162 lines
4 KiB
C
162 lines
4 KiB
C
/*
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* arch/score/kernel/setup.c
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*
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* Score Processor version.
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*
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* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
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* Chen Liqin <liqin.chen@sunplusct.com>
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* Lennox Wu <lennox.wu@sunplusct.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/bootmem.h>
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#include <linux/initrd.h>
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#include <linux/ioport.h>
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#include <linux/memblock.h>
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#include <linux/mm.h>
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#include <linux/seq_file.h>
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#include <linux/screen_info.h>
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#include <asm-generic/sections.h>
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#include <asm/setup.h>
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struct screen_info screen_info;
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unsigned long kernelsp;
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static char command_line[COMMAND_LINE_SIZE];
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static struct resource code_resource = { .name = "Kernel code",};
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static struct resource data_resource = { .name = "Kernel data",};
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static void __init bootmem_init(void)
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{
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unsigned long start_pfn, bootmap_size;
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unsigned long size = initrd_end - initrd_start;
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start_pfn = PFN_UP(__pa(&_end));
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min_low_pfn = PFN_UP(MEMORY_START);
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max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
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max_mapnr = max_low_pfn - min_low_pfn;
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/* Initialize the boot-time allocator with low memory only. */
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bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
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min_low_pfn, max_low_pfn);
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memblock_add_node(PFN_PHYS(min_low_pfn),
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PFN_PHYS(max_low_pfn - min_low_pfn), 0);
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free_bootmem(PFN_PHYS(start_pfn),
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(max_low_pfn - start_pfn) << PAGE_SHIFT);
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memory_present(0, start_pfn, max_low_pfn);
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/* Reserve space for the bootmem bitmap. */
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reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT);
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if (size == 0) {
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printk(KERN_INFO "Initrd not found or empty");
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goto disable;
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}
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if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
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printk(KERN_ERR "Initrd extends beyond end of memory");
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goto disable;
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}
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/* Reserve space for the initrd bitmap. */
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reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
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initrd_below_start_ok = 1;
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pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
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initrd_start, size);
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return;
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disable:
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printk(KERN_CONT " - disabling initrd\n");
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initrd_start = 0;
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initrd_end = 0;
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}
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static void __init resource_init(void)
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{
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struct resource *res;
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code_resource.start = __pa(&_text);
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code_resource.end = __pa(&_etext) - 1;
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data_resource.start = __pa(&_etext);
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data_resource.end = __pa(&_edata) - 1;
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res = alloc_bootmem(sizeof(struct resource));
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res->name = "System RAM";
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res->start = MEMORY_START;
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res->end = MEMORY_START + MEMORY_SIZE - 1;
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res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
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request_resource(&iomem_resource, res);
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request_resource(res, &code_resource);
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request_resource(res, &data_resource);
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}
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void __init setup_arch(char **cmdline_p)
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{
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randomize_va_space = 0;
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*cmdline_p = command_line;
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cpu_cache_init();
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tlb_init();
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bootmem_init();
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paging_init();
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resource_init();
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}
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static int show_cpuinfo(struct seq_file *m, void *v)
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{
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unsigned long n = (unsigned long) v - 1;
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seq_printf(m, "processor\t\t: %ld\n", n);
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seq_printf(m, "\n");
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return 0;
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}
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static void *c_start(struct seq_file *m, loff_t *pos)
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{
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unsigned long i = *pos;
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return i < 1 ? (void *) (i + 1) : NULL;
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}
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static void *c_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void c_stop(struct seq_file *m, void *v)
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{
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}
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const struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo,
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};
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static int __init topology_init(void)
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{
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return 0;
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}
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subsys_initcall(topology_init);
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