[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, 110 insertions, 0 deletions

diff --git a/include/asm-avr32/elf.h b/include/asm-avr32/elf.h
new file mode 100644
index 000000000000..d334b4994d2d
--- /dev/null
+++ b/include/asm-avr32/elf.h
@@ -0,0 +1,110 @@
+#ifndef __ASM_AVR32_ELF_H
+#define __ASM_AVR32_ELF_H
+
+/* AVR32 relocation numbers */
+#define R_AVR32_NONE            0
+#define R_AVR32_32              1
+#define R_AVR32_16              2
+#define R_AVR32_8               3
+#define R_AVR32_32_PCREL        4
+#define R_AVR32_16_PCREL        5
+#define R_AVR32_8_PCREL         6
+#define R_AVR32_DIFF32          7
+#define R_AVR32_DIFF16          8
+#define R_AVR32_DIFF8           9
+#define R_AVR32_GOT32           10
+#define R_AVR32_GOT16           11
+#define R_AVR32_GOT8            12
+#define R_AVR32_21S             13
+#define R_AVR32_16U             14
+#define R_AVR32_16S             15
+#define R_AVR32_8S              16
+#define R_AVR32_8S_EXT          17
+#define R_AVR32_22H_PCREL       18
+#define R_AVR32_18W_PCREL       19
+#define R_AVR32_16B_PCREL       20
+#define R_AVR32_16N_PCREL       21
+#define R_AVR32_14UW_PCREL      22
+#define R_AVR32_11H_PCREL       23
+#define R_AVR32_10UW_PCREL      24
+#define R_AVR32_9H_PCREL        25
+#define R_AVR32_9UW_PCREL       26
+#define R_AVR32_HI16            27
+#define R_AVR32_LO16            28
+#define R_AVR32_GOTPC           29
+#define R_AVR32_GOTCALL         30
+#define R_AVR32_LDA_GOT         31
+#define R_AVR32_GOT21S          32
+#define R_AVR32_GOT18SW         33
+#define R_AVR32_GOT16S          34
+#define R_AVR32_GOT7UW          35
+#define R_AVR32_32_CPENT        36
+#define R_AVR32_CPCALL          37
+#define R_AVR32_16_CP           38
+#define R_AVR32_9W_CP           39
+#define R_AVR32_RELATIVE        40
+#define R_AVR32_GLOB_DAT        41
+#define R_AVR32_JMP_SLOT        42
+#define R_AVR32_ALIGN           43
+
+/*
+ * ELF register definitions..
+ */
+
+#include <asm/ptrace.h>
+#include <asm/user.h>
+
+typedef unsigned long elf_greg_t;
+
+#define ELF_NGREG (sizeof (struct pt_regs) / sizeof (elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+typedef struct user_fpu_struct elf_fpregset_t;
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) ( (x)->e_machine == EM_AVR32 )
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#define ELF_CLASS       ELFCLASS32
+#ifdef __LITTLE_ENDIAN__
+#define ELF_DATA        ELFDATA2LSB
+#else
+#define ELF_DATA        ELFDATA2MSB
+#endif
+#define ELF_ARCH        EM_AVR32
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE       4096
+
+/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
+   use of this is to invoke "./ld.so someprog" to test out a new version of
+   the loader.  We need to make sure that it is out of the way of the program
+   that it will "exec", and that there is sufficient room for the brk.  */
+
+#define ELF_ET_DYN_BASE         (2 * TASK_SIZE / 3)
+
+
+/* This yields a mask that user programs can use to figure out what
+   instruction set this CPU supports.  This could be done in user space,
+   but it's not easy, and we've already done it here.  */
+
+#define ELF_HWCAP       (0)
+
+/* This yields a string that ld.so will use to load implementation
+   specific libraries for optimization.  This is more specific in
+   intent than poking at uname or /proc/cpuinfo.
+
+   For the moment, we have only optimizations for the Intel generations,
+   but that could change... */
+
+#define ELF_PLATFORM  (NULL)
+
+#ifdef __KERNEL__
+#define SET_PERSONALITY(ex, ibcs2) set_personality(PER_LINUX_32BIT)
+#endif
+
+#endif /* __ASM_AVR32_ELF_H */