OpenCloudOS-Kernel/include/asm-avr32/processor.h

148 lines
3.2 KiB
C
Raw Normal View History

[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
/*
* Copyright (C) 2004-2006 Atmel Corporation
*
* 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_PROCESSOR_H
#define __ASM_AVR32_PROCESSOR_H
#include <asm/page.h>
#include <asm/cache.h>
#define TASK_SIZE 0x80000000
#ifndef __ASSEMBLY__
static inline void *current_text_addr(void)
{
register void *pc asm("pc");
return pc;
}
enum arch_type {
ARCH_AVR32A,
ARCH_AVR32B,
ARCH_MAX
};
enum cpu_type {
CPU_MORGAN,
CPU_AT32AP,
CPU_MAX
};
enum tlb_config {
TLB_NONE,
TLB_SPLIT,
TLB_UNIFIED,
TLB_INVALID
};
struct avr32_cpuinfo {
struct clk *clk;
unsigned long loops_per_jiffy;
enum arch_type arch_type;
enum cpu_type cpu_type;
unsigned short arch_revision;
unsigned short cpu_revision;
enum tlb_config tlb_config;
struct cache_info icache;
struct cache_info dcache;
};
extern struct avr32_cpuinfo boot_cpu_data;
#ifdef CONFIG_SMP
extern struct avr32_cpuinfo cpu_data[];
#define current_cpu_data cpu_data[smp_processor_id()]
#else
#define cpu_data (&boot_cpu_data)
#define current_cpu_data boot_cpu_data
#endif
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's
*/
#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
#define cpu_relax() barrier()
#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
struct cpu_context {
unsigned long sr;
unsigned long pc;
unsigned long ksp; /* Kernel stack pointer */
unsigned long r7;
unsigned long r6;
unsigned long r5;
unsigned long r4;
unsigned long r3;
unsigned long r2;
unsigned long r1;
unsigned long r0;
};
/* This struct contains the CPU context as stored by switch_to() */
struct thread_struct {
struct cpu_context cpu_context;
unsigned long single_step_addr;
u16 single_step_insn;
};
#define INIT_THREAD { \
.cpu_context = { \
.ksp = sizeof(init_stack) + (long)&init_stack, \
}, \
}
/*
* Do necessary setup to start up a newly executed thread.
*/
#define start_thread(regs, new_pc, new_sp) \
do { \
set_fs(USER_DS); \
memset(regs, 0, sizeof(*regs)); \
regs->sr = MODE_USER; \
regs->pc = new_pc & ~1; \
regs->sp = new_sp; \
} while(0)
struct task_struct;
/* Free all resources held by a thread */
extern void release_thread(struct task_struct *);
/* Create a kernel thread without removing it from tasklists */
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk) do { } while(0)
/* Return saved PC of a blocked thread */
#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
struct pt_regs;
void show_trace(struct task_struct *task, unsigned long *stack,
struct pt_regs *regs);
extern unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
#define ARCH_HAS_PREFETCH
static inline void prefetch(const void *x)
{
const char *c = x;
asm volatile("pref %0" : : "r"(c));
}
#define PREFETCH_STRIDE L1_CACHE_BYTES
#endif /* __ASSEMBLY__ */
#endif /* __ASM_AVR32_PROCESSOR_H */