--- src/nvidia_subr.c.orig  2013-03-02 17:43:26.000000000 +0400
+++ src/nvidia_subr.c   2013-03-02 17:44:28.000000000 +0400
@@ -12,6 +12,10 @@
 #include "os-interface.h"
 #include "nv.h"
 #include "nv-freebsd.h"
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+#include <dev/acpica/acpivar.h>
+

 #if defined(NVCPU_X86) && defined(NV_USE_OS_VM86_INT10CALL)
 #include <machine/vm86.h>
@@ -1491,7 +1495,45 @@
     NvU32 *pOutData
 )
 {
-    return RM_ERR_NOT_SUPPORTED;
+    device_t dev = nv->handle, bus;
+    ACPI_STATUS status;
+    union acpi_object *rom;
+    union acpi_object rom_arg[2];
+    struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL };
+    struct acpi_object_list input = { 2, rom_arg };
+    bus = dev;
+    do {
+       bus = device_get_parent(bus);
+    } while (bus != NULL && strcmp(device_get_name(bus), "acpi"));
+    if (!bus) {
+        printf("couldn't find acpi bus\n");
+        return RM_ERROR;
+    }
+    if (!strncmp(device_get_name(device_get_parent(dev)), "vgapci", 6)) {
+                dev = device_get_parent(dev);
+    } else printf("name is %s\n", device_get_name(device_get_parent(dev)));
+    rom_arg[0].Type = ACPI_TYPE_INTEGER;
+    rom_arg[0].Integer.Value = pInData[0];
+    rom_arg[1].Type = ACPI_TYPE_INTEGER;
+    rom_arg[1].Integer.Value = pInData[1];
+    status = ACPI_EVALUATE_OBJECT(bus, dev, "_ROM", &input, &output);
+    if (ACPI_FAILURE(status)) {
+       printf("Failed to do the rom truc %x\n", status);
+       return RM_ERROR;
+    } else {
+        rom = output.Pointer;
+        if (rom && (rom->Type == ACPI_TYPE_BUFFER) && (rom->Buffer.Length == pInData[1])) {
+                memcpy(pOutData, rom->Buffer.Pointer, rom->Buffer.Length);
+        } else {
+               printf("Invalid rom data\n");
+                free(output.Pointer, M_TEMP);
+                return RM_ERROR;
+        }
+               free(output.Pointer, M_TEMP);
+               return (RM_OK);
+        }
+
+   return (RM_ERROR);
 }

 void* NV_API_CALL nv_get_smu_state(void)