WebSVN – HelenOS – Diff – //trunk/kernel/arch/ppc32/src/mm/tlb.c



{
    /*
     * Check if the mapping exists in page tables.
     */
    pte_t *pte = page_mapping_find(as, badvaddr);
    if ((pte) && (pte->present)) {
        /*
         * Mapping found in page tables.
         * Immediately succeed.
         */
        return pte;

             * The higher-level page fault handler succeeded,
             * The mapping ought to be in place.
             */
            page_table_lock(as, lock);
            pte = page_mapping_find(as, badvaddr);
            ASSERT((pte) && (pte->present));
            *pfrc = 0;
            return pte;
        case AS_PF_DEFER:
            page_table_lock(as, lock);
            *pfrc = rc;

    panic("%p: PHT Refill Exception at %p (%s<-%s).", badvaddr,
        istate->pc, symbol, sym2);
}
 
 
static void pht_insert(const uintptr_t vaddr, const pte_t *pte)
{
    uint32_t page = (vaddr >> 12) & 0xffff;
    uint32_t api = (vaddr >> 22) & 0x3f;
   
    uint32_t vsid;

   
    phte[base + i].v = 1;
    phte[base + i].vsid = vsid;
    phte[base + i].h = h;
    phte[base + i].api = api;
    phte[base + i].rpn = pte->pfn;
    phte[base + i].r = 0;
    phte[base + i].c = 0;
    phte[base + i].wimg = (pte->page_cache_disable ? WIMG_NO_CACHE : 0);
    phte[base + i].pp = 2; // FIXME
}
 
 
static void pht_real_insert(const uintptr_t vaddr, const pfn_t pfn)

    phte_physical[base + i].h = h;
    phte_physical[base + i].api = api;
    phte_physical[base + i].rpn = pfn;
    phte_physical[base + i].r = 0;
    phte_physical[base + i].c = 0;
    phte_physical[base + i].wimg = 0;
    phte_physical[base + i].pp = 2; // FIXME
}
 
 
/** Process Instruction/Data Storage Interrupt

        default:
            panic("Unexpected pfrc (%d).", pfrc);
        }
    }
   
    pte->accessed = 1; /* Record access to PTE */
    pht_insert(badvaddr, pte);
   
    page_table_unlock(as, lock);
    return;
   
fail:

Rev 3827	Rev 3830
Line 64...	Line 64...
64	{	64	{
65	/*	65	/*
66	* Check if the mapping exists in page tables.	66	* Check if the mapping exists in page tables.
67	*/	67	*/
68	pte_t *pte = page_mapping_find(as, badvaddr);	68	pte_t *pte = page_mapping_find(as, badvaddr);
69	if ((pte) && (pte->p)) {	69	if ((pte) && (pte->present)) {
70	/*	70	/*
71	* Mapping found in page tables.	71	* Mapping found in page tables.
72	* Immediately succeed.	72	* Immediately succeed.
73	*/	73	*/
74	return pte;	74	return pte;
Line 86...	Line 86...
86	* The higher-level page fault handler succeeded,	86	* The higher-level page fault handler succeeded,
87	* The mapping ought to be in place.	87	* The mapping ought to be in place.
88	*/	88	*/
89	page_table_lock(as, lock);	89	page_table_lock(as, lock);
90	pte = page_mapping_find(as, badvaddr);	90	pte = page_mapping_find(as, badvaddr);
91	ASSERT((pte) && (pte->p));	91	ASSERT((pte) && (pte->present));
92	*pfrc = 0;	92	*pfrc = 0;
93	return pte;	93	return pte;
94	case AS_PF_DEFER:	94	case AS_PF_DEFER:
95	page_table_lock(as, lock);	95	page_table_lock(as, lock);
96	*pfrc = rc;	96	*pfrc = rc;
Line 124...	Line 124...
124	panic("%p: PHT Refill Exception at %p (%s<-%s).", badvaddr,	124	panic("%p: PHT Refill Exception at %p (%s<-%s).", badvaddr,
125	istate->pc, symbol, sym2);	125	istate->pc, symbol, sym2);
126	}	126	}
127		127
128		128
129	static void pht_insert(const uintptr_t vaddr, const pfn_t pfn)	129	static void pht_insert(const uintptr_t vaddr, const pte_t *pte)
130	{	130	{
131	uint32_t page = (vaddr >> 12) & 0xffff;	131	uint32_t page = (vaddr >> 12) & 0xffff;
132	uint32_t api = (vaddr >> 22) & 0x3f;	132	uint32_t api = (vaddr >> 22) & 0x3f;
133		133
134	uint32_t vsid;	134	uint32_t vsid;
Line 187...	Line 187...
187		187
188	phte[base + i].v = 1;	188	phte[base + i].v = 1;
189	phte[base + i].vsid = vsid;	189	phte[base + i].vsid = vsid;
190	phte[base + i].h = h;	190	phte[base + i].h = h;
191	phte[base + i].api = api;	191	phte[base + i].api = api;
192	phte[base + i].rpn = pfn;	192	phte[base + i].rpn = pte->pfn;
193	phte[base + i].r = 0;	193	phte[base + i].r = 0;
194	phte[base + i].c = 0;	194	phte[base + i].c = 0;
-		195	phte[base + i].wimg = (pte->page_cache_disable ? WIMG_NO_CACHE : 0);
195	phte[base + i].pp = 2; // FIXME	196	phte[base + i].pp = 2; // FIXME
196	}	197	}
197		198
198		199
199	static void pht_real_insert(const uintptr_t vaddr, const pfn_t pfn)	200	static void pht_real_insert(const uintptr_t vaddr, const pfn_t pfn)
Line 261...	Line 262...
261	phte_physical[base + i].h = h;	262	phte_physical[base + i].h = h;
262	phte_physical[base + i].api = api;	263	phte_physical[base + i].api = api;
263	phte_physical[base + i].rpn = pfn;	264	phte_physical[base + i].rpn = pfn;
264	phte_physical[base + i].r = 0;	265	phte_physical[base + i].r = 0;
265	phte_physical[base + i].c = 0;	266	phte_physical[base + i].c = 0;
-		267	phte_physical[base + i].wimg = 0;
266	phte_physical[base + i].pp = 2; // FIXME	268	phte_physical[base + i].pp = 2; // FIXME
267	}	269	}
268		270
269		271
270	/** Process Instruction/Data Storage Interrupt	272	/** Process Instruction/Data Storage Interrupt
Line 316...	Line 318...
316	default:	318	default:
317	panic("Unexpected pfrc (%d).", pfrc);	319	panic("Unexpected pfrc (%d).", pfrc);
318	}	320	}
319	}	321	}
320		322
321	pte->a = 1; /* Record access to PTE */	323	pte->accessed = 1; /* Record access to PTE */
322	pht_insert(badvaddr, pte->pfn);	324	pht_insert(badvaddr, pte);
323		325
324	page_table_unlock(as, lock);	326	page_table_unlock(as, lock);
325	return;	327	return;
326		328
327	fail:	329	fail:

Subversion Repositories HelenOS

(root)//trunk/kernel/arch/ppc32/src/mm/tlb.c – Rev 3827 → 3830