Differential D2535 Diff 20387 sys/mips/mips/vm_machdep.c

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sys/mips/mips/vm_machdep.c

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	cpu_thread_clean(struct thread *td)			cpu_thread_clean(struct thread *td)
	{			{
	}			}

	void			void
	cpu_thread_swapin(struct thread *td)			cpu_thread_swapin(struct thread *td)
	{			{
	pt_entry_t *pte;			pt_entry_t *pte;
	int i;

	/*			/*
	* The kstack may be at a different physical address now.			* The kstack may be at a different physical address now.
	* Cache the PTEs for the Kernel stack in the machine dependent			* Cache the PTEs for the Kernel stack in the machine dependent
	* part of the thread struct so cpu_switch() can quickly map in			* part of the thread struct so cpu_switch() can quickly map in
	* the pcb struct and kernel stack.			* the pcb struct and kernel stack.
	*/			*/
				#ifdef KSTACK_LARGE_PAGE
				/* Just one entry for one large kernel page. */
				pte = pmap_pte(kernel_pmap, td->td_kstack);
				td->td_md.md_upte[0] = *pte & ~TLBLO_SWBITS_MASK;
				td->td_md.md_upte[1] = 1;

				#else

				int i;

	for (i = 0; i < KSTACK_PAGES; i++) {			for (i = 0; i < KSTACK_PAGES; i++) {
	pte = pmap_pte(kernel_pmap, td->td_kstack + i * PAGE_SIZE);			pte = pmap_pte(kernel_pmap, td->td_kstack + i * PAGE_SIZE);
	td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;			td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;
	}			}
				#endif /* ! KSTACK_LARGE_PAGE */
	}			}

	void			void
	cpu_thread_swapout(struct thread *td)			cpu_thread_swapout(struct thread *td)
	{			{
	}			}

	void			void
	cpu_thread_alloc(struct thread *td)			cpu_thread_alloc(struct thread *td)
	{			{
	pt_entry_t *pte;			pt_entry_t *pte;
	int i;

	KASSERT((td->td_kstack & (1 << PAGE_SHIFT)) == 0, ("kernel stack must be aligned."));			KASSERT((td->td_kstack & ((KSTACK_PAGE_SIZE * 2) - 1) ) == 0,
				("kernel stack must be aligned."));
	td->td_pcb = (struct pcb *)(td->td_kstack +			td->td_pcb = (struct pcb *)(td->td_kstack +
	td->td_kstack_pages * PAGE_SIZE) - 1;			td->td_kstack_pages * PAGE_SIZE) - 1;
	td->td_frame = &td->td_pcb->pcb_regs;			td->td_frame = &td->td_pcb->pcb_regs;

				#ifdef KSTACK_LARGE_PAGE
				/* Just one entry for one large kernel page. */
				pte = pmap_pte(kernel_pmap, td->td_kstack);
				td->td_md.md_upte[0] = *pte & ~TLBLO_SWBITS_MASK;
				td->td_md.md_upte[1] = 1;

				#else

				{
				int i;

	for (i = 0; i < KSTACK_PAGES; i++) {			for (i = 0; i < KSTACK_PAGES; i++) {
	pte = pmap_pte(kernel_pmap, td->td_kstack + i * PAGE_SIZE);			pte = pmap_pte(kernel_pmap, td->td_kstack + i *
				PAGE_SIZE);
	td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;			td->td_md.md_upte[i] = *pte & ~TLBLO_SWBITS_MASK;
	}			}
				}
				#endif /* ! KSTACK_LARGE_PAGE */
	}			}

	void			void
	cpu_set_syscall_retval(struct thread *td, int error)			cpu_set_syscall_retval(struct thread *td, int error)
	{			{
	struct trapframe *locr0 = td->td_frame;			struct trapframe *locr0 = td->td_frame;
	unsigned int code;			unsigned int code;
	int quad_syscall;			int quad_syscall;
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