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/*
 * 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 */

Filemanager

Name Type Size Permission Actions
Kbuild File 439 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 5.14 KB 0644
atomic_32.h File 8.91 KB 0644
atomic_64.h File 5.51 KB 0644
backtrace.h File 3.98 KB 0644
barrier.h File 2.89 KB 0644
bitops.h File 2.37 KB 0644
bitops_32.h File 4.01 KB 0644
bitops_64.h File 2.67 KB 0644
cache.h File 2.6 KB 0644
cacheflush.h File 4.94 KB 0644
checksum.h File 1.23 KB 0644
cmpxchg.h File 3.47 KB 0644
compat.h File 7.38 KB 0644
current.h File 947 B 0644
delay.h File 1.1 KB 0644
device.h File 978 B 0644
div64.h File 319 B 0644
dma-mapping.h File 1.82 KB 0644
dma.h File 762 B 0644
elf.h File 5.42 KB 0644
fixmap.h File 2.73 KB 0644
ftrace.h File 1.08 KB 0644
futex.h File 4.23 KB 0644
hardirq.h File 1.28 KB 0644
hardwall.h File 1.08 KB 0644
highmem.h File 2.08 KB 0644
homecache.h File 4.21 KB 0644
hugetlb.h File 3.04 KB 0644
hv_driver.h File 1.92 KB 0644
ide.h File 758 B 0644
insn.h File 1.79 KB 0644
io.h File 12.43 KB 0644
irq.h File 3.11 KB 0644
irq_work.h File 283 B 0644
irqflags.h File 10.55 KB 0644
jump_label.h File 1.47 KB 0644
kdebug.h File 769 B 0644
kexec.h File 2.23 KB 0644
kgdb.h File 1.99 KB 0644
kmap_types.h File 1.02 KB 0644
kprobes.h File 2.19 KB 0644
linkage.h File 1.46 KB 0644
mmu.h File 965 B 0644
mmu_context.h File 4.5 KB 0644
mmzone.h File 2.07 KB 0644
module.h File 1.12 KB 0644
page.h File 10.32 KB 0644
pci.h File 6.58 KB 0644
percpu.h File 1.79 KB 0644
perf_event.h File 766 B 0644
pgalloc.h File 4.76 KB 0644
pgtable.h File 15.66 KB 0644
pgtable_32.h File 4.08 KB 0644
pgtable_64.h File 5.11 KB 0644
pmc.h File 2.15 KB 0644
processor.h File 10.62 KB 0644
ptrace.h File 2.96 KB 0644
sections.h File 1.37 KB 0644
setup.h File 1.63 KB 0644
sigframe.h File 956 B 0644
signal.h File 1.07 KB 0644
smp.h File 3.98 KB 0644
spinlock.h File 741 B 0644
spinlock_32.h File 2.9 KB 0644
spinlock_64.h File 3.88 KB 0644
spinlock_types.h File 1.58 KB 0644
stack.h File 2.59 KB 0644
string.h File 1.19 KB 0644
switch_to.h File 2.75 KB 0644
syscall.h File 2.88 KB 0644
syscalls.h File 2.35 KB 0644
thread_info.h File 5.54 KB 0644
tile-desc.h File 650 B 0644
tile-desc_32.h File 12.54 KB 0644
tile-desc_64.h File 10.83 KB 0644
timex.h File 1.71 KB 0644
tlb.h File 878 B 0644
tlbflush.h File 3.99 KB 0644
topology.h File 1.52 KB 0644
traps.h File 2.44 KB 0644
uaccess.h File 12.77 KB 0644
unaligned.h File 1.56 KB 0644
unistd.h File 777 B 0644
user.h File 717 B 0644
vdso.h File 1.84 KB 0644
vga.h File 1.05 KB 0644
word-at-a-time.h File 1.07 KB 0644