From d9b2b2a277219d4812311d995054ce4f95067725 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 13 Feb 2008 16:56:49 -0800
Subject: [PATCH] [LIB]: Make PowerPC LMB code generic so sparc64 can use it
 too.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/powerpc/Kconfig                    |  1 +
 arch/powerpc/kernel/btext.c             |  3 +-
 arch/powerpc/kernel/crash.c             |  3 +-
 arch/powerpc/kernel/crash_dump.c        |  3 +-
 arch/powerpc/kernel/machine_kexec.c     |  3 +-
 arch/powerpc/kernel/prom.c              |  2 +-
 arch/powerpc/kernel/rtas.c              |  2 +-
 arch/powerpc/kernel/setup-common.c      |  2 +-
 arch/powerpc/kernel/setup_64.c          |  2 +-
 arch/powerpc/kernel/vdso.c              |  3 +-
 arch/powerpc/mm/Makefile                |  2 +-
 arch/powerpc/mm/hash_utils_64.c         |  3 +-
 arch/powerpc/mm/init_32.c               |  2 +-
 arch/powerpc/mm/init_64.c               |  2 +-
 arch/powerpc/mm/mem.c                   |  2 +-
 arch/powerpc/mm/numa.c                  |  3 +-
 arch/powerpc/mm/ppc_mmu_32.c            |  2 +-
 arch/powerpc/mm/stab.c                  |  4 +-
 arch/powerpc/platforms/cell/iommu.c     |  2 +-
 arch/powerpc/platforms/maple/setup.c    |  2 +-
 arch/powerpc/platforms/powermac/setup.c |  2 +-
 arch/powerpc/platforms/ps3/htab.c       |  3 +-
 arch/powerpc/platforms/ps3/mm.c         |  3 +-
 arch/powerpc/platforms/ps3/os-area.c    |  3 +-
 arch/powerpc/sysdev/dart_iommu.c        |  2 +-
 arch/sparc64/Kconfig                    |  1 +
 include/asm-powerpc/abs_addr.h          |  3 +-
 include/asm-powerpc/lmb.h               | 82 +++---------------------
 include/asm-sparc64/lmb.h               | 10 +++
 include/linux/lmb.h                     | 83 +++++++++++++++++++++++++
 lib/Kconfig                             |  3 +
 lib/Makefile                            |  2 +
 {arch/powerpc/mm => lib}/lmb.c          | 33 +++++-----
 33 files changed, 161 insertions(+), 117 deletions(-)
 create mode 100644 include/asm-sparc64/lmb.h
 create mode 100644 include/linux/lmb.h
 rename {arch/powerpc/mm => lib}/lmb.c (94%)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 485513c9f1af..bd645f0d1e43 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -90,6 +90,7 @@ config PPC
 	select HAVE_IDE
 	select HAVE_OPROFILE
 	select HAVE_KPROBES
+	select HAVE_LMB
 
 config EARLY_PRINTK
 	bool
diff --git a/arch/powerpc/kernel/btext.c b/arch/powerpc/kernel/btext.c
index 80e2eef05b2e..9f9377745490 100644
--- a/arch/powerpc/kernel/btext.c
+++ b/arch/powerpc/kernel/btext.c
@@ -7,6 +7,7 @@
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/lmb.h>
 
 #include <asm/sections.h>
 #include <asm/prom.h>
@@ -15,7 +16,7 @@
 #include <asm/mmu.h>
 #include <asm/pgtable.h>
 #include <asm/io.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/processor.h>
 #include <asm/udbg.h>
 
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 571132ed12c1..eae401de3f76 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -24,12 +24,13 @@
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/types.h>
+#include <linux/lmb.h>
 
 #include <asm/processor.h>
 #include <asm/machdep.h>
 #include <asm/kexec.h>
 #include <asm/kdump.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/firmware.h>
 #include <asm/smp.h>
 #include <asm/system.h>
diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c
index 29ff77c468ac..9ee3c5278db0 100644
--- a/arch/powerpc/kernel/crash_dump.c
+++ b/arch/powerpc/kernel/crash_dump.c
@@ -13,8 +13,9 @@
 
