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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/tile/include/asm/smp.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/tile/include/asm/smp.h')
-rw-r--r-- | kernel/arch/tile/include/asm/smp.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/kernel/arch/tile/include/asm/smp.h b/kernel/arch/tile/include/asm/smp.h new file mode 100644 index 000000000..735e7f144 --- /dev/null +++ b/kernel/arch/tile/include/asm/smp.h @@ -0,0 +1,139 @@ +/* + * Copyright 2010 Tilera Corporation. All Rights Reserved. + * + * 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, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef _ASM_TILE_SMP_H +#define _ASM_TILE_SMP_H + +#ifdef CONFIG_SMP + +#include <asm/processor.h> +#include <linux/cpumask.h> +#include <linux/irqreturn.h> +#include <hv/hypervisor.h> + +/* Set up this tile to support receiving hypervisor messages */ +void init_messaging(void); + +/* Set up this tile to support receiving device interrupts and IPIs. */ +void init_per_tile_IRQs(void); + +/* Send a message to processors specified in mask */ +void send_IPI_many(const struct cpumask *mask, int tag); + +/* Send a message to all but the sending processor */ +void send_IPI_allbutself(int tag); + +/* Send a message to a specific processor */ +void send_IPI_single(int dest, int tag); + +/* Process an IPI message */ +void evaluate_message(int tag); + +/* Boot a secondary cpu */ +void online_secondary(void); + +/* Topology of the supervisor tile grid, and coordinates of boot processor */ +extern HV_Topology smp_topology; + +/* Accessors for grid size */ +#define smp_height (smp_topology.height) +#define smp_width (smp_topology.width) + +/* Convenience functions for converting cpu <-> coords. */ +static inline int cpu_x(int cpu) +{ + return cpu % smp_width; +} +static inline int cpu_y(int cpu) +{ + return cpu / smp_width; +} +static inline int xy_to_cpu(int x, int y) +{ + return y * smp_width + x; +} + +/* Hypervisor message tags sent via the tile send_IPI*() routines. */ +#define MSG_TAG_START_CPU 1 +#define MSG_TAG_STOP_CPU 2 +#define MSG_TAG_CALL_FUNCTION_MANY 3 +#define MSG_TAG_CALL_FUNCTION_SINGLE 4 +#define MSG_TAG_IRQ_WORK 5 + +/* Hook for the generic smp_call_function_many() routine. */ +static inline void arch_send_call_function_ipi_mask(struct cpumask *mask) +{ + send_IPI_many(mask, MSG_TAG_CALL_FUNCTION_MANY); +} + +/* Hook for the generic smp_call_function_single() routine. */ +static inline void arch_send_call_function_single_ipi(int cpu) +{ + send_IPI_single(cpu, MSG_TAG_CALL_FUNCTION_SINGLE); +} + +/* Print out the boot string describing which cpus were disabled. */ +void print_disabled_cpus(void); + +#else /* !CONFIG_SMP */ + +#define smp_master_cpu 0 +#define smp_height 1 +#define smp_width 1 +#define cpu_x(cpu) 0 +#define cpu_y(cpu) 0 +#define xy_to_cpu(x, y) 0 + +#endif /* !CONFIG_SMP */ + + +/* Which cpus may be used as the lotar in a page table entry. */ +extern struct cpumask cpu_lotar_map; +#define cpu_is_valid_lotar(cpu) cpumask_test_cpu((cpu), &cpu_lotar_map) + +/* Which processors are used for hash-for-home mapping */ +extern struct cpumask hash_for_home_map; + +/* Which cpus can have their cache flushed by hv_flush_remote(). */ +extern struct cpumask cpu_cacheable_map; +#define cpu_cacheable(cpu) cpumask_test_cpu((cpu), &cpu_cacheable_map) + +/* Convert an HV_LOTAR value into a cpu. */ +static inline int hv_lotar_to_cpu(HV_LOTAR lotar) +{ + return HV_LOTAR_X(lotar) + (HV_LOTAR_Y(lotar) * smp_width); +} + +/* + * Extension of <linux/cpumask.h> functionality when you just want + * to express a mask or suppression or inclusion region without + * being too concerned about exactly which cpus are valid in that region. + */ +int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits); + +#define cpulist_parse_crop(buf, dst) \ + __cpulist_parse_crop((buf), (dst), NR_CPUS) +static inline int __cpulist_parse_crop(const char *buf, struct cpumask *dstp, + int nbits) +{ + return bitmap_parselist_crop(buf, cpumask_bits(dstp), nbits); +} + +/* Initialize the IPI subsystem. */ +void ipi_init(void); + +/* Function for start-cpu message to cause us to jump to. */ +extern unsigned long start_cpu_function_addr; + +#endif /* _ASM_TILE_SMP_H */ |