3  *  Page table allocation functions
47 	unsigned long *table;  in crst_table_alloc()  local
51 	table = ptdesc_to_virt(ptdesc);  in crst_table_alloc()
52 	__arch_set_page_dat(table, 1UL << CRST_ALLOC_ORDER);  in crst_table_alloc()
53 	return table;  in crst_table_alloc()
56 void crst_table_free(struct mm_struct *mm, unsigned long *table)  in crst_table_free()  argument
58 	if (!table)  in crst_table_free()
60 	pagetable_free(virt_to_ptdesc(table));  in crst_table_free()
146 	u64 *table;  in page_table_alloc_pgste()  local
150 		table = (u64 *)ptdesc_to_virt(ptdesc);  in page_table_alloc_pgste()
151 		__arch_set_page_dat(table, 1);  in page_table_alloc_pgste()
152 		memset64(table, _PAGE_INVALID, PTRS_PER_PTE);  in page_table_alloc_pgste()
153 		memset64(table + PTRS_PER_PTE, 0, PTRS_PER_PTE);  in page_table_alloc_pgste()
168 	unsigned long *table;  in page_table_alloc()  local
177 	table = ptdesc_to_virt(ptdesc);  in page_table_alloc()
178 	__arch_set_page_dat(table, 1);  in page_table_alloc()
179 	memset64((u64 *)table, _PAGE_INVALID, PTRS_PER_PTE);  in page_table_alloc()
180 	memset64((u64 *)table + PTRS_PER_PTE, 0, PTRS_PER_PTE);  in page_table_alloc()
181 	return table;  in page_table_alloc()
184 void page_table_free(struct mm_struct *mm, unsigned long *table)  in page_table_free()  argument
186 	struct ptdesc *ptdesc = virt_to_ptdesc(table);  in page_table_free()
221 	unsigned long *table;  in base_pgt_alloc()  local
223 	table = kmem_cache_alloc(base_pgt_cache, GFP_KERNEL);  in base_pgt_alloc()
224 	if (table)  in base_pgt_alloc()
225 		memset64((u64 *)table, _PAGE_INVALID, PTRS_PER_PTE);  in base_pgt_alloc()
226 	return table;  in base_pgt_alloc()
229 static void base_pgt_free(unsigned long *table)  in base_pgt_free()  argument
231 	kmem_cache_free(base_pgt_cache, table);  in base_pgt_free()
236 	unsigned long *table;  in base_crst_alloc()  local
242 	table = ptdesc_address(ptdesc);  in base_crst_alloc()
243 	crst_table_init(table, val);  in base_crst_alloc()
244 	return table;  in base_crst_alloc()
247 static void base_crst_free(unsigned long *table)  in base_crst_free()  argument
249 	if (!table)  in base_crst_free()
251 	pagetable_free(virt_to_ptdesc(table));  in base_crst_free()
298 	unsigned long *ste, next, *table;  in base_segment_walk()  local
308 			table = base_pgt_alloc();  in base_segment_walk()
309 			if (!table)  in base_segment_walk()
311 			*ste = __pa(table) | _SEGMENT_ENTRY;  in base_segment_walk()
313 		table = __va(*ste & _SEGMENT_ENTRY_ORIGIN);  in base_segment_walk()
314 		rc = base_page_walk(table, addr, next, alloc);  in base_segment_walk()
318 			base_pgt_free(table);  in base_segment_walk()
327 	unsigned long *rtte, next, *table;  in base_region3_walk()  local
337 			table = base_crst_alloc(_SEGMENT_ENTRY_EMPTY);  in base_region3_walk()
338 			if (!table)  in base_region3_walk()
340 			*rtte = __pa(table) | _REGION3_ENTRY;  in base_region3_walk()
342 		table = __va(*rtte & _REGION_ENTRY_ORIGIN);  in base_region3_walk()
343 		rc = base_segment_walk(table, addr, next, alloc);  in base_region3_walk()
347 			base_crst_free(table);  in base_region3_walk()
355 	unsigned long *rste, next, *table;  in base_region2_walk()  local
365 			table = base_crst_alloc(_REGION3_ENTRY_EMPTY);  in base_region2_walk()
366 			if (!table)  in base_region2_walk()
368 			*rste = __pa(table) | _REGION2_ENTRY;  in base_region2_walk()
370 		table = __va(*rste & _REGION_ENTRY_ORIGIN);  in base_region2_walk()
371 		rc = base_region3_walk(table, addr, next, alloc);  in base_region2_walk()
375 			base_crst_free(table);  in base_region2_walk()
383 	unsigned long *rfte, next, *table;  in base_region1_walk()  local
393 			table = base_crst_alloc(_REGION2_ENTRY_EMPTY);  in base_region1_walk()
394 			if (!table)  in base_region1_walk()
396 			*rfte = __pa(table) | _REGION1_ENTRY;  in base_region1_walk()
398 		table = __va(*rfte & _REGION_ENTRY_ORIGIN);  in base_region1_walk()
399 		rc = base_region2_walk(table, addr, next, alloc);  in base_region1_walk()
403 			base_crst_free(table);  in base_region1_walk()
417 	unsigned long *table = __va(asce & _ASCE_ORIGIN);  in base_asce_free()  local
423 		base_segment_walk(table, 0, _REGION3_SIZE, 0);  in base_asce_free()
426 		base_region3_walk(table, 0, _REGION2_SIZE, 0);  in base_asce_free()
429 		base_region2_walk(table, 0, _REGION1_SIZE, 0);  in base_asce_free()
432 		base_region1_walk(table, 0, TASK_SIZE_MAX, 0);  in base_asce_free()
435 	base_crst_free(table);  in base_asce_free()
469 	unsigned long asce, *table, end;  in base_asce_alloc()  local
476 		table = base_crst_alloc(_SEGMENT_ENTRY_EMPTY);  in base_asce_alloc()
477 		if (!table)  in base_asce_alloc()
479 		rc = base_segment_walk(table, addr, end, 1);  in base_asce_alloc()
480 		asce = __pa(table) | _ASCE_TYPE_SEGMENT | _ASCE_TABLE_LENGTH;  in base_asce_alloc()
482 		table = base_crst_alloc(_REGION3_ENTRY_EMPTY);  in base_asce_alloc()
483 		if (!table)  in base_asce_alloc()
485 		rc = base_region3_walk(table, addr, end, 1);  in base_asce_alloc()
486 		asce = __pa(table) | _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;  in base_asce_alloc()
488 		table = base_crst_alloc(_REGION2_ENTRY_EMPTY);  in base_asce_alloc()
489 		if (!table)  in base_asce_alloc()
491 		rc = base_region2_walk(table, addr, end, 1);  in base_asce_alloc()
492 		asce = __pa(table) | _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH;  in base_asce_alloc()
494 		table = base_crst_alloc(_REGION1_ENTRY_EMPTY);  in base_asce_alloc()
495 		if (!table)  in base_asce_alloc()
497 		rc = base_region1_walk(table, addr, end, 1);  in base_asce_alloc()
498 		asce = __pa(table) | _ASCE_TYPE_REGION1 | _ASCE_TABLE_LENGTH;  in base_asce_alloc()