1 files changed, 135 insertions, 0 deletions
diff --git a/sys/amd64/vmm/vmm_mem.c b/sys/amd64/vmm/vmm_mem.c
new file mode 100644
index 0000000..04f99b1
--- /dev/null
+++ b/sys/amd64/vmm/vmm_mem.c
@@ -0,0 +1,135 @@
+/*-
+ * Copyright (c) 2011 NetApp, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/linker.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_page.h>
+#include <vm/vm_pageout.h>
+
+#include <machine/md_var.h>
+#include <machine/metadata.h>
+#include <machine/pc/bios.h>
+#include <machine/vmparam.h>
+#include <machine/pmap.h>
+
+#include "vmm_util.h"
+#include "vmm_mem.h"
+
+SYSCTL_DECL(_hw_vmm);
+
+static u_long pages_allocated;
+SYSCTL_ULONG(_hw_vmm, OID_AUTO, pages_allocated, CTLFLAG_RD,
+	     &pages_allocated, 0, "4KB pages allocated");
+
+static void
+update_pages_allocated(int howmany)
+{
+	pages_allocated += howmany;	/* XXX locking? */
+}
+
+int
+vmm_mem_init(void)
+{
+
+	return (0);
+}
+
+vm_paddr_t
+vmm_mem_alloc(size_t size)
+{
+	int flags;
+	vm_page_t m;
+	vm_paddr_t pa;
+
+	if (size != PAGE_SIZE)
+		panic("vmm_mem_alloc: invalid allocation size %lu", size);
+
+	flags = VM_ALLOC_NORMAL | VM_ALLOC_NOOBJ | VM_ALLOC_WIRED |
+		VM_ALLOC_ZERO;
+
+	while (1) {
+		/*
+		 * XXX need policy to determine when to back off the allocation
+		 */
+		m = vm_page_alloc(NULL, 0, flags);
+		if (m == NULL)
+			VM_WAIT;
+		else
+			break;
+	}
+
+	pa = VM_PAGE_TO_PHYS(m);
+	
+	if ((m->flags & PG_ZERO) == 0)
+		pagezero((void *)PHYS_TO_DMAP(pa));
+	m->valid = VM_PAGE_BITS_ALL;
+
+	update_pages_allocated(1);
+
+	return (pa);
+}
+
+void
+vmm_mem_free(vm_paddr_t base, size_t length)
+{
+	vm_page_t m;
+
+	if (base & PAGE_MASK) {
+		panic("vmm_mem_free: base 0x%0lx must be aligned on a "
+		      "0x%0x boundary\n", base, PAGE_SIZE);
+	}
+
+	if (length != PAGE_SIZE)
+		panic("vmm_mem_free: invalid length %lu", length);
+
+	m = PHYS_TO_VM_PAGE(base);
+	m->wire_count--;
+	vm_page_free(m);
+	atomic_subtract_int(&cnt.v_wire_count, 1);
+
+	update_pages_allocated(-1);
+}
+
+vm_paddr_t
+vmm_mem_maxaddr(void)
+{
+
+	return (ptoa(Maxmem));
+}