diff options
Diffstat (limited to 'arch/arc/include/asm/smp.h')
| -rw-r--r-- | arch/arc/include/asm/smp.h | 58 |
1 files changed, 29 insertions, 29 deletions
diff --git a/arch/arc/include/asm/smp.h b/arch/arc/include/asm/smp.h index c4fb211dcd25..990f834909f0 100644 --- a/arch/arc/include/asm/smp.h +++ b/arch/arc/include/asm/smp.h @@ -1,9 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #ifndef __ASM_ARC_SMP_H @@ -30,40 +27,57 @@ extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); * APIs provided by arch SMP code to rest of arch code */ extern void __init smp_init_cpus(void); -extern void __init first_lines_of_secondary(void); +extern void first_lines_of_secondary(void); extern const char *arc_platform_smp_cpuinfo(void); +extern void arc_platform_smp_wait_to_boot(int); +extern void start_kernel_secondary(void); /* * API expected BY platform smp code (FROM arch smp code) * * smp_ipi_irq_setup: - * Takes @cpu and @irq to which the arch-common ISR is hooked up + * Takes @cpu and @hwirq to which the arch-common ISR is hooked up */ -extern int smp_ipi_irq_setup(int cpu, int irq); +extern int smp_ipi_irq_setup(int cpu, irq_hw_number_t hwirq); /* * struct plat_smp_ops - SMP callbacks provided by platform to ARC SMP * * @info: SoC SMP specific info for /proc/cpuinfo etc + * @init_early_smp: A SMP specific h/w block can init itself + * Could be common across platforms so not covered by + * mach_desc->init_early() + * @init_per_cpu: Called for each core so SMP h/w block driver can do + * any needed setup per cpu (e.g. IPI request) * @cpu_kick: For Master to kickstart a cpu (optionally at a PC) - * @ipi_send: To send IPI to a @cpumask - * @ips_clear: To clear IPI received by @cpu at @irq + * @ipi_send: To send IPI to a @cpu + * @ips_clear: To clear IPI received at @irq */ struct plat_smp_ops { const char *info; + void (*init_early_smp)(void); + void (*init_per_cpu)(int cpu); void (*cpu_kick)(int cpu, unsigned long pc); - void (*ipi_send)(void *callmap); - void (*ipi_clear)(int cpu, int irq); + void (*ipi_send)(int cpu); + void (*ipi_clear)(int irq); }; /* TBD: stop exporting it for direct population by platform */ extern struct plat_smp_ops plat_smp_ops; -#endif /* CONFIG_SMP */ +#else /* CONFIG_SMP */ + +static inline void smp_init_cpus(void) {} +static inline const char *arc_platform_smp_cpuinfo(void) +{ + return ""; +} + +#endif /* !CONFIG_SMP */ /* * ARC700 doesn't support atomic Read-Modify-Write ops. - * Originally Interrupts had to be disabled around code to gaurantee atomicity. + * Originally Interrupts had to be disabled around code to guarantee atomicity. * The LLOCK/SCOND insns allow writing interrupt-hassle-free based atomic ops * based on retry-if-irq-in-atomic (with hardware assist). * However despite these, we provide the IRQ disabling variant @@ -71,8 +85,8 @@ extern struct plat_smp_ops plat_smp_ops; * (1) These insn were introduced only in 4.10 release. So for older released * support needed. * - * (2) In a SMP setup, the LLOCK/SCOND atomiticity across CPUs needs to be - * gaurantted by the platform (not something which core handles). + * (2) In a SMP setup, the LLOCK/SCOND atomicity across CPUs needs to be + * guaranteed by the platform (not something which core handles). * Assuming a platform won't, SMP Linux needs to use spinlocks + local IRQ * disabling for atomicity. * @@ -93,7 +107,6 @@ extern struct plat_smp_ops plat_smp_ops; #include <asm/spinlock.h> extern arch_spinlock_t smp_atomic_ops_lock; -extern arch_spinlock_t smp_bitops_lock; #define atomic_ops_lock(flags) do { \ local_irq_save(flags); \ @@ -105,24 +118,11 @@ extern arch_spinlock_t smp_bitops_lock; local_irq_restore(flags); \ } while (0) -#define bitops_lock(flags) do { \ - local_irq_save(flags); \ - arch_spin_lock(&smp_bitops_lock); \ -} while (0) - -#define bitops_unlock(flags) do { \ - arch_spin_unlock(&smp_bitops_lock); \ - local_irq_restore(flags); \ -} while (0) - #else /* !CONFIG_SMP */ #define atomic_ops_lock(flags) local_irq_save(flags) #define atomic_ops_unlock(flags) local_irq_restore(flags) -#define bitops_lock(flags) local_irq_save(flags) -#define bitops_unlock(flags) local_irq_restore(flags) - #endif /* !CONFIG_SMP */ #endif /* !CONFIG_ARC_HAS_LLSC */ |