diff options
Diffstat (limited to 'arch/score/kernel/setup.c')
| -rw-r--r-- | arch/score/kernel/setup.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c new file mode 100644 index 000000000..b48459afe --- /dev/null +++ b/arch/score/kernel/setup.c @@ -0,0 +1,162 @@ +/* + * 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/memblock.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); + memblock_add_node(PFN_PHYS(min_low_pfn), + PFN_PHYS(max_low_pfn - min_low_pfn), 0); + + 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); |