X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Flib%2Flmb.c;fp=qemu%2Froms%2Fu-boot%2Flib%2Flmb.c;h=081e4181b45c10c4980062eb5506ae4bfa0e4948;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/roms/u-boot/lib/lmb.c b/qemu/roms/u-boot/lib/lmb.c
new file mode 100644
index 000000000..081e4181b
--- /dev/null
+++ b/qemu/roms/u-boot/lib/lmb.c
@@ -0,0 +1,345 @@
+/*
+ * Procedures for maintaining information about logical memory blocks.
+ *
+ * Peter Bergner, IBM Corp.	June 2001.
+ * Copyright (C) 2001 Peter Bergner.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <lmb.h>
+
+#define LMB_ALLOC_ANYWHERE	0
+
+void lmb_dump_all(struct lmb *lmb)
+{
+#ifdef DEBUG
+	unsigned long i;
+
+	debug("lmb_dump_all:\n");
+	debug("    memory.cnt		   = 0x%lx\n", lmb->memory.cnt);
+	debug("    memory.size		   = 0x%llx\n",
+	      (unsigned long long)lmb->memory.size);
+	for (i=0; i < lmb->memory.cnt ;i++) {
+		debug("    memory.reg[0x%lx].base   = 0x%llx\n", i,
+			(long long unsigned)lmb->memory.region[i].base);
+		debug("		   .size   = 0x%llx\n",
+			(long long unsigned)lmb->memory.region[i].size);
+	}
+
+	debug("\n    reserved.cnt	   = 0x%lx\n",
+		lmb->reserved.cnt);
+	debug("    reserved.size	   = 0x%llx\n",
+		(long long unsigned)lmb->reserved.size);
+	for (i=0; i < lmb->reserved.cnt ;i++) {
+		debug("    reserved.reg[0x%lx].base = 0x%llx\n", i,
+			(long long unsigned)lmb->reserved.region[i].base);
+		debug("		     .size = 0x%llx\n",
+			(long long unsigned)lmb->reserved.region[i].size);
+	}
+#endif /* DEBUG */
+}
+
+static long lmb_addrs_overlap(phys_addr_t base1,
+		phys_size_t size1, phys_addr_t base2, phys_size_t size2)
+{
+	return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
+}
+
+static long lmb_addrs_adjacent(phys_addr_t base1, phys_size_t size1,
+		phys_addr_t base2, phys_size_t size2)
+{
+	if (base2 == base1 + size1)
+		return 1;
+	else if (base1 == base2 + size2)
+		return -1;
+
+	return 0;
+}
+
+static long lmb_regions_adjacent(struct lmb_region *rgn,
+		unsigned long r1, unsigned long r2)
+{
+	phys_addr_t base1 = rgn->region[r1].base;
+	phys_size_t size1 = rgn->region[r1].size;
+	phys_addr_t base2 = rgn->region[r2].base;
+	phys_size_t size2 = rgn->region[r2].size;
+
+	return lmb_addrs_adjacent(base1, size1, base2, size2);
+}
+
+static void 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 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 lmb_init(struct lmb *lmb)
+{
+	/* 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;
+	lmb->memory.size = 0;
+
+	/* Ditto. */
+	lmb->reserved.region[0].base = 0;
+	lmb->reserved.region[0].size = 0;
+	lmb->reserved.cnt = 1;
+	lmb->reserved.size = 0;
+}
+
+/* This routine called with relocation disabled. */
+static long lmb_add_region(struct lmb_region *rgn, phys_addr_t base, phys_size_t 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++) {
+		phys_addr_t rgnbase = rgn->region[i].base;
+		phys_size_t 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;
+}
+
+/* This routine may be called with relocation disabled. */
+long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size)
+{
+	struct lmb_region *_rgn = &(lmb->memory);
+
+	return lmb_add_region(_rgn, base, size);
+}
+
+long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size)
+{
+	struct lmb_region *rgn = &(lmb->reserved);
