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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>
25#include <linux/pci.h>
26#include <linux/cache.h>
27#include <linux/of_platform.h>
28#include <linux/dma-mapping.h>
29#include <asm/cacheflush.h>
30#include <asm/entry.h>
31#include <asm/cpuinfo.h>
32
33#include <asm/prom.h>
34#include <asm/pgtable.h>
35
36DEFINE_PER_CPU(unsigned int, KSP);
37DEFINE_PER_CPU(unsigned int, KM);
38DEFINE_PER_CPU(unsigned int, ENTRY_SP);
39DEFINE_PER_CPU(unsigned int, R11_SAVE);
40DEFINE_PER_CPU(unsigned int, CURRENT_SAVE);
41
42unsigned int boot_cpuid;
43
44
45
46
47
48char cmd_line[COMMAND_LINE_SIZE] __attribute__ ((section(".data")));
49
50void __init setup_arch(char **cmdline_p)
51{
52 *cmdline_p = cmd_line;
53
54 console_verbose();
55
56 unflatten_device_tree();
57
58 setup_cpuinfo();
59
60 microblaze_cache_init();
61
62 setup_memory();
63
64#ifdef CONFIG_EARLY_PRINTK
65
66 remap_early_printk();
67#endif
68
69 xilinx_pci_init();
70
71#if defined(CONFIG_SELFMOD_INTC) || defined(CONFIG_SELFMOD_TIMER)
72 pr_notice("Self modified code enable\n");
73#endif
74
75#ifdef CONFIG_VT
76#if defined(CONFIG_XILINX_CONSOLE)
77 conswitchp = &xil_con;
78#elif defined(CONFIG_DUMMY_CONSOLE)
79 conswitchp = &dummy_con;
80#endif
81#endif
82}
83
84#ifdef CONFIG_MTD_UCLINUX
85
86
87inline unsigned get_romfs_len(unsigned *addr)
88{
89#ifdef CONFIG_ROMFS_FS
90 if (memcmp(&addr[0], "-rom1fs-", 8) == 0)
91 return be32_to_cpu(addr[2]);
92#endif
93
94#ifdef CONFIG_CRAMFS
95 if (addr[0] == le32_to_cpu(0x28cd3d45))
96 return le32_to_cpu(addr[1]);
97#endif
98 return 0;
99}
100#endif
101
102unsigned long kernel_tlb;
103
104void __init machine_early_init(const char *cmdline, unsigned int ram,
105 unsigned int fdt, unsigned int msr, unsigned int tlb0,
106 unsigned int tlb1)
107{
108 unsigned long *src, *dst;
109 unsigned int offset = 0;
110
111
112
113
114
115#ifdef CONFIG_MTD_UCLINUX
116 int romfs_size;
117 unsigned int romfs_base;
118 char *old_klimit = klimit;
119
120 romfs_base = (ram ? ram : (unsigned int)&__init_end);
121 romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
122 if (!romfs_size) {
123 romfs_base = (unsigned int)&__bss_start;
124 romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
125 }
126
127
128 if (romfs_size > 0) {
129 memmove(&__bss_stop, (int *)romfs_base, romfs_size);
130 klimit += romfs_size;
131 }
132#endif
133
134
135 memset(__bss_start, 0, __bss_stop-__bss_start);
136 memset(_ssbss, 0, _esbss-_ssbss);
137
138 lockdep_init();
139
140
141 early_init_devtree((void *)_fdt_start);
142
143#ifdef CONFIG_EARLY_PRINTK
144 setup_early_printk(NULL);
145#endif
146
147
148
149 kernel_tlb = tlb0 + tlb1;
150
151
152
153 pr_info("Ramdisk addr 0x%08x, ", ram);
154 if (fdt)
155 pr_info("FDT at 0x%08x\n", fdt);
156 else
157 pr_info("Compiled-in FDT at 0x%08x\n",
158 (unsigned int)_fdt_start);
159
160#ifdef CONFIG_MTD_UCLINUX
161 pr_info("Found romfs @ 0x%08x (0x%08x)\n",
162 romfs_base, romfs_size);
163 pr_info("#### klimit %p ####\n", old_klimit);
164 BUG_ON(romfs_size < 0);
165
166 pr_info("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",
167 romfs_size, romfs_base, (unsigned)&__bss_stop);
168
169 pr_info("New klimit: 0x%08x\n", (unsigned)klimit);
170#endif
171
172#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
173 if (msr) {
174 pr_info("!!!Your kernel has setup MSR instruction but ");
175 pr_cont("CPU don't have it %x\n", msr);
176 }
177#else
178 if (!msr) {
179 pr_info("!!!Your kernel not setup MSR instruction but ");
180 pr_cont"CPU have it %x\n", msr);
181 }
182#endif
183
184
185
186
187#if !CONFIG_MANUAL_RESET_VECTOR
188 offset = 0x2;
189#endif
190 dst = (unsigned long *) (offset * sizeof(u32));
191 for (src = __ivt_start + offset; src < __ivt_end; src++, dst++)
192 *dst = *src;
193
194
195 per_cpu(KM, 0) = 0x1;
196 per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;
197}
198
199#ifdef CONFIG_DEBUG_FS
200struct dentry *of_debugfs_root;
201
202static int microblaze_debugfs_init(void)
203{
204 of_debugfs_root = debugfs_create_dir("microblaze", NULL);
205
206 return of_debugfs_root == NULL;
207}
208arch_initcall(microblaze_debugfs_init);
209
210# ifdef CONFIG_MMU
211static int __init debugfs_tlb(void)
212{
213 struct dentry *d;
214
215 if (!of_debugfs_root)
216 return -ENODEV;
217
218 d = debugfs_create_u32("tlb_skip", S_IRUGO, of_debugfs_root, &tlb_skip);
219 if (!d)
220 return -ENOMEM;
221
222 return 0;
223}
224device_initcall(debugfs_tlb);
225# endif
226#endif
227
228static int dflt_bus_notify(struct notifier_block *nb,
229 unsigned long action, void *data)
230{
231 struct device *dev = data;
232
233
234 if (action != BUS_NOTIFY_ADD_DEVICE)
235 return 0;
236
237 set_dma_ops(dev, &dma_direct_ops);
238
239 return NOTIFY_DONE;
240}
241
242static struct notifier_block dflt_plat_bus_notifier = {
243 .notifier_call = dflt_bus_notify,
244 .priority = INT_MAX,
245};
246
247static int __init setup_bus_notifier(void)
248{
249 bus_register_notifier(&platform_bus_type, &dflt_plat_bus_notifier);
250
251 return 0;
252}
253
254arch_initcall(setup_bus_notifier);
255