linux/arch/riscv/kernel/head.h
Guo Ren f0bddf5058
riscv: entry: Convert to generic entry
This patch converts riscv to use the generic entry infrastructure from
kernel/entry/*. The generic entry makes maintainers' work easier and
codes more elegant. Here are the changes:

 - More clear entry.S with handle_exception and ret_from_exception
 - Get rid of complex custom signal implementation
 - Move syscall procedure from assembly to C, which is much more
   readable.
 - Connect ret_from_fork & ret_from_kernel_thread to generic entry.
 - Wrap with irqentry_enter/exit and syscall_enter/exit_from_user_mode
 - Use the standard preemption code instead of custom

Suggested-by: Huacai Chen <chenhuacai@kernel.org>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Tested-by: Yipeng Zou <zouyipeng@huawei.com>
Tested-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Cc: Ben Hutchings <ben@decadent.org.uk>
Link: https://lore.kernel.org/r/20230222033021.983168-5-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2023-03-23 08:47:00 -07:00

24 lines
490 B
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 SiFive, Inc.
*/
#ifndef __ASM_HEAD_H
#define __ASM_HEAD_H
#include <linux/linkage.h>
#include <linux/init.h>
extern atomic_t hart_lottery;
asmlinkage void __init setup_vm(uintptr_t dtb_pa);
#ifdef CONFIG_XIP_KERNEL
asmlinkage void __init __copy_data(void);
#endif
#ifdef CONFIG_RISCV_BOOT_SPINWAIT
extern void *__cpu_spinwait_stack_pointer[];
extern void *__cpu_spinwait_task_pointer[];
#endif
#endif /* __ASM_HEAD_H */