95 строки
2.1 KiB
C
95 строки
2.1 KiB
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);
|
|
}
|