/* 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;
|
};
|
|
#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);
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* _ASM_RISCV_PROCESSOR_H */
|
