David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2012 Regents of the University of California |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #ifndef _ASM_RISCV_SMP_H |
| 7 | #define _ASM_RISCV_SMP_H |
| 8 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 9 | #include <linux/cpumask.h> |
| 10 | #include <linux/irqreturn.h> |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 11 | #include <linux/thread_info.h> |
| 12 | |
| 13 | #define INVALID_HARTID ULONG_MAX |
| 14 | |
| 15 | struct seq_file; |
| 16 | extern unsigned long boot_cpu_hartid; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 17 | |
| 18 | #ifdef CONFIG_SMP |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 19 | /* |
| 20 | * Mapping between linux logical cpu index and hartid. |
| 21 | */ |
| 22 | extern unsigned long __cpuid_to_hartid_map[NR_CPUS]; |
| 23 | #define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu] |
| 24 | |
| 25 | /* print IPI stats */ |
| 26 | void show_ipi_stats(struct seq_file *p, int prec); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 27 | |
| 28 | /* SMP initialization hook for setup_arch */ |
| 29 | void __init setup_smp(void); |
| 30 | |
| 31 | /* Hook for the generic smp_call_function_many() routine. */ |
| 32 | void arch_send_call_function_ipi_mask(struct cpumask *mask); |
| 33 | |
| 34 | /* Hook for the generic smp_call_function_single() routine. */ |
| 35 | void arch_send_call_function_single_ipi(int cpu); |
| 36 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 37 | int riscv_hartid_to_cpuid(int hartid); |
| 38 | void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); |
| 39 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 40 | /* |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 41 | * Obtains the hart ID of the currently executing task. This relies on |
| 42 | * THREAD_INFO_IN_TASK, but we define that unconditionally. |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 43 | */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 44 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
| 45 | |
| 46 | #else |
| 47 | |
| 48 | static inline void show_ipi_stats(struct seq_file *p, int prec) |
| 49 | { |
| 50 | } |
| 51 | |
| 52 | static inline int riscv_hartid_to_cpuid(int hartid) |
| 53 | { |
| 54 | if (hartid == boot_cpu_hartid) |
| 55 | return 0; |
| 56 | |
| 57 | return -1; |
| 58 | } |
| 59 | static inline unsigned long cpuid_to_hartid_map(int cpu) |
| 60 | { |
| 61 | return boot_cpu_hartid; |
| 62 | } |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 63 | |
| 64 | #endif /* CONFIG_SMP */ |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 65 | #endif /* _ASM_RISCV_SMP_H */ |