9e12630d75
- apic_send_ipi() to send inter-processor interrupts (IPIs) - APIC IPI schedule and halt handlers to signal x-cpu that a cpu shold reschedule or halt - various little changes to let APs run - no processes are scheduled at the APs and therefore they are idle except being interrupted by a timer time to time
28 lines
533 B
C
28 lines
533 B
C
#include "smp.h"
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unsigned ncpus;
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unsigned ht_per_core;
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unsigned bsp_cpu_id;
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struct cpu cpus[CONFIG_MAX_CPUS];
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static volatile unsigned ap_cpus_booted;
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SPINLOCK_DEFINE(big_kernel_lock)
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SPINLOCK_DEFINE(boot_lock)
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void wait_for_APs_to_finish_booting(void)
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{
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/* we must let the other CPUs to run in kernel mode first */
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BKL_UNLOCK();
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while (ap_cpus_booted != (ncpus - 1))
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arch_pause();
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/* now we have to take the lock again as we continu execution */
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BKL_LOCK();
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}
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void ap_boot_finished(unsigned cpu)
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{
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ap_cpus_booted++;
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}
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