The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arch/score/kernel/setup.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
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    1 /*
    2  * arch/score/kernel/setup.c
    3  *
    4  * Score Processor version.
    5  *
    6  * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
    7  *  Chen Liqin <liqin.chen@sunplusct.com>
    8  *  Lennox Wu <lennox.wu@sunplusct.com>
    9  *
   10  * This program is free software; you can redistribute it and/or modify
   11  * it under the terms of the GNU General Public License as published by
   12  * the Free Software Foundation; either version 2 of the License, or
   13  * (at your option) any later version.
   14  *
   15  * This program is distributed in the hope that it will be useful,
   16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18  * GNU General Public License for more details.
   19  *
   20  * You should have received a copy of the GNU General Public License
   21  * along with this program; if not, see the file COPYING, or write
   22  * to the Free Software Foundation, Inc.,
   23  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   24  */
   25 
   26 #include <linux/bootmem.h>
   27 #include <linux/initrd.h>
   28 #include <linux/ioport.h>
   29 #include <linux/memblock.h>
   30 #include <linux/mm.h>
   31 #include <linux/seq_file.h>
   32 #include <linux/screen_info.h>
   33 
   34 #include <asm-generic/sections.h>
   35 #include <asm/setup.h>
   36 
   37 struct screen_info screen_info;
   38 unsigned long kernelsp;
   39 
   40 static char command_line[COMMAND_LINE_SIZE];
   41 static struct resource code_resource = { .name = "Kernel code",};
   42 static struct resource data_resource = { .name = "Kernel data",};
   43 
   44 static void __init bootmem_init(void)
   45 {
   46         unsigned long start_pfn, bootmap_size;
   47         unsigned long size = initrd_end - initrd_start;
   48 
   49         start_pfn = PFN_UP(__pa(&_end));
   50 
   51         min_low_pfn = PFN_UP(MEMORY_START);
   52         max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
   53         max_mapnr = max_low_pfn - min_low_pfn;
   54 
   55         /* Initialize the boot-time allocator with low memory only. */
   56         bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
   57                                          min_low_pfn, max_low_pfn);
   58         memblock_add_node(PFN_PHYS(min_low_pfn),
   59                           PFN_PHYS(max_low_pfn - min_low_pfn), 0);
   60 
   61         free_bootmem(PFN_PHYS(start_pfn),
   62                      (max_low_pfn - start_pfn) << PAGE_SHIFT);
   63         memory_present(0, start_pfn, max_low_pfn);
   64 
   65         /* Reserve space for the bootmem bitmap. */
   66         reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT);
   67 
   68         if (size == 0) {
   69                 printk(KERN_INFO "Initrd not found or empty");
   70                 goto disable;
   71         }
   72 
   73         if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
   74                 printk(KERN_ERR "Initrd extends beyond end of memory");
   75                 goto disable;
   76         }
   77 
   78         /* Reserve space for the initrd bitmap. */
   79         reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
   80         initrd_below_start_ok = 1;
   81 
   82         pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
   83                  initrd_start, size);
   84         return;
   85 disable:
   86         printk(KERN_CONT " - disabling initrd\n");
   87         initrd_start = 0;
   88         initrd_end = 0;
   89 }
   90 
   91 static void __init resource_init(void)
   92 {
   93         struct resource *res;
   94 
   95         code_resource.start = __pa(&_text);
   96         code_resource.end = __pa(&_etext) - 1;
   97         data_resource.start = __pa(&_etext);
   98         data_resource.end = __pa(&_edata) - 1;
   99 
  100         res = alloc_bootmem(sizeof(struct resource));
  101         res->name = "System RAM";
  102         res->start = MEMORY_START;
  103         res->end = MEMORY_START + MEMORY_SIZE - 1;
  104         res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
  105         request_resource(&iomem_resource, res);
  106 
  107         request_resource(res, &code_resource);
  108         request_resource(res, &data_resource);
  109 }
  110 
  111 void __init setup_arch(char **cmdline_p)
  112 {
  113         randomize_va_space = 0;
  114         *cmdline_p = command_line;
  115 
  116         cpu_cache_init();
  117         tlb_init();
  118         bootmem_init();
  119         paging_init();
  120         resource_init();
  121 }
  122 
  123 static int show_cpuinfo(struct seq_file *m, void *v)
  124 {
  125         unsigned long n = (unsigned long) v - 1;
  126 
  127         seq_printf(m, "processor\t\t: %ld\n", n);
  128         seq_printf(m, "\n");
  129 
  130         return 0;
  131 }
  132 
  133 static void *c_start(struct seq_file *m, loff_t *pos)
  134 {
  135         unsigned long i = *pos;
  136 
  137         return i < 1 ? (void *) (i + 1) : NULL;
  138 }
  139 
  140 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
  141 {
  142         ++*pos;
  143         return c_start(m, pos);
  144 }
  145 
  146 static void c_stop(struct seq_file *m, void *v)
  147 {
  148 }
  149 
  150 const struct seq_operations cpuinfo_op = {
  151         .start  = c_start,
  152         .next   = c_next,
  153         .stop   = c_stop,
  154         .show   = show_cpuinfo,
  155 };
  156 
  157 static int __init topology_init(void)
  158 {
  159         return 0;
  160 }
  161 
  162 subsys_initcall(topology_init);

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