3  *  Page table allocation functions
22 	unsigned long *table;  in crst_table_alloc()  local
26 	table = ptdesc_to_virt(ptdesc);  in crst_table_alloc()
27 	__arch_set_page_dat(table, 1UL << CRST_ALLOC_ORDER);  in crst_table_alloc()
28 	return table;  in crst_table_alloc()
31 void crst_table_free(struct mm_struct *mm, unsigned long *table)  in crst_table_free()  argument
33 	if (!table)  in crst_table_free()
35 	pagetable_free(virt_to_ptdesc(table));  in crst_table_free()
121 	u64 *table;  in page_table_alloc_pgste()  local
125 		table = (u64 *)ptdesc_to_virt(ptdesc);  in page_table_alloc_pgste()
126 		__arch_set_page_dat(table, 1);  in page_table_alloc_pgste()
127 		memset64(table, _PAGE_INVALID, PTRS_PER_PTE);  in page_table_alloc_pgste()
128 		memset64(table + PTRS_PER_PTE, 0, PTRS_PER_PTE);  in page_table_alloc_pgste()
143 	unsigned long *table;  in page_table_alloc()  local
152 	table = ptdesc_to_virt(ptdesc);  in page_table_alloc()
153 	__arch_set_page_dat(table, 1);  in page_table_alloc()
154 	memset64((u64 *)table, _PAGE_INVALID, PTRS_PER_PTE);  in page_table_alloc()
155 	memset64((u64 *)table + PTRS_PER_PTE, 0, PTRS_PER_PTE);  in page_table_alloc()
156 	return table;  in page_table_alloc()
159 void page_table_free(struct mm_struct *mm, unsigned long *table)  in page_table_free()  argument
161 	struct ptdesc *ptdesc = virt_to_ptdesc(table);  in page_table_free()
196 	unsigned long *table;  in base_pgt_alloc()  local
198 	table = kmem_cache_alloc(base_pgt_cache, GFP_KERNEL);  in base_pgt_alloc()
199 	if (table)  in base_pgt_alloc()
200 		memset64((u64 *)table, _PAGE_INVALID, PTRS_PER_PTE);  in base_pgt_alloc()
201 	return table;  in base_pgt_alloc()
204 static void base_pgt_free(unsigned long *table)  in base_pgt_free()  argument
206 	kmem_cache_free(base_pgt_cache, table);  in base_pgt_free()
211 	unsigned long *table;  in base_crst_alloc()  local
217 	table = ptdesc_address(ptdesc);  in base_crst_alloc()
218 	crst_table_init(table, val);  in base_crst_alloc()
219 	return table;  in base_crst_alloc()
222 static void base_crst_free(unsigned long *table)  in base_crst_free()  argument
224 	if (!table)  in base_crst_free()
226 	pagetable_free(virt_to_ptdesc(table));  in base_crst_free()
273 	unsigned long *ste, next, *table;  in base_segment_walk()  local
283 			table = base_pgt_alloc();  in base_segment_walk()
284 			if (!table)  in base_segment_walk()
286 			*ste = __pa(table) | _SEGMENT_ENTRY;  in base_segment_walk()
288 		table = __va(*ste & _SEGMENT_ENTRY_ORIGIN);  in base_segment_walk()
289 		rc = base_page_walk(table, addr, next, alloc);  in base_segment_walk()
293 			base_pgt_free(table);  in base_segment_walk()
302 	unsigned long *rtte, next, *table;  in base_region3_walk()  local
312 			table = base_crst_alloc(_SEGMENT_ENTRY_EMPTY);  in base_region3_walk()
313 			if (!table)  in base_region3_walk()
315 			*rtte = __pa(table) | _REGION3_ENTRY;  in base_region3_walk()
317 		table = __va(*rtte & _REGION_ENTRY_ORIGIN);  in base_region3_walk()
318 		rc = base_segment_walk(table, addr, next, alloc);  in base_region3_walk()
322 			base_crst_free(table);  in base_region3_walk()
330 	unsigned long *rste, next, *table;  in base_region2_walk()  local
340 			table = base_crst_alloc(_REGION3_ENTRY_EMPTY);  in base_region2_walk()
341 			if (!table)  in base_region2_walk()
343 			*rste = __pa(table) | _REGION2_ENTRY;  in base_region2_walk()
345 		table = __va(*rste & _REGION_ENTRY_ORIGIN);  in base_region2_walk()
346 		rc = base_region3_walk(table, addr, next, alloc);  in base_region2_walk()
350 			base_crst_free(table);  in base_region2_walk()
358 	unsigned long *rfte, next, *table;  in base_region1_walk()  local
368 			table = base_crst_alloc(_REGION2_ENTRY_EMPTY);  in base_region1_walk()
369 			if (!table)  in base_region1_walk()
371 			*rfte = __pa(table) | _REGION1_ENTRY;  in base_region1_walk()
373 		table = __va(*rfte & _REGION_ENTRY_ORIGIN);  in base_region1_walk()
374 		rc = base_region2_walk(table, addr, next, alloc);  in base_region1_walk()
378 			base_crst_free(table);  in base_region1_walk()
392 	unsigned long *table = __va(asce & _ASCE_ORIGIN);  in base_asce_free()  local
398 		base_segment_walk(table, 0, _REGION3_SIZE, 0);  in base_asce_free()
401 		base_region3_walk(table, 0, _REGION2_SIZE, 0);  in base_asce_free()
404 		base_region2_walk(table, 0, _REGION1_SIZE, 0);  in base_asce_free()
407 		base_region1_walk(table, 0, TASK_SIZE_MAX, 0);  in base_asce_free()
410 	base_crst_free(table);  in base_asce_free()
444 	unsigned long asce, *table, end;  in base_asce_alloc()  local
451 		table = base_crst_alloc(_SEGMENT_ENTRY_EMPTY);  in base_asce_alloc()
452 		if (!table)  in base_asce_alloc()
454 		rc = base_segment_walk(table, addr, end, 1);  in base_asce_alloc()
455 		asce = __pa(table) | _ASCE_TYPE_SEGMENT | _ASCE_TABLE_LENGTH;  in base_asce_alloc()
457 		table = base_crst_alloc(_REGION3_ENTRY_EMPTY);  in base_asce_alloc()
458 		if (!table)  in base_asce_alloc()
460 		rc = base_region3_walk(table, addr, end, 1);  in base_asce_alloc()
461 		asce = __pa(table) | _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;  in base_asce_alloc()
463 		table = base_crst_alloc(_REGION2_ENTRY_EMPTY);  in base_asce_alloc()
464 		if (!table)  in base_asce_alloc()
466 		rc = base_region2_walk(table, addr, end, 1);  in base_asce_alloc()
467 		asce = __pa(table) | _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH;  in base_asce_alloc()
469 		table = base_crst_alloc(_REGION1_ENTRY_EMPTY);  in base_asce_alloc()
470 		if (!table)  in base_asce_alloc()
472 		rc = base_region1_walk(table, addr, end, 1);  in base_asce_alloc()
473 		asce = __pa(table) | _ASCE_TYPE_REGION1 | _ASCE_TABLE_LENGTH;  in base_asce_alloc()