 #include <linux/crash_dump.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 #include <asm/kdump.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/firmware.h>
 #include <asm/uaccess.h>
 
diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index c0c8e8c3ced9..2d202f274e73 100644
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -12,8 +12,9 @@
 #include <linux/kexec.h>
 #include <linux/reboot.h>
 #include <linux/threads.h>
+#include <linux/lmb.h>
 #include <asm/machdep.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 
 void machine_crash_shutdown(struct pt_regs *regs)
 {
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 8b5efbce8d90..c17a5851bdb7 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -31,10 +31,10 @@
 #include <linux/kexec.h>
 #include <linux/debugfs.h>
 #include <linux/irq.h>
+#include <linux/lmb.h>
 
 #include <asm/prom.h>
 #include <asm/rtas.h>
-#include <asm/lmb.h>
 #include <asm/page.h>
 #include <asm/processor.h>
 #include <asm/irq.h>
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 52e95c2158c0..e2e78d967f31 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -22,6 +22,7 @@
 #include <linux/smp.h>
 #include <linux/completion.h>
 #include <linux/cpumask.h>
+#include <linux/lmb.h>
 
 #include <asm/prom.h>
 #include <asm/rtas.h>
@@ -34,7 +35,6 @@
 #include <asm/system.h>
 #include <asm/delay.h>
 #include <asm/uaccess.h>
-#include <asm/lmb.h>
 #include <asm/udbg.h>
 #include <asm/syscalls.h>
 #include <asm/smp.h>
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 6adb5a1e98bb..12cc41c16b0d 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -34,6 +34,7 @@
 #include <linux/serial_8250.h>
 #include <linux/debugfs.h>
 #include <linux/percpu.h>
+#include <linux/lmb.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/processor.h>
@@ -56,7 +57,6 @@
 #include <asm/cache.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
-#include <asm/lmb.h>
 #include <asm/xmon.h>
 #include <asm/cputhreads.h>
 
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 3b1529c103ef..2c2d8315193c 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -33,6 +33,7 @@
 #include <linux/serial_8250.h>
 #include <linux/bootmem.h>
 #include <linux/pci.h>
+#include <linux/lmb.h>
 #include <asm/io.h>
 #include <asm/kdump.h>
 #include <asm/prom.h>
@@ -55,7 +56,6 @@
 #include <asm/cache.h>
 #include <asm/page.h>
 #include <asm/mmu.h>
-#include <asm/lmb.h>
 #include <asm/firmware.h>
 #include <asm/xmon.h>
 #include <asm/udbg.h>
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index 3702df7dc567..d715048370df 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -21,13 +21,14 @@
 #include <linux/elf.h>
 #include <linux/security.h>
 #include <linux/bootmem.h>
+#include <linux/lmb.h>
 
 #include <asm/pgtable.h>
 #include <asm/system.h>
 #include <asm/processor.h>
 #include <asm/mmu.h>
 #include <asm/mmu_context.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/machdep.h>
 #include <asm/cputable.h>
 #include <asm/sections.h>
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index 41649a5d3602..1c00e0196f6c 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -6,7 +6,7 @@ ifeq ($(CONFIG_PPC64),y)
 EXTRA_CFLAGS	+= -mno-minimal-toc
 endif
 
-obj-y				:= fault.o mem.o lmb.o \
+obj-y				:= fault.o mem.o \
 				   init_$(CONFIG_WORD_SIZE).o \
 				   pgtable_$(CONFIG_WORD_SIZE).o \
 				   mmu_context_$(CONFIG_WORD_SIZE).o
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 32f416175db1..73b78486abfc 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -31,6 +31,7 @@
 #include <linux/cache.h>
 #include <linux/init.h>
 #include <linux/signal.h>
+#include <linux/lmb.h>
 
 #include <asm/processor.h>
 #include <asm/pgtable.h>
@@ -41,7 +42,7 @@
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/machdep.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/abs_addr.h>
 #include <asm/tlbflush.h>
 #include <asm/io.h>
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 977cb1ee5e72..59a725b8ece9 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -30,6 +30,7 @@
 #include <linux/highmem.h>
 #include <linux/initrd.h>
 #include <linux/pagemap.h>
+#include <linux/lmb.h>
 
 #include <asm/pgalloc.h>
 #include <asm/prom.h>
@@ -41,7 +42,6 @@
 #include <asm/machdep.h>
 #include <asm/btext.h>
 #include <asm/tlb.h>
-#include <asm/lmb.h>
 #include <asm/sections.h>
 
