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linux-sg2042/arch/mips/include/asm/smp.h

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
* Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
* Copyright (C) 2000, 2001, 2002 Ralf Baechle
* Copyright (C) 2000, 2001 Broadcom Corporation
*/
#ifndef __ASM_SMP_H
#define __ASM_SMP_H
#include <linux/bitops.h>
#include <linux/linkage.h>
MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. Some of the were relying into smp.h being dragged in by another header which of course is fragile. <asm/cpu-info.h> uses smp_processor_id() only in macros and including smp.h there leads to an include loop, so don't change cpu-info.h. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-06-19 21:05:26 +08:00
#include <linux/smp.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#include <linux/threads.h>
#include <linux/cpumask.h>
[MIPS] SMP: Call platform methods via ops structure. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-19 20:23:51 +08:00
atomic: use <linux/atomic.h> This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-27 07:09:06 +08:00
#include <linux/atomic.h>
[MIPS] SMP: Call platform methods via ops structure. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-19 20:23:51 +08:00
#include <asm/smp-ops.h>
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
[MIPS] MT: Scheduler support for SMT Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-03 04:42:04 +08:00
extern int smp_num_siblings;
extern cpumask_t cpu_sibling_map[];
MIPS: Support CPU topology files in sysfs This patch is prepared for Loongson's NUMA support, it offer meaningful sysfs files such as physical_package_id, core_id, core_siblings and thread_siblings in /sys/devices/system/cpu/cpu?/topology. Signed-off-by: Huacai Chen <chenhc@lemote.com> Reviewed-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/7184/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-06-26 11:41:26 +08:00
extern cpumask_t cpu_core_map[];
MIPS: c-r4k: Fix cache flushing for MT cores MT_SMP is not the only SMP option for MT cores. The MT_SMP option allows more than one VPE per core to appear as a secondary CPU in the system. Because of how CM works, it propagates the address-based cache ops to the secondary cores but not the index-based ones. Because of that, the code does not use IPIs to flush the L1 caches on secondary cores because the CM would have done that already. However, the CM functionality is independent of the type of SMP kernel so even in non-MT kernels, IPIs are not necessary. As a result of which, we change the conditional to depend on the CM presence. Moreover, since VPEs on the same core share the same L1 caches, there is no need to send an IPI on all of them so we calculate a suitable cpumask with only one VPE per core. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: <stable@vger.kernel.org> # 3.15+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10654/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-07-10 16:29:10 +08:00
extern cpumask_t cpu_foreign_map;
[MIPS] MT: Scheduler support for SMT Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-03 04:42:04 +08:00
[PATCH] smp_processor_id() cleanup This patch implements a number of smp_processor_id() cleanup ideas that Arjan van de Ven and I came up with. The previous __smp_processor_id/_smp_processor_id/smp_processor_id API spaghetti was hard to follow both on the implementational and on the usage side. Some of the complexity arose from picking wrong names, some of the complexity comes from the fact that not all architectures defined __smp_processor_id. In the new code, there are two externally visible symbols: - smp_processor_id(): debug variant. - raw_smp_processor_id(): nondebug variant. Replaces all existing uses of _smp_processor_id() and __smp_processor_id(). Defined by every SMP architecture in include/asm-*/smp.h. There is one new internal symbol, dependent on DEBUG_PREEMPT: - debug_smp_processor_id(): internal debug variant, mapped to smp_processor_id(). Also, i moved debug_smp_processor_id() from lib/kernel_lock.c into a new lib/smp_processor_id.c file. All related comments got updated and/or clarified. I have build/boot tested the following 8 .config combinations on x86: {SMP,UP} x {PREEMPT,!PREEMPT} x {DEBUG_PREEMPT,!DEBUG_PREEMPT} I have also build/boot tested x64 on UP/PREEMPT/DEBUG_PREEMPT. (Other architectures are untested, but should work just fine.) Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-22 08:14:34 +08:00
#define raw_smp_processor_id() (current_thread_info()->cpu)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* Map from cpu id to sequential logical cpu number. This will only
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 19:59:30 +08:00
not be idempotent when cpus failed to come on-line. */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
extern int __cpu_number_map[NR_CPUS];
#define cpu_number_map(cpu) __cpu_number_map[cpu]
/* The reverse map from sequential logical cpu number to cpu id. */
extern int __cpu_logical_map[NR_CPUS];
#define cpu_logical_map(cpu) __cpu_logical_map[cpu]
#define NO_PROC_ID (-1)
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 19:59:30 +08:00
#define SMP_RESCHEDULE_YOURSELF 0x1 /* XXX braindead */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#define SMP_CALL_FUNCTION 0x2
MIPS: Add SMP_ICACHE_FLUSH for the Cavium CPU family. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: Paul Gortmaker <Paul.Gortmaker@windriver.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-12-12 07:33:32 +08:00
