~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/mn10300/kernel/setup.c

Version: ~ [ linux-5.8 ] ~ [ linux-5.7.14 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.57 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.138 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.193 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.232 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.232 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* MN10300 Arch-specific initialisation
  2  *
  3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  4  * Written by David Howells (dhowells@redhat.com)
  5  *
  6  * This program is free software; you can redistribute it and/or
  7  * modify it under the terms of the GNU General Public Licence
  8  * as published by the Free Software Foundation; either version
  9  * 2 of the Licence, or (at your option) any later version.
 10  */
 11 #include <linux/errno.h>
 12 #include <linux/sched.h>
 13 #include <linux/kernel.h>
 14 #include <linux/mm.h>
 15 #include <linux/stddef.h>
 16 #include <linux/unistd.h>
 17 #include <linux/ptrace.h>
 18 #include <linux/user.h>
 19 #include <linux/tty.h>
 20 #include <linux/ioport.h>
 21 #include <linux/delay.h>
 22 #include <linux/init.h>
 23 #include <linux/bootmem.h>
 24 #include <linux/seq_file.h>
 25 #include <linux/cpu.h>
 26 #include <asm/processor.h>
 27 #include <linux/console.h>
 28 #include <asm/uaccess.h>
 29 #include <asm/setup.h>
 30 #include <asm/io.h>
 31 #include <asm/smp.h>
 32 #include <proc/proc.h>
 33 #include <asm/fpu.h>
 34 #include <asm/sections.h>
 35 
 36 struct mn10300_cpuinfo boot_cpu_data;
 37 
 38 static char __initdata cmd_line[COMMAND_LINE_SIZE];
 39 char redboot_command_line[COMMAND_LINE_SIZE] =
 40         "console=ttyS0,115200 root=/dev/mtdblock3 rw";
 41 
 42 char __initdata redboot_platform_name[COMMAND_LINE_SIZE];
 43 
 44 static struct resource code_resource = {
 45         .start  = 0x100000,
 46         .end    = 0,
 47         .name   = "Kernel code",
 48 };
 49 
 50 static struct resource data_resource = {
 51         .start  = 0,
 52         .end    = 0,
 53         .name   = "Kernel data",
 54 };
 55 
 56 static unsigned long __initdata phys_memory_base;
 57 static unsigned long __initdata phys_memory_end;
 58 static unsigned long __initdata memory_end;
 59 unsigned long memory_size;
 60 
 61 struct thread_info *__current_ti = &init_thread_union.thread_info;
 62 struct task_struct *__current = &init_task;
 63 
 64 #define mn10300_known_cpus 5
 65 static const char *const mn10300_cputypes[] = {
 66         "am33-1",
 67         "am33-2",
 68         "am34-1",
 69         "am33-3",
 70         "am34-2",
 71         "unknown"
 72 };
 73 
 74 /*
 75  * Pick out the memory size.  We look for mem=size,
 76  * where size is "size[KkMm]"
 77  */
 78 static int __init early_mem(char *p)
 79 {
 80         memory_size = memparse(p, &p);
 81 
 82         if (memory_size == 0)
 83                 panic("Memory size not known\n");
 84 
 85         return 0;
 86 }
 87 early_param("mem", early_mem);
 88 
 89 /*
 90  * architecture specific setup
 91  */
 92 void __init setup_arch(char **cmdline_p)
 93 {
 94         unsigned long bootmap_size;
 95         unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn;
 96 
 97         cpu_init();
 98         unit_setup();
 99         smp_init_cpus();
100 
101         /* save unparsed command line copy for /proc/cmdline */
102         strlcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);
103 
104         /* populate cmd_line too for later use, preserving boot_command_line */
105         strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
106         *cmdline_p = cmd_line;
107 
108         parse_early_param();
109 
110         memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS +
111                 memory_size;
112         if (memory_end > phys_memory_end)
113                 memory_end = phys_memory_end;
114 
115         init_mm.start_code = (unsigned long)&_text;
116         init_mm.end_code = (unsigned long) &_etext;
117         init_mm.end_data = (unsigned long) &_edata;
118         init_mm.brk = (unsigned long) &_end;
119 
120         code_resource.start = virt_to_bus(&_text);
121         code_resource.end = virt_to_bus(&_etext)-1;
122         data_resource.start = virt_to_bus(&_etext);
123         data_resource.end = virt_to_bus(&_edata)-1;
124 
125         start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT);
126         kstart_pfn = PFN_UP(__pa(&_text));
127         free_pfn = PFN_UP(__pa(&_end));
128         end_pfn = PFN_DOWN(__pa(memory_end));
129 
130         bootmap_size = init_bootmem_node(&contig_page_data,
131                                          free_pfn,
132                                          start_pfn,
133                                          end_pfn);
134 
135         if (kstart_pfn > start_pfn)