 #include "mmu_decl.h"
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index c0f5cff77035..abeb0eb79313 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -38,11 +38,11 @@
 #include <linux/nodemask.h>
 #include <linux/module.h>
 #include <linux/poison.h>
+#include <linux/lmb.h>
 
 #include <asm/pgalloc.h>
 #include <asm/page.h>
 #include <asm/prom.h>
-#include <asm/lmb.h>
 #include <asm/rtas.h>
 #include <asm/io.h>
 #include <asm/mmu_context.h>
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index be5c506779a7..60c019cdc69f 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -31,6 +31,7 @@
 #include <linux/initrd.h>
 #include <linux/pagemap.h>
 #include <linux/suspend.h>
+#include <linux/lmb.h>
 
 #include <asm/pgalloc.h>
 #include <asm/prom.h>
@@ -42,7 +43,6 @@
 #include <asm/machdep.h>
 #include <asm/btext.h>
 #include <asm/tlb.h>
-#include <asm/lmb.h>
 #include <asm/sections.h>
 #include <asm/vdso.h>
 
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index a300d254aac6..1efd631211ef 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -17,8 +17,9 @@
 #include <linux/nodemask.h>
 #include <linux/cpu.h>
 #include <linux/notifier.h>
+#include <linux/lmb.h>
 #include <asm/sparsemem.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/system.h>
 #include <asm/smp.h>
 
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 5c45d474cfcc..72de3c79210a 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -26,11 +26,11 @@
 #include <linux/mm.h>
 #include <linux/init.h>
 #include <linux/highmem.h>
+#include <linux/lmb.h>
 
 #include <asm/prom.h>
 #include <asm/mmu.h>
 #include <asm/machdep.h>
-#include <asm/lmb.h>
 
 #include "mmu_decl.h"
 
diff --git a/arch/powerpc/mm/stab.c b/arch/powerpc/mm/stab.c
index 50448d5de9d2..efbbd13d93e5 100644
--- a/arch/powerpc/mm/stab.c
+++ b/arch/powerpc/mm/stab.c
@@ -12,12 +12,14 @@
  *      2 of the License, or (at your option) any later version.
  */
 
+#include <linux/lmb.h>
+
 #include <asm/pgtable.h>
 #include <asm/mmu.h>
 #include <asm/mmu_context.h>
 #include <asm/paca.h>
 #include <asm/cputable.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/abs_addr.h>
 #include <asm/firmware.h>
 #include <asm/iseries/hv_call.h>
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index edab631a8dcb..61381586895f 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -28,13 +28,13 @@
 #include <linux/notifier.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/lmb.h>
 
 #include <asm/prom.h>
 #include <asm/iommu.h>
 #include <asm/machdep.h>
 #include <asm/pci-bridge.h>
 #include <asm/udbg.h>
-#include <asm/lmb.h>
 #include <asm/firmware.h>
 #include <asm/cell-regs.h>
 
diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c
index 3ce2d73b4177..dadf33b5c09c 100644
--- a/arch/powerpc/platforms/maple/setup.c
+++ b/arch/powerpc/platforms/maple/setup.c
@@ -43,6 +43,7 @@
 #include <linux/smp.h>
 #include <linux/bitops.h>
 #include <linux/of_device.h>
+#include <linux/lmb.h>
 
 #include <asm/processor.h>
 #include <asm/sections.h>
@@ -57,7 +58,6 @@
 #include <asm/dma.h>
 #include <asm/cputable.h>
 #include <asm/time.h>
-#include <asm/lmb.h>
 #include <asm/mpic.h>
 #include <asm/rtas.h>
 #include <asm/udbg.h>
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 36ff1b6b7fac..59404baf911f 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -53,6 +53,7 @@
 #include <linux/suspend.h>
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
+#include <linux/lmb.h>
 
 #include <asm/reg.h>
 #include <asm/sections.h>
@@ -74,7 +75,6 @@
 #include <asm/iommu.h>
 #include <asm/smu.h>
 #include <asm/pmc.h>
-#include <asm/lmb.h>
 #include <asm/udbg.h>
 
