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linux-stable-rt/include/asm-sparc64/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
/* smp.h: Sparc64 specific SMP stuff.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef _SPARC64_SMP_H
#define _SPARC64_SMP_H
#include <linux/threads.h>
#include <asm/asi.h>
#include <asm/starfire.h>
#include <asm/spitfire.h>
#ifndef __ASSEMBLY__
#include <linux/cpumask.h>
#include <linux/cache.h>
#endif /* !(__ASSEMBLY__) */
#ifdef CONFIG_SMP
#ifndef __ASSEMBLY__
/*
* Private routines/data
*/
#include <asm/bitops.h>
#include <asm/atomic.h>
extern cpumask_t phys_cpu_present_map;
#define cpu_possible_map phys_cpu_present_map
[SPARC64]: Add SMT scheduling support for Niagara. The mapping is a simple "(cpuid >> 2) == core" for now. Later we'll add more sophisticated code that will walk the sun4v machine description and figure this out from there. We should also add core mappings for jaguar and panther processors. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-09 08:09:19 +08:00
extern cpumask_t cpu_sibling_map[NR_CPUS];
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
/*
* General functions that each host system must provide.
*/
[SPARC64]: Refine code sequences to get the cpu id. On uniprocessor, it's always zero for optimize that. On SMP, the jmpl to the stub kills the return address stack in the cpu branch prediction logic, so expand the code sequence inline and use a code patching section to fix things up. This also always better and explicit register selection, which will be taken advantage of in a future changeset. The hard_smp_processor_id() function is big, so do not inline it. Fix up tests for Jalapeno to also test for Serrano chips too. These tests want "jbus Ultra-IIIi" cases to match, so that is what we should test for. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-27 15:27:19 +08:00
extern int hard_smp_processor_id(void);
[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
[SPARC64]: Make cpu_present_map available earlier. The change to kernel/sched.c's init code to use for_each_cpu() requires that the cpu_possible_map be setup much earlier. Set it up via setup_arch(), constrained to NR_CPUS, and later constrain it to max_cpus in smp_prepare_cpus(). This fixes SMP booting on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-26 05:39:56 +08:00
extern void smp_setup_cpu_possible_map(void);
[SPARC64]: Unify timer interrupt handler. Things were scattered all over the place, split between SMP and non-SMP. Unify it all so that dyntick support is easier to add. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-22 22:24:10 +08:00
extern unsigned char boot_cpu_id;
[SPARC64]: Make cpu_present_map available earlier. The change to kernel/sched.c's init code to use for_each_cpu() requires that the cpu_possible_map be setup much earlier. Set it up via setup_arch(), constrained to NR_CPUS, and later constrain it to max_cpus in smp_prepare_cpus(). This fixes SMP booting on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-26 05:39:56 +08:00
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 /* !(__ASSEMBLY__) */
[SPARC64]: Make cpu_present_map available earlier. The change to kernel/sched.c's init code to use for_each_cpu() requires that the cpu_possible_map be setup much earlier. Set it up via setup_arch(), constrained to NR_CPUS, and later constrain it to max_cpus in smp_prepare_cpus(). This fixes SMP booting on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-26 05:39:56 +08:00
#else
Remove hardcoding of hard_smp_processor_id on UP systems With the advent of kdump, the assumption that the boot CPU when booting an UP kernel is always the CPU with a particular hardware ID (often 0) (usually referred to as BSP on some architectures) is not valid anymore. The reason being that the dump capture kernel boots on the crashed CPU (the CPU that invoked crash_kexec), which may be or may not be that particular CPU. Move definition of hard_smp_processor_id for the UP case to architecture-specific code ("asm/smp.h") where it belongs, so that each architecture can provide its own implementation. Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Acked-by: Andi Kleen <ak@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09 17:33:25 +08:00
#define hard_smp_processor_id() 0
[SPARC64]: Make cpu_present_map available earlier. The change to kernel/sched.c's init code to use for_each_cpu() requires that the cpu_possible_map be setup much earlier. Set it up via setup_arch(), constrained to NR_CPUS, and later constrain it to max_cpus in smp_prepare_cpus(). This fixes SMP booting on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-26 05:39:56 +08:00
#define smp_setup_cpu_possible_map() do { } while (0)
[SPARC64]: Unify timer interrupt handler. Things were scattered all over the place, split between SMP and non-SMP. Unify it all so that dyntick support is easier to add. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-02-22 22:24:10 +08:00
#define boot_cpu_id (0)
[SPARC64]: Make cpu_present_map available earlier. The change to kernel/sched.c's init code to use for_each_cpu() requires that the cpu_possible_map be setup much earlier. Set it up via setup_arch(), constrained to NR_CPUS, and later constrain it to max_cpus in smp_prepare_cpus(). This fixes SMP booting on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-26 05:39:56 +08:00
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 /* !(CONFIG_SMP) */
#endif /* !(_SPARC64_SMP_H) */