+	phys_addr_t rgnbegin, rgnend;
+	phys_addr_t end = base + size;
+	int i;
+
+	rgnbegin = rgnend = 0; /* supress gcc warnings */
+
+	/* Find the region where (base, size) belongs to */
+	for (i=0; i < rgn->cnt; i++) {
+		rgnbegin = rgn->region[i].base;
+		rgnend = rgnbegin + rgn->region[i].size;
+
+		if ((rgnbegin <= base) && (end <= rgnend))
+			break;
+	}
+
+	/* Didn't find the region */
+	if (i == rgn->cnt)
+		return -1;
+
+	/* Check to see if we are removing entire region */
+	if ((rgnbegin == base) && (rgnend == end)) {
+		lmb_remove_region(rgn, i);
+		return 0;
+	}
+
+	/* Check to see if region is matching at the front */
+	if (rgnbegin == base) {
+		rgn->region[i].base = end;
+		rgn->region[i].size -= size;
+		return 0;
+	}
+
+	/* Check to see if the region is matching at the end */
+	if (rgnend == end) {
+		rgn->region[i].size -= size;
+		return 0;
+	}
+
+	/*
+	 * We need to split the entry -  adjust the current one to the
+	 * beginging of the hole and add the region after hole.
+	 */
+	rgn->region[i].size = base - rgn->region[i].base;
+	return lmb_add_region(rgn, end, rgnend - end);
+}
+
+long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size)
+{
+	struct lmb_region *_rgn = &(lmb->reserved);
+
+	return lmb_add_region(_rgn, base, size);
+}
+
+long lmb_overlaps_region(struct lmb_region *rgn, phys_addr_t base,
+				phys_size_t size)
+{
+	unsigned long i;
+
+	for (i=0; i < rgn->cnt; i++) {
+		phys_addr_t rgnbase = rgn->region[i].base;
+		phys_size_t rgnsize = rgn->region[i].size;
+		if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
+			break;
+		}
+	}
+
+	return (i < rgn->cnt) ? i : -1;
+}
+
+phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align)
+{
+	return lmb_alloc_base(lmb, size, align, LMB_ALLOC_ANYWHERE);
+}
+
+phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, phys_addr_t max_addr)
+{
+	phys_addr_t alloc;
+
+	alloc = __lmb_alloc_base(lmb, size, align, max_addr);
+
+	if (alloc == 0)
+		printf("ERROR: Failed to allocate 0x%lx bytes below 0x%lx.\n",
+		      (ulong)size, (ulong)max_addr);
+
+	return alloc;
+}
+
+static phys_addr_t lmb_align_down(phys_addr_t addr, phys_size_t size)
+{
+	return addr & ~(size - 1);
+}
+
+static phys_addr_t lmb_align_up(phys_addr_t addr, ulong size)
+{
+	return (addr + (size - 1)) & ~(size - 1);
+}
+
+phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, phys_addr_t max_addr)
+{
+	long i, j;
+	phys_addr_t base = 0;
+	phys_addr_t res_base;
+
+	for (i = lmb->memory.cnt-1; i >= 0; i--) {
+		phys_addr_t lmbbase = lmb->memory.region[i].base;
+		phys_size_t 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,
+							lmb_align_up(size,
+								align)) < 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;
+}
+
+int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
+{
+	int i;
+
+	for (i = 0; i < lmb->reserved.cnt; i++) {
+		phys_addr_t 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;
+}
+
+void __board_lmb_reserve(struct lmb *lmb)
+{
+	/* please define platform specific board_lmb_reserve() */
+}
+void board_lmb_reserve(struct lmb *lmb) __attribute__((weak, alias("__board_lmb_reserve")));
+
+void __arch_lmb_reserve(struct lmb *lmb)
+{
+	/* please define platform specific arch_lmb_reserve() */
+}
+void arch_lmb_reserve(struct lmb *lmb) __attribute__((weak, alias("__arch_lmb_reserve")));