Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (202 commits)
  [POWERPC] Fix compile breakage for 64-bit UP configs
  [POWERPC] Define copy_siginfo_from_user32
  [POWERPC] Add compat handler for PTRACE_GETSIGINFO
  [POWERPC] i2c: Fix build breakage introduced by OF helpers
  [POWERPC] Optimize fls64() on 64-bit processors
  [POWERPC] irqtrace support for 64-bit powerpc
  [POWERPC] Stacktrace support for lockdep
  [POWERPC] Move stackframe definitions to common header
  [POWERPC] Fix device-tree locking vs. interrupts
  [POWERPC] Make pci_bus_to_host()'s struct pci_bus * argument const
  [POWERPC] Remove unused __max_memory variable
  [POWERPC] Simplify xics direct/lpar irq_host setup
  [POWERPC] Use pseries_setup_i8259_cascade() in pseries_mpic_init_IRQ()
  [POWERPC] Turn xics_setup_8259_cascade() into a generic pseries_setup_i8259_cascade()
  [POWERPC] Move xics_setup_8259_cascade() into platforms/pseries/setup.c
  [POWERPC] Use asm-generic/bitops/find.h in bitops.h
  [POWERPC] 83xx: mpc8315 - fix USB UTMI Host setup
  [POWERPC] 85xx: Fix the size of qe muram for MPC8568E
  [POWERPC] 86xx: mpc86xx_hpcn - Temporarily accept old dts node identifier.
  [POWERPC] 86xx: mark functions static, other minor cleanups
  ...

3 files changed, 433 insertions, 0 deletions

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 4d7649c326f6..bf8000fc7d48 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -68,6 +68,8 @@ 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/lib/lmb.c b/lib/lmb.c
new file mode 100644
index 000000000000..896e2832099e
--- /dev/null
+++ b/lib/lmb.c
@@ -0,0 +1,428 @@
+/*
+ * Procedures for maintaining information about logical memory blocks.
+ *
+ * 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
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/lmb.h>
+
+#define LMB_ALLOC_ANYWHERE	0
+
+struct lmb lmb;
+
+void lmb_dump_all(void)
+{
+#ifdef DEBUG
+	unsigned long i;
+
+	pr_debug("lmb_dump_all:\n");
+	pr_debug("    memory.cnt		  = 0x%lx\n", lmb.memory.cnt);
+	pr_debug("    memory.size		  = 0x%llx\n",
+	    (unsigned long long)lmb.memory.size);
+	for (i=0; i < lmb.memory.cnt ;i++) {
+		pr_debug("    memory.region[0x%x].base       = 0x%llx\n",
+		    i, (unsigned long long)lmb.memory.region[i].base);
+		pr_debug("		      .size     = 0x%llx\n",
+		    (unsigned long long)lmb.memory.region[i].size);
+	}
+
+	pr_debug("    reserved.cnt	  = 0x%lx\n", lmb.reserved.cnt);
+	pr_debug("    reserved.size	  = 0x%lx\n", lmb.reserved.size);
+	for (i=0; i < lmb.reserved.cnt ;i++) {
+		pr_debug("    reserved.region[0x%x].base       = 0x%llx\n",
+		    i, (unsigned long long)lmb.reserved.region[i].base);
+		pr_debug("		      .size     = 0x%llx\n",
+		    (unsigned long long)lmb.reserved.region[i].size);
+	}
+#endif /* DEBUG */
+}
+
+static unsigned long __init lmb_addrs_overlap(u64 base1, u64 size1,
+		u64 base2, u64 size2)
+{
+	return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
+}
+
+static long __init lmb_addrs_adjacent(u64 base1, u64 size1,
+		u64 base2, u64 size2)
+{
+	if (base2 == base1 + size1)
+		return 1;
+	else if (base1 == base2 + size2)
+		return -1;
+
+	return 0;
+}
+
+static long __init lmb_regions_adjacent(struct lmb_region *rgn,
+		unsigned long r1, unsigned long r2)
+{
+	u64 base1 = rgn->region[r1].base;
+	u64 size1 = rgn->region[r1].size;
+	u64 base2 = rgn->region[r2].base;
+	u64 size2 = rgn->region[r2].size;
+
+	return lmb_addrs_adjacent(base1, size1, base2, size2);
+}
+
+static void __init lmb_remove_region(struct lmb_region *rgn, unsigned long r)
+{
+	unsigned long i;
+
+	for (i = r; i < rgn->cnt - 1; i++) {
+		rgn->region[i].base = rgn->region[i + 1].base;
+		rgn->region[i].size = rgn->region[i + 1].size;
+	}
+	rgn->cnt--;
+}
+
+/* Assumption: base addr of region 1 < base addr of region 2 */
+static void __init lmb_coalesce_regions(struct lmb_region *rgn,
+		unsigned long r1, unsigned long r2)
+{
+	rgn->region[r1].size += rgn->region[r2].size;
+	lmb_remove_region(rgn, r2);
+}
+
+void __init lmb_init(void)
+{
+	/* Create a dummy zero size LMB which will get coalesced away later.
