diff options
Diffstat (limited to 'arch/riscv/include/asm/smp.h')
| -rw-r--r-- | arch/riscv/include/asm/smp.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h new file mode 100644 index 000000000..360168454 --- /dev/null +++ b/arch/riscv/include/asm/smp.h @@ -0,0 +1,46 @@ +/* + * 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> + +#ifdef CONFIG_SMP + +/* SMP initialization hook for setup_arch */ +void __init setup_smp(void); + +/* Hook for the generic smp_call_function_many() routine. */ +void arch_send_call_function_ipi_mask(struct cpumask *mask); + +/* Hook for the generic smp_call_function_single() routine. */ +void arch_send_call_function_single_ipi(int cpu); + +/* + * 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. + */ +#define raw_smp_processor_id() (*((int*)((char*)get_current() + TASK_TI_CPU))) + +#endif /* CONFIG_SMP */ + +#endif /* _ASM_RISCV_SMP_H */ |