/* $Id: processor.h,v 1.83 2001/10/08 09:32:13 davem Exp $ * include/asm-sparc/processor.h * * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) */ #ifndef __ASM_SPARC_PROCESSOR_H#define __ASM_SPARC_PROCESSOR_H /* * Sparc32 implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr() ({ void *pc; __asm__("sethi %%hi(1f), %0; or %0, %%lo(1f), %0;\n1:" : "=r" (pc)); pc; }) #include <linux/a.out.h> #include <asm/psr.h>#include <asm/ptrace.h>#include <asm/head.h>#include <asm/signal.h>#include <asm/segment.h>#include <asm/btfixup.h>#include <asm/page.h> /* * The sparc has no problems with write protection */#define wp_works_ok 1#define wp_works_ok__is_a_macro /* for versions in ksyms.c */ /* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too...  * That one page is used to protect kernel from intruders, so that * we can make our access_ok test faster */#define TASK_SIZE	PAGE_OFFSET struct task_struct; #ifdef __KERNEL__struct fpq {	unsigned long *insn_addr;	unsigned long insn;};#endif typedef struct {	int seg;} mm_segment_t; /* The Sparc processor specific thread struct. */struct thread_struct {	struct pt_regs *kregs;	unsigned int _pad1; 	/* Special child fork kpsr/kwim values. */	unsigned long fork_kpsr __attribute__ ((aligned (8)));	unsigned long fork_kwim; 	/* Floating point regs */	unsigned long   float_regs[32] __attribute__ ((aligned (8)));	unsigned long   fsr;	unsigned long   fpqdepth;	struct fpq	fpqueue[16];	unsigned long flags;	mm_segment_t current_ds;	struct exec core_exec;     /* just what it says. */	int new_signal;}; #define SPARC_FLAG_KTHREAD      0x1    /* task is a kernel thread */#define SPARC_FLAG_UNALIGNED    0x2    /* is allowed to do unaligned accesses */ #define INIT_THREAD  { \	.flags = SPARC_FLAG_KTHREAD, \	.current_ds = KERNEL_DS, \} /* Return saved PC of a blocked thread. */extern unsigned long thread_saved_pc(struct task_struct *t); /* Do necessary setup to start up a newly executed thread. */extern __inline__ void start_thread(struct pt_regs * regs, unsigned long pc,				    unsigned long sp){	register unsigned long zero asm("g1"); 	regs->psr = (regs->psr & (PSR_CWP)) | PSR_S;	regs->pc = ((pc & (~3)) - 4);	regs->npc = regs->pc + 4;	regs->y = 0;	zero = 0;	__asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t"			     "std\t%%g0, [%0 + %3 + 0x08]\n\t"			     "std\t%%g0, [%0 + %3 + 0x10]\n\t"			     "std\t%%g0, [%0 + %3 + 0x18]\n\t"			     "std\t%%g0, [%0 + %3 + 0x20]\n\t"			     "std\t%%g0, [%0 + %3 + 0x28]\n\t"			     "std\t%%g0, [%0 + %3 + 0x30]\n\t"			     "st\t%1, [%0 + %3 + 0x38]\n\t"			     "st\t%%g0, [%0 + %3 + 0x3c]"			     : /* no outputs */			     : "r" (regs),			       "r" (sp - sizeof(struct reg_window)),			       "r" (zero),			       "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))			     : "memory");} /* Free all resources held by a thread. */#define release_thread(tsk)		do { } while(0)extern pid_t 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) extern unsigned long get_wchan(struct task_struct *); #define KSTK_EIP(tsk)  ((tsk)->thread.kregs->pc)#define KSTK_ESP(tsk)  ((tsk)->thread.kregs->u_regs[UREG_FP]) #ifdef __KERNEL__ extern struct task_struct *last_task_used_math; #define cpu_relax()	barrier() #endif #endif /* __ASM_SPARC_PROCESSOR_H */