from the peripherals to input lines on the xtensa core.
*
* We leave the mapping decisions to the platform as it depends on the
* actually connected peripherals which distribution makes sense.
*/
extern const signed char *platform_irq_mappings[NR_IRQS];
static unsigned long scp_to_intc_enable[] = {
#define TO_INTC_ENABLE(n) (((n) << 1) + 1)
TO_INTC_ENABLE(0),
TO_INTC_ENABLE(1),
TO_INTC_ENABLE(2),
TO_INTC_ENABLE(3),
TO_INTC_ENABLE(4),
TO_INTC_ENABLE(5),
TO_INTC_ENABLE(6),
TO_INTC_ENABLE(7),
TO_INTC_ENABLE(8),
TO_INTC_ENABLE(9),
TO_INTC_ENABLE(10),
TO_INTC_ENABLE(11),
TO_INTC_ENABLE(12),
-1,
-1,
TO_INTC_ENABLE(13),
-1,
TO_INTC_ENABLE(14),
-1,
TO_INTC_ENABLE(15),
#undef TO_INTC_ENABLE
};
static void irq_set(unsigned int irq, int enable)
{
unsigned long en;
const signed char *m = platform_irq_mappings[irq];
if (!m)
return;
en = enable ? scp_to_intc_enable[irq] : 0;
while (*m >= 0) {
writel(en, S6_REG_INTC + INTC_CFG(*m));
m++;
}
}
void variant_irq_enable(unsigned int irq)
{
irq_set(irq, 1);
}
void variant_irq_disable(unsigned int irq)
{
irq_set(irq, 0);
}