patch-2.4.0-test9 linux/arch/ppc/mm/init.c

• Lines: 652
• Date: Sun Sep 17 09:48:07 2000
• Orig file: v2.4.0-test8/linux/arch/ppc/mm/init.c
• Orig date: Mon Aug 7 21:02:27 2000

diff -u --recursive --new-file v2.4.0-test8/linux/arch/ppc/mm/init.c linux/arch/ppc/mm/init.c
@@ -36,6 +36,7 @@
 #include <linux/delay.h>
 #include <linux/openpic.h>
 #include <linux/bootmem.h>
+#include <linux/highmem.h>
 #ifdef CONFIG_BLK_DEV_INITRD
 #include <linux/blk.h>		/* for initrd_* */
 #endif
@@ -69,15 +70,20 @@
 #include "4xx_tlb.h"
 #endif
 
+#define MAX_LOW_MEM	(640 << 20)
+
 #define	PGTOKB(pages)	(((pages) * PAGE_SIZE) >> 10)
 
 int prom_trashed;
 atomic_t next_mmu_context;
 unsigned long *end_of_DRAM;
+unsigned long total_memory;
+unsigned long total_lowmem;
 int mem_init_done;
 int init_bootmem_done;
 int boot_mapsize;
 unsigned long totalram_pages = 0;
+unsigned long totalhigh_pages = 0;
 extern pgd_t swapper_pg_dir[];
 extern char _start[], _end[];
 extern char etext[], _stext[];
@@ -98,22 +104,26 @@
 #ifndef CONFIG_SMP
 struct pgtable_cache_struct quicklists;
 #endif
+#ifdef CONFIG_HIGHMEM
+pte_t *kmap_pte;
+pgprot_t kmap_prot;
+#endif
 
 void MMU_init(void);
 static void *MMU_get_page(void);
-unsigned long *prep_find_end_of_memory(void);
-unsigned long *pmac_find_end_of_memory(void);
-unsigned long *apus_find_end_of_memory(void);
-unsigned long *gemini_find_end_of_memory(void);
-extern unsigned long *find_end_of_memory(void);
+unsigned long prep_find_end_of_memory(void);
+unsigned long pmac_find_end_of_memory(void);
+unsigned long apus_find_end_of_memory(void);
+unsigned long gemini_find_end_of_memory(void);
+extern unsigned long find_end_of_memory(void);
 #ifdef CONFIG_8xx
-unsigned long *m8xx_find_end_of_memory(void);
+unsigned long m8xx_find_end_of_memory(void);
 #endif /* CONFIG_8xx */
 #ifdef CONFIG_4xx
-unsigned long *oak_find_end_of_memory(void);
+unsigned long oak_find_end_of_memory(void);
 #endif
 #ifdef CONFIG_8260
-unsigned long *m8260_find_end_of_memory(void);
+unsigned long m8260_find_end_of_memory(void);
 #endif /* CONFIG_8260 */
 static void mapin_ram(void);
 void map_page(unsigned long va, unsigned long pa, int flags);
@@ -269,6 +279,7 @@
 	int i,free = 0,total = 0,reserved = 0;
 	int shared = 0, cached = 0;
 	struct task_struct *p;
+	int highmem = 0;
 
 	printk("Mem-info:\n");
 	show_free_areas();
@@ -276,6 +287,8 @@
 	i = max_mapnr;
 	while (i-- > 0) {
 		total++;
+		if (PageHighMem(mem_map+i))
+			highmem++;
 		if (PageReserved(mem_map+i))
 			reserved++;
 		else if (PageSwapCache(mem_map+i))
@@ -286,6 +299,7 @@
 			shared += atomic_read(&mem_map[i].count) - 1;
 	}
 	printk("%d pages of RAM\n",total);
+	printk("%d pages of HIGHMEM\n", highmem);
 	printk("%d free pages\n",free);
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
@@ -354,6 +368,8 @@
 			continue;
 		val->sharedram += atomic_read(&mem_map[i].count) - 1;
 	}
+	val->totalhigh = totalhigh_pages;
+	val->freehigh = nr_free_highpages();
 	val->mem_unit = PAGE_SIZE;
 }
 
