arch/arm/kernel/devtree.c


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/*
 *  linux/arch/arm/kernel/devtree.c
 *
 *  Copyright (C) 2009 Canonical Ltd. <jeremy.kerr@canonical.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/bootmem.h>
#include <linux/memblock.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>

#include <asm/setup.h>
#include <asm/page.h>

void __init early_init_dt_add_memory_arch(u64 base, u64 size)
{
	arm_add_memory(base, size);
}

void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
{
	return alloc_bootmem_align(size, align);
}

/**
 * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq#
 *
 * Currently the mapping mechanism is trivial; simple flat hwirq numbers are
 * mapped 1:1 onto Linux irq numbers.  Cascaded irq controllers are not
 * supported.
 */
unsigned int irq_create_of_mapping(struct device_node *controller,
				   const u32 *intspec, unsigned int intsize)
{
	return intspec[0];
}
EXPORT_SYMBOL_GPL(irq_create_of_mapping);