 #include "pmac.h"
diff --git a/arch/powerpc/platforms/ps3/htab.c b/arch/powerpc/platforms/ps3/htab.c
index 7382f195c4f8..1cf901fa9031 100644
--- a/arch/powerpc/platforms/ps3/htab.c
+++ b/arch/powerpc/platforms/ps3/htab.c
@@ -19,9 +19,10 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/lmb.h>
 
 #include <asm/machdep.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/udbg.h>
 #include <asm/lv1call.h>
 #include <asm/ps3fb.h>
diff --git a/arch/powerpc/platforms/ps3/mm.c b/arch/powerpc/platforms/ps3/mm.c
index 68900476c842..5b3fb2b321ab 100644
--- a/arch/powerpc/platforms/ps3/mm.c
+++ b/arch/powerpc/platforms/ps3/mm.c
@@ -21,9 +21,10 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/memory_hotplug.h>
+#include <linux/lmb.h>
 
 #include <asm/firmware.h>
-#include <asm/lmb.h>
+#include <asm/prom.h>
 #include <asm/udbg.h>
 #include <asm/lv1call.h>
 
diff --git a/arch/powerpc/platforms/ps3/os-area.c b/arch/powerpc/platforms/ps3/os-area.c
index b9ea09d9d2fb..c73379ec9141 100644
--- a/arch/powerpc/platforms/ps3/os-area.c
+++ b/arch/powerpc/platforms/ps3/os-area.c
@@ -24,8 +24,9 @@
 #include <linux/fs.h>
 #include <linux/syscalls.h>
 #include <linux/ctype.h>
+#include <linux/lmb.h>
 
-#include <asm/lmb.h>
+#include <asm/prom.h>
 
 #include "platform.h"
 
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index e0e24b01e3a6..005c2ecf976f 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -37,6 +37,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/vmalloc.h>
 #include <linux/suspend.h>
+#include <linux/lmb.h>
 #include <asm/io.h>
 #include <asm/prom.h>
 #include <asm/iommu.h>
@@ -44,7 +45,6 @@
 #include <asm/machdep.h>
 #include <asm/abs_addr.h>
 #include <asm/cacheflush.h>
-#include <asm/lmb.h>
 #include <asm/ppc-pci.h>
 
 #include "dart.h"
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index 3af378ddb6ae..b18d24d249fa 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -15,6 +15,7 @@ config SPARC64
 	bool
 	default y
 	select HAVE_IDE
+	select HAVE_LMB
 	help
 	  SPARC is a family of RISC microprocessors designed and marketed by
 	  Sun Microsystems, incorporated.  This port covers the newer 64-bit
diff --git a/include/asm-powerpc/abs_addr.h b/include/asm-powerpc/abs_addr.h
index 4aa220718b19..98324c5a8286 100644
--- a/include/asm-powerpc/abs_addr.h
+++ b/include/asm-powerpc/abs_addr.h
@@ -12,10 +12,11 @@
  * 2 of the License, or (at your option) any later version.
  */
 
+#include <linux/lmb.h>
+
 #include <asm/types.h>
 #include <asm/page.h>
 #include <asm/prom.h>
-#include <asm/lmb.h>
 #include <asm/firmware.h>
 
 struct mschunks_map {
diff --git a/include/asm-powerpc/lmb.h b/include/asm-powerpc/lmb.h
index 5d1dc48a0bb8..028184b6a162 100644
--- a/include/asm-powerpc/lmb.h
+++ b/include/asm-powerpc/lmb.h
@@ -1,81 +1,15 @@
 #ifndef _ASM_POWERPC_LMB_H
 #define _ASM_POWERPC_LMB_H
-#ifdef __KERNEL__
 
-/*
- * Definitions for talking to the Open Firmware PROM on
- * Power Macintosh computers.
- *
- * Copyright (C) 2001 Peter Bergner, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
+#include <asm/udbg.h>
 
-#include <linux/init.h>
-#include <asm/prom.h>
+#define LMB_DBG(fmt...) udbg_printf(fmt)
 
-#define MAX_LMB_REGIONS 128
+#ifdef CONFIG_PPC32
+extern unsigned long __max_low_memory;
+#define LMB_REAL_LIMIT	__max_low_memory
+#else
+#define LMB_REAL_LIMIT	0
+#endif
 
