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Rev 3022 Rev 4055
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#include <cpu.h>
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#include <cpu.h>
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#include <proc/task.h>
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#include <proc/task.h>
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#include <proc/thread.h>
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#include <proc/thread.h>
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#include <arch.h>
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#include <arch.h>
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#include <arch/context.h>   /* SP_DELTA */
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#include <arch/context.h>   /* SP_DELTA */
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#include <arch/debugger.h>
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#include <arch/pm.h>
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#include <arch/pm.h>
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#include <arch/asm.h>
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#include <arch/asm.h>
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#include <arch/ddi/ddi.h>
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#include <arch/ddi/ddi.h>
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/** Perform ia32 specific tasks needed before the new task is run.
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/** Perform ia32 specific tasks needed before the new task is run.
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 *
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 *
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 * THREAD is locked and interrupts are disabled.
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 * THREAD is locked and interrupts are disabled.
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 */
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 */
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void before_thread_runs_arch(void)
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void before_thread_runs_arch(void)
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{
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{
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    CPU->arch.tss->esp0 = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
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    uintptr_t kstk = (uintptr_t) &THREAD->kstack[THREAD_STACK_SIZE -
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        SP_DELTA];
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        SP_DELTA];
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    /* Set kernel stack for CP3 -> CPL0 switch via SYSENTER */
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    write_msr(IA32_MSR_SYSENTER_ESP, kstk);
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    /* Set kernel stack for CPL3 -> CPL0 switch via interrupt */
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    CPU->arch.tss->esp0 = kstk;
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    CPU->arch.tss->ss0 = selector(KDATA_DES);
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    CPU->arch.tss->ss0 = selector(KDATA_DES);
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    /* Set up TLS in GS register */
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    /* Set up TLS in GS register */
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    set_tls_desc(THREAD->arch.tls);
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    set_tls_desc(THREAD->arch.tls);
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#ifdef CONFIG_DEBUG_AS_WATCHPOINT
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    /* Set watchpoint on AS to ensure that nobody sets it to zero */
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    if (CPU->id < BKPOINTS_MAX) {
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        the_t *the = THE;
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        breakpoint_add(&((the_t *) the->thread->kstack)->as,
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            BKPOINT_WRITE | BKPOINT_CHECK_ZERO, the->cpu->id);
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    }
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#endif
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}
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}
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void after_thread_ran_arch(void)
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void after_thread_ran_arch(void)
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{
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{
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}
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}