19 struct region {  struct
25 static struct region __initdata mem[MPU_MAX_REGIONS];  argument
27 static struct region __initdata xip[MPU_MAX_REGIONS];
46 /* Region number */
52 /* Data-side / unified region attributes */
54 /* Region access control register */
60 /* Region size register */
66 /* Region base address register */
76 /* Optional instruction-side region attributes */
78 /* I-side Region access control register */
84 /* I-side Region size register */
90 /* I-side Region base address register */
108 /* Data-side / unified region attributes */
110 /* Region access control register */
118 /* Region size register */
126 /* Region base address register */
146 static bool __init try_split_region(phys_addr_t base, phys_addr_t size, struct region *region)  in try_split_region()  argument
177 			_set_bit(i, &region->subreg);  in try_split_region()
180 			_set_bit(PMSAv7_NR_SUBREGS - i, &region->subreg);  in try_split_region()
183 	region->base = abase;  in try_split_region()
184 	region->size = p2size;  in try_split_region()
190 				  unsigned int limit, struct region *regions)  in allocate_region()
197 		/* Try cover region as is (maybe with help of subregions) */  in allocate_region()
205 			 * Maximum aligned region might overflow phys_addr_t  in allocate_region()
207 			 * until we take the smaller of the aligned region  in allocate_region()
208 			 * size ("asize") and rounded region size ("p2size"),  in allocate_region()
250 	/* We need to keep one slot for background region */  in pmsav7_adjust_lowmem_bounds()
306 		pr_warn("Truncating memory from %pa to %pa (MPU region constraints)",  in pmsav7_adjust_lowmem_bounds()
344 	/* We've kept a region free for this probing */  in __mpu_min_region_order()
349 	 * region order  in __mpu_min_region_order()
360 	isb(); /* Ensure that MPU region operations have completed */  in __mpu_min_region_order()
372 	/* We kept a region free for probing resolution of MPU regions*/  in mpu_setup_region()
383 	/* Writing N to bits 5:1 (RSR_SZ)  specifies region size 2^N+1 */  in mpu_setup_region()
395 	isb(); /* Propagate properties before enabling region */  in mpu_setup_region()
407 	/* Store region info (we treat i/d side the same, so only store d) */  in mpu_setup_region()
422 	int i, region = 0, err = 0;  in pmsav7_setup()  local
427 	err |= mpu_setup_region(region++, 0, 32,  in pmsav7_setup()
435                  * In case we overwrite RAM region we set earlier in  in pmsav7_setup()
438                  * with BG region (which is uncachable), thus we need  in pmsav7_setup()
441 		bool need_flush = region == PMSAv7_RAM_REGION;  in pmsav7_setup()
446 		err |= mpu_setup_region(region++, xip[i].base, ilog2(xip[i].size),  in pmsav7_setup()
457 		err |= mpu_setup_region(region++, mem[i].base, ilog2(mem[i].size),  in pmsav7_setup()
464 	err |= mpu_setup_region(region++, vectors_base, ilog2(2 * PAGE_SIZE),  in pmsav7_setup()
469 		panic("MPU region initialization failure! %d", err);  in pmsav7_setup()
472 			 "Region independence: %s, Used %d of %d regions\n",  in pmsav7_setup()