Contributors: 16
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Marc Zyngier |
257 |
45.57% |
5 |
20.00% |
| Robert Richter |
108 |
19.15% |
1 |
4.00% |
| Russell King |
38 |
6.74% |
4 |
16.00% |
| Aniruddha Banerjee |
36 |
6.38% |
1 |
4.00% |
| Liviu Dudau |
33 |
5.85% |
1 |
4.00% |
| Rabin Vincent |
32 |
5.67% |
1 |
4.00% |
| Srinivas Kandagatla |
17 |
3.01% |
1 |
4.00% |
| Jon Hunter |
11 |
1.95% |
2 |
8.00% |
| Ard Biesheuvel |
8 |
1.42% |
1 |
4.00% |
| Colin Cross |
7 |
1.24% |
1 |
4.00% |
| Feng Kan |
6 |
1.06% |
1 |
4.00% |
| Rob Herring |
3 |
0.53% |
2 |
8.00% |
| Ben Dooks |
3 |
0.53% |
1 |
4.00% |
| Thomas Gleixner |
2 |
0.35% |
1 |
4.00% |
| Linus Torvalds (pre-git) |
2 |
0.35% |
1 |
4.00% |
| Santosh Shilimkar |
1 |
0.18% |
1 |
4.00% |
| Total |
564 |
|
25 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2002 ARM Limited, All Rights Reserved.
*/
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqchip/arm-gic.h>
#include "irq-gic-common.h"
static DEFINE_RAW_SPINLOCK(irq_controller_lock);
void gic_enable_of_quirks(const struct device_node *np,
const struct gic_quirk *quirks, void *data)
{
for (; quirks->desc; quirks++) {
if (!of_device_is_compatible(np, quirks->compatible))
continue;
if (quirks->init(data))
pr_info("GIC: enabling workaround for %s\n",
quirks->desc);
}
}
void gic_enable_quirks(u32 iidr, const struct gic_quirk *quirks,
void *data)
{
for (; quirks->desc; quirks++) {
if (quirks->compatible)
continue;
if (quirks->iidr != (quirks->mask & iidr))
continue;
if (quirks->init(data))
pr_info("GIC: enabling workaround for %s\n",
quirks->desc);
}
}
int gic_configure_irq(unsigned int irq, unsigned int type,
void __iomem *base, void (*sync_access)(void))
{
u32 confmask = 0x2 << ((irq % 16) * 2);
u32 confoff = (irq / 16) * 4;
u32 val, oldval;
int ret = 0;
unsigned long flags;
/*
* Read current configuration register, and insert the config
* for "irq", depending on "type".
*/
raw_spin_lock_irqsave(&irq_controller_lock, flags);
val = oldval = readl_relaxed(base + confoff);
if (type & IRQ_TYPE_LEVEL_MASK)
val &= ~confmask;
else if (type & IRQ_TYPE_EDGE_BOTH)
val |= confmask;
/* If the current configuration is the same, then we are done */
if (val == oldval) {
raw_spin_unlock_irqrestore(&irq_controller_lock, flags);
return 0;
}
/*
* Write back the new configuration, and possibly re-enable
* the interrupt. If we fail to write a new configuration for
* an SPI then WARN and return an error. If we fail to write the
* configuration for a PPI this is most likely because the GIC
* does not allow us to set the configuration or we are in a
* non-secure mode, and hence it may not be catastrophic.
*/
writel_relaxed(val, base + confoff);
if (readl_relaxed(base + confoff) != val)
ret = -EINVAL;
raw_spin_unlock_irqrestore(&irq_controller_lock, flags);
if (sync_access)
sync_access();
return ret;
}
void gic_dist_config(void __iomem *base, int gic_irqs,
void (*sync_access)(void))
{
unsigned int i;
/*
* Set all global interrupts to be level triggered, active low.
*/
for (i = 32; i < gic_irqs; i += 16)
writel_relaxed(GICD_INT_ACTLOW_LVLTRIG,
base + GIC_DIST_CONFIG + i / 4);
/*
* Set priority on all global interrupts.
*/
for (i = 32; i < gic_irqs; i += 4)
writel_relaxed(GICD_INT_DEF_PRI_X4, base + GIC_DIST_PRI + i);
/*
* Deactivate and disable all SPIs. Leave the PPI and SGIs
* alone as they are in the redistributor registers on GICv3.
*/
for (i = 32; i < gic_irqs; i += 32) {
writel_relaxed(GICD_INT_EN_CLR_X32,
base + GIC_DIST_ACTIVE_CLEAR + i / 8);
writel_relaxed(GICD_INT_EN_CLR_X32,
base + GIC_DIST_ENABLE_CLEAR + i / 8);
}
if (sync_access)
sync_access();
}
void gic_cpu_config(void __iomem *base, int nr, void (*sync_access)(void))
{
int i;
/*
* Deal with the banked PPI and SGI interrupts - disable all
* private interrupts. Make sure everything is deactivated.
*/
for (i = 0; i < nr; i += 32) {
writel_relaxed(GICD_INT_EN_CLR_X32,
base + GIC_DIST_ACTIVE_CLEAR + i / 8);
writel_relaxed(GICD_INT_EN_CLR_X32,
base + GIC_DIST_ENABLE_CLEAR + i / 8);
}
/*
* Set priority on PPI and SGI interrupts
*/
for (i = 0; i < nr; i += 4)
writel_relaxed(GICD_INT_DEF_PRI_X4,
base + GIC_DIST_PRI + i * 4 / 4);
if (sync_access)
sync_access();
}