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1/*
2 * MIPS support for CONFIG_OF device tree support
3 *
4 * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.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/initrd.h>
17#include <linux/debugfs.h>
18#include <linux/of.h>
19#include <linux/of_fdt.h>
20#include <linux/of_irq.h>
21#include <linux/of_platform.h>
22
23#include <asm/page.h>
24#include <asm/prom.h>
25
26int __init early_init_dt_scan_memory_arch(unsigned long node,
27 const char *uname, int depth,
28 void *data)
29{
30 return early_init_dt_scan_memory(node, uname, depth, data);
31}
32
33void __init early_init_dt_add_memory_arch(u64 base, u64 size)
34{
35 return add_memory_region(base, size, BOOT_MEM_RAM);
36}
37
38int __init reserve_mem_mach(unsigned long addr, unsigned long size)
39{
40 return reserve_bootmem(addr, size, BOOTMEM_DEFAULT);
41}
42
43void __init free_mem_mach(unsigned long addr, unsigned long size)
44{
45 return free_bootmem(addr, size);
46}
47
48void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
49{
50 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
51}
52
53#ifdef CONFIG_BLK_DEV_INITRD
54void __init early_init_dt_setup_initrd_arch(unsigned long start,
55 unsigned long end)
56{
57 initrd_start = (unsigned long)__va(start);
58 initrd_end = (unsigned long)__va(end);
59 initrd_below_start_ok = 1;
60}
61#endif
62
63/*
64 * irq_create_of_mapping - Hook to resolve OF irq specifier into a Linux irq#
65 *
66 * Currently the mapping mechanism is trivial; simple flat hwirq numbers are
67 * mapped 1:1 onto Linux irq numbers. Cascaded irq controllers are not
68 * supported.
69 */
70unsigned int irq_create_of_mapping(struct device_node *controller,
71 const u32 *intspec, unsigned int intsize)
72{
73 return intspec[0];
74}
75EXPORT_SYMBOL_GPL(irq_create_of_mapping);
76
77void __init early_init_devtree(void *params)
78{
79 /* Setup flat device-tree pointer */
80 initial_boot_params = params;
81
82 /* Retrieve various informations from the /chosen node of the
83 * device-tree, including the platform type, initrd location and
84 * size, and more ...
85 */
86 of_scan_flat_dt(early_init_dt_scan_chosen, arcs_cmdline);
87
88
89 /* Scan memory nodes */
90 of_scan_flat_dt(early_init_dt_scan_root, NULL);
91 of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL);
92}
93
94void __init device_tree_init(void)
95{
96 unsigned long base, size;
97
98 if (!initial_boot_params)
99 return;
100
101 base = virt_to_phys((void *)initial_boot_params);
102 size = be32_to_cpu(initial_boot_params->totalsize);
103
104 /* Before we do anything, lets reserve the dt blob */
105 reserve_mem_mach(base, size);
106
107 unflatten_device_tree();
108
109 /* free the space reserved for the dt blob */
110 free_mem_mach(base, size);
111}
1/*
2 * MIPS support for CONFIG_OF device tree support
3 *
4 * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.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/export.h>
13#include <linux/errno.h>
14#include <linux/types.h>
15#include <linux/bootmem.h>
16#include <linux/initrd.h>
17#include <linux/debugfs.h>
18#include <linux/of.h>
19#include <linux/of_fdt.h>
20#include <linux/of_irq.h>
21#include <linux/of_platform.h>
22
23#include <asm/page.h>
24#include <asm/prom.h>
25
26int __init early_init_dt_scan_memory_arch(unsigned long node,
27 const char *uname, int depth,
28 void *data)
29{
30 return early_init_dt_scan_memory(node, uname, depth, data);
31}
32
33void __init early_init_dt_add_memory_arch(u64 base, u64 size)
34{
35 return add_memory_region(base, size, BOOT_MEM_RAM);
36}
37
38int __init reserve_mem_mach(unsigned long addr, unsigned long size)
39{
40 return reserve_bootmem(addr, size, BOOTMEM_DEFAULT);
41}
42
43void __init free_mem_mach(unsigned long addr, unsigned long size)
44{
45 return free_bootmem(addr, size);
46}
47
48void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
49{
50 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
51}
52
53#ifdef CONFIG_BLK_DEV_INITRD
54void __init early_init_dt_setup_initrd_arch(unsigned long start,
55 unsigned long end)
56{
57 initrd_start = (unsigned long)__va(start);
58 initrd_end = (unsigned long)__va(end);
59 initrd_below_start_ok = 1;
60}
61#endif
62
63void __init early_init_devtree(void *params)
64{
65 /* Setup flat device-tree pointer */
66 initial_boot_params = params;
67
68 /* Retrieve various informations from the /chosen node of the
69 * device-tree, including the platform type, initrd location and
70 * size, and more ...
71 */
72 of_scan_flat_dt(early_init_dt_scan_chosen, arcs_cmdline);
73
74
75 /* Scan memory nodes */
76 of_scan_flat_dt(early_init_dt_scan_root, NULL);
77 of_scan_flat_dt(early_init_dt_scan_memory_arch, NULL);
78}
79
80void __init device_tree_init(void)
81{
82 unsigned long base, size;
83
84 if (!initial_boot_params)
85 return;
86
87 base = virt_to_phys((void *)initial_boot_params);
88 size = be32_to_cpu(initial_boot_params->totalsize);
89
90 /* Before we do anything, lets reserve the dt blob */
91 reserve_mem_mach(base, size);
92
93 unflatten_device_tree();
94
95 /* free the space reserved for the dt blob */
96 free_mem_mach(base, size);
97}
98
99void __init __dt_setup_arch(struct boot_param_header *bph)
100{
101 if (be32_to_cpu(bph->magic) != OF_DT_HEADER) {
102 pr_err("DTB has bad magic, ignoring builtin OF DTB\n");
103
104 return;
105 }
106
107 initial_boot_params = bph;
108
109 early_init_devtree(initial_boot_params);
110}