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/
usr/
src/
linux-headers-3.0.0-14/
arch/
tile/
include/
asm/
- drwxr-xr-x
|
Viewing file:  smp.h (4.28 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* 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);
/* Call a function on a specified set of CPUs (may include this one). */
extern void on_each_cpu_mask(const struct cpumask *mask,
void (*func)(void *), void *info, bool wait);
/* 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
/* 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 on_each_cpu_mask(mask, func, info, wait) \
do { if (cpumask_test_cpu(0, (mask))) func(info); } while (0)
#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)
#if CHIP_HAS_CBOX_HOME_MAP()
/* Which processors are used for hash-for-home mapping */
extern struct cpumask hash_for_home_map;
#endif
/* 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 */
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