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ec9f9101 MS |
1 | /* |
2 | * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> | |
3 | * Copyright (C) 2007-2009 PetaLogix | |
4 | * Copyright (C) 2006 Atmark Techno, Inc. | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file "COPYING" in the main directory of this archive | |
8 | * for more details. | |
9 | */ | |
10 | ||
11 | #include <linux/init.h> | |
12 | #include <linux/string.h> | |
13 | #include <linux/seq_file.h> | |
14 | #include <linux/cpu.h> | |
15 | #include <linux/initrd.h> | |
16 | #include <linux/console.h> | |
17 | #include <linux/debugfs.h> | |
18 | ||
19 | #include <asm/setup.h> | |
20 | #include <asm/sections.h> | |
21 | #include <asm/page.h> | |
22 | #include <linux/io.h> | |
23 | #include <linux/bug.h> | |
24 | #include <linux/param.h> | |
733cc218 | 25 | #include <linux/pci.h> |
ec9f9101 | 26 | #include <linux/cache.h> |
ccfe27d7 MS |
27 | #include <linux/of_platform.h> |
28 | #include <linux/dma-mapping.h> | |
ec9f9101 MS |
29 | #include <asm/cacheflush.h> |
30 | #include <asm/entry.h> | |
31 | #include <asm/cpuinfo.h> | |
32 | ||
33 | #include <asm/system.h> | |
34 | #include <asm/prom.h> | |
35 | #include <asm/pgtable.h> | |
36 | ||
37 | DEFINE_PER_CPU(unsigned int, KSP); /* Saved kernel stack pointer */ | |
38 | DEFINE_PER_CPU(unsigned int, KM); /* Kernel/user mode */ | |
39 | DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */ | |
40 | DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */ | |
41 | DEFINE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */ | |
42 | ||
43 | unsigned int boot_cpuid; | |
44 | char cmd_line[COMMAND_LINE_SIZE]; | |
45 | ||
46 | void __init setup_arch(char **cmdline_p) | |
47 | { | |
ec9f9101 MS |
48 | *cmdline_p = cmd_line; |
49 | ||
50 | console_verbose(); | |
51 | ||
52 | unflatten_device_tree(); | |
53 | ||
54 | /* NOTE I think that this function is not necessary to call */ | |
55 | /* irq_early_init(); */ | |
56 | setup_cpuinfo(); | |
57 | ||
2ee2ff87 | 58 | microblaze_cache_init(); |
ec9f9101 | 59 | |
ec9f9101 MS |
60 | setup_memory(); |
61 | ||
733cc218 MS |
62 | xilinx_pci_init(); |
63 | ||
ec9f9101 MS |
64 | #if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER) |
65 | printk(KERN_NOTICE "Self modified code enable\n"); | |
66 | #endif | |
67 | ||
68 | #ifdef CONFIG_VT | |
69 | #if defined(CONFIG_XILINX_CONSOLE) | |
70 | conswitchp = &xil_con; | |
71 | #elif defined(CONFIG_DUMMY_CONSOLE) | |
72 | conswitchp = &dummy_con; | |
73 | #endif | |
74 | #endif | |
75 | } | |
76 | ||
77 | #ifdef CONFIG_MTD_UCLINUX | |
78 | /* Handle both romfs and cramfs types, without generating unnecessary | |
79 | code (ie no point checking for CRAMFS if it's not even enabled) */ | |
80 | inline unsigned get_romfs_len(unsigned *addr) | |
81 | { | |
82 | #ifdef CONFIG_ROMFS_FS | |
83 | if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */ | |
84 | return be32_to_cpu(addr[2]); | |
85 | #endif | |
86 | ||
87 | #ifdef CONFIG_CRAMFS | |
88 | if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */ | |
89 | return le32_to_cpu(addr[1]); | |
90 | #endif | |
91 | return 0; | |
92 | } | |
93 | #endif /* CONFIG_MTD_UCLINUX_EBSS */ | |
94 | ||
95 | void __init machine_early_init(const char *cmdline, unsigned int ram, | |
2622434e | 96 | unsigned int fdt, unsigned int msr) |
ec9f9101 MS |
97 | { |
98 | unsigned long *src, *dst = (unsigned long *)0x0; | |
99 | ||
cda1fd5a MS |
100 | /* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the |
101 | * end of kernel. There are two position which we want to check. | |
102 | * The first is __init_end and the second __bss_start. | |
103 | */ | |
104 | #ifdef CONFIG_MTD_UCLINUX | |
105 | int romfs_size; | |
106 | unsigned int romfs_base; | |
107 | char *old_klimit = klimit; | |
108 | ||
109 | romfs_base = (ram ? ram : (unsigned int)&__init_end); | |
