From 9999e48639b3cecb08ffb37358bcba3b48161b29 Mon Sep 17 00:00:00 2001 From: hc <hc@nodka.com> Date: Fri, 10 May 2024 08:50:17 +0000 Subject: [PATCH] add ax88772_rst --- kernel/arch/riscv/include/asm/smp.h | 106 +++++++++++++++++++++++++++++++++++++++++++--------- 1 files changed, 87 insertions(+), 19 deletions(-) diff --git a/kernel/arch/riscv/include/asm/smp.h b/kernel/arch/riscv/include/asm/smp.h index 3601684..df1f7c4 100644 --- a/kernel/arch/riscv/include/asm/smp.h +++ b/kernel/arch/riscv/include/asm/smp.h @@ -1,31 +1,40 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012 Regents of the University of California - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #ifndef _ASM_RISCV_SMP_H #define _ASM_RISCV_SMP_H -/* This both needs asm-offsets.h and is used when generating it. */ -#ifndef GENERATING_ASM_OFFSETS -#include <asm/asm-offsets.h> -#endif - #include <linux/cpumask.h> #include <linux/irqreturn.h> +#include <linux/thread_info.h> + +#define INVALID_HARTID ULONG_MAX + +struct seq_file; +extern unsigned long boot_cpu_hartid; + +struct riscv_ipi_ops { + void (*ipi_inject)(const struct cpumask *target); + void (*ipi_clear)(void); +}; #ifdef CONFIG_SMP +/* + * Mapping between linux logical cpu index and hartid. + */ +extern unsigned long __cpuid_to_hartid_map[NR_CPUS]; +#define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu] + +/* print IPI stats */ +void show_ipi_stats(struct seq_file *p, int prec); /* SMP initialization hook for setup_arch */ void __init setup_smp(void); + +/* Called from C code, this handles an IPI. */ +void handle_IPI(struct pt_regs *regs); /* Hook for the generic smp_call_function_many() routine. */ void arch_send_call_function_ipi_mask(struct cpumask *mask); @@ -33,14 +42,73 @@ /* Hook for the generic smp_call_function_single() routine. */ void arch_send_call_function_single_ipi(int cpu); +int riscv_hartid_to_cpuid(int hartid); +void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); + +/* Set custom IPI operations */ +void riscv_set_ipi_ops(struct riscv_ipi_ops *ops); + +/* Clear IPI for current CPU */ +void riscv_clear_ipi(void); + +/* Secondary hart entry */ +asmlinkage void smp_callin(void); + /* - * This is particularly ugly: it appears we can't actually get the definition - * of task_struct here, but we need access to the CPU this task is running on. - * Instead of using C we're using asm-offsets.h to get the current processor - * ID. + * Obtains the hart ID of the currently executing task. This relies on + * THREAD_INFO_IN_TASK, but we define that unconditionally. */ -#define raw_smp_processor_id() (*((int*)((char*)get_current() + TASK_TI_CPU))) +#define raw_smp_processor_id() (current_thread_info()->cpu) + +#if defined CONFIG_HOTPLUG_CPU +int __cpu_disable(void); +void __cpu_die(unsigned int cpu); +void cpu_stop(void); +#else +#endif /* CONFIG_HOTPLUG_CPU */ + +#else + +static inline void show_ipi_stats(struct seq_file *p, int prec) +{ +} + +static inline int riscv_hartid_to_cpuid(int hartid) +{ + if (hartid == boot_cpu_hartid) + return 0; + + return -1; +} +static inline unsigned long cpuid_to_hartid_map(int cpu) +{ + return boot_cpu_hartid; +} + +static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in, + struct cpumask *out) +{ + cpumask_clear(out); + cpumask_set_cpu(boot_cpu_hartid, out); +} + +static inline void riscv_set_ipi_ops(struct riscv_ipi_ops *ops) +{ +} + +static inline void riscv_clear_ipi(void) +{ +} #endif /* CONFIG_SMP */ +#if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP) +bool cpu_has_hotplug(unsigned int cpu); +#else +static inline bool cpu_has_hotplug(unsigned int cpu) +{ + return false; +} +#endif + #endif /* _ASM_RISCV_SMP_H */ -- Gitblit v1.6.2