24a1a47562
The ATAG_BOARDINFO is intended to hand over the information bd->bi_board_number from u-boot to the kernel. This piece of information can be used to implement some kind of board identification while booting the kernel. Therefore it is placed in .initdata section and can be accessed via the new symbol board_number only while initializing the kernel. Signed-off-by: Andreas Bießmann <biessmann@corscience.de> Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
/*
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* Copyright (C) 2004-2006 Atmel Corporation
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*
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* Based on linux/include/asm-arm/setup.h
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* Copyright (C) 1997-1999 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_AVR32_SETUP_H__
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#define __ASM_AVR32_SETUP_H__
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#define COMMAND_LINE_SIZE 256
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#ifdef __KERNEL__
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/* Magic number indicating that a tag table is present */
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#define ATAG_MAGIC 0xa2a25441
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#ifndef __ASSEMBLY__
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/*
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* Generic memory range, used by several tags.
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*
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* addr is always physical.
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* size is measured in bytes.
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* next is for use by the OS, e.g. for grouping regions into
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* linked lists.
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*/
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struct tag_mem_range {
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u32 addr;
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u32 size;
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struct tag_mem_range * next;
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};
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/* The list ends with an ATAG_NONE node. */
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#define ATAG_NONE 0x00000000
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struct tag_header {
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u32 size;
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u32 tag;
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};
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/* The list must start with an ATAG_CORE node */
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#define ATAG_CORE 0x54410001
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struct tag_core {
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u32 flags;
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u32 pagesize;
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u32 rootdev;
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};
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/* it is allowed to have multiple ATAG_MEM nodes */
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#define ATAG_MEM 0x54410002
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/* ATAG_MEM uses tag_mem_range */
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/* command line: \0 terminated string */
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#define ATAG_CMDLINE 0x54410003
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struct tag_cmdline {
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char cmdline[1]; /* this is the minimum size */
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};
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/* Ramdisk image (may be compressed) */
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#define ATAG_RDIMG 0x54410004
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/* ATAG_RDIMG uses tag_mem_range */
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/* Information about various clocks present in the system */
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#define ATAG_CLOCK 0x54410005
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struct tag_clock {
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u32 clock_id; /* Which clock are we talking about? */
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u32 clock_flags; /* Special features */
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u64 clock_hz; /* Clock speed in Hz */
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};
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/* The clock types we know about */
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#define CLOCK_BOOTCPU 0
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/* Memory reserved for the system (e.g. the bootloader) */
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#define ATAG_RSVD_MEM 0x54410006
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/* ATAG_RSVD_MEM uses tag_mem_range */
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/* Ethernet information */
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#define ATAG_ETHERNET 0x54410007
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struct tag_ethernet {
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u8 mac_index;
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u8 mii_phy_addr;
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u8 hw_address[6];
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};
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#define ETH_INVALID_PHY 0xff
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/* board information */
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#define ATAG_BOARDINFO 0x54410008
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struct tag_boardinfo {
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u32 board_number;
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};
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struct tag {
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struct tag_header hdr;
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union {
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struct tag_core core;
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struct tag_mem_range mem_range;
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struct tag_cmdline cmdline;
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struct tag_clock clock;
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struct tag_ethernet ethernet;
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struct tag_boardinfo boardinfo;
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} u;
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};
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struct tagtable {
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u32 tag;
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int (*parse)(struct tag *);
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};
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#define __tag __used __attribute__((__section__(".taglist.init")))
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#define __tagtable(tag, fn) \
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static struct tagtable __tagtable_##fn __tag = { tag, fn }
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#define tag_member_present(tag,member) \
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((unsigned long)(&((struct tag *)0L)->member + 1) \
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<= (tag)->hdr.size * 4)
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#define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
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#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
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#define for_each_tag(t,base) \
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for (t = base; t->hdr.size; t = tag_next(t))
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extern struct tag *bootloader_tags;
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extern resource_size_t fbmem_start;
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extern resource_size_t fbmem_size;
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extern u32 board_number;
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void setup_processor(void);
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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* __ASM_AVR32_SETUP_H__ */
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