diff options
Diffstat (limited to 'arch/arm/kernel/devtree.c')
-rw-r--r-- | arch/arm/kernel/devtree.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c new file mode 100644 index 000000000000..75e3df85b88c --- /dev/null +++ b/arch/arm/kernel/devtree.c | |||
@@ -0,0 +1,47 @@ | |||
1 | /* | ||
2 | * linux/arch/arm/kernel/devtree.c | ||
3 | * | ||
4 | * Copyright (C) 2009 Canonical Ltd. <jeremy.kerr@canonical.com> | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License version 2 as | ||
8 | * published by the Free Software Foundation. | ||
9 | */ | ||
10 | |||
11 | #include <linux/init.h> | ||
12 | #include <linux/module.h> | ||
13 | #include <linux/errno.h> | ||
14 | #include <linux/types.h> | ||
15 | #include <linux/bootmem.h> | ||
16 | #include <linux/memblock.h> | ||
17 | #include <linux/of.h> | ||
18 | #include <linux/of_fdt.h> | ||
19 | #include <linux/of_irq.h> | ||
20 | #include <linux/of_platform.h> | ||
21 | |||
22 | #include <asm/setup.h> | ||
23 | #include <asm/page.h> | ||
24 | |||
25 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) | ||
26 | { | ||
27 | arm_add_memory(base, size); | ||
28 | } | ||
29 | |||
30 | void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) | ||
31 | { | ||
32 | return alloc_bootmem_align(size, align); | ||
33 | } | ||
34 | |||
35 | /** | ||
36 | * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq# | ||
37 | * | ||
38 | * Currently the mapping mechanism is trivial; simple flat hwirq numbers are | ||
39 | * mapped 1:1 onto Linux irq numbers. Cascaded irq controllers are not | ||
40 | * supported. | ||
41 | */ | ||
42 | unsigned int irq_create_of_mapping(struct device_node *controller, | ||
43 | const u32 *intspec, unsigned int intsize) | ||
44 | { | ||
45 | return intspec[0]; | ||
46 | } | ||
47 | EXPORT_SYMBOL_GPL(irq_create_of_mapping); | ||