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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | /* * linux/arch/arm26/kernel/compat.c * * Copyright (C) 2001 Russell King * 2003 Ian Molton * * 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. * * NOTE: * The old struct param_struct is deprecated, but it will be kept in * the kernel for 5 years from now (2001). This will allow boot loaders * to convert to the new struct tag way. */ #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/arch.h> //#include <asm/mach/irq.h> /* * Usage: * - do not go blindly adding fields, add them at the end * - when adding fields, don't rely on the address until * a patch from me has been released * - unused fields should be zero (for future expansion) * - this structure is relatively short-lived - only * guaranteed to contain useful data in setup_arch() * * This is the old deprecated way to pass parameters to the kernel */ struct param_struct { union { struct { unsigned long page_size; /* 0 */ unsigned long nr_pages; /* 4 */ unsigned long ramdisk_size; /* 8 */ unsigned long flags; /* 12 */ #define FLAG_READONLY 1 #define FLAG_RDLOAD 4 #define FLAG_RDPROMPT 8 unsigned long rootdev; /* 16 */ unsigned long video_num_cols; /* 20 */ unsigned long video_num_rows; /* 24 */ unsigned long video_x; /* 28 */ unsigned long video_y; /* 32 */ unsigned long memc_control_reg; /* 36 */ unsigned char sounddefault; /* 40 */ unsigned char adfsdrives; /* 41 */ unsigned char bytes_per_char_h; /* 42 */ unsigned char bytes_per_char_v; /* 43 */ unsigned long pages_in_bank[4]; /* 44 */ unsigned long pages_in_vram; /* 60 */ unsigned long initrd_start; /* 64 */ unsigned long initrd_size; /* 68 */ unsigned long rd_start; /* 72 */ unsigned long system_rev; /* 76 */ unsigned long system_serial_low; /* 80 */ unsigned long system_serial_high; /* 84 */ unsigned long mem_fclk_21285; /* 88 */ } s; char unused[256]; } u1; union { char paths[8][128]; struct { unsigned long magic; char n[1024 - sizeof(unsigned long)]; } s; } u2; char commandline[COMMAND_LINE_SIZE]; }; 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) { struct tag *tag = taglist; if (params->u1.s.page_size != PAGE_SIZE) { printk(KERN_WARNING "Warning: bad configuration page, " "trying to continue\n"); return; } printk(KERN_DEBUG "Converting old-style param struct to taglist\n"); 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; tag = memtag(tag, PHYS_OFFSET, params->u1.s.nr_pages * PAGE_SIZE); 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; 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 = ATAG_NONE; tag->hdr.size = 0; memmove(params, taglist, ((int)tag) - ((int)taglist) + sizeof(struct tag_header)); } void __init convert_to_tag_list(struct tag *tags) { struct param_struct *params = (struct param_struct *)tags; build_tag_list(params, ¶ms->u2); } void __init squash_mem_tags(struct tag *tag) { for (; tag->hdr.size; tag = tag_next(tag)) if (tag->hdr.tag == ATAG_MEM) tag->hdr.tag = ATAG_NONE; } |