[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>
2006-09-26 14:32:13 +08:00
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/*
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* Copyright (C) 2004-2006 Atmel Corporation
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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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#include <linux/clk.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/console.h>
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#include <linux/ioport.h>
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#include <linux/bootmem.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/root_dev.h>
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#include <linux/cpu.h>
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2007-02-05 10:41:27 +08:00
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#include <linux/kernel.h>
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[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>
2006-09-26 14:32:13 +08:00
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#include <asm/sections.h>
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#include <asm/processor.h>
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#include <asm/pgtable.h>
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#include <asm/setup.h>
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#include <asm/sysreg.h>
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#include <asm/arch/board.h>
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#include <asm/arch/init.h>
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extern int root_mountflags;
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/*
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* Bootloader-provided information about physical memory
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*/
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struct tag_mem_range *mem_phys;
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struct tag_mem_range *mem_reserved;
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struct tag_mem_range *mem_ramdisk;
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/*
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* Initialize loops_per_jiffy as 5000000 (500MIPS).
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* Better make it too large than too small...
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*/
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struct avr32_cpuinfo boot_cpu_data = {
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.loops_per_jiffy = 5000000
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};
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EXPORT_SYMBOL(boot_cpu_data);
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static char command_line[COMMAND_LINE_SIZE];
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/*
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* Should be more than enough, but if you have a _really_ complex
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* setup, you might need to increase the size of this...
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*/
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static struct tag_mem_range __initdata mem_range_cache[32];
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static unsigned mem_range_next_free;
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/*
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* Standard memory resources
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*/
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static struct resource mem_res[] = {
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{
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.name = "Kernel code",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_MEM
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},
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{
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.name = "Kernel data",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_MEM,
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},
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};
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#define kernel_code mem_res[0]
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#define kernel_data mem_res[1]
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/*
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* Early framebuffer allocation. Works as follows:
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* - If fbmem_size is zero, nothing will be allocated or reserved.
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* - If fbmem_start is zero when setup_bootmem() is called,
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* fbmem_size bytes will be allocated from the bootmem allocator.
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* - If fbmem_start is nonzero, an area of size fbmem_size will be
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* reserved at the physical address fbmem_start if necessary. If
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* the area isn't in a memory region known to the kernel, it will
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* be left alone.
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*
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* Board-specific code may use these variables to set up platform data
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* for the framebuffer driver if fbmem_size is nonzero.
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*/
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static unsigned long __initdata fbmem_start;
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static unsigned long __initdata fbmem_size;
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/*
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* "fbmem=xxx[kKmM]" allocates the specified amount of boot memory for
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* use as framebuffer.
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*
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* "fbmem=xxx[kKmM]@yyy[kKmM]" defines a memory region of size xxx and
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* starting at yyy to be reserved for use as framebuffer.
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*
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* The kernel won't verify that the memory region starting at yyy
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* actually contains usable RAM.
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*/
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static int __init early_parse_fbmem(char *p)
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{
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fbmem_size = memparse(p, &p);
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if (*p == '@')
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fbmem_start = memparse(p, &p);
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return 0;
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}
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early_param("fbmem", early_parse_fbmem);
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static inline void __init resource_init(void)
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{
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struct tag_mem_range *region;
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kernel_code.start = __pa(init_mm.start_code);
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kernel_code.end = __pa(init_mm.end_code - 1);
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kernel_data.start = __pa(init_mm.end_code);
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kernel_data.end = __pa(init_mm.brk - 1);
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for (region = mem_phys; region; region = region->next) {
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struct resource *res;
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unsigned long phys_start, phys_end;
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if (region->size == 0)
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continue;
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phys_start = region->addr;
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phys_end = phys_start + region->size - 1;
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res = alloc_bootmem_low(sizeof(*res));
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res->name = "System RAM";
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res->start = phys_start;
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res->end = phys_end;
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res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
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request_resource (&iomem_resource, res);
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if (kernel_code.start >= res->start &&
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kernel_code.end <= res->end)
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request_resource (res, &kernel_code);
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if (kernel_data.start >= res->start &&
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kernel_data.end <= res->end)
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request_resource (res, &kernel_data);
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}
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}
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static int __init parse_tag_core(struct tag *tag)
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{
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if (tag->hdr.size > 2) {
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if ((tag->u.core.flags & 1) == 0)
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root_mountflags &= ~MS_RDONLY;
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ROOT_DEV = new_decode_dev(tag->u.core.rootdev);
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}
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return 0;
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}
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__tagtable(ATAG_CORE, parse_tag_core);
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static int __init parse_tag_mem_range(struct tag *tag,
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struct tag_mem_range **root)
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{
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struct tag_mem_range *cur, **pprev;
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struct tag_mem_range *new;
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/*
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* Ignore zero-sized entries. If we're running standalone, the
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* SDRAM code may emit such entries if something goes
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* wrong...
