[PATCH] avr32 architecture

This adds support for the Atmel AVR32 architecture as well as the AT32AP7000
CPU and the AT32STK1000 development board.

AVR32 is a new high-performance 32-bit RISC microprocessor core, designed for
cost-sensitive embedded applications, with particular emphasis on low power
consumption and high code density.  The AVR32 architecture is not binary
compatible with earlier 8-bit AVR architectures.

The AVR32 architecture, including the instruction set, is described by the
AVR32 Architecture Manual, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32000.pdf

The Atmel AT32AP7000 is the first CPU implementing the AVR32 architecture.  It
features a 7-stage pipeline, 16KB instruction and data caches and a full
Memory Management Unit.  It also comes with a large set of integrated
peripherals, many of which are shared with the AT91 ARM-based controllers from
Atmel.

Full data sheet is available from

http://www.atmel.com/dyn/resources/prod_documents/doc32003.pdf

while the CPU core implementation including caches and MMU is documented by
the AVR32 AP Technical Reference, available from

http://www.atmel.com/dyn/resources/prod_documents/doc32001.pdf

Information about the AT32STK1000 development board can be found at

http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3918

including a BSP CD image with an earlier version of this patch, development
tools (binaries and source/patches) and a root filesystem image suitable for
booting from SD card.

Alternatively, there's a preliminary "getting started" guide available at
http://avr32linux.org/twiki/bin/view/Main/GettingStarted which provides links
to the sources and patches you will need in order to set up a cross-compiling
environment for avr32-linux.

This patch, as well as the other patches included with the BSP and the
toolchain patches, is actively supported by Atmel Corporation.

[dmccr@us.ibm.com: Fix more pxx_page macro locations]
[bunk@stusta.de: fix `make defconfig']
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Dave McCracken <dmccr@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/include/asm-avr32/setup.h b/include/asm-avr32/setup.h
new file mode 100644
index 000000000000..10193da4113b
--- /dev/null
+++ b/include/asm-avr32/setup.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * Based on linux/include/asm-arm/setup.h
+ *   Copyright (C) 1997-1999 Russel King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_SETUP_H__
+#define __ASM_AVR32_SETUP_H__
+
+#define COMMAND_LINE_SIZE 256
+
+/* Magic number indicating that a tag table is present */
+#define ATAG_MAGIC      0xa2a25441
+
+#ifndef __ASSEMBLY__
+
+/*
+ * Generic memory range, used by several tags.
+ *
+ *   addr is always physical.
+ *   size is measured in bytes.
+ *   next is for use by the OS, e.g. for grouping regions into
+ *        linked lists.
+ */
+struct tag_mem_range {
+        u32                     addr;
+        u32                     size;
+        struct tag_mem_range *  next;
+};
+
+/* The list ends with an ATAG_NONE node. */
+#define ATAG_NONE       0x00000000
+
+struct tag_header {
+        u32 size;
+        u32 tag;
+};
+
+/* The list must start with an ATAG_CORE node */
+#define ATAG_CORE       0x54410001
+
+struct tag_core {
+        u32 flags;
+        u32 pagesize;
+        u32 rootdev;
+};
+
+/* it is allowed to have multiple ATAG_MEM nodes */
+#define ATAG_MEM        0x54410002
+/* ATAG_MEM uses tag_mem_range */
+
+/* command line: \0 terminated string */
+#define ATAG_CMDLINE    0x54410003
+
+struct tag_cmdline {
+        char    cmdline[1];     /* this is the minimum size */
+};
+
+/* Ramdisk image (may be compressed) */
+#define ATAG_RDIMG      0x54410004
+/* ATAG_RDIMG uses tag_mem_range */
+
+/* Information about various clocks present in the system */
+#define ATAG_CLOCK      0x54410005
+
+struct tag_clock {
+        u32     clock_id;       /* Which clock are we talking about? */
+        u32     clock_flags;    /* Special features */
+        u64     clock_hz;       /* Clock speed in Hz */
+};
+
+/* The clock types we know about */
+#define CLOCK_BOOTCPU   0
+
+/* Memory reserved for the system (e.g. the bootloader) */
+#define ATAG_RSVD_MEM   0x54410006
+/* ATAG_RSVD_MEM uses tag_mem_range */
+
+/* Ethernet information */
+
+#define ATAG_ETHERNET   0x54410007
+
+struct tag_ethernet {
+        u8      mac_index;
+        u8      mii_phy_addr;
+        u8      hw_address[6];
+};
+
+#define ETH_INVALID_PHY 0xff
+
+struct tag {
+        struct tag_header hdr;
+        union {
+                struct tag_core core;
+                struct tag_mem_range mem_range;
+                struct tag_cmdline cmdline;
+                struct tag_clock clock;
+                struct tag_ethernet ethernet;
+        } u;
+};
+
+struct tagtable {
+        u32     tag;
+        int     (*parse)(struct tag *);
+};
+
+#define __tag __attribute_used__ __attribute__((__section__(".taglist")))
+#define __tagtable(tag, fn)                                             \
+        static struct tagtable __tagtable_##fn __tag = { tag, fn }
+
+#define tag_member_present(tag,member)                                  \
+        ((unsigned long)(&((struct tag *)0L)->member + 1)               \
+         <= (tag)->hdr.size * 4)
+
+#define tag_next(t)     ((struct tag *)((u32 *)(t) + (t)->hdr.size))
+#define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
+
+#define for_each_tag(t,base)                                            \
+        for (t = base; t->hdr.size; t = tag_next(t))
+
+extern struct tag_mem_range *mem_phys;
+extern struct tag_mem_range *mem_reserved;
+extern struct tag_mem_range *mem_ramdisk;
+
+extern struct tag *bootloader_tags;
+
+extern void setup_bootmem(void);
+extern void setup_processor(void);
+extern void board_setup_fbmem(unsigned long fbmem_start,
+                              unsigned long fbmem_size);
+
+/* Chip-specific hook to enable the use of SDRAM */
+void chip_enable_sdram(void);
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_AVR32_SETUP_H__ */