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