/* Octeon - Tell another core to flush its icache */
#define SMP_ICACHE_FLUSH 0x4
MIPS: kdump: Add support [ralf@linux-mips.org: Original patch by Maxim Uvarov <muvarov@gmail.com> with plenty of further shining, polishing, debugging and testing by me.] Signed-off-by: Maxim Uvarov <muvarov@gmail.com> Cc: linux-mips@linux-mips.org Cc: kexec@lists.infradead.org Cc: horms@verge.net.au Patchwork: https://patchwork.linux-mips.org/patch/1025/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-12 00:14:58 +08:00
/* Used by kexec crashdump to save all cpu's state */
#define SMP_DUMP 0x8
MIPS: Loongson 3: Add CPU hotplug support Tips of Loongson's CPU hotplug: 1, To fully shutdown a core in Loongson 3, the target core should go to CKSEG1 and flush all L1 cache entries at first. Then, another core (usually Core 0) can safely disable the clock of the target core. So play_dead() call loongson3_play_dead() via CKSEG1 (both uncached and unmmaped). 2, The default clocksource of Loongson is MIPS. Since clock source is a global device, timekeeping need the CP0' Count registers of each core be synchronous. Thus, when a core is up, we use a SMP_ASK_C0COUNT IPI to ask Core-0's Count. Signed-off-by: Huacai Chen <chenhc@lemote.com> Signed-off-by: Hongliang Tao <taohl@lemote.com> Signed-off-by: Hua Yan <yanh@lemote.com> Tested-by: Alex Smith <alex.smith@imgtec.com> Reviewed-by: Alex Smith <alex.smith@imgtec.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com> Patchwork: https://patchwork.linux-mips.org/patch/6639 Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-21 18:44:09 +08:00
#define SMP_ASK_C0COUNT 0x10
MIPS: Add SMP_ICACHE_FLUSH for the Cavium CPU family. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: Paul Gortmaker <Paul.Gortmaker@windriver.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-12-12 07:33:32 +08:00
MIPS: SMP: Fix build error. CC arch/mips/kernel/smp.o arch/mips/kernel/smp.c: In function ‘start_secondary’: arch/mips/kernel/smp.c:149:2: error: passing argument 2 of ‘cpumask_set_cpu’ discards ‘volatile’ qualifier from pointer target type [-Werror] cpumask_set_cpu(cpu, &cpu_callin_map); ^ In file included from ./arch/mips/include/asm/processor.h:14:0, from ./arch/mips/include/asm/thread_info.h:15, from include/linux/thread_info.h:54, from include/asm-generic/preempt.h:4, from arch/mips/include/generated/asm/preempt.h:1, from include/linux/preempt.h:18, from include/linux/interrupt.h:8, from arch/mips/kernel/smp.c:24: include/linux/cpumask.h:272:91: note: expected ‘struct cpumask *’ but argument is of type ‘volatile struct cpumask_t *’ static inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp) ^ arch/mips/kernel/smp.c: In function ‘smp_prepare_boot_cpu’: arch/mips/kernel/smp.c:211:2: error: passing argument 2 of ‘cpumask_set_cpu’ discards ‘volatile’ qualifier from pointer target type [-Werror] cpumask_set_cpu(0, &cpu_callin_map); ^ In file included from ./arch/mips/include/asm/processor.h:14:0, from ./arch/mips/include/asm/thread_info.h:15, from include/linux/thread_info.h:54, from include/asm-generic/preempt.h:4, from arch/mips/include/generated/asm/preempt.h:1, from include/linux/preempt.h:18, from include/linux/interrupt.h:8, from arch/mips/kernel/smp.c:24: include/linux/cpumask.h:272:91: note: expected ‘struct cpumask *’ but argument is of type ‘volatile struct cpumask_t *’ static inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp) ^ arch/mips/kernel/smp.c: In function ‘__cpu_up’: arch/mips/kernel/smp.c:221:10: error: passing argument 2 of ‘cpumask_test_cpu’ discards ‘volatile’ qualifier from pointer target type [-Werror] while (!cpumask_test_cpu(cpu, &cpu_callin_map)) ^ In file included from ./arch/mips/include/asm/processor.h:14:0, from ./arch/mips/include/asm/thread_info.h:15, from include/linux/thread_info.h:54, from include/asm-generic/preempt.h:4, from arch/mips/include/generated/asm/preempt.h:1, from include/linux/preempt.h:18, from include/linux/interrupt.h:8, from arch/mips/kernel/smp.c:24: include/linux/cpumask.h:294:90: note: expected ‘const struct cpumask *’ but argument is of type ‘volatile struct cpumask_t *’ static inline int cpumask_test_cpu(int cpu, const struct cpumask *cpumask) ^ cc1: all warnings being treated as errors make[2]: *** [arch/mips/kernel/smp.o] Error 1 make[1]: *** [arch/mips/kernel] Error 2 make: *** [arch/mips] Error 2 Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-05-12 12:43:04 +08:00
extern cpumask_t cpu_callin_map;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
MIPS: introduce cpu_coherent_mask Add a mask of CPUs which are currently known to be operating coherently. This is setup initially to be all present CPUs, but in a subsequent patch CPUs in a MIPS Coherent Processing System will be cleared in this mask as they enter non-coherent idle states. This will be used in order to determine when a CPU within a CPS system may need to be powered back up, but may also be used in future to optimise away wakeups for cache operations or TLB invalidations. Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2014-02-15 00:30:52 +08:00
/* Mask of CPUs which are currently definitely operating coherently */
extern cpumask_t cpu_coherent_mask;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
extern void asmlinkage smp_bootstrap(void);
/*
* this function sends a 'reschedule' IPI to another CPU.
