/* SPDX-License-Identifier: GPL-2.0 *//* * include/asm/processor.h * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) */ #ifndef __ASM_SPARC64_PROCESSOR_H#define __ASM_SPARC64_PROCESSOR_H #include <asm/asi.h>#include <asm/pstate.h>#include <asm/ptrace.h>#include <asm/page.h> /* * User lives in his very own context, and cannot reference us. Note * that TASK_SIZE is a misnomer, it really gives maximum user virtual * address that the kernel will allocate out. * * XXX No longer using virtual page tables, kill this upper limit... */#define VA_BITS		44#ifndef __ASSEMBLER__#define VPTE_SIZE	(1UL << (VA_BITS - PAGE_SHIFT + 3))#else#define VPTE_SIZE	(1 << (VA_BITS - PAGE_SHIFT + 3))#endif #define TASK_SIZE_OF(tsk) \	(test_tsk_thread_flag(tsk,TIF_32BIT) ? \	 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))#define TASK_SIZE \	(test_thread_flag(TIF_32BIT) ? \	 (1UL << 32UL) : ((unsigned long)-VPTE_SIZE))#ifdef __KERNEL__ #define STACK_TOP32	((1UL << 32UL) - PAGE_SIZE)#define STACK_TOP64	(0x0000080000000000UL - (1UL << 32UL)) #define STACK_TOP	(test_thread_flag(TIF_32BIT) ? \			 STACK_TOP32 : STACK_TOP64) #define STACK_TOP_MAX	STACK_TOP64 #endif #ifndef __ASSEMBLER__ /* The Sparc processor specific thread struct. *//* XXX This should die, everything can go into thread_info now. */struct thread_struct {#ifdef CONFIG_DEBUG_SPINLOCK	/* How many spinlocks held by this thread.	 * Used with spin lock debugging to catch tasks	 * sleeping illegally with locks held.	 */	int smp_lock_count;	unsigned int smp_lock_pc;#else	int dummy; /* f'in gcc bug... */#endif}; #endif /* !(__ASSEMBLER__) */ #ifndef CONFIG_DEBUG_SPINLOCK#define INIT_THREAD  {			\	0,				\}#else /* CONFIG_DEBUG_SPINLOCK */#define INIT_THREAD  {					\/* smp_lock_count, smp_lock_pc, */			\   0,		   0,					\}#endif /* !(CONFIG_DEBUG_SPINLOCK) */ #ifndef __ASSEMBLER__ #include <linux/types.h>#include <asm/fpumacro.h> struct task_struct; /* On Uniprocessor, even in RMO processes see TSO semantics */#ifdef CONFIG_SMP#define TSTATE_INITIAL_MM	TSTATE_TSO#else#define TSTATE_INITIAL_MM	TSTATE_RMO#endif /* Do necessary setup to start up a newly executed thread. */#define start_thread(regs, pc, sp) \do { \	unsigned long __asi = ASI_PNF; \	regs->tstate = (regs->tstate & (TSTATE_CWP)) | (TSTATE_INITIAL_MM|TSTATE_IE) | (__asi << 24UL); \	regs->tpc = ((pc & (~3)) - 4); \	regs->tnpc = regs->tpc + 4; \	regs->y = 0; \	set_thread_wstate(1 << 3); \	if (current_thread_info()->utraps) { \		if (*(current_thread_info()->utraps) < 2) \			kfree(current_thread_info()->utraps); \		else \			(*(current_thread_info()->utraps))--; \		current_thread_info()->utraps = NULL; \	} \	__asm__ __volatile__( \	"stx		%%g0, [%0 + %2 + 0x00]\n\t" \	"stx		%%g0, [%0 + %2 + 0x08]\n\t" \	"stx		%%g0, [%0 + %2 + 0x10]\n\t" \	"stx		%%g0, [%0 + %2 + 0x18]\n\t" \	"stx		%%g0, [%0 + %2 + 0x20]\n\t" \	"stx		%%g0, [%0 + %2 + 0x28]\n\t" \	"stx		%%g0, [%0 + %2 + 0x30]\n\t" \	"stx		%%g0, [%0 + %2 + 0x38]\n\t" \	"stx		%%g0, [%0 + %2 + 0x40]\n\t" \	"stx		%%g0, [%0 + %2 + 0x48]\n\t" \	"stx		%%g0, [%0 + %2 + 0x50]\n\t" \	"stx		%%g0, [%0 + %2 + 0x58]\n\t" \	"stx		%%g0, [%0 + %2 + 0x60]\n\t" \	"stx		%%g0, [%0 + %2 + 