@@ -443,7 +459,8 @@
 
 void iounmap(void *addr)
 {
-	/* XXX todo */
+	if (addr > high_memory && (unsigned long) addr < ioremap_bot)
+		vfree((void *) (PAGE_MASK & (unsigned long) addr));
 }
 
 unsigned long iopa(unsigned long addr)
@@ -476,7 +493,7 @@
 {
 	pmd_t *pd, oldpd;
 	pte_t *pg;
-	
+
 	/* Use upper 10 bits of VA to index the first level map */
 	pd = pmd_offset(pgd_offset_k(va), va);
 	oldpd = *pd;
@@ -516,6 +533,7 @@
 	flush_hash_segments(0xd, 0xffffff);
 #else
 	__clear_user(Hash, Hash_size);
+	_tlbia();
 #ifdef CONFIG_SMP
 	smp_send_tlb_invalidate(0);
 #endif /* CONFIG_SMP */
@@ -610,6 +628,13 @@
 }
 #endif /* CONFIG_8xx */
 
+void flush_page_to_ram(struct page *page)
+{
+	unsigned long vaddr = kmap(page);
+	__flush_page_to_ram(vaddr);
+	kunmap(page);
+}
+
 #if !defined(CONFIG_4xx) && !defined(CONFIG_8xx)
 static void get_mem_prop(char *, struct mem_pieces *);
 
@@ -722,7 +747,7 @@
 		if (align && align < max_size)
 			max_size = align;
 
-		tot = (unsigned long)end_of_DRAM - KERNELBASE;
+		tot = total_lowmem;
 		for (bl = 128<<10; bl < max_size; bl <<= 1) {
 			if (bl * 2 > tot)
 				break;
@@ -745,6 +770,8 @@
 	for (i = 0; i < phys_mem.n_regions; ++i) {
 		v = (ulong)__va(phys_mem.regions[i].address);
 		p = phys_mem.regions[i].address;
+		if (p >= total_lowmem)
+			break;
 		for (s = 0; s < phys_mem.regions[i].size; s += PAGE_SIZE) {
                         /* On the MPC8xx, we want the page shared so we
                          * don't get ASID compares on kernel space.
@@ -766,6 +793,8 @@
 			map_page(v, p, f);
 			v += PAGE_SIZE;
 			p += PAGE_SIZE;
+			if (p >= total_lowmem)
+				break;
 		}
 	}
 }
@@ -788,77 +817,42 @@
 	return p;
 }
 
-void __init free_initmem(void)
+static void free_sec(unsigned long start, unsigned long end, const char *name)
 {
-	unsigned long a;
-	unsigned long num_freed_pages = 0, num_prep_pages = 0,
-		num_pmac_pages = 0, num_openfirmware_pages = 0,
-		num_apus_pages = 0, num_chrp_pages = 0;
-#define FREESEC(START,END,CNT) do { \
-	a = (unsigned long)(&START); \
-	for (; a < (unsigned long)(&END); a += PAGE_SIZE) { \
-	  	clear_bit(PG_reserved, &virt_to_page(a)->flags); \
-		set_page_count(virt_to_page(a), 1); \
-		free_page(a); \
-		CNT++; \
-	} \
-} while (0)
-
-	FREESEC(__init_begin,__init_end,num_freed_pages);
-	switch (_machine)
-	{
-	case _MACH_Pmac:
-		FREESEC(__apus_begin,__apus_end,num_apus_pages);
-		FREESEC(__prep_begin,__prep_end,num_prep_pages);
-		FREESEC(__chrp_begin,__chrp_end,num_chrp_pages);
-		break;
-	case _MACH_chrp:
-		FREESEC(__apus_begin,__apus_end,num_apus_pages);
-		FREESEC(__pmac_begin,__pmac_end,num_pmac_pages);
-		FREESEC(__prep_begin,__prep_end,num_prep_pages);
-		break;
-	case _MACH_prep:
-		FREESEC(__apus_begin,__apus_end,num_apus_pages);
-		FREESEC(__pmac_begin,__pmac_end,num_pmac_pages);
-		FREESEC(__chrp_begin,__chrp_end,num_chrp_pages);
-		break;
-	case _MACH_mbx:
-		FREESEC(__apus_begin,__apus_end,num_apus_pages);
-		FREESEC(__pmac_begin,__pmac_end,num_pmac_pages);
-		FREESEC(__prep_begin,__prep_end,num_prep_pages);
-		FREESEC(__chrp_begin,__chrp_end,num_chrp_pages);
-		break;
-	case _MACH_apus:
-		FREESEC(__pmac_begin,__pmac_end,num_pmac_pages);
-		FREESEC(__prep_begin,__prep_end,num_prep_pages);
-		FREESEC(__chrp_begin,__chrp_end,num_chrp_pages);
-		break;
-	case _MACH_gemini:
-		FREESEC(__apus_begin,__apus_end,num_apus_pages);
-		FREESEC(__pmac_begin,__pmac_end,num_pmac_pages);
-		FREESEC(__prep_begin,__prep_end,num_prep_pages);
-		FREESEC(__chrp_begin,__chrp_end,num_chrp_pages);
-		break;
-	}
+	unsigned long cnt = 0;
 
