/*
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* linux/arch/unicore32/include/asm/processor.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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 __UNICORE_PROCESSOR_H__
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#define __UNICORE_PROCESSOR_H__
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l; })
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#ifdef __KERNEL__
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#include <asm/ptrace.h>
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#include <asm/types.h>
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#ifdef __KERNEL__
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#define STACK_TOP TASK_SIZE
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#define STACK_TOP_MAX TASK_SIZE
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#endif
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struct debug_entry {
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u32 address;
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u32 insn;
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};
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struct debug_info {
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int nsaved;
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struct debug_entry bp[2];
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};
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struct thread_struct {
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/* fault info */
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unsigned long address;
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unsigned long trap_no;
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unsigned long error_code;
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/* debugging */
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struct debug_info debug;
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};
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#define INIT_THREAD { }
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#define start_thread(regs, pc, sp) \
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({ \
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unsigned long *stack = (unsigned long *)sp; \
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memset(regs->uregs, 0, sizeof(regs->uregs)); \
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regs->UCreg_asr = USER_MODE; \
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regs->UCreg_pc = pc & ~1; /* pc */ \
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regs->UCreg_sp = sp; /* sp */ \
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regs->UCreg_02 = stack[2]; /* r2 (envp) */ \
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regs->UCreg_01 = stack[1]; /* r1 (argv) */ \
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regs->UCreg_00 = stack[0]; /* r0 (argc) */ \
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})
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/* Forward declaration, a strange C thing */
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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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unsigned long get_wchan(struct task_struct *p);
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#define cpu_relax() barrier()
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#define task_pt_regs(p) \
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((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
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#define KSTK_EIP(tsk) (task_pt_regs(tsk)->UCreg_pc)
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#define KSTK_ESP(tsk) (task_pt_regs(tsk)->UCreg_sp)
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#endif
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#endif /* __UNICORE_PROCESSOR_H__ */
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