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/*
* Copyright (C) 2006 Atmel Corporation
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __ASM_AVR32_PROCESSOR_H
#define __ASM_AVR32_PROCESSOR_H
#ifndef __ASSEMBLY__
#define current_text_addr() ({ void *pc; __asm__("mov %0,pc" : "=r"(pc)); pc; })
struct avr32_cpuinfo {
unsigned long loops_per_jiffy;
};
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
/* TODO: Make configurable (2GB will serve as a reasonable default) */
#define TASK_SIZE 0x80000000
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's
*/
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
#define cpu_relax() barrier()
#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
/* This struct contains the CPU context as stored by switch_to() */
struct thread_struct {
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;
};
#define INIT_THREAD { \
.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) \
set_fs(USER_DS); \
regs->sr = 0; /* User mode. */ \
regs->gr[REG_PC] = new_pc; \
regs->gr[REG_SP] = new_sp
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.pc)
#endif /* __ASSEMBLY__ */
#endif /* __ASM_AVR32_PROCESSOR_H */
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