1 /* 2 * Copyright (C) 2004-2006 Atmel Corporation 3 * 4 * Based on linux/include/asm-arm/setup.h 5 * Copyright (C) 1997-1999 Russell King 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #ifndef __ASM_AVR32_SETUP_H__ 12 #define __ASM_AVR32_SETUP_H__ 13 14 #define COMMAND_LINE_SIZE 256 15 16 #ifdef __KERNEL__ 17 18 /* Magic number indicating that a tag table is present */ 19 #define ATAG_MAGIC 0xa2a25441 20 21 #ifndef __ASSEMBLY__ 22 23 /* 24 * Generic memory range, used by several tags. 25 * 26 * addr is always physical. 27 * size is measured in bytes. 28 * next is for use by the OS, e.g. for grouping regions into 29 * linked lists. 30 */ 31 struct tag_mem_range { 32 u32 addr; 33 u32 size; 34 struct tag_mem_range * next; 35 }; 36 37 /* The list ends with an ATAG_NONE node. */ 38 #define ATAG_NONE 0x00000000 39 40 struct tag_header { 41 u32 size; 42 u32 tag; 43 }; 44 45 /* The list must start with an ATAG_CORE node */ 46 #define ATAG_CORE 0x54410001 47 48 struct tag_core { 49 u32 flags; 50 u32 pagesize; 51 u32 rootdev; 52 }; 53 54 /* it is allowed to have multiple ATAG_MEM nodes */ 55 #define ATAG_MEM 0x54410002 56 /* ATAG_MEM uses tag_mem_range */ 57 58 /* command line: \0 terminated string */ 59 #define ATAG_CMDLINE 0x54410003 60 61 struct tag_cmdline { 62 char cmdline[1]; /* this is the minimum size */ 63 }; 64 65 /* Ramdisk image (may be compressed) */ 66 #define ATAG_RDIMG 0x54410004 67 /* ATAG_RDIMG uses tag_mem_range */ 68 69 /* Information about various clocks present in the system */ 70 #define ATAG_CLOCK 0x54410005 71 72 struct tag_clock { 73 u32 clock_id; /* Which clock are we talking about? */ 74 u32 clock_flags; /* Special features */ 75 u64 clock_hz; /* Clock speed in Hz */ 76 }; 77 78 /* The clock types we know about */ 79 #define CLOCK_BOOTCPU 0 80 81 /* Memory reserved for the system (e.g. the bootloader) */ 82 #define ATAG_RSVD_MEM 0x54410006 83 /* ATAG_RSVD_MEM uses tag_mem_range */ 84 85 /* Ethernet information */ 86 87 #define ATAG_ETHERNET 0x54410007 88 89 struct tag_ethernet { 90 u8 mac_index; 91 u8 mii_phy_addr; 92 u8 hw_address[6]; 93 }; 94 95 #define ETH_INVALID_PHY 0xff 96 97 /* board information */ 98 #define ATAG_BOARDINFO 0x54410008 99 100 struct tag_boardinfo { 101 u32 board_number; 102 }; 103 104 struct tag { 105 struct tag_header hdr; 106 union { 107 struct tag_core core; 108 struct tag_mem_range mem_range; 109 struct tag_cmdline cmdline; 110 struct tag_clock clock; 111 struct tag_ethernet ethernet; 112 struct tag_boardinfo boardinfo; 113 } u; 114 }; 115 116 struct tagtable { 117 u32 tag; 118 int (*parse)(struct tag *); 119 }; 120 121 #define __tag __used __attribute__((__section__(".taglist.init"))) 122 #define __tagtable(tag, fn) \ 123 static struct tagtable __tagtable_##fn __tag = { tag, fn } 124 125 #define tag_member_present(tag,member) \ 126 ((unsigned long)(&((struct tag *)0L)->member + 1) \ 127 <= (tag)->hdr.size * 4) 128 129 #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size)) 130 #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) 131 132 #define for_each_tag(t,base) \ 133 for (t = base; t->hdr.size; t = tag_next(t)) 134 135 extern struct tag *bootloader_tags; 136 137 extern resource_size_t fbmem_start; 138 extern resource_size_t fbmem_size; 139 extern u32 board_number; 140 141 void setup_processor(void); 142 143 #endif /* !__ASSEMBLY__ */ 144 145 #endif /* __KERNEL__ */ 146 147 #endif /* __ASM_AVR32_SETUP_H__ */ 148