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* CPUs can now be disabled - that is, they will keep idling.

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* Added syscalls _kern_set_cpu_enabled() and _kern_cpu_enabled().
* scheduler.c::sRunQueue::tail was not maintained at all; changed sRunQueue to
  be a simple thread pointer instead of a struct thread_queue.
* Turns out we're monitoring CPU activity incorrectly when we've got more
  than one CPU.
* Renamed the global CPU array from "cpu" to gCPU.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16186 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2006-02-01 16:09:05 +00:00
parent 0f11a95a97
commit df213cedbc
6 changed files with 100 additions and 34 deletions
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headers/private/kernel/cpu.h
+6 -3
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2005, Haiku Inc. All rights reserved.
* Copyright 2002-2006, Haiku Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*
* Copyright 2002, Travis Geiselbrecht. All rights reserved.
@@ -23,11 +23,12 @@ typedef union cpu_ent {
// thread.c: used to force a reschedule at quantum expiration time
int preempted;
timer quantum_timer;
bool disabled;
} info;
} cpu_ent __attribute__((aligned(64)));
extern cpu_ent cpu[MAX_BOOT_CPUS];
extern cpu_ent gCPU[MAX_BOOT_CPUS];
#ifdef __cplusplus
@@ -40,9 +41,11 @@ status_t cpu_init_post_vm(struct kernel_args *args);
status_t cpu_init_post_modules(struct kernel_args *args);
cpu_ent *get_cpu_struct(void);
extern inline cpu_ent *get_cpu_struct(void) { return &cpu[smp_get_current_cpu()]; }
extern inline cpu_ent *get_cpu_struct(void) { return &gCPU[smp_get_current_cpu()]; }
void _user_clear_caches(void *address, size_t length, uint32 flags);
bool _user_cpu_enabled(int32 cpu);
status_t _user_set_cpu_enabled(int32 cpu, bool enabled);
#ifdef __cplusplus
}