-	if ( !have_of )
-		FREESEC( __openfirmware_begin, __openfirmware_end,
-			 num_openfirmware_pages );
-	
-	printk ("Freeing unused kernel memory: %ldk init",
-		PGTOKB(num_freed_pages));
+	while (start < end) {
+	  	clear_bit(PG_reserved, &virt_to_page(start)->flags);
+		set_page_count(virt_to_page(start), 1);
+		free_page(start);
+		cnt++;
+		start += PAGE_SIZE;
+ 	}
+	if (cnt)
+		printk(" %ldk %s", PGTOKB(cnt), name);
+}
 
-	if ( num_prep_pages )
-		printk(" %ldk prep", PGTOKB(num_prep_pages));
-	if ( num_chrp_pages )
-		printk(" %ldk chrp", PGTOKB(num_chrp_pages));
-	if ( num_pmac_pages )
-		printk(" %ldk pmac", PGTOKB(num_pmac_pages));
-	if ( num_openfirmware_pages )
-		printk(" %ldk open firmware", PGTOKB(num_openfirmware_pages));
-	if ( num_apus_pages )
-		printk(" %ldk apus", PGTOKB(num_apus_pages));
-	printk("\n");
+void free_initmem(void)
+{
+#define FREESEC(TYPE) \
+	free_sec((unsigned long)(&__ ## TYPE ## _begin), \
+		 (unsigned long)(&__ ## TYPE ## _end), \
+		 #TYPE);
+
+	printk ("Freeing unused kernel memory:");
+	FREESEC(init);
+	if (_machine != _MACH_Pmac)
+		FREESEC(pmac);
+	if (_machine != _MACH_chrp)
+		FREESEC(chrp);
+	if (_machine != _MACH_prep)
+		FREESEC(prep);
+	if (_machine != _MACH_apus)
+		FREESEC(apus);
+	if (!have_of)
+		FREESEC(openfirmware);
+ 	printk("\n");
+#undef FREESEC
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
@@ -909,7 +903,8 @@
 	 * at KERNELBASE.
 	 */
 
-        end_of_DRAM = oak_find_end_of_memory();
+        total_memory = total_lowmem = oak_find_end_of_memory();
+	end_of_DRAM = __va(total_memory);
         mapin_ram();
 
 	/*
@@ -939,23 +934,33 @@
 	if ( ppc_md.progress ) ppc_md.progress("MMU:enter", 0x111);
 #ifndef CONFIG_8xx
 	if (have_of)
-		end_of_DRAM = pmac_find_end_of_memory();
+		total_memory = pmac_find_end_of_memory();
 #ifdef CONFIG_APUS
 	else if (_machine == _MACH_apus )
-		end_of_DRAM = apus_find_end_of_memory();
+		total_memory = apus_find_end_of_memory();
 #endif
 #ifdef CONFIG_GEMINI	
 	else if ( _machine == _MACH_gemini )
-		end_of_DRAM = gemini_find_end_of_memory();
+		total_memory = gemini_find_end_of_memory();
 #endif /* CONFIG_GEMINI	*/
 #if defined(CONFIG_8260)
 	else
-		end_of_DRAM = m8260_find_end_of_memory();
+		total_memory = m8260_find_end_of_memory();
 #else
 	else /* prep */
-		end_of_DRAM = prep_find_end_of_memory();
+		total_memory = prep_find_end_of_memory();
 #endif
 
+	total_lowmem = total_memory;
+#ifdef CONFIG_HIGHMEM
+	if (total_lowmem > MAX_LOW_MEM) {
+		total_lowmem = MAX_LOW_MEM;
+		mem_pieces_remove(&phys_avail, total_lowmem,
+				  total_memory - total_lowmem, 0);
+	}
+#endif /* CONFIG_HIGHMEM */
+	end_of_DRAM = __va(total_lowmem);
+
 	if ( ppc_md.progress ) ppc_md.progress("MMU:hash init", 0x300);
         hash_init();
 #ifndef CONFIG_PPC64BRIDGE
@@ -995,7 +1000,7 @@
 #endif
 		break;
 	case _MACH_Pmac:
-		ioremap_base = 0xf8000000;
+		ioremap_base = 0xfe000000;
 		break;
 	case _MACH_apus:
 		/* Map PPC exception vectors. */
@@ -1022,7 +1027,15 @@
 #endif /* CONFIG_POWER4 */
 #else /* CONFIG_8xx */
 
-	end_of_DRAM = m8xx_find_end_of_memory();
+	total_memory = total_lowmem = m8xx_find_end_of_memory();
+#ifdef CONFIG_HIGHMEM
+	if (total_lowmem > MAX_LOW_MEM) {
+		total_lowmem = MAX_LOW_MEM;
+		mem_pieces_remove(&phys_avail, total_lowmem,
+				  total_memory - total_lowmem, 0);
+	}
+#endif /* CONFIG_HIGHMEM */
+	end_of_DRAM = __va(total_lowmem);
 
         /* Map in all of RAM starting at KERNELBASE */
         mapin_ram();
@@ -1055,7 +1068,7 @@
 	if ( ppc_md.progress ) ppc_md.progress("MMU:exit", 0x211);
 #ifdef CONFIG_BOOTX_TEXT
 	/* Must be done last, or ppc_md.progress will die */
-	if (_machine == _MACH_Pmac)
+	if (_machine == _MACH_Pmac || _machine == _MACH_chrp)
 		map_bootx_text();
 #endif
 }
@@ -1092,7 +1105,7 @@
 	start = PAGE_ALIGN(start);
 
 	boot_mapsize = init_bootmem(start >> PAGE_SHIFT,
-				    __pa(end_of_DRAM) >> PAGE_SHIFT);
+				    total_lowmem >> PAGE_SHIFT);
 
 	/* remove the bootmem bitmap from the available memory */
 	mem_pieces_remove(&phys_avail, start, boot_mapsize, 1);
@@ -1105,47 +1118,6 @@
 	init_bootmem_done = 1;
 }
 
-#if 0
-/*
- * Find some memory for setup_arch to return.
- * We use the largest chunk of available memory as the area
- * that setup_arch returns, making sure that there are at
- * least 32 pages unused before this for MMU_get_page to use.
- */
-unsigned long __init find_available_memory(void)
-{
-	int i, rn;
-	unsigned long a, free;
-	unsigned long start, end;
-
-	if (_machine == _MACH_mbx) {
-		/* Return the first, not the last region, because we
-                 * may not yet have properly initialized the additonal
-                 * memory DIMM.
-                 */
-                a = PAGE_ALIGN(phys_avail.regions[0].address);
-                avail_start = (unsigned long) __va(a);
-                return avail_start;
-        }
-	
-	rn = 0;
-	for (i = 1; i < phys_avail.n_regions; ++i)
-		if (phys_avail.regions[i].size > phys_avail.regions[rn].size)
-			rn = i;
-	free = 0;
-	for (i = 0; i < rn; ++i) {
-		start = phys_avail.regions[i].address;
-		end = start + phys_avail.regions[i].size;
-		free += (end & PAGE_MASK) - PAGE_ALIGN(start);
-	}
-	a = PAGE_ALIGN(phys_avail.regions[rn].address);
-	if (free < 32 * PAGE_SIZE)
-		a += 32 * PAGE_SIZE - free;
-	avail_start = (unsigned long) __va(a);
-	return avail_start;
-}
-#endif /* 0 */
-
 /*
  * paging_init() sets up the page tables - in fact we've already done this.
  */
@@ -1153,6 +1125,14 @@
 {
 	unsigned long zones_size[MAX_NR_ZONES], i;
 
+#ifdef CONFIG_HIGHMEM
+	map_page(PKMAP_BASE, 0, 0);	/* XXX gross */
+	pkmap_page_table = pte_offset(pmd_offset(pgd_offset_k(PKMAP_BASE), PKMAP_BASE), PKMAP_BASE);
+	map_page(KMAP_FIX_BEGIN, 0, 0);	/* XXX gross */
+	kmap_pte = pte_offset(pmd_offset(pgd_offset_k(KMAP_FIX_BEGIN), KMAP_FIX_BEGIN), KMAP_FIX_BEGIN);
+	kmap_prot = PAGE_KERNEL;
+#endif /* CONFIG_HIGHMEM */
+
 	/*
 	 * Grab some memory for bad_page and bad_pagetable to use.
 	 */
@@ -1162,9 +1142,14 @@
 	/*
 	 * All pages are DMA-able so we put them all in the DMA zone.
 	 */
-	zones_size[0] = ((unsigned long)end_of_DRAM - KERNELBASE) >> PAGE_SHIFT;
+	zones_size[ZONE_DMA] = total_lowmem >> PAGE_SHIFT;
 	for (i = 1; i < MAX_NR_ZONES; i++)
 		zones_size[i] = 0;
+
+#ifdef CONFIG_HIGHMEM
+	zones_size[ZONE_HIGHMEM] = (total_memory - total_lowmem) >> PAGE_SHIFT;
+#endif /* CONFIG_HIGHMEM */
+
 	free_area_init(zones_size);
 }
 
@@ -1176,7 +1161,17 @@
 	int codepages = 0;
 	int datapages = 0;
 	int initpages = 0;
+#ifdef CONFIG_HIGHMEM
+	unsigned long highmem_mapnr;
+
+	highmem_mapnr = total_lowmem >> PAGE_SHIFT;
+	highmem_start_page = mem_map + highmem_mapnr;
+	max_mapnr = total_memory >> PAGE_SHIFT;
+	totalram_pages += max_mapnr - highmem_mapnr;
+#else
 	max_mapnr = max_low_pfn;
+#endif /* CONFIG_HIGHMEM */
+
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
 	num_physpages = max_mapnr;	/* RAM is assumed contiguous */
 
@@ -1217,11 +1212,28 @@
 			datapages++;
 	}
 
-        printk("Memory: %luk available (%dk kernel code, %dk data, %dk init) [%08x,%08lx]\n",
+#ifdef CONFIG_HIGHMEM
+	{
+		unsigned long pfn;
+
+		for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) {
+			struct page *page = mem_map + pfn;
+
+			ClearPageReserved(page);
+			set_bit(PG_highmem, &page->flags);
+			atomic_set(&page->count, 1);
+			__free_page(page);
+			totalhigh_pages++;
+		}
+		totalram_pages += totalhigh_pages;
+	}
+#endif /* CONFIG_HIGHMEM */
+
+        printk("Memory: %luk available (%dk kernel code, %dk data, %dk init, %ldk highmem)\n",
 	       (unsigned long)nr_free_pages()<< (PAGE_SHIFT-10),
 	       codepages<< (PAGE_SHIFT-10), datapages<< (PAGE_SHIFT-10),
 	       initpages<< (PAGE_SHIFT-10),
-	       PAGE_OFFSET, (unsigned long) end_of_DRAM);
+	       (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10)));
 	mem_init_done = 1;
 }
 
@@ -1234,7 +1246,7 @@
  * Our text, data, bss use something over 1MB, starting at 0.
  * Open Firmware may be using 1MB at the 4MB point.
  */
-unsigned long __init *pmac_find_end_of_memory(void)
+unsigned long __init pmac_find_end_of_memory(void)
 {
 	unsigned long a, total;
 	unsigned long ram_limit = 0xe0000000 - KERNELBASE;
@@ -1279,7 +1291,7 @@
 
 	set_phys_avail(&phys_mem);
 
-	return __va(total);
+	return total;
 }
 #endif /* CONFIG_ALL_PPC */
 
@@ -1290,7 +1302,7 @@
  * this will likely stay separate from the pmac.
  * -- Cort
  */
-unsigned long __init *prep_find_end_of_memory(void)
+unsigned long __init prep_find_end_of_memory(void)
 {
 	unsigned long total;
 	total = res->TotalMemory;
@@ -1308,15 +1320,15 @@
 	mem_pieces_append(&phys_mem, 0, total);
 	set_phys_avail(&phys_mem);
 
-	return (__va(total));
+	return (total);
 }
 #endif /* defined(CONFIG_ALL_PPC) */
 
 
 #if defined(CONFIG_GEMINI)
-unsigned long __init *gemini_find_end_of_memory(void)
+unsigned long __init gemini_find_end_of_memory(void)
 {
-	unsigned long total, *ret;
+	unsigned long total;
 	unsigned char reg;
 
 	reg = readb(GEMINI_MEMCFG);
@@ -1327,9 +1339,8 @@
 	phys_mem.regions[0].size = total;
 	phys_mem.n_regions = 1;
 	
-	ret = __va(phys_mem.regions[0].size);
 	set_phys_avail(&phys_mem);
-	return ret;
+	return phys_mem.regions[0].size;
 }
 #endif /* defined(CONFIG_GEMINI) */
 
@@ -1337,10 +1348,9 @@
 /*
  * Same hack as 8xx.
  */
-unsigned long __init *m8260_find_end_of_memory(void)
+unsigned long __init m8260_find_end_of_memory(void)
 {
 	bd_t	*binfo;
-	unsigned long *ret;
 	extern unsigned char __res[];
 	
 	binfo = (bd_t *)__res;
@@ -1349,15 +1359,14 @@
 	phys_mem.regions[0].size = binfo->bi_memsize;	
 	phys_mem.n_regions = 1;
 	
-	ret = __va(phys_mem.regions[0].size);
 	set_phys_avail(&phys_mem);
-	return ret;
+	return phys_mem.regions[0].size;
 }
 #endif /* CONFIG_8260 */
 
 #ifdef CONFIG_APUS
 #define HARDWARE_MAPPED_SIZE (512*1024)
-unsigned long __init *apus_find_end_of_memory(void)
+unsigned long __init apus_find_end_of_memory(void)
 {
 	int shadow = 0;
 
@@ -1421,7 +1430,7 @@
 	   the PowerUP board. Other system memory is horrible slow in
 	   comparison. The user can use other memory for swapping
 	   using the z2ram device. */
-	return __va(memory[0].addr + memory[0].size);
+	return memory[0].addr + memory[0].size;
 }
 #endif /* CONFIG_APUS */
 
@@ -1484,7 +1493,7 @@
 	/* Find some memory for the hash table. */
 	if ( Hash_size ) {
 		Hash = mem_pieces_find(Hash_size, Hash_size);
-		/*__clear_user(Hash, Hash_size);*/
+		cacheable_memzero(Hash, Hash_size);
 	} else
 		Hash = 0;
 #endif /* CONFIG_PPC64BRIDGE */
@@ -1544,10 +1553,9 @@
  * functions in the image just to get prom_init, all we really need right
  * now is the initialization of the physical memory region.
  */
-unsigned long __init *m8xx_find_end_of_memory(void)
+unsigned long __init m8xx_find_end_of_memory(void)
 {
 	bd_t	*binfo;
-	unsigned long *ret;
 	extern unsigned char __res[];
 	
 	binfo = (bd_t *)__res;
@@ -1555,12 +1563,9 @@
 	phys_mem.regions[0].address = 0;
 	phys_mem.regions[0].size = binfo->bi_memsize;	
 	phys_mem.n_regions = 1;
-	
-	ret = __va(phys_mem.regions[0].address+
-		   phys_mem.regions[0].size);
 
 	set_phys_avail(&phys_mem);
-	return ret;
+	return phys_mem.regions[0].address + phys_mem.regions[0].size;
 }
 #endif /* !CONFIG_4xx && !CONFIG_8xx */
 
@@ -1569,7 +1574,7 @@
  * Return the virtual address representing the top of physical RAM
  * on the Oak board.
  */
-unsigned long __init *
+unsigned long __init
 oak_find_end_of_memory(void)
 {
 	extern unsigned char __res[];
@@ -1580,12 +1585,9 @@
 	phys_mem.regions[0].address = 0;
 	phys_mem.regions[0].size = bip->bi_memsize;
 	phys_mem.n_regions = 1;
-	
-	ret = __va(phys_mem.regions[0].address +
-		   phys_mem.regions[0].size);
 
 	set_phys_avail(&phys_mem);
-	return (ret);
+	return (phys_mem.regions[0].address + phys_mem.regions[0].size);
 }
 #endif