diff options
Diffstat (limited to 'arch/alpha/include/asm/smp.h')
| -rw-r--r-- | arch/alpha/include/asm/smp.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/smp.h b/arch/alpha/include/asm/smp.h new file mode 100644 index 0000000000..2264ae7267 --- /dev/null +++ b/arch/alpha/include/asm/smp.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SMP_H +#define __ASM_SMP_H + +#include <linux/threads.h> +#include <linux/cpumask.h> +#include <linux/bitops.h> +#include <asm/pal.h> + +/* HACK: Cabrio WHAMI return value is bogus if more than 8 bits used.. :-( */ + +static __inline__ unsigned char +__hard_smp_processor_id(void) +{ + register unsigned char __r0 __asm__("$0"); + __asm__ __volatile__( + "call_pal %1 #whami" + : "=r"(__r0) + :"i" (PAL_whami) + : "$1", "$22", "$23", "$24", "$25"); + return __r0; +} + +#ifdef CONFIG_SMP + +#include <asm/irq.h> + +struct cpuinfo_alpha { + unsigned long loops_per_jiffy; + unsigned long last_asn; + int need_new_asn; + int asn_lock; + unsigned long ipi_count; + unsigned long prof_multiplier; + unsigned long prof_counter; + unsigned char mcheck_expected; + unsigned char mcheck_taken; + unsigned char mcheck_extra; +} __attribute__((aligned(64))); + +extern struct cpuinfo_alpha cpu_data[NR_CPUS]; + +#define hard_smp_processor_id() __hard_smp_processor_id() +#define raw_smp_processor_id() (current_thread_info()->cpu) + +extern int smp_num_cpus; + +extern void arch_send_call_function_single_ipi(int cpu); +extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); + +#else /* CONFIG_SMP */ + +#define hard_smp_processor_id() 0 +#define smp_call_function_on_cpu(func,info,wait,cpu) ({ 0; }) + +#endif /* CONFIG_SMP */ + +#define NO_PROC_ID (-1) + +#endif |