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Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/kernel/setup.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/kernel/setup.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/kernel/setup.c b/target/linux/ubicom32/files/arch/ubicom32/kernel/setup.c new file mode 100644 index 000000000..7357f4ee3 --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/kernel/setup.c @@ -0,0 +1,194 @@ +/* + * arch/ubicom32/kernel/setup.c + * Ubicom32 architecture-dependent parts of system setup. + * + * (C) Copyright 2009, Ubicom, Inc. + * Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com) + * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org> + * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} + * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> + * Copyright (C) 1995 Hamish Macdonald + * Copyright (C) 2000 Lineo Inc. (www.lineo.com) + * Copyright (C) 2001 Lineo, Inc. <www.lineo.com> + * 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca> + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port 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. + * + * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/fb.h> +#include <linux/module.h> +#include <linux/console.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/bootmem.h> +#include <linux/seq_file.h> +#include <linux/init.h> + +#include <asm/devtree.h> +#include <asm/setup.h> +#include <asm/irq.h> +#include <asm/machdep.h> +#include <asm/pgtable.h> +#include <asm/pgalloc.h> +#include <asm/ubicom32-common.h> +#include <asm/processor.h> +#include <asm/bootargs.h> +#include <asm/thread.h> + +unsigned long memory_start; +EXPORT_SYMBOL(memory_start); + +unsigned long memory_end; +EXPORT_SYMBOL(memory_end); + +static char __initdata command_line[COMMAND_LINE_SIZE]; +#ifdef CONFIG_CMDLINE_BOOL +static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; +#endif + +extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end; + +/* + * setup_arch() + * Setup the architecture dependent portions of the system. + */ +void __init setup_arch(char **cmdline_p) +{ + int bootmap_size; + unsigned long ram_start; + + processor_init(); + bootargs_init(); + + /* + * Use the link for memory_start from the link and the processor + * node for memory_end. + */ + memory_start = PAGE_ALIGN(((unsigned long)&_end)); + processor_dram(&ram_start, &memory_end); + + init_mm.start_code = (unsigned long) &_stext; + init_mm.end_code = (unsigned long) &_etext; + init_mm.end_data = (unsigned long) &_edata; + init_mm.brk = (unsigned long) 0; + + /* + * bootexec copies the original default command line to end of memory. + * u-boot can modify it there (i.e. to enable network boot) and the + * kernel picks up the modified version. + * + * mainexec creates a `new default' command_line which is in the + * bootargs devnode. It is updated on every firmware update but + * not used at the moment. + */ + strlcpy(boot_command_line, (char *)(memory_end - COMMAND_LINE_SIZE), COMMAND_LINE_SIZE); + +#ifdef CONFIG_CMDLINE_BOOL +#ifdef CONFIG_CMDLINE_OVERRIDE + strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); +#else + if (builtin_cmdline[0]) { + /* append boot loader cmdline to builtin */ + strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE); + strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE); + strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); + } +#endif +#endif + + strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); + *cmdline_p = command_line; + + parse_early_param(); + + printk(KERN_INFO "%s Processor, Ubicom, Inc. <www.ubicom.com>\n", CPU); + +#if defined(DEBUG) + printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x " + "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext, + (int) &_sdata, (int) &_edata, + (int) &_sbss, (int) &_ebss); + printk(KERN_DEBUG "MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ", + (int) &_ebss, (int) memory_start, + (int) memory_start, (int) memory_end); +#endif + +#ifdef DEBUG + if (strlen(*cmdline_p)) + printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p); +#endif + +#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) + conswitchp = &dummy_con; +#endif + + /* + * If we have a device tree, see if we have the nodes we need. + */ + if (devtree) { + devtree_print(); + } + + /* + * From the arm initialization comment: + * + * This doesn't seem to be used by the Linux memory manager any + * more, but is used by ll_rw_block. If we can get rid of it, we + * also get rid of some of the stuff above as well. + * + * Note: max_low_pfn and max_pfn reflect the number of _pages_ in + * the system, not the maximum PFN. + */ + max_pfn = max_low_pfn = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT; + + /* + * Give all the memory to the bootmap allocator, tell it to put the + * boot mem_map at the start of memory. + */ + bootmap_size = init_bootmem_node( + NODE_DATA(0), + memory_start >> PAGE_SHIFT, /* map goes here */ + PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ + memory_end >> PAGE_SHIFT); + /* + * Free the usable memory, we have to make sure we do not free + * the bootmem bitmap so we then reserve it after freeing it :-) + */ + free_bootmem(memory_start, memory_end - memory_start); + reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); + + /* + * Get kmalloc into gear. + */ + paging_init(); + + /* + * Fix up the thread_info structure, indicate this is a mainline Linux + * thread and setup the sw_ksp(). + */ + sw_ksp[thread_get_self()] = (unsigned int) current_thread_info(); + thread_set_mainline(thread_get_self()); +} |