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Patch by Haavard Skinnemoen, 6 Sep 2006 16:23:02 +0200 This patch adds common infrastructure code for the Atmel AVR32 architecture. See doc/README.AVR32 for details. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
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* Copyright (C) 2006 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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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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#ifndef __ASSEMBLY__
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#define current_text_addr() ({ void *pc; __asm__("mov %0,pc" : "=r"(pc)); pc; })
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struct avr32_cpuinfo {
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unsigned long loops_per_jiffy;
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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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/* TODO: Make configurable (2GB will serve as a reasonable default) */
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#define TASK_SIZE 0x80000000
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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 (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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/* This struct contains the CPU context as stored by switch_to() */
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struct thread_struct {
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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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#define INIT_THREAD { \
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.ksp = sizeof(init_stack) + (long)&init_stack, \
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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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set_fs(USER_DS); \
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regs->sr = 0; /* User mode. */ \
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regs->gr[REG_PC] = new_pc; \
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regs->gr[REG_SP] = new_sp
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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.pc)
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_AVR32_PROCESSOR_H */
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