5f97f7f940
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>
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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* 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_PROCESSOR_H
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#define __ASM_AVR32_PROCESSOR_H
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#include <asm/page.h>
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#include <asm/cache.h>
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#define TASK_SIZE 0x80000000
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#ifndef __ASSEMBLY__
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static inline void *current_text_addr(void)
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{
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register void *pc asm("pc");
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return pc;
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}
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enum arch_type {
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ARCH_AVR32A,
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ARCH_AVR32B,
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ARCH_MAX
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};
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enum cpu_type {
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CPU_MORGAN,
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CPU_AT32AP,
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CPU_MAX
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};
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enum tlb_config {
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TLB_NONE,
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TLB_SPLIT,
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TLB_UNIFIED,
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TLB_INVALID
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};
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struct avr32_cpuinfo {
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struct clk *clk;
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unsigned long loops_per_jiffy;
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enum arch_type arch_type;
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enum cpu_type cpu_type;
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unsigned short arch_revision;
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unsigned short cpu_revision;
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enum tlb_config tlb_config;
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struct cache_info icache;
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struct cache_info dcache;
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};
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extern struct avr32_cpuinfo boot_cpu_data;
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#ifdef CONFIG_SMP
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extern struct avr32_cpuinfo cpu_data[];
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#define current_cpu_data cpu_data[smp_processor_id()]
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#else
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#define cpu_data (&boot_cpu_data)
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#define current_cpu_data boot_cpu_data
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#endif
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/* This decides where the kernel will search for a free chunk of vm
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* space during mmap's
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*/
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#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
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#define cpu_relax() barrier()
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#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
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struct cpu_context {
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unsigned long sr;
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unsigned long pc;
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unsigned long ksp; /* Kernel stack pointer */
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unsigned long r7;
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unsigned long r6;
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unsigned long r5;
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unsigned long r4;
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unsigned long r3;
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unsigned long r2;
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unsigned long r1;
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unsigned long r0;
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};
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/* This struct contains the CPU context as stored by switch_to() */
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struct thread_struct {
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struct cpu_context cpu_context;
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unsigned long single_step_addr;
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u16 single_step_insn;
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};
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#define INIT_THREAD { \
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.cpu_context = { \
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.ksp = sizeof(init_stack) + (long)&init_stack, \
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}, \
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}
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/*
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* Do necessary setup to start up a newly executed thread.
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*/
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#define start_thread(regs, new_pc, new_sp) \
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do { \
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set_fs(USER_DS); \
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memset(regs, 0, sizeof(*regs)); \
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regs->sr = MODE_USER; \
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regs->pc = new_pc & ~1; \
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regs->sp = new_sp; \
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} while(0)
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struct task_struct;
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/* Free all resources held by a thread */
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extern void release_thread(struct task_struct *);
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/* Create a kernel thread without removing it from tasklists */
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extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
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/* Prepare to copy thread state - unlazy all lazy status */
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#define prepare_to_copy(tsk) do { } while(0)
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/* Return saved PC of a blocked thread */
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#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
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struct pt_regs;
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void show_trace(struct task_struct *task, unsigned long *stack,
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struct pt_regs *regs);
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extern unsigned long get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
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#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
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#define ARCH_HAS_PREFETCH
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static inline void prefetch(const void *x)
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{
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const char *c = x;
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asm volatile("pref %0" : : "r"(c));
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}
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#define PREFETCH_STRIDE L1_CACHE_BYTES
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_AVR32_PROCESSOR_H */
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