compat.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- /*
- * linux/arch/arm/kernel/compat.c
- *
- * Copyright (C) 2001 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * We keep the old params compatibility cruft in one place (here)
- * so we don't end up with lots of mess around other places.
- */
- #include <linux/config.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/init.h>
- #include <asm/setup.h>
- #include <asm/mach-types.h>
- #include <asm/page.h>
- #include <asm/mach/arch.h>
- static struct tag * __init memtag(struct tag *tag, unsigned long start, unsigned long size)
- {
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_MEM;
- tag->hdr.size = tag_size(tag_mem32);
- tag->u.mem.size = size;
- tag->u.mem.start = start;
- return tag;
- }
- static void __init build_tag_list(struct param_struct *params, void *taglist, int mem_init)
- {
- struct tag *tag = taglist;
- printk(KERN_DEBUG "Converting old-style param struct to taglistn");
- if (params->u1.s.page_size != PAGE_SIZE) {
- printk(KERN_WARNING "Warning: bad configuration page, "
- "trying to continuen");
- return;
- }
- tag->hdr.tag = ATAG_CORE;
- tag->hdr.size = tag_size(tag_core);
- tag->u.core.flags = params->u1.s.flags & FLAG_READONLY;
- tag->u.core.pagesize = params->u1.s.page_size;
- tag->u.core.rootdev = params->u1.s.rootdev;
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_RAMDISK;
- tag->hdr.size = tag_size(tag_ramdisk);
- tag->u.ramdisk.flags = (params->u1.s.flags & FLAG_RDLOAD ? 1 : 0) |
- (params->u1.s.flags & FLAG_RDPROMPT ? 2 : 0);
- tag->u.ramdisk.size = params->u1.s.ramdisk_size;
- tag->u.ramdisk.start = params->u1.s.rd_start;
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_INITRD;
- tag->hdr.size = tag_size(tag_initrd);
- tag->u.initrd.start = params->u1.s.initrd_start;
- tag->u.initrd.size = params->u1.s.initrd_size;
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_SERIAL;
- tag->hdr.size = tag_size(tag_serialnr);
- tag->u.serialnr.low = params->u1.s.system_serial_low;
- tag->u.serialnr.high = params->u1.s.system_serial_high;
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_REVISION;
- tag->hdr.size = tag_size(tag_revision);
- tag->u.revision.rev = params->u1.s.system_rev;
- if (mem_init) {
- #ifdef CONFIG_ARCH_ACORN
- if (machine_is_riscpc()) {
- int i;
- for (i = 0; i < 4; i++)
- tag = memtag(tag, PHYS_OFFSET + (i << 26),
- params->u1.s.pages_in_bank[i] * PAGE_SIZE);
- } else
- #endif
- tag = memtag(tag, PHYS_OFFSET, params->u1.s.nr_pages * PAGE_SIZE);
- }
- #ifdef CONFIG_FOOTBRIDGE
- if (params->u1.s.mem_fclk_21285) {
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_MEMCLK;
- tag->hdr.size = tag_size(tag_memclk);
- tag->u.memclk.fmemclk = params->u1.s.mem_fclk_21285;
- }
- #endif
- #ifdef CONFIG_ARCH_ACORN
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_ACORN;
- tag->hdr.size = tag_size(tag_acorn);
- tag->u.acorn.memc_control_reg = params->u1.s.memc_control_reg;
- tag->u.acorn.vram_pages = params->u1.s.pages_in_vram;
- tag->u.acorn.sounddefault = params->u1.s.sounddefault;
- tag->u.acorn.adfsdrives = params->u1.s.adfsdrives;
- #endif
- tag = tag_next(tag);
- tag->hdr.tag = ATAG_CMDLINE;
- tag->hdr.size = (strlen(params->commandline) + 3 +
- sizeof(struct tag_header)) >> 2;
- strcpy(tag->u.cmdline.cmdline, params->commandline);
- tag = tag_next(tag);
- tag->hdr.tag = 0;
- tag->hdr.size = 0;
- memmove(params, taglist, ((int)tag) - ((int)taglist) +
- sizeof(struct tag_header));
- }
- void __init convert_to_tag_list(struct param_struct *params, int mem_init)
- {
- build_tag_list(params, ¶ms->u2, mem_init);
- }