1/* 2 * Copyright (C) 2004-2006 Atmel Corporation 3 * 4 * Based on linux/include/asm-arm/setup.h 5 * Copyright (C) 1997-1999 Russel 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 */ 31struct 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 40struct 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 48struct 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 61struct 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 72struct 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 89struct 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 97struct tag { 98 struct tag_header hdr; 99 union { 100 struct tag_core core; 101 struct tag_mem_range mem_range; 102 struct tag_cmdline cmdline; 103 struct tag_clock clock; 104 struct tag_ethernet ethernet; 105 } u; 106}; 107 108struct tagtable { 109 u32 tag; 110 int (*parse)(struct tag *); 111}; 112 113#define __tag __attribute_used__ __attribute__((__section__(".taglist.init"))) 114#define __tagtable(tag, fn) \ 115 static struct tagtable __tagtable_##fn __tag = { tag, fn } 116 117#define tag_member_present(tag,member) \ 118 ((unsigned long)(&((struct tag *)0L)->member + 1) \ 119 <= (tag)->hdr.size * 4) 120 121#define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size)) 122#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) 123 124#define for_each_tag(t,base) \ 125 for (t = base; t->hdr.size; t = tag_next(t)) 126 127extern struct tag *bootloader_tags; 128 129extern resource_size_t fbmem_start; 130extern resource_size_t fbmem_size; 131 132void setup_processor(void); 133 134#endif /* !__ASSEMBLY__ */ 135 136#endif /* __KERNEL__ */ 137 138#endif /* __ASM_AVR32_SETUP_H__ */ 139