/* *  Port on Texas Instruments TMS320C6x architecture * *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) * *  Updated for 2.6.34: Mark Salter <msalter@redhat.com> * *  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_C6X_PROCESSOR_H#define _ASM_C6X_PROCESSOR_H #include <asm/ptrace.h>#include <asm/page.h>#include <asm/current.h> /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr()			\({						\	void *__pc;				\	asm("mvc .S2 pce1,%0\n" : "=b"(__pc));	\	__pc;					\}) /* * User space process size. This is mostly meaningless for NOMMU * but some C6X processors may have RAM addresses up to 0xFFFFFFFF. * Since calls like mmap() can return an address or an error, we * have to allow room for error returns when code does something * like: * *       addr = do_mmap(...) *       if ((unsigned long)addr >= TASK_SIZE) *            ... its an error code, not an address ... * * Here, we allow for 4096 error codes which means we really can't * use the last 4K page on systems with RAM extending all the way * to the end of the 32-bit address space. */#define TASK_SIZE	0xFFFFF000 /* * This decides where the kernel will search for a free chunk of vm * space during mmap's. We won't be using it */#define TASK_UNMAPPED_BASE	0 struct thread_struct {	unsigned long long b15_14;	unsigned long long a15_14;	unsigned long long b13_12;	unsigned long long a13_12;	unsigned long long b11_10;	unsigned long long a11_10;	unsigned long long ricl_icl;	unsigned long  usp;		/* user stack pointer */	unsigned long  pc;		/* kernel pc */	unsigned long  wchan;}; #define INIT_THREAD					\{							\	.usp = 0,					\	.wchan = 0,					\} #define INIT_MMAP { \	&init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \	NULL, NULL } #define task_pt_regs(task) \	((struct pt_regs *)(THREAD_START_SP + task_stack_page(task)) - 1) #define alloc_kernel_stack()	__get_free_page(GFP_KERNEL)#define free_kernel_stack(page) free_page((page))  /* Forward declaration, a strange C thing */struct task_struct; extern void start_thread(struct pt_regs *regs, unsigned int pc,			 unsigned long usp); /* Free all resources held by a thread. */static inline void release_thread(struct task_struct *dead_task){} #define copy_segments(tsk, mm)		do { } while (0)#define release_segments(mm)		do { } while (0) /* * saved PC of a blocked thread. */#define thread_saved_pc(tsk) (task_pt_regs(tsk)->pc) /* * saved kernel SP and DP of a blocked thread. */#ifdef _BIG_ENDIAN#define thread_saved_ksp(tsk) \	(*(unsigned long *)&(tsk)->thread.b15_14)#define thread_saved_dp(tsk) \	(*(((unsigned long *)&(tsk)->thread.b15_14) + 1))#else#define thread_saved_ksp(tsk) \	(*(((unsigned long *)&(tsk)->thread.b15_14) + 1))#define thread_saved_dp(tsk) \	(*(unsigned long *)&(tsk)->thread.b15_14)#endif extern unsigned long get_wchan(struct task_struct *p); #define KSTK_EIP(task)	(task_pt_regs(task)->pc)#define KSTK_ESP(task)	(task_pt_regs(task)->sp) #define cpu_relax()		do { } while (0) extern const struct seq_operations cpuinfo_op; /* Reset the board */#define HARD_RESET_NOW() extern unsigned int c6x_core_freq;  extern void (*c6x_restart)(void);extern void (*c6x_halt)(void); #endif /* ASM_C6X_PROCESSOR_H */