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d666cd02 KC |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> | |
7 | * Copyright (C) 2014 Kevin Cernekee <cernekee@gmail.com> | |
8 | */ | |
9 | ||
10 | #include <linux/init.h> | |
11 | #include <linux/bootmem.h> | |
12 | #include <linux/clk-provider.h> | |
13 | #include <linux/ioport.h> | |
14 | #include <linux/of.h> | |
15 | #include <linux/of_fdt.h> | |
16 | #include <linux/of_platform.h> | |
17 | #include <linux/smp.h> | |
18 | #include <asm/addrspace.h> | |
19 | #include <asm/bmips.h> | |
20 | #include <asm/bootinfo.h> | |
21 | #include <asm/prom.h> | |
22 | #include <asm/smp-ops.h> | |
23 | #include <asm/time.h> | |
24 | ||
25 | void __init prom_init(void) | |
26 | { | |
27 | register_bmips_smp_ops(); | |
28 | } | |
29 | ||
30 | void __init prom_free_prom_memory(void) | |
31 | { | |
32 | } | |
33 | ||
34 | const char *get_system_type(void) | |
35 | { | |
36 | return "BCM3384"; | |
37 | } | |
38 | ||
39 | void __init plat_time_init(void) | |
40 | { | |
41 | struct device_node *np; | |
42 | u32 freq; | |
43 | ||
44 | np = of_find_node_by_name(NULL, "cpus"); | |
45 | if (!np) | |
46 | panic("missing 'cpus' DT node"); | |
47 | if (of_property_read_u32(np, "mips-hpt-frequency", &freq) < 0) | |
48 | panic("missing 'mips-hpt-frequency' property"); | |
49 | of_node_put(np); | |
50 | ||
51 | mips_hpt_frequency = freq; | |
52 | } | |
53 | ||
54 | void __init plat_mem_setup(void) | |
55 | { | |
56 | void *dtb = __dtb_start; | |
57 | ||
58 | set_io_port_base(0); | |
59 | ioport_resource.start = 0; | |
60 | ioport_resource.end = ~0; | |
61 | ||
62 | /* intended to somewhat resemble ARM; see Documentation/arm/Booting */ | |
63 | if (fw_arg0 == 0 && fw_arg1 == 0xffffffff) | |
64 | dtb = phys_to_virt(fw_arg2); | |
65 | ||
66 | __dt_setup_arch(dtb); | |
67 | ||
68 | strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE); | |
69 | } | |
70 | ||
71 | void __init device_tree_init(void) | |
72 | { | |
73 | struct device_node *np; | |
74 | ||
75 | unflatten_and_copy_device_tree(); | |
76 | ||
77 | /* Disable SMP boot unless both CPUs are listed in DT and !disabled */ | |
78 | np = of_find_node_by_name(NULL, "cpus"); | |
79 | if (np && of_get_available_child_count(np) <= 1) | |
80 | bmips_smp_enabled = 0; | |
81 | of_node_put(np); | |
82 | } | |
83 | ||
84 | int __init plat_of_setup(void) | |
85 | { | |
86 | return __dt_register_buses("brcm,bcm3384", "simple-bus"); | |
87 | } | |
88 | ||
89 | arch_initcall(plat_of_setup); | |
90 | ||
91 | static int __init plat_dev_init(void) | |
92 | { | |
93 | of_clk_init(NULL); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | device_initcall(plat_dev_init); |