/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2012 Regents of the University of California */ #ifndef _ASM_RISCV_PROCESSOR_H#define _ASM_RISCV_PROCESSOR_H #include <linux/const.h> #include <vdso/processor.h> #include <asm/ptrace.h> /* * This decides where the kernel will search for a free chunk of vm * space during mmap's. */#define TASK_UNMAPPED_BASE	PAGE_ALIGN(TASK_SIZE / 3) #define STACK_TOP		TASK_SIZE#define STACK_TOP_MAX		STACK_TOP#define STACK_ALIGN		16 #ifndef __ASSEMBLY__ struct task_struct;struct pt_regs; /* CPU-specific state of a task */struct thread_struct {	/* Callee-saved registers */	unsigned long ra;	unsigned long sp;	/* Kernel mode stack */	unsigned long s[12];	/* s[0]: frame pointer */	struct __riscv_d_ext_state fstate;	unsigned long bad_cause;}; #define INIT_THREAD {					\	.sp = sizeof(init_stack) + (long)&init_stack,	\} #define task_pt_regs(tsk)						\	((struct pt_regs *)(task_stack_page(tsk) + THREAD_SIZE		\			    - ALIGN(sizeof(struct pt_regs), STACK_ALIGN))) #define KSTK_EIP(tsk)		(task_pt_regs(tsk)->epc)#define KSTK_ESP(tsk)		(task_pt_regs(tsk)->sp)  /* Do necessary setup to start up a newly executed thread. */extern void start_thread(struct pt_regs *regs,			unsigned long pc, unsigned long sp); /* Free all resources held by a thread. */static inline void release_thread(struct task_struct *dead_task){} extern unsigned long get_wchan(struct task_struct *p);  static inline void wait_for_interrupt(void){	__asm__ __volatile__ ("wfi");} struct device_node;int riscv_of_processor_hartid(struct device_node *node);int riscv_of_parent_hartid(struct device_node *node); extern void riscv_fill_hwcap(void);extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); #endif /* __ASSEMBLY__ */ #endif /* _ASM_RISCV_PROCESSOR_H */