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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/ia64/include/asm/smp.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/ia64/include/asm/smp.h')
-rw-r--r-- | arch/ia64/include/asm/smp.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/smp.h b/arch/ia64/include/asm/smp.h new file mode 100644 index 000000000..aa92234c0 --- /dev/null +++ b/arch/ia64/include/asm/smp.h @@ -0,0 +1,103 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * SMP Support + * + * Copyright (C) 1999 VA Linux Systems + * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> + * (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P. + * David Mosberger-Tang <davidm@hpl.hp.com> + * Bjorn Helgaas <bjorn.helgaas@hp.com> + */ +#ifndef _ASM_IA64_SMP_H +#define _ASM_IA64_SMP_H + +#include <linux/init.h> +#include <linux/threads.h> +#include <linux/kernel.h> +#include <linux/cpumask.h> +#include <linux/bitops.h> +#include <linux/irqreturn.h> + +#include <asm/param.h> +#include <asm/processor.h> +#include <asm/ptrace.h> + +static inline unsigned int +ia64_get_lid (void) +{ + union { + struct { + unsigned long reserved : 16; + unsigned long eid : 8; + unsigned long id : 8; + unsigned long ignored : 32; + } f; + unsigned long bits; + } lid; + + lid.bits = ia64_getreg(_IA64_REG_CR_LID); + return lid.f.id << 8 | lid.f.eid; +} + +#define hard_smp_processor_id() ia64_get_lid() + +#ifdef CONFIG_SMP + +#define raw_smp_processor_id() (current_thread_info()->cpu) + +extern struct smp_boot_data { + int cpu_count; + int cpu_phys_id[NR_CPUS]; +} smp_boot_data __initdata; + +extern char no_int_routing; + +extern cpumask_t cpu_core_map[NR_CPUS]; +DECLARE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map); +extern int smp_num_siblings; +extern void __iomem *ipi_base_addr; + +extern volatile int ia64_cpu_to_sapicid[]; +#define cpu_physical_id(i) ia64_cpu_to_sapicid[i] + +extern unsigned long ap_wakeup_vector; + +/* + * Function to map hard smp processor id to logical id. Slow, so don't use this in + * performance-critical code. + */ +static inline int +cpu_logical_id (int cpuid) +{ + int i; + + for (i = 0; i < NR_CPUS; ++i) + if (cpu_physical_id(i) == cpuid) + break; + return i; +} + +/* Upping and downing of CPUs */ +extern int __cpu_disable (void); +extern void __cpu_die (unsigned int cpu); +extern void cpu_die (void) __attribute__ ((noreturn)); +extern void __init smp_build_cpu_map(void); + +extern void __init init_smp_config (void); +extern void smp_do_timer (struct pt_regs *regs); + +extern irqreturn_t handle_IPI(int irq, void *dev_id); +extern void smp_send_reschedule (int cpu); +extern void identify_siblings (struct cpuinfo_ia64 *); +extern int is_multithreading_enabled(void); + +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 cpu_logical_id(i) 0 +#define cpu_physical_id(i) ia64_get_lid() + +#endif /* CONFIG_SMP */ +#endif /* _ASM_IA64_SMP_H */ |