202b864ad5
Signed-off-by: Cui Bixiong <bixiong@sunnorth.com.cn> Signed-off-by: Chen Liqin <liqin.chen@sunplusct.com> modified: arch/score/include/asm/page.h modified: arch/score/kernel/setup.c modified: arch/score/mm/init.c
160 lines
4 KiB
C
160 lines
4 KiB
C
/*
|
|
* arch/score/kernel/setup.c
|
|
*
|
|
* Score Processor version.
|
|
*
|
|
* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
|
|
* Chen Liqin <liqin.chen@sunplusct.com>
|
|
* Lennox Wu <lennox.wu@sunplusct.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <linux/bootmem.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/screen_info.h>
|
|
|
|
#include <asm-generic/sections.h>
|
|
#include <asm/setup.h>
|
|
|
|
struct screen_info screen_info;
|
|
unsigned long kernelsp;
|
|
|
|
static char command_line[COMMAND_LINE_SIZE];
|
|
static struct resource code_resource = { .name = "Kernel code",};
|
|
static struct resource data_resource = { .name = "Kernel data",};
|
|
|
|
static void __init bootmem_init(void)
|
|
{
|
|
unsigned long start_pfn, bootmap_size;
|
|
unsigned long size = initrd_end - initrd_start;
|
|
|
|
start_pfn = PFN_UP(__pa(&_end));
|
|
|
|
min_low_pfn = PFN_UP(MEMORY_START);
|
|
max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
|
|
max_mapnr = max_low_pfn - min_low_pfn;
|
|
|
|
/* Initialize the boot-time allocator with low memory only. */
|
|
bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
|
|
min_low_pfn, max_low_pfn);
|
|
add_active_range(0, min_low_pfn, max_low_pfn);
|
|
|
|
free_bootmem(PFN_PHYS(start_pfn),
|
|
(max_low_pfn - start_pfn) << PAGE_SHIFT);
|
|
memory_present(0, start_pfn, max_low_pfn);
|
|
|
|
/* Reserve space for the bootmem bitmap. */
|
|
reserve_bootmem(PFN_PHYS(start_pfn), bootmap_size, BOOTMEM_DEFAULT);
|
|
|
|
if (size == 0) {
|
|
printk(KERN_INFO "Initrd not found or empty");
|
|
goto disable;
|
|
}
|
|
|
|
if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
|
|
printk(KERN_ERR "Initrd extends beyond end of memory");
|
|
goto disable;
|
|
}
|
|
|
|
/* Reserve space for the initrd bitmap. */
|
|
reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT);
|
|
initrd_below_start_ok = 1;
|
|
|
|
pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
|
|
initrd_start, size);
|
|
return;
|
|
disable:
|
|
printk(KERN_CONT " - disabling initrd\n");
|
|
initrd_start = 0;
|
|
initrd_end = 0;
|
|
}
|
|
|
|
static void __init resource_init(void)
|
|
{
|
|
struct resource *res;
|
|
|
|
code_resource.start = __pa(&_text);
|
|
code_resource.end = __pa(&_etext) - 1;
|
|
data_resource.start = __pa(&_etext);
|
|
data_resource.end = __pa(&_edata) - 1;
|
|
|
|
res = alloc_bootmem(sizeof(struct resource));
|
|
res->name = "System RAM";
|
|
res->start = MEMORY_START;
|
|
res->end = MEMORY_START + MEMORY_SIZE - 1;
|
|
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
|
|
request_resource(&iomem_resource, res);
|
|
|
|
request_resource(res, &code_resource);
|
|
request_resource(res, &data_resource);
|
|
}
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
randomize_va_space = 0;
|
|
*cmdline_p = command_line;
|
|
|
|
cpu_cache_init();
|
|
tlb_init();
|
|
bootmem_init();
|
|
paging_init();
|
|
resource_init();
|
|
}
|
|
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
unsigned long n = (unsigned long) v - 1;
|
|
|
|
seq_printf(m, "processor\t\t: %ld\n", n);
|
|
seq_printf(m, "\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
unsigned long i = *pos;
|
|
|
|
return i < 1 ? (void *) (i + 1) : NULL;
|
|
}
|
|
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return c_start(m, pos);
|
|
}
|
|
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
|
|
const struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|
|
static int __init topology_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(topology_init);
|