0x68]\n\t" \	"stx		%1,   [%0 + %2 + 0x70]\n\t" \	"stx		%%g0, [%0 + %2 + 0x78]\n\t" \	"wrpr		%%g0, (1 << 3), %%wstate\n\t" \	: \	: "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \	  "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \	fprs_write(0);	\	current_thread_info()->xfsr[0] = 0;	\	current_thread_info()->fpsaved[0] = 0;	\	regs->tstate &= ~TSTATE_PEF;	\} while (0) #define start_thread32(regs, pc, sp) \do { \	unsigned long __asi = ASI_PNF; \	pc &= 0x00000000ffffffffUL; \	sp &= 0x00000000ffffffffUL; \	regs->tstate = (regs->tstate & (TSTATE_CWP))|(TSTATE_INITIAL_MM|TSTATE_IE|TSTATE_AM) | (__asi << 24UL); \	regs->tpc = ((pc & (~3)) - 4); \	regs->tnpc = regs->tpc + 4; \	regs->y = 0; \	set_thread_wstate(2 << 3); \	if (current_thread_info()->utraps) { \		if (*(current_thread_info()->utraps) < 2) \			kfree(current_thread_info()->utraps); \		else \			(*(current_thread_info()->utraps))--; \		current_thread_info()->utraps = NULL; \	} \	__asm__ __volatile__( \	"stx		%%g0, [%0 + %2 + 0x00]\n\t" \	"stx		%%g0, [%0 + %2 + 0x08]\n\t" \	"stx		%%g0, [%0 + %2 + 0x10]\n\t" \	"stx		%%g0, [%0 + %2 + 0x18]\n\t" \	"stx		%%g0, [%0 + %2 + 0x20]\n\t" \	"stx		%%g0, [%0 + %2 + 0x28]\n\t" \	"stx		%%g0, [%0 + %2 + 0x30]\n\t" \	"stx		%%g0, [%0 + %2 + 0x38]\n\t" \	"stx		%%g0, [%0 + %2 + 0x40]\n\t" \	"stx		%%g0, [%0 + %2 + 0x48]\n\t" \	"stx		%%g0, [%0 + %2 + 0x50]\n\t" \	"stx		%%g0, [%0 + %2 + 0x58]\n\t" \	"stx		%%g0, [%0 + %2 + 0x60]\n\t" \	"stx		%%g0, [%0 + %2 + 0x68]\n\t" \	"stx		%1,   [%0 + %2 + 0x70]\n\t" \	"stx		%%g0, [%0 + %2 + 0x78]\n\t" \	"wrpr		%%g0, (2 << 3), %%wstate\n\t" \	: \	: "r" (regs), "r" (sp - sizeof(struct reg_window32)), \	  "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \	fprs_write(0);	\	current_thread_info()->xfsr[0] = 0;	\	current_thread_info()->fpsaved[0] = 0;	\	regs->tstate &= ~TSTATE_PEF;	\} while (0) unsigned long __get_wchan(struct task_struct *task); #define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)#define KSTK_EIP(tsk)  (task_pt_regs(tsk)->tpc)#define KSTK_ESP(tsk)  (task_pt_regs(tsk)->u_regs[UREG_FP]) /* Prefetch support.  This is tuned for UltraSPARC-III and later. * UltraSPARC-I will treat these as nops, and UltraSPARC-II has * a shallower prefetch queue than later chips. */#define ARCH_HAS_PREFETCH#define ARCH_HAS_PREFETCHW static inline void prefetch(const void *x){	/* We do not use the read prefetch mnemonic because that	 * prefetches into the prefetch-cache which only is accessible	 * by floating point operations in UltraSPARC-III and later.	 * By contrast, "#one_write" prefetches into the L2 cache	 * in shared state.	 */	__asm__ __volatile__("prefetch [%0], #one_write"			     : /* no outputs */			     : "r" (x));} static inline void prefetchw(const void *x){	/* The most optimal prefetch to use for writes is	 * "#n_writes".  This brings the cacheline into the	 * L2 cache in "owned" state.	 */	__asm__ __volatile__("prefetch [%0], #n_writes"			     : /* no outputs */			     : "r" (x));} #define HAVE_ARCH_PICK_MMAP_LAYOUT int do_mathemu(struct pt_regs *regs, struct fpustate *f, bool illegal_insn_trap); #endif /* !(__ASSEMBLER__) */ #endif /* !(__ASM_SPARC64_PROCESSOR_H) */