WebSVN – HelenOS-historic – Diff – //kernel/trunk/arch/sparc64/src/proc/scheduler.c



}
 
/** Ensure that thread's kernel stack is locked in TLB. */
void before_thread_runs_arch(void)
{
    uintptr_t base;
   
    base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
 
    if ((uintptr_t) THREAD->kstack < base || (uintptr_t) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
        /*
         * Kernel stack of this thread is not locked in DTLB.
         * First, make sure it is not mapped already.
         * If not, create a locked mapping for it.
         */
         dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) THREAD->kstack);
         dtlb_insert_mapping((uintptr_t) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);
    }  
}
 
/** Unlock thread's stack from TLB, if necessary. */
void after_thread_ran_arch(void)
{
    uintptr_t base;
 
    base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
 
    if ((uintptr_t) THREAD->kstack < base || (uintptr_t) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
        /*
         * Kernel stack of this thread is locked in DTLB.
         * Destroy the mapping.
         */
        dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) THREAD->kstack);
    }
}
 
 /** @}
 */

Subversion Repositories HelenOS-historic

(root)//kernel/trunk/arch/sparc64/src/proc/scheduler.c – Rev 1705 → 1780

Rev 1705		Rev 1780
Line 46...		Line 46...
46	}	46	}
47		47
48	/** Ensure that thread's kernel stack is locked in TLB. */	48	/** Ensure that thread's kernel stack is locked in TLB. */
49	void before_thread_runs_arch(void)	49	void before_thread_runs_arch(void)
50	{	50	{
51	__address base;	51	uintptr_t base;
52		52
53	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);	53	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
54		54
55	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {	55	if ((uintptr_t) THREAD->kstack < base \|\| (uintptr_t) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
56	/*	56	/*
57	* Kernel stack of this thread is not locked in DTLB.	57	* Kernel stack of this thread is not locked in DTLB.
58	* First, make sure it is not mapped already.	58	* First, make sure it is not mapped already.
59	* If not, create a locked mapping for it.	59	* If not, create a locked mapping for it.
60	*/	60	*/
61	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);	61	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) THREAD->kstack);
62	dtlb_insert_mapping((__address) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);	62	dtlb_insert_mapping((uintptr_t) THREAD->kstack, KA2PA(THREAD->kstack), PAGESIZE_8K, true, true);
63	}	63	}
64	}	64	}
65		65
66	/** Unlock thread's stack from TLB, if necessary. */	66	/** Unlock thread's stack from TLB, if necessary. */
67	void after_thread_ran_arch(void)	67	void after_thread_ran_arch(void)
68	{	68	{
69	__address base;	69	uintptr_t base;
70		70
71	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);	71	base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
72		72
73	if ((__address) THREAD->kstack < base \|\| (__address) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {	73	if ((uintptr_t) THREAD->kstack < base \|\| (uintptr_t) THREAD->kstack > base + (1<<KERNEL_PAGE_WIDTH)) {
74	/*	74	/*
75	* Kernel stack of this thread is locked in DTLB.	75	* Kernel stack of this thread is locked in DTLB.
76	* Destroy the mapping.	76	* Destroy the mapping.
77	*/	77	*/
78	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (__address) THREAD->kstack);	78	dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) THREAD->kstack);
79	}	79	}
80	}	80	}
81		81
82	/** @}	82	/** @}
83	*/	83	*/