-struct lmb_property {
-	unsigned long base;
-	unsigned long size;
-};
-
-struct lmb_region {
-	unsigned long cnt;
-	unsigned long size;
-	struct lmb_property region[MAX_LMB_REGIONS+1];
-};
-
-struct lmb {
-	unsigned long debug;
-	unsigned long rmo_size;
-	struct lmb_region memory;
-	struct lmb_region reserved;
-};
-
-extern struct lmb lmb;
-
-extern void __init lmb_init(void);
-extern void __init lmb_analyze(void);
-extern long __init lmb_add(unsigned long base, unsigned long size);
-extern long __init lmb_reserve(unsigned long base, unsigned long size);
-extern unsigned long __init lmb_alloc(unsigned long size, unsigned long align);
-extern unsigned long __init lmb_alloc_base(unsigned long size,
-		unsigned long align, unsigned long max_addr);
-extern unsigned long __init __lmb_alloc_base(unsigned long size,
-		unsigned long align, unsigned long max_addr);
-extern unsigned long __init lmb_phys_mem_size(void);
-extern unsigned long __init lmb_end_of_DRAM(void);
-extern void __init lmb_enforce_memory_limit(unsigned long memory_limit);
-extern int __init lmb_is_reserved(unsigned long addr);
-
-extern void lmb_dump_all(void);
-
-static inline unsigned long
-lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
-{
-	return type->region[region_nr].size;
-}
-static inline unsigned long
-lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
-{
-	return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
-}
-static inline unsigned long
-lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
-{
-	return type->region[region_nr].base >> PAGE_SHIFT;
-}
-static inline unsigned long
-lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
-{
-	return lmb_start_pfn(type, region_nr) +
-	       lmb_size_pages(type, region_nr);
-}
-
-#endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_LMB_H */
diff --git a/include/asm-sparc64/lmb.h b/include/asm-sparc64/lmb.h
new file mode 100644
index 000000000000..6a352cbcf520
--- /dev/null
+++ b/include/asm-sparc64/lmb.h
@@ -0,0 +1,10 @@
+#ifndef _SPARC64_LMB_H
+#define _SPARC64_LMB_H
+
+#include <asm/oplib.h>
+
+#define LMB_DBG(fmt...) prom_printf(fmt)
+
+#define LMB_REAL_LIMIT	0
+
+#endif /* !(_SPARC64_LMB_H) */
diff --git a/include/linux/lmb.h b/include/linux/lmb.h
new file mode 100644
index 000000000000..8b93f63407e9
--- /dev/null
+++ b/include/linux/lmb.h
@@ -0,0 +1,83 @@
+#ifndef _LINUX_LMB_H
+#define _LINUX_LMB_H
+#ifdef __KERNEL__
+
+/*
+ * Logical memory blocks.
+ *
+ * Copyright (C) 2001 Peter Bergner, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/mm.h>
+
+#define MAX_LMB_REGIONS 128
+
+struct lmb_property {
+	unsigned long base;
+	unsigned long size;
+};
+
+struct lmb_region {
+	unsigned long cnt;
+	unsigned long size;
+	struct lmb_property region[MAX_LMB_REGIONS+1];
+};
+
+struct lmb {
+	unsigned long debug;
+	unsigned long rmo_size;
+	struct lmb_region memory;
+	struct lmb_region reserved;
+};
+
+extern struct lmb lmb;
+
+extern void __init lmb_init(void);
+extern void __init lmb_analyze(void);
+extern long __init lmb_add(unsigned long base, unsigned long size);
+extern long __init lmb_reserve(unsigned long base, unsigned long size);
+extern unsigned long __init lmb_alloc(unsigned long size, unsigned long align);
+extern unsigned long __init lmb_alloc_base(unsigned long size,
+		unsigned long align, unsigned long max_addr);
+extern unsigned long __init __lmb_alloc_base(unsigned long size,
+		unsigned long align, unsigned long max_addr);
+extern unsigned long __init lmb_phys_mem_size(void);
+extern unsigned long __init lmb_end_of_DRAM(void);
+extern void __init lmb_enforce_memory_limit(unsigned long memory_limit);
+extern int __init lmb_is_reserved(unsigned long addr);
+
+extern void lmb_dump_all(void);
+
+static inline unsigned long
+lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
+{
+	return type->region[region_nr].size;
+}
+static inline unsigned long
+lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
+{
+	return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
+}
+static inline unsigned long
+lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
+{
+	return type->region[region_nr].base >> PAGE_SHIFT;
+}
+static inline unsigned long
+lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
+{
+	return lmb_start_pfn(type, region_nr) +
+	       lmb_size_pages(type, region_nr);
+}
+
+#include <asm/lmb.h>
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_LMB_H */
diff --git a/lib/Kconfig b/lib/Kconfig
index ba3d104994d9..2d53dc092e8b 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -141,4 +141,7 @@ config HAS_DMA
 config CHECK_SIGNATURE
 	bool
 
