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- /* 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
- #ifdef CONFIG_64BIT
- #define STACK_TOP_MAX TASK_SIZE_64
- #else
- #define STACK_TOP_MAX STACK_TOP
- #endif
- #define STACK_ALIGN 16
- #ifndef __ASSEMBLY__
- struct task_struct;
- struct pt_regs;
- #ifdef CONFIG_VECTOR_EMU
- struct vsetvl_info {
- unsigned long last_vector_pc;
- unsigned long regid;
- unsigned long vl;
- unsigned long vtype;
- };
- #endif
- /* 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;
- struct __riscv_v_state vstate;
- #ifdef CONFIG_VECTOR_EMU
- struct vsetvl_info vsetvl_state;
- #endif
- };
- #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);
- #ifdef CONFIG_COMPAT
- #define DEFAULT_MAP_WINDOW_64 TASK_SIZE_64
- #else
- #define DEFAULT_MAP_WINDOW_64 TASK_SIZE
- #endif
- /* 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 */
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