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: 5dc4c995db9eb45f6373a956eb1f69460e69e6d4 authored by Linus Torvalds on 15 January 2023, 15:22:43 UTC
Linux 6.2-rc4
Linux 6.2-rc4
Tip revision: 5dc4c99
integrator.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2000-2003 Deep Blue Solutions Ltd
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/memblock.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/amba/bus.h>
#include <linux/amba/serial.h>
#include <linux/io.h>
#include <linux/stat.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/pgtable.h>
#include <asm/mach-types.h>
#include <asm/mach/time.h>
#include "integrator-hardware.h"
#include "integrator-cm.h"
#include "integrator.h"
static DEFINE_RAW_SPINLOCK(cm_lock);
static void __iomem *cm_base;
/**
* cm_get - get the value from the CM_CTRL register
*/
u32 cm_get(void)
{
return readl(cm_base + INTEGRATOR_HDR_CTRL_OFFSET);
}
/**
* cm_control - update the CM_CTRL register.
* @mask: bits to change
* @set: bits to set
*/
void cm_control(u32 mask, u32 set)
{
unsigned long flags;
u32 val;
raw_spin_lock_irqsave(&cm_lock, flags);
val = readl(cm_base + INTEGRATOR_HDR_CTRL_OFFSET) & ~mask;
writel(val | set, cm_base + INTEGRATOR_HDR_CTRL_OFFSET);
raw_spin_unlock_irqrestore(&cm_lock, flags);
}
void cm_clear_irqs(void)
{
/* disable core module IRQs */
writel(0xffffffffU, cm_base + INTEGRATOR_HDR_IC_OFFSET +
IRQ_ENABLE_CLEAR);
}
static const struct of_device_id cm_match[] = {
{ .compatible = "arm,core-module-integrator"},
{ },
};
void cm_init(void)
{
struct device_node *cm = of_find_matching_node(NULL, cm_match);
if (!cm) {
pr_crit("no core module node found in device tree\n");
return;
}
cm_base = of_iomap(cm, 0);
if (!cm_base) {
pr_crit("could not remap core module\n");
return;
}
cm_clear_irqs();
}
/*
* We need to stop things allocating the low memory; ideally we need a
* better implementation of GFP_DMA which does not assume that DMA-able
* memory starts at zero.
*/
void __init integrator_reserve(void)
{
memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
}