* it goes straight through and wastes no time serializing
* anything. Worst case is that we lose a reschedule ...
*/
static inline void smp_send_reschedule(int cpu)
{
[MIPS] SMP: Call platform methods via ops structure. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-19 20:23:51 +08:00
extern struct plat_smp_ops *mp_ops; /* private */
mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
MIPS: Add arch generic CPU hotplug Each platform has to add support for CPU hotplugging itself by providing suitable definitions for the cpu_disable and cpu_die of the smp_ops methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the necessary changes. This patch contains the changes to the dummy smp_ops definition for uni-processor systems. Parts of the code contributed by Cavium Inc. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-06-23 17:00:31 +08:00
#ifdef CONFIG_HOTPLUG_CPU
static inline int __cpu_disable(void)
{
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 19:59:30 +08:00
extern struct plat_smp_ops *mp_ops; /* private */
MIPS: Add arch generic CPU hotplug Each platform has to add support for CPU hotplugging itself by providing suitable definitions for the cpu_disable and cpu_die of the smp_ops methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the necessary changes. This patch contains the changes to the dummy smp_ops definition for uni-processor systems. Parts of the code contributed by Cavium Inc. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-06-23 17:00:31 +08:00
return mp_ops->cpu_disable();
}
static inline void __cpu_die(unsigned int cpu)
{
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 19:59:30 +08:00
extern struct plat_smp_ops *mp_ops; /* private */
MIPS: Add arch generic CPU hotplug Each platform has to add support for CPU hotplugging itself by providing suitable definitions for the cpu_disable and cpu_die of the smp_ops methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the necessary changes. This patch contains the changes to the dummy smp_ops definition for uni-processor systems. Parts of the code contributed by Cavium Inc. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-06-23 17:00:31 +08:00
mp_ops->cpu_die(cpu);
}
extern void play_dead(void);
#endif
MIPS: SMP: Inline arch_send_call_function_{single_ipi,ipi_mask} Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-25 22:35:28 +08:00
static inline void arch_send_call_function_single_ipi(int cpu)
{
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 19:59:30 +08:00
extern struct plat_smp_ops *mp_ops; /* private */
MIPS: SMP: Inline arch_send_call_function_{single_ipi,ipi_mask} Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-25 22:35:28 +08:00
mips: fix obsolete cpumask_of_cpu usage. Plus, it's weird. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2015-03-10 10:30:43 +08:00
mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
MIPS: SMP: Inline arch_send_call_function_{single_ipi,ipi_mask} Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-25 22:35:28 +08:00
}
static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
{
MIPS: Whitespace cleanup. Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-01-22 19:59:30 +08:00
extern struct plat_smp_ops *mp_ops; /* private */
MIPS: SMP: Inline arch_send_call_function_{single_ipi,ipi_mask} Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-25 22:35:28 +08:00
mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
}
mips: convert to generic helpers for IPI function calls This converts mips to use the new helpers for smp_call_function() and friends, and adds support for smp_call_function_single(). Not tested, but it compiles. mips shares the same IPI for smp_call_function() and smp_call_function_single(), since not all mips platforms have enough available IPIs to support seperate setups. Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-06-17 16:45:23 +08:00
MIPS: kdump: Add support [ralf@linux-mips.org: Original patch by Maxim Uvarov <muvarov@gmail.com> with plenty of further shining, polishing, debugging and testing by me.] Signed-off-by: Maxim Uvarov <muvarov@gmail.com> Cc: linux-mips@linux-mips.org Cc: kexec@lists.infradead.org Cc: horms@verge.net.au Patchwork: https://patchwork.linux-mips.org/patch/1025/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-10-12 00:14:58 +08:00
#if defined(CONFIG_KEXEC)
extern void (*dump_ipi_function_ptr)(void *);
void dump_send_ipi(void (*dump_ipi_callback)(void *));
#endif
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif /* __ASM_SMP_H */