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