110 | romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); | |
111 | if (!romfs_size) { | |
112 | romfs_base = (unsigned int)&__bss_start; | |
113 | romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); | |
114 | } | |
115 | ||
116 | /* Move ROMFS out of BSS before clearing it */ | |
117 | if (romfs_size > 0) { | |
118 | memmove(&_ebss, (int *)romfs_base, romfs_size); | |
119 | klimit += romfs_size; | |
120 | } | |
121 | #endif | |
122 | ||
ec9f9101 MS |
123 | /* clearing bss section */ |
124 | memset(__bss_start, 0, __bss_stop-__bss_start); | |
125 | memset(_ssbss, 0, _esbss-_ssbss); | |
126 | ||
1dff89a9 | 127 | /* Copy command line passed from bootloader */ |
ec9f9101 MS |
128 | #ifndef CONFIG_CMDLINE_BOOL |
129 | if (cmdline && cmdline[0] != '\0') | |
130 | strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE); | |
131 | #endif | |
132 | ||
bf2d8096 MS |
133 | lockdep_init(); |
134 | ||
ec9f9101 MS |
135 | /* initialize device tree for usage in early_printk */ |
136 | early_init_devtree((void *)_fdt_start); | |
137 | ||
138 | #ifdef CONFIG_EARLY_PRINTK | |
139 | setup_early_printk(NULL); | |
140 | #endif | |
141 | ||
6059b3cb | 142 | eprintk("Ramdisk addr 0x%08x, ", ram); |
74510f2a | 143 | if (fdt) |
6059b3cb | 144 | eprintk("FDT at 0x%08x\n", fdt); |
74510f2a | 145 | else |
6059b3cb | 146 | eprintk("Compiled-in FDT at 0x%08x\n", |
74510f2a | 147 | (unsigned int)_fdt_start); |
ec9f9101 MS |
148 | |
149 | #ifdef CONFIG_MTD_UCLINUX | |
6059b3cb | 150 | eprintk("Found romfs @ 0x%08x (0x%08x)\n", |
cda1fd5a | 151 | romfs_base, romfs_size); |
6059b3cb | 152 | eprintk("#### klimit %p ####\n", old_klimit); |
cda1fd5a MS |
153 | BUG_ON(romfs_size < 0); /* What else can we do? */ |
154 | ||
6059b3cb | 155 | eprintk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n", |
cda1fd5a MS |
156 | romfs_size, romfs_base, (unsigned)&_ebss); |
157 | ||
6059b3cb | 158 | eprintk("New klimit: 0x%08x\n", (unsigned)klimit); |
ec9f9101 MS |
159 | #endif |
160 | ||
2622434e MS |
161 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
162 | if (msr) | |
6059b3cb | 163 | eprintk("!!!Your kernel has setup MSR instruction but " |
0eb6aaf5 | 164 | "CPU don't have it %x\n", msr); |
2622434e MS |
165 | #else |
166 | if (!msr) | |
6059b3cb | 167 | eprintk("!!!Your kernel not setup MSR instruction but " |
0eb6aaf5 | 168 | "CPU have it %x\n", msr); |
2622434e MS |
169 | #endif |
170 | ||
ec9f9101 MS |
171 | for (src = __ivt_start; src < __ivt_end; src++, dst++) |
172 | *dst = *src; | |
173 | ||
174 | /* Initialize global data */ | |
175 | per_cpu(KM, 0) = 0x1; /* We start in kernel mode */ | |
176 | per_cpu(CURRENT_SAVE, 0) = (unsigned long)current; | |
177 | } | |
178 | ||
179 | #ifdef CONFIG_DEBUG_FS | |
180 | struct dentry *of_debugfs_root; | |
181 | ||
182 | static int microblaze_debugfs_init(void) | |
183 | { | |
184 | of_debugfs_root = debugfs_create_dir("microblaze", NULL); | |
185 | ||
186 | return of_debugfs_root == NULL; | |
187 | } | |
188 | arch_initcall(microblaze_debugfs_init); | |
189 | #endif | |
ccfe27d7 MS |
190 | |
191 | static int dflt_bus_notify(struct notifier_block *nb, | |
192 | unsigned long action, void *data) | |
193 | { | |
194 | struct device *dev = data; | |
195 | ||
196 | /* We are only intereted in device addition */ | |
197 | if (action != BUS_NOTIFY_ADD_DEVICE) | |
198 | return 0; | |
199 | ||
200 | set_dma_ops(dev, &dma_direct_ops); | |
201 | ||
202 | return NOTIFY_DONE; | |
203 | } | |
204 | ||
205 | static struct notifier_block dflt_plat_bus_notifier = { | |
206 | .notifier_call = dflt_bus_notify, | |
207 | .priority = INT_MAX, | |
208 | }; | |
209 | ||
ccfe27d7 MS |
210 | static int __init setup_bus_notifier(void) |
211 | { | |
212 | bus_register_notifier(&platform_bus_type, &dflt_plat_bus_notifier); | |
ccfe27d7 MS |
213 | |
214 | return 0; | |
215 | } | |
216 | ||
217 | arch_initcall(setup_bus_notifier); |