diff --git a/hw/acpi/memory_hotplug_acpi_table.c b/hw/acpi/memory_hotplug_acpi_table.c
index c74da76..a410619 100644
--- a/hw/acpi/memory_hotplug_acpi_table.c
+++ b/hw/acpi/memory_hotplug_acpi_table.c
@@ -16,6 +16,11 @@
 #define MEMORY_SLOT_OST_STATUS       "MOSC"
 #define MEMORY_SLOT_EJECT_METHOD     "MEJ0"
 #define MEMORY_SLOT_EJECT            "MEJ"
+#define MEMORY_SLOT_CRS_METHOD       "MCRS"
+#define MEMORY_SLOT_ADDR             "MRB"
+#define MEMORY_SLOT_SIZE             "MRL"
+#define MEMORY_SLOT_LOCK             "MLCK"
+#define MEMORY_SLOT_SLECTOR          "MSEL"
 
 #define BASEPATH "\\_SB.PCI0." stringify(MEMORY_HOTPLUG_DEVICE) "."
 
@@ -36,8 +41,8 @@ void build_mhpt(GArray *table_data, GArray *linker, uint32_t nr_mem,
         Aml *crs, *field;
         Aml *a_slot_arg = aml_arg(0);
         Aml *a_ret_val = aml_local(0);
-        Aml *a_ctrl_lock = aml_name(stringify(MEMORY_SLOT_LOCK));
-        Aml *a_slot_selector = aml_name(stringify(MEMORY_SLOT_SLECTOR));
+        Aml *a_ctrl_lock = aml_name(MEMORY_SLOT_LOCK);
+        Aml *a_slot_selector = aml_name(MEMORY_SLOT_SLECTOR);
 
         crs = aml_resource_template();
         aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 0, io_len));
@@ -51,13 +56,9 @@ void build_mhpt(GArray *table_data, GArray *linker, uint32_t nr_mem,
         field = aml_field(stringify(MEMORY_HOTPLUG_IO_REGION), AML_DWORD_ACC,
                           AML_PRESERVE);
         aml_append(field, /* read only */
-            aml_named_field(stringify(MEMORY_SLOT_ADDR_LOW), 32));
+            aml_named_field(MEMORY_SLOT_ADDR, 64