+	 * This simplifies the lmb_add() code below...
+	 */
+	lmb.memory.region[0].base = 0;
+	lmb.memory.region[0].size = 0;
+	lmb.memory.cnt = 1;
+
+	/* Ditto. */
+	lmb.reserved.region[0].base = 0;
+	lmb.reserved.region[0].size = 0;
+	lmb.reserved.cnt = 1;
+}
+
+void __init lmb_analyze(void)
+{
+	int i;
+
+	lmb.memory.size = 0;
+
+	for (i = 0; i < lmb.memory.cnt; i++)
+		lmb.memory.size += lmb.memory.region[i].size;
+}
+
+static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
+{
+	unsigned long coalesced = 0;
+	long adjacent, i;
+
+	if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) {
+		rgn->region[0].base = base;
+		rgn->region[0].size = size;
+		return 0;
+	}
+
+	/* First try and coalesce this LMB with another. */
+	for (i = 0; i < rgn->cnt; i++) {
+		u64 rgnbase = rgn->region[i].base;
+		u64 rgnsize = rgn->region[i].size;
+
+		if ((rgnbase == base) && (rgnsize == size))
+			/* Already have this region, so we're done */
+			return 0;
+
+		adjacent = lmb_addrs_adjacent(base, size, rgnbase, rgnsize);
+		if (adjacent > 0) {
+			rgn->region[i].base -= size;
+			rgn->region[i].size += size;
+			coalesced++;
+			break;
+		} else if (adjacent < 0) {
+			rgn->region[i].size += size;
+			coalesced++;
+			break;
+		}
+	}
+
+	if ((i < rgn->cnt - 1) && lmb_regions_adjacent(rgn, i, i+1)) {
+		lmb_coalesce_regions(rgn, i, i+1);
+		coalesced++;
+	}
+
+	if (coalesced)
+		return coalesced;
+	if (rgn->cnt >= MAX_LMB_REGIONS)
+		return -1;
+
+	/* Couldn't coalesce the LMB, so add it to the sorted table. */
+	for (i = rgn->cnt - 1; i >= 0; i--) {
+		if (base < rgn->region[i].base) {
+			rgn->region[i+1].base = rgn->region[i].base;
+			rgn->region[i+1].size = rgn->region[i].size;
+		} else {
+			rgn->region[i+1].base = base;
+			rgn->region[i+1].size = size;
+			break;
+		}
+	}
+
+	if (base < rgn->region[0].base) {
+		rgn->region[0].base = base;
+		rgn->region[0].size = size;
+	}
+	rgn->cnt++;
+
+	return 0;
+}
+
+long __init lmb_add(u64 base, u64 size)
+{
+	struct lmb_region *_rgn = &lmb.memory;
+
+	/* On pSeries LPAR systems, the first LMB is our RMO region. */
+	if (base == 0)
+		lmb.rmo_size = size;
+
+	return lmb_add_region(_rgn, base, size);
+
+}
+
+long __init lmb_reserve(u64 base, u64 size)
+{
+	struct lmb_region *_rgn = &lmb.reserved;
+
+	BUG_ON(0 == size);
+
+	return lmb_add_region(_rgn, base, size);
+}
+
+long __init lmb_overlaps_region(struct lmb_region *rgn, u64 base, u64 size)
+{
+	unsigned long i;
+
+	for (i = 0; i < rgn->cnt; i++) {
+		u64 rgnbase = rgn->region[i].base;
+		u64 rgnsize = rgn->region[i].size;
+		if (lmb_addrs_overlap(base, size, rgnbase, rgnsize))
+			break;
+	}
+
+	return (i < rgn->cnt) ? i : -1;
+}
+
+static u64 lmb_align_down(u64 addr, u64 size)
+{
+	return addr & ~(size - 1);
+}
+
+static u64 lmb_align_up(u64 addr, u64 size)
+{
+	return (addr + (size - 1)) & ~(size - 1);
+}
+
+static u64 __init lmb_alloc_nid_unreserved(u64 start, u64 end,
+					   u64 size, u64 align)
+{
+	u64 base, res_base;
+	long j;
+
+	base = lmb_align_down((end - size), align);
+	while (start <= base) {
+		j = lmb_overlaps_region(&lmb.reserved, base, size);
+		if (j < 0) {
+			/* this area isn't reserved, take it */
+			if (lmb_add_region(&lmb.reserved, base,
+					   lmb_align_up(size, align)) < 0)
+				base = ~(u64)0;
+			return base;
+		}
+		res_base = lmb.reserved.region[j].base;
+		if (res_base < size)
+			break;
+		base = lmb_align_down(res_base - size, align);
+	}
+
+	return ~(u64)0;
+}
+
+static u64 __init lmb_alloc_nid_region(struct lmb_property *mp,
+				       u64 (*nid_range)(u64, u64, int *),
+				       u64 size, u64 align, int nid)
+{
+	u64 start, end;
+
+	start = mp->base;
+	end = start + mp->size;
+
+	start = lmb_align_up(start, align);
+	while (start < end) {
