Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux/fpc-iii.git] / arch / mips / lantiq / prom.c
blob19686c5bc5ed03686ef2a2791b7e360fdd68484d
1 /*
2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
6 * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
7 */
9 #include <linux/export.h>
10 #include <linux/clk.h>
11 #include <linux/bootmem.h>
12 #include <linux/of_platform.h>
13 #include <linux/of_fdt.h>
15 #include <asm/bootinfo.h>
16 #include <asm/time.h>
17 #include <asm/prom.h>
19 #include <lantiq.h>
21 #include "prom.h"
22 #include "clk.h"
24 /* access to the ebu needs to be locked between different drivers */
25 DEFINE_SPINLOCK(ebu_lock);
26 EXPORT_SYMBOL_GPL(ebu_lock);
29 * this struct is filled by the soc specific detection code and holds
30 * information about the specific soc type, revision and name
32 static struct ltq_soc_info soc_info;
34 const char *get_system_type(void)
36 return soc_info.sys_type;
39 void prom_free_prom_memory(void)
43 static void __init prom_init_cmdline(void)
45 int argc = fw_arg0;
46 char **argv = (char **) KSEG1ADDR(fw_arg1);
47 int i;
49 arcs_cmdline[0] = '\0';
51 for (i = 0; i < argc; i++) {
52 char *p = (char *) KSEG1ADDR(argv[i]);
54 if (CPHYSADDR(p) && *p) {
55 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
56 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
61 void __init plat_mem_setup(void)
63 ioport_resource.start = IOPORT_RESOURCE_START;
64 ioport_resource.end = IOPORT_RESOURCE_END;
65 iomem_resource.start = IOMEM_RESOURCE_START;
66 iomem_resource.end = IOMEM_RESOURCE_END;
68 set_io_port_base((unsigned long) KSEG1);
71 * Load the builtin devicetree. This causes the chosen node to be
72 * parsed resulting in our memory appearing
74 __dt_setup_arch(&__dtb_start);
77 void __init device_tree_init(void)
79 unsigned long base, size;
81 if (!initial_boot_params)
82 return;
84 base = virt_to_phys((void *)initial_boot_params);
85 size = be32_to_cpu(initial_boot_params->totalsize);
87 /* Before we do anything, lets reserve the dt blob */
88 reserve_bootmem(base, size, BOOTMEM_DEFAULT);
90 unflatten_device_tree();
93 void __init prom_init(void)
95 /* call the soc specific detetcion code and get it to fill soc_info */
96 ltq_soc_detect(&soc_info);
97 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
98 soc_info.name, soc_info.rev_type);
99 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
100 pr_info("SoC: %s\n", soc_info.sys_type);
101 prom_init_cmdline();
103 #if defined(CONFIG_MIPS_MT_SMP)
104 if (register_vsmp_smp_ops())
105 panic("failed to register_vsmp_smp_ops()");
106 #endif
109 int __init plat_of_setup(void)
111 static struct of_device_id of_ids[3];
113 if (!of_have_populated_dt())
114 panic("device tree not present");
116 strlcpy(of_ids[0].compatible, soc_info.compatible,
117 sizeof(of_ids[0].compatible));
118 strncpy(of_ids[1].compatible, "simple-bus",
119 sizeof(of_ids[1].compatible));
120 return of_platform_populate(NULL, of_ids, NULL, NULL);
123 arch_initcall(plat_of_setup);