MIPS: Loongson64: Clean up numa.c

(1) Replace nid_to_addroffset() with nid_to_addrbase() and then remove the
related useless code.

(2) Since end_pfn = start_pfn + node_psize, use "node_psize" instead of
"end_pfn - start_pfn" to avoid the redundant calculation.

(3) After commit 6fbde6b492df ("MIPS: Loongson64: Move files to the
top-level directory"), CONFIG_ZONE_DMA32 is always set for Loongson64
due to MACH_LOONGSON64 selects ZONE_DMA32, so no need to use ifdef any
more, just remove it.

Signed-off-by: Tiezhu Yang <[e-mail]>
Reviewed-by: Jiaxun Yang <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

arch/mips/include/asm/mach-loongson64/mmzone.h

···
 
 #include <boot_param.h>
 #define NODE_ADDRSPACE_SHIFT 44
-#define NODE0_ADDRSPACE_OFFSET 0x000000000000UL
-#define NODE1_ADDRSPACE_OFFSET 0x100000000000UL
-#define NODE2_ADDRSPACE_OFFSET 0x200000000000UL
-#define NODE3_ADDRSPACE_OFFSET 0x300000000000UL
 
 #define pa_to_nid(addr)  (((addr) & 0xf00000000000) >> NODE_ADDRSPACE_SHIFT)
-#define nid_to_addrbase(nid) ((nid) << NODE_ADDRSPACE_SHIFT)
+#define nid_to_addrbase(nid) ((unsigned long)(nid) << NODE_ADDRSPACE_SHIFT)
 
 extern struct pglist_data *__node_data[];
 

arch/mips/loongson64/numa.c

···
 	}
 }
 
-static unsigned long nid_to_addroffset(unsigned int nid)
-{
-	unsigned long result;
-	switch (nid) {
-	case 0:
-	default:
-		result = NODE0_ADDRSPACE_OFFSET;
-		break;
-	case 1:
-		result = NODE1_ADDRSPACE_OFFSET;
-		break;
-	case 2:
-		result = NODE2_ADDRSPACE_OFFSET;
-		break;
-	case 3:
-		result = NODE3_ADDRSPACE_OFFSET;
-		break;
-	}
-	return result;
-}
-
 static void __init szmem(unsigned int node)
 {
 	u32 i, mem_type;
···
 			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
 				start_pfn, end_pfn, num_physpages);
 			memblock_add_node(PFN_PHYS(start_pfn),
-				PFN_PHYS(end_pfn - start_pfn), node);
+				PFN_PHYS(node_psize), node);
 			break;
 		case SYSTEM_RAM_HIGH:
 			start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
···
 			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
 				start_pfn, end_pfn, num_physpages);
 			memblock_add_node(PFN_PHYS(start_pfn),
-				PFN_PHYS(end_pfn - start_pfn), node);
+				PFN_PHYS(node_psize), node);
 			break;
 		case SYSTEM_RAM_RESERVED:
 			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
···
 	unsigned long node_addrspace_offset;
 	unsigned long start_pfn, end_pfn;
 
-	node_addrspace_offset = nid_to_addroffset(node);
+	node_addrspace_offset = nid_to_addrbase(node);
 	pr_info("Node%d's addrspace_offset is 0x%lx\n",
 			node, node_addrspace_offset);
 
···
 	unsigned long zones_size[MAX_NR_ZONES] = {0, };
 
 	pagetable_init();
-#ifdef CONFIG_ZONE_DMA32
 	zones_size[ZONE_DMA32] = MAX_DMA32_PFN;
-#endif
 	zones_size[ZONE_NORMAL] = max_low_pfn;
 	free_area_init(zones_size);
 }