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*/
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if (tag->u.mem_range.size == 0)
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return 0;
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/*
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* Copy the data so the bootmem init code doesn't need to care
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* about it.
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*/
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2007-02-05 10:41:27 +08:00
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if (mem_range_next_free >= ARRAY_SIZE(mem_range_cache))
|
[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>
2006-09-26 14:32:13 +08:00
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panic("Physical memory map too complex!\n");
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new = &mem_range_cache[mem_range_next_free++];
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*new = tag->u.mem_range;
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pprev = root;
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cur = *root;
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while (cur) {
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pprev = &cur->next;
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cur = cur->next;
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}
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*pprev = new;
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new->next = NULL;
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return 0;
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}
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static int __init parse_tag_mem(struct tag *tag)
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{
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return parse_tag_mem_range(tag, &mem_phys);
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}
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__tagtable(ATAG_MEM, parse_tag_mem);
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static int __init parse_tag_cmdline(struct tag *tag)
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{
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strlcpy(saved_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
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return 0;
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}
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__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
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static int __init parse_tag_rdimg(struct tag *tag)
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{
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return parse_tag_mem_range(tag, &mem_ramdisk);
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}
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__tagtable(ATAG_RDIMG, parse_tag_rdimg);
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static int __init parse_tag_clock(struct tag *tag)
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{
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/*
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* We'll figure out the clocks by peeking at the system
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* manager regs directly.
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*/
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return 0;
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}
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__tagtable(ATAG_CLOCK, parse_tag_clock);
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static int __init parse_tag_rsvd_mem(struct tag *tag)
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{
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return parse_tag_mem_range(tag, &mem_reserved);
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}
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__tagtable(ATAG_RSVD_MEM, parse_tag_rsvd_mem);
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/*
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* Scan the tag table for this tag, and call its parse function. The
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* tag table is built by the linker from all the __tagtable
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* declarations.
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*/
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static int __init parse_tag(struct tag *tag)
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{
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extern struct tagtable __tagtable_begin, __tagtable_end;
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struct tagtable *t;
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for (t = &__tagtable_begin; t < &__tagtable_end; t++)
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if (tag->hdr.tag == t->tag) {
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t->parse(tag);
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break;
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}
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return t < &__tagtable_end;
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}
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/*
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* Parse all tags in the list we got from the boot loader
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*/
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static void __init parse_tags(struct tag *t)
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{
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for (; t->hdr.tag != ATAG_NONE; t = tag_next(t))
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if (!parse_tag(t))
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printk(KERN_WARNING
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"Ignoring unrecognised tag 0x%08x\n",
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t->hdr.tag);
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}
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void __init setup_arch (char **cmdline_p)
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{
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struct clk *cpu_clk;
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parse_tags(bootloader_tags);
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setup_processor();
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setup_platform();
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2006-10-04 22:02:10 +08:00
|
|
|
setup_board();
|
[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>
2006-09-26 14:32:13 +08:00
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cpu_clk = clk_get(NULL, "cpu");
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if (IS_ERR(cpu_clk)) {
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printk(KERN_WARNING "Warning: Unable to get CPU clock\n");
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} else {
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unsigned long cpu_hz = clk_get_rate(cpu_clk);
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/*
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* Well, duh, but it's probably a good idea to
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* increment the use count.
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*/
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clk_enable(cpu_clk);
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boot_cpu_data.clk = cpu_clk;
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boot_cpu_data.loops_per_jiffy = cpu_hz * 4;
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printk("CPU: Running at %lu.%03lu MHz\n",
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((cpu_hz + 500) / 1000) / 1000,
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((cpu_hz + 500) / 1000) % 1000);
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}
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init_mm.start_code = (unsigned long) &_text;
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init_mm.end_code = (unsigned long) &_etext;
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init_mm.end_data = (unsigned long) &_edata;
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init_mm.brk = (unsigned long) &_end;
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strlcpy(command_line, saved_command_line, COMMAND_LINE_SIZE);
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*cmdline_p = command_line;
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parse_early_param();
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setup_bootmem();
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board_setup_fbmem(fbmem_start, fbmem_size);
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#ifdef CONFIG_VT
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conswitchp = &dummy_con;
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#endif
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paging_init();
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resource_init();
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}
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