+		u64 this_end;
+		int this_nid;
+
+		this_end = nid_range(start, end, &this_nid);
+		if (this_nid == nid) {
+			u64 ret = lmb_alloc_nid_unreserved(start, this_end,
+							   size, align);
+			if (ret != ~(u64)0)
+				return ret;
+		}
+		start = this_end;
+	}
+
+	return ~(u64)0;
+}
+
+u64 __init lmb_alloc_nid(u64 size, u64 align, int nid,
+			 u64 (*nid_range)(u64 start, u64 end, int *nid))
+{
+	struct lmb_region *mem = &lmb.memory;
+	int i;
+
+	for (i = 0; i < mem->cnt; i++) {
+		u64 ret = lmb_alloc_nid_region(&mem->region[i],
+					       nid_range,
+					       size, align, nid);
+		if (ret != ~(u64)0)
+			return ret;
+	}
+
+	return lmb_alloc(size, align);
+}
+
+u64 __init lmb_alloc(u64 size, u64 align)
+{
+	return lmb_alloc_base(size, align, LMB_ALLOC_ANYWHERE);
+}
+
+u64 __init lmb_alloc_base(u64 size, u64 align, u64 max_addr)
+{
+	u64 alloc;
+
+	alloc = __lmb_alloc_base(size, align, max_addr);
+
+	if (alloc == 0)
+		panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n",
+		      (unsigned long long) size, (unsigned long long) max_addr);
+
+	return alloc;
+}
+
+u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr)
+{
+	long i, j;
+	u64 base = 0;
+	u64 res_base;
+
+	BUG_ON(0 == size);
+
+	/* On some platforms, make sure we allocate lowmem */
+	/* Note that LMB_REAL_LIMIT may be LMB_ALLOC_ANYWHERE */
+	if (max_addr == LMB_ALLOC_ANYWHERE)
+		max_addr = LMB_REAL_LIMIT;
+
+	for (i = lmb.memory.cnt - 1; i >= 0; i--) {
+		u64 lmbbase = lmb.memory.region[i].base;
+		u64 lmbsize = lmb.memory.region[i].size;
+
+		if (lmbsize < size)
+			continue;
+		if (max_addr == LMB_ALLOC_ANYWHERE)
+			base = lmb_align_down(lmbbase + lmbsize - size, align);
+		else if (lmbbase < max_addr) {
+			base = min(lmbbase + lmbsize, max_addr);
+			base = lmb_align_down(base - size, align);
+		} else
+			continue;
+
+		while (base && lmbbase <= base) {
+			j = lmb_overlaps_region(&lmb.reserved, base, size);
+			if (j < 0) {
+				/* this area isn't reserved, take it */
+				if (lmb_add_region(&lmb.reserved, base,
+						   size) < 0)
+					return 0;
+				return base;
+			}
+			res_base = lmb.reserved.region[j].base;
+			if (res_base < size)
+				break;
+			base = lmb_align_down(res_base - size, align);
+		}
+	}
+	return 0;
+}
+
+/* You must call lmb_analyze() before this. */
+u64 __init lmb_phys_mem_size(void)
+{
+	return lmb.memory.size;
+}
+
+u64 __init lmb_end_of_DRAM(void)
+{
+	int idx = lmb.memory.cnt - 1;
+
+	return (lmb.memory.region[idx].base + lmb.memory.region[idx].size);
+}
+
+/* You must call lmb_analyze() after this. */
+void __init lmb_enforce_memory_limit(u64 memory_limit)
+{
+	unsigned long i;
+	u64 limit;
+	struct lmb_property *p;
+
+	if (!memory_limit)
+		return;
+
+	/* Truncate the lmb regions to satisfy the memory limit. */
+	limit = memory_limit;
+	for (i = 0; i < lmb.memory.cnt; i++) {
+		if (limit > lmb.memory.region[i].size) {
+			limit -= lmb.memory.region[i].size;
+			continue;
+		}
+
+		lmb.memory.region[i].size = limit;
+		lmb.memory.cnt = i + 1;
+		break;
+	}
+
+	if (lmb.memory.region[0].size < lmb.rmo_size)
+		lmb.rmo_size = lmb.memory.region[0].size;
+
+	/* And truncate any reserves above the limit also. */
+	for (i = 0; i < lmb.reserved.cnt; i++) {
+		p = &lmb.reserved.region[i];
+
+		if (p->base > memory_limit)
+			p->size = 0;
+		else if ((p->base + p->size) > memory_limit)
+			p->size = memory_limit - p->base;
+
+		if (p->size == 0) {
+			lmb_remove_region(&lmb.reserved, i);
+			i--;
+		}
+	}
+}
+
+int __init lmb_is_reserved(u64 addr)
+{
+	int i;
+
+	for (i = 0; i < lmb.reserved.cnt; i++) {
+		u64 upper = lmb.reserved.region[i].base +
+			lmb.reserved.region[i].size - 1;
+		if ((addr >= lmb.reserved.region[i].base) && (addr <= upper))
+			return 1;
+	}
+	return 0;
+}