init.c
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上传日期:2013-04-10
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文件大小:3k
- /*
- *
- * BRIEF MODULE DESCRIPTION
- * IT8172/QED5231 board setup.
- *
- * Copyright 2000 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ppopov@mvista.com or source@mvista.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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <linux/init.h>
- #include <linux/mm.h>
- #include <linux/sched.h>
- #include <linux/bootmem.h>
- #include <asm/addrspace.h>
- #include <asm/bootinfo.h>
- #include <linux/config.h>
- #include <linux/string.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <asm/it8172/it8172.h>
- #include <asm/it8172/it8172_dbg.h>
- int prom_argc;
- char **prom_argv, **prom_envp;
- extern char _end;
- extern void __init prom_init_cmdline(void);
- extern unsigned long __init prom_get_memsize(void);
- extern void __init it8172_init_ram_resource(unsigned long memsize);
- #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
- #define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
- const char *get_system_type(void)
- {
- return "ITE QED-4N-S01B";
- }
- int __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
- {
- unsigned long mem_size;
- unsigned long pcicr;
- prom_argc = argc;
- prom_argv = argv;
- prom_envp = envp;
- puts("ITE board running...");
- mips_machgroup = MACH_GROUP_ITE;
- mips_machtype = MACH_QED_4N_S01B; /* ITE board name/number */
- prom_init_cmdline();
- mem_size = prom_get_memsize();
- printk("Memory size: %dMBn", (unsigned)mem_size);
- mem_size <<= 20; /* MB */
- /*
- * make the entire physical memory visible to pci bus masters
- */
- IT_READ(IT_MC_PCICR, pcicr);
- pcicr &= ~0x1f;
- pcicr |= (mem_size - 1) >> 22;
- IT_WRITE(IT_MC_PCICR, pcicr);
- it8172_init_ram_resource(mem_size);
- add_memory_region(0, mem_size, BOOT_MEM_RAM);
- return 0;
- }