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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 | 97 | { |
0b9b0200 MS |
98 | unsigned long *src, *dst; |
99 | unsigned int offset = 0; | |
ec9f9101 | 100 | |
cda1fd5a MS |
101 | /* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the |
102 | * end of kernel. There are two position which we want to check. | |
103 | * The first is __init_end and the second __bss_start. | |
104 | */ | |
105 | #ifdef CONFIG_MTD_UCLINUX | |
106 | int romfs_size; | |
107 | unsigned int romfs_base; | |
108 | char *old_klimit = klimit; | |
109 | ||
110 | romfs_base = (ram ? ram : (unsigned int)&__init_end); | |
111 | romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); | |
112 | if (!romfs_size) { | |
113 | romfs_base = (unsigned int)&__bss_start; | |
114 | romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base)); | |
115 | } | |
116 | ||
117 | /* Move ROMFS out of BSS before clearing it */ | |
118 | if (romfs_size > 0) { | |
119 | memmove(&_ebss, (int *)romfs_base, romfs_size); | |
120 | klimit += romfs_size; | |
121 | } | |
122 | #endif | |
123 | ||
ec9f9101 MS |
124 | /* clearing bss section */ |
125 | memset(__bss_start, 0, __bss_stop-__bss_start); | |
126 | memset(_ssbss, 0, _esbss-_ssbss); | |
127 | ||
1dff89a9 | 128 | /* Copy command line passed from bootloader */ |
ec9f9101 MS |
129 | #ifndef CONFIG_CMDLINE_BOOL |
130 | if (cmdline && cmdline[0] != '\0') | |
131 | strlcpy(cmd_line, cmdline, COMMAND_LINE_SIZE); | |
132 | #endif | |
133 | ||
bf2d8096 MS |
134 | lockdep_init(); |
135 | ||
ec9f9101 MS |
136 | /* initialize device tree for usage in early_printk */ |
137 | early_init_devtree((void *)_fdt_start); | |
138 | ||
139 | #ifdef CONFIG_EARLY_PRINTK | |
140 | setup_early_printk(NULL); | |
141 | #endif | |
142 | ||
6059b3cb | 143 | eprintk("Ramdisk addr 0x%08x, ", ram); |
74510f2a | 144 | if (fdt) |
6059b3cb | 145 | eprintk("FDT at 0x%08x\n", fdt); |
74510f2a | 146 | else |
6059b3cb | 147 | eprintk("Compiled-in FDT at 0x%08x\n", |
74510f2a | 148 | (unsigned int)_fdt_start); |
ec9f9101 MS |
149 | |
150 | #ifdef CONFIG_MTD_UCLINUX | |
6059b3cb | 151 | eprintk("Found romfs @ 0x%08x (0x%08x)\n", |
cda1fd5a | 152 | romfs_base, romfs_size); |
6059b3cb | 153 | eprintk("#### klimit %p ####\n", old_klimit); |
cda1fd5a MS |
154 | BUG_ON(romfs_size < 0); /* What else can we do? */ |
155 | ||
6059b3cb | 156 | eprintk("Moved 0x%08x bytes from 0x%08x to 0x%08x\n", |
cda1fd5a MS |
157 | romfs_size, romfs_base, (unsigned)&_ebss); |
158 | ||
6059b3cb | 159 | eprintk("New klimit: 0x%08x\n", (unsigned)klimit); |
ec9f9101 MS |
160 | #endif |
161 | ||
2622434e MS |
162 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR |
163 | if (msr) | |
6059b3cb | 164 | eprintk("!!!Your kernel has setup MSR instruction but " |
0eb6aaf5 | 165 | "CPU don't have it %x\n", msr); |
2622434e MS |
166 | #else |
167 | if (!msr) | |
6059b3cb | 168 | eprintk("!!!Your kernel not setup MSR instruction but " |
0eb6aaf5 | 169 | "CPU have it %x\n", msr); |
2622434e MS |
170 | #endif |
171 | ||
0b9b0200 MS |
172 | /* Do not copy reset vectors. offset = 0x2 means skip the first |
173 | * two instructions. dst is pointer to MB vectors which are placed | |
174 | * in block ram. If you want to copy reset vector setup offset to 0x0 */ | |
175 | #if !CONFIG_MANUAL_RESET_VECTOR | |
176 | offset = 0x2; | |
177 | #endif | |
178 | dst = (unsigned long *) (offset * sizeof(u32)); | |
179 | for (src = __ivt_start + offset; src < __ivt_end; src++, dst++) | |
ec9f9101 MS |
180 | *dst = *src; |
181 | ||
182 | /* Initialize global data */ | |
183 | per_cpu(KM, 0) = 0x1; /* We start in kernel mode */ | |
184 | per_cpu(CURRENT_SAVE, 0) = (unsigned long)current; | |
185 | } | |
186 | ||
187 | #ifdef CONFIG_DEBUG_FS | |
188 | struct dentry *of_debugfs_root; | |
189 | ||
190 | static int microblaze_debugfs_init(void) | |
191 | { | |
192 | of_debugfs_root = debugfs_create_dir("microblaze", NULL); | |
193 | ||
194 | return of_debugfs_root == NULL; | |
195 | } | |
196 | arch_initcall(microblaze_debugfs_init); | |
197 | #endif | |
ccfe27d7 MS |
198 | |
199 | static int dflt_bus_notify(struct notifier_block *nb, | |
200 | unsigned long action, void *data) | |
201 | { | |
202 | struct device *dev = data; | |
203 | ||
204 | /* We are only intereted in device addition */ | |
205 | if (action != BUS_NOTIFY_ADD_DEVICE) | |
206 | return 0; | |
207 | ||
208 | set_dma_ops(dev, &dma_direct_ops); | |
209 | ||
210 | return NOTIFY_DONE; | |
211 | } | |
212 | ||
213 | static struct notifier_block dflt_plat_bus_notifier = { | |
214 | .notifier_call = dflt_bus_notify, | |
215 | .priority = INT_MAX, | |
216 | }; | |
217 | ||
ccfe27d7 MS |
218 | static int __init setup_bus_notifier(void) |
219 | { | |
220 | bus_register_notifier(&platform_bus_type, &dflt_plat_bus_notifier); | |
ccfe27d7 MS |
221 | |
222 | return 0; | |
223 | } | |
224 | ||
225 | arch_initcall(setup_bus_notifier); |