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