+config HAVE_LMB
+	boolean
+
 endmenu
diff --git a/lib/Makefile b/lib/Makefile
index 23de261a4c83..61bba16a0a2f 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -70,6 +70,8 @@ obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
 
 lib-$(CONFIG_GENERIC_BUG) += bug.o
 
+obj-$(CONFIG_HAVE_LMB) += lmb.o
+
 hostprogs-y	:= gen_crc32table
 clean-files	:= crc32table.h
 
diff --git a/arch/powerpc/mm/lmb.c b/lib/lmb.c
similarity index 94%
rename from arch/powerpc/mm/lmb.c
rename to lib/lmb.c
index 4ce23bcf8a57..98078b4ec20e 100644
--- a/arch/powerpc/mm/lmb.c
+++ b/lib/lmb.c
@@ -3,7 +3,7 @@
  *
  * Peter Bergner, IBM Corp.	June 2001.
  * Copyright (C) 2001 Peter Bergner.
- * 
+ *
  *      This program is free software; you can redistribute it and/or
  *      modify it under the terms of the GNU General Public License
  *      as published by the Free Software Foundation; either version
@@ -13,19 +13,12 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/bitops.h>
-#include <asm/types.h>
-#include <asm/page.h>
-#include <asm/prom.h>
-#include <asm/lmb.h>
-#ifdef CONFIG_PPC32
-#include "mmu_decl.h"		/* for __max_low_memory */
-#endif
+#include <linux/lmb.h>
 
 #undef DEBUG
 
 #ifdef DEBUG
-#include <asm/udbg.h>
-#define DBG(fmt...) udbg_printf(fmt)
+#define DBG(fmt...) LMB_DBG(fmt)
 #else
 #define DBG(fmt...)
 #endif
@@ -247,6 +240,11 @@ unsigned long __init lmb_alloc_base(unsigned long size, unsigned long align,
 	return alloc;
 }
 
+static unsigned long lmb_align_down(unsigned long addr, unsigned long size)
+{
+	return addr & ~(size - 1);
+}
+
 unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
 				    unsigned long max_addr)
 {
@@ -255,27 +253,26 @@ unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
 
 	BUG_ON(0 == size);
 
-#ifdef CONFIG_PPC32
-	/* On 32-bit, make sure we allocate lowmem */
+	/* On some platforms, make sure we allocate lowmem */
 	if (max_addr == LMB_ALLOC_ANYWHERE)
-		max_addr = __max_low_memory;
-#endif
+		max_addr = LMB_REAL_LIMIT;
+
 	for (i = lmb.memory.cnt-1; i >= 0; i--) {
 		unsigned long lmbbase = lmb.memory.region[i].base;
 		unsigned long lmbsize = lmb.memory.region[i].size;
 
 		if (max_addr == LMB_ALLOC_ANYWHERE)
-			base = _ALIGN_DOWN(lmbbase + lmbsize - size, align);
+			base = lmb_align_down(lmbbase + lmbsize - size, align);
 		else if (lmbbase < max_addr) {
 			base = min(lmbbase + lmbsize, max_addr);
-			base = _ALIGN_DOWN(base - size, align);
+			base = lmb_align_down(base - size, align);
 		} else
 			continue;
 
 		while ((lmbbase <= base) &&
 		       ((j = lmb_overlaps_region(&lmb.reserved, base, size)) >= 0) )
-			base = _ALIGN_DOWN(lmb.reserved.region[j].base - size,
-					   align);
+			base = lmb_align_down(lmb.reserved.region[j].base - size,
+					      align);
 
 		if ((base != 0) && (lmbbase <= base))
 			break;
-- 
2.39.2