badc7b674e
the new cpuid stuff was apparently exacerbating an existing problem where various bits of low level cpu code (specifically get_current_cpu) weren't really initialized before being used. Changed the order to set up a fake set of threads to point each cpu at really early in boot to make sure that at all points in code it can get the current 'thread' and thus the current cpu. A probably better solution would be to have dr3 point to the current cpu which would then point to the current thread, but that has a race condition that would require an int disable, etc. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20160 a95241bf-73f2-0310-859d-f6bbb57e9c96
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* Copyright 2002-2006, Haiku Inc. All rights reserved.
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* Distributed under the terms of the MIT License.
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*
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* Copyright 2002, Travis Geiselbrecht. All rights reserved.
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* Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_CPU_H
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#define _KERNEL_CPU_H
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#include <smp.h>
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#include <timer.h>
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#include <boot/kernel_args.h>
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#include <arch/cpu.h>
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/* CPU local data structure */
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typedef struct cpu_ent {
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int cpu_num;
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// thread.c: used to force a reschedule at quantum expiration time
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int preempted;
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timer quantum_timer;
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// keeping track of CPU activity
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bigtime_t active_time;
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bigtime_t last_kernel_time;
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bigtime_t last_user_time;
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bool disabled;
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// arch-specific stuff
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arch_cpu_info arch;
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} cpu_ent __attribute__((aligned(64)));
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extern cpu_ent gCPU[MAX_BOOT_CPUS];
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#ifdef __cplusplus
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extern "C" {
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#endif
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status_t cpu_preboot_init_percpu(struct kernel_args *args, int curr_cpu);
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status_t cpu_init(struct kernel_args *args);
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status_t cpu_init_percpu(kernel_args *ka, int curr_cpu);
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status_t cpu_init_post_vm(struct kernel_args *args);
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status_t cpu_init_post_modules(struct kernel_args *args);
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bigtime_t cpu_get_active_time(int32 cpu);
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cpu_ent *get_cpu_struct(void);
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extern inline cpu_ent *get_cpu_struct(void) { return &gCPU[smp_get_current_cpu()]; }
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void _user_clear_caches(void *address, size_t length, uint32 flags);
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bool _user_cpu_enabled(int32 cpu);
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status_t _user_set_cpu_enabled(int32 cpu, bool enabled);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_CPU_H */
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