mirror of
https://github.com/torvalds/linux.git
synced 2024-11-19 02:21:47 +00:00
9eb8f6743b
Add some basic empty infrastructure for DT support on ARM.
v5: - Fix off-by-one error in size calculation of initrd
- Stop mucking with cmd_line, and load command line from dt into
boot_command_line instead which matches the behaviour of ATAGS booting
v3: - moved cmd_line export and initrd setup to this patch to make the
series bisectable.
- switched to alloc_bootmem_align() for allocation when
unflattening the device tree. memblock_alloc() was not the
right interface.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/*
|
|
* 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);
|