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Patch by Haavard Skinnemoen, 6 Sep 2006 16:23:02 +0200 This patch adds common infrastructure code for the Atmel AVR32 architecture. See doc/README.AVR32 for details. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
143 lines
3.5 KiB
C
143 lines
3.5 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 Russel King
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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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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/* 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 ACLOCK_BOOTCPU 0 /* The CPU we're booting from */
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#define ACLOCK_HSB 1 /* Deprecated */
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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 AETH_INVALID_PHY 0xff
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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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} 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 __attribute_used__ __attribute__((__section__(".taglist")))
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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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#endif /* !__ASSEMBLY__ */
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#endif /* __ASM_AVR32_SETUP_H__ */
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