136                 free_bootmem(PFN_PHYS(start_pfn),
137                              PFN_PHYS(kstart_pfn - start_pfn));
138 
139         free_bootmem(PFN_PHYS(free_pfn),
140                      PFN_PHYS(end_pfn - free_pfn));
141 
142         /* If interrupt vector table is in main ram, then we need to
143            reserve the page it is occupying. */
144         if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS &&
145             CONFIG_INTERRUPT_VECTOR_BASE < memory_end)
146                 reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, PAGE_SIZE,
147                                 BOOTMEM_DEFAULT);
148 
149         reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size,
150                         BOOTMEM_DEFAULT);
151 
152 #ifdef CONFIG_VT
153 #if defined(CONFIG_VGA_CONSOLE)
154         conswitchp = &vga_con;
155 #elif defined(CONFIG_DUMMY_CONSOLE)
156         conswitchp = &dummy_con;
157 #endif
158 #endif
159 
160         paging_init();
161 }
162 
163 /*
164  * perform CPU initialisation
165  */
166 void __init cpu_init(void)
167 {
168         unsigned long cpurev = CPUREV, type;
169 
170         type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S;
171         if (type > mn10300_known_cpus)
172                 type = mn10300_known_cpus;
173 
174         printk(KERN_INFO "Panasonic %s, rev %ld\n",
175                mn10300_cputypes[type],
176                (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S);
177 
178         get_mem_info(&phys_memory_base, &memory_size);
179         phys_memory_end = phys_memory_base + memory_size;
180 
181         fpu_init_state();
182 }
183 
184 static struct cpu cpu_devices[NR_CPUS];
185 
186 static int __init topology_init(void)
187 {
188         int i;
189 
190         for_each_present_cpu(i)
191                 register_cpu(&cpu_devices[i], i);
192 
193         return 0;
194 }
195 
196 subsys_initcall(topology_init);
197 
198 /*
199  * Get CPU information for use by the procfs.
200  */
201 static int show_cpuinfo(struct seq_file *m, void *v)
202 {
203 #ifdef CONFIG_SMP
204         struct mn10300_cpuinfo *c = v;
205         unsigned long cpu_id = c - cpu_data;
206         unsigned long cpurev = c->type, type, icachesz, dcachesz;
207 #else  /* CONFIG_SMP */
208         unsigned long cpu_id = 0;
209         unsigned long cpurev = CPUREV, type, icachesz, dcachesz;
210 #endif /* CONFIG_SMP */
211 
212 #ifdef CONFIG_SMP
213         if (!cpu_online(cpu_id))
214                 return 0;
215 #endif
216 
217         type = (cpurev & CPUREV_TYPE) >> CPUREV_TYPE_S;
218         if (type > mn10300_known_cpus)
219                 type = mn10300_known_cpus;
220 
221         icachesz =
222                 ((cpurev & CPUREV_ICWAY ) >> CPUREV_ICWAY_S)  *
223                 ((cpurev & CPUREV_ICSIZE) >> CPUREV_ICSIZE_S) *
224                 1024;
225 
226         dcachesz =
227                 ((cpurev & CPUREV_DCWAY ) >> CPUREV_DCWAY_S)  *
228                 ((cpurev & CPUREV_DCSIZE) >> CPUREV_DCSIZE_S) *
229                 1024;
230 
231         seq_printf(m,
232                    "processor  : %ld\n"
233                    "vendor_id  : " PROCESSOR_VENDOR_NAME "\n"
234                    "cpu core   : %s\n"
235                    "cpu rev    : %lu\n"
236                    "model name : " PROCESSOR_MODEL_NAME         "\n"
237                    "icache size: %lu\n"
238                    "dcache size: %lu\n",
239                    cpu_id,
240                    mn10300_cputypes[type],
241                    (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S,
242                    icachesz,
243                    dcachesz
244                    );
245 
246         seq_printf(m,
247                    "ioclk speed: %lu.%02luMHz\n"
248                    "bogomips   : %lu.%02lu\n\n",
249                    MN10300_IOCLK / 1000000,
250                    (MN10300_IOCLK / 10000) % 100,
251 #ifdef CONFIG_SMP
252                    c->loops_per_jiffy / (500000 / HZ),
253                    (c->loops_per_jiffy / (5000 / HZ)) % 100
254 #else  /* CONFIG_SMP */
255                    loops_per_jiffy / (500000 / HZ),
256                    (loops_per_jiffy / (5000 / HZ)) % 100
257 #endif /* CONFIG_SMP */
258                    );
259 
260         return 0;
261 }
262 
263 static void *c_start(struct seq_file *m, loff_t *pos)
264 {
265         return *pos < NR_CPUS ? cpu_data + *pos : NULL;
266 }
267 
268 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
269 {
270         ++*pos;
271         return c_start(m, pos);
272 }
273 
274 static void c_stop(struct seq_file *m, void *v)
275 {
276 }
277 
278 const struct seq_operations cpuinfo_op = {
279         .start  = c_start,
280         .next   = c_next,
281         .stop   = c_stop,
282         .show   = show_cpuinfo,
283 };
284 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp