patch-2.4.7 linux/arch/mips64/arc/memory.c

• Lines: 231
• Date: Wed Jul 4 11:50:39 2001
• Orig file: v2.4.6/linux/arch/mips64/arc/memory.c
• Orig date: Mon Aug 7 21:02:27 2000

diff -u --recursive --new-file v2.4.6/linux/arch/mips64/arc/memory.c linux/arch/mips64/arc/memory.c
@@ -1,11 +1,9 @@
-/* $Id: memory.c,v 1.5 2000/01/27 23:21:57 ralf Exp $
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
+/*
+ * memory.c: PROM library functions for acquiring/using memory descriptors
+ *           given to us from the ARCS firmware.
  *
  * Copyright (C) 1996 by David S. Miller
- * Copyright (C) 1999, 2000 by Ralf Baechle
+ * Copyright (C) 1999, 2000, 2001 by Ralf Baechle
  * Copyright (C) 1999, 2000 by Silicon Graphics, Inc.
  *
  * PROM library functions for acquiring/using memory descriptors given to us
@@ -41,7 +39,7 @@
 	"Free/Contig RAM",
 	"Generic Free RAM",
 	"Bad Memory",
-	"Standlong Program Pages",
+	"Standalone Program Pages",
 	"ARCS Temp Storage Area",
 	"ARCS Permanent Storage Area"
 };
@@ -54,31 +52,25 @@
 	"LoadedProgram",
 	"FirmwareTemporary",
 	"FirmwarePermanent",
-	"FreeContigiuous"
+	"FreeContiguous"
 };
 #define mtypes(a) (prom_flags & PROM_FLAG_ARCS) ? arcs_mtypes[a.arcs] : arc_mtypes[a.arc]
 #endif
 
-static struct prom_pmemblock pblocks[PROM_MAX_PMEMBLOCKS];
-
-#define MEMTYPE_DONTUSE   0
-#define MEMTYPE_PROM      1
-#define MEMTYPE_FREE      2
-
 static inline int memtype_classify_arcs (union linux_memtypes type)
 {
 	switch (type.arcs) {
 	case arcs_fcontig:
 	case arcs_free:
-		return MEMTYPE_FREE;
+		return BOOT_MEM_RAM;
 	case arcs_atmp:
-		return MEMTYPE_PROM;
+		return BOOT_MEM_ROM_DATA;
 	case arcs_eblock:
 	case arcs_rvpage:
 	case arcs_bmem:
 	case arcs_prog:
 	case arcs_aperm:
-		return MEMTYPE_DONTUSE;
+		return BOOT_MEM_RESERVED;
 	default:
 		BUG();
 	}
@@ -90,15 +82,15 @@
 	switch (type.arc) {
 	case arc_free:
 	case arc_fcontig:
-		return MEMTYPE_FREE;
+		return BOOT_MEM_RAM;
 	case arc_atmp:
-		return MEMTYPE_PROM;
+		return BOOT_MEM_ROM_DATA;
 	case arc_eblock:
 	case arc_rvpage:
 	case arc_bmem:
 	case arc_prog:
 	case arc_aperm:
-		return MEMTYPE_DONTUSE;
+		return BOOT_MEM_RESERVED;
 	default:
 		BUG();
 	}
@@ -113,52 +105,18 @@
 	return memtype_classify_arc(type);
 }
 
-static inline unsigned long find_max_low_pfn(void)
-{
-	struct prom_pmemblock *p, *highest;
-	unsigned long pfn;
-
-	p = pblocks;
-	highest = 0;
-	while (p->size != 0) {
-		if (!highest || p->base > highest->base)
-			highest = p;
-		p++;
-	}
-
-	pfn = (highest->base + highest->size) >> PAGE_SHIFT;
-#ifdef DEBUG
-	prom_printf("find_max_low_pfn: 0x%lx pfns.\n", pfn);
-#endif
-	return pfn;
-}
-
-static inline struct prom_pmemblock *find_largest_memblock(void)
-{
-	struct prom_pmemblock *p, *largest;
-
-	p = pblocks;
-	largest = 0;
-	while (p->size != 0) {
-		if (!largest || p->size > largest->size)
-			largest = p;
-		p++;
-	}
-
-	return largest;
-}
-
 void __init prom_meminit(void)
 {
-	struct prom_pmemblock *largest;
-	unsigned long bootmap_size;
 	struct linux_mdesc *p;
-	int totram;
-	int i = 0;
 
 #ifdef DEBUG
+	int i = 0;
+
 	prom_printf("ARCS MEMORY DESCRIPTOR dump:\n");
+	i=0;
+	prom_printf ("i=%d\n", i);
 	p = ArcGetMemoryDescriptor(PROM_NULL_MDESC);
+	prom_printf ("i=%d\n", i);
 	while(p) {
 		prom_printf("[%d,%p]: base<%08lx> pages<%08lx> type<%s>\n",
 			    i, p, p->base, p->pages, mtypes(p->type));
@@ -167,56 +125,17 @@
 	}
 #endif
 
-	totram = 0;
-	i = 0;
 	p = PROM_NULL_MDESC;
 	while ((p = ArcGetMemoryDescriptor(p))) {
-		pblocks[i].type = prom_memtype_classify(p->type);
-		pblocks[i].base = p->base << PAGE_SHIFT;
-		pblocks[i].size = p->pages << PAGE_SHIFT;
-
-		switch (pblocks[i].type) {
-		case MEMTYPE_FREE:
-			totram += pblocks[i].size;
-#ifdef DEBUG
-			prom_printf("free_chunk[%d]: base=%08lx size=%x\n",
-				    i, pblocks[i].base,
-				    pblocks[i].size);
-#endif
-			i++;
-			break;
-		case MEMTYPE_PROM:
-#ifdef DEBUG
-			prom_printf("prom_chunk[%d]: base=%08lx size=%x\n",
-				    i, pblocks[i].base,
-				    pblocks[i].size);
-#endif
-			i++;
-			break;
-		default:
-			break;
-		}
-	}
-	pblocks[i].size = 0;
+		unsigned long base, size;
+		long type;
 
-	max_low_pfn = find_max_low_pfn();
-	largest = find_largest_memblock();
-	bootmap_size = init_bootmem(largest->base >> PAGE_SHIFT, max_low_pfn);
-
-	for (i = 0; pblocks[i].size; i++)
-		if (pblocks[i].type == MEMTYPE_FREE)
-			free_bootmem(pblocks[i].base, pblocks[i].size);
-
-	/* This test is simpleminded.  It will fail if the bootmem bitmap
-	   falls into multiple adjacent ARC memory areas.  */
-	if (bootmap_size > largest->size) {
-		prom_printf("CRITIAL: overwriting PROM data.\n");
-		BUG();
-	}
-	reserve_bootmem(largest->base, bootmap_size);
+		base = p->base << PAGE_SHIFT;
+		size = p->pages << PAGE_SHIFT;
+		type = prom_memtype_classify(p->type);
 
-	printk("PROMLIB: Total free ram %dK / %dMB.\n",
-	       totram >> 10, totram >> 20);
+		add_memory_region(base, size, type);
+	}
 }
 
 void __init
@@ -224,18 +143,19 @@
 {
 	struct prom_pmemblock *p;
 	unsigned long freed = 0;
-	unsigned long addr, end;
+	unsigned long addr;
+	int i;
 
-	for (p = pblocks; p->size != 0; p++) {
-		if (p->type != MEMTYPE_PROM)
+	for (i = 0; i < boot_mem_map.nr_map; i++) {
+		if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
 			continue;
 
-		addr = PAGE_OFFSET + (unsigned long) (long) p->base;
-		end = addr + (unsigned long) (long) p->size;
-		while (addr < end) {
-			ClearPageReserved(virt_to_page(addr));
-			set_page_count(virt_to_page(addr), 1);
-			free_page(addr);
+		addr = boot_mem_map.map[i].addr;
+		while (addr < boot_mem_map.map[i].addr
+			      + boot_mem_map.map[i].size) {
+			ClearPageReserved(virt_to_page(__va(addr)));
+			set_page_count(virt_to_page(__va(addr)), 1);
+			free_page((unsigned long)__va(addr));
 			addr += PAGE_SIZE;
 			freed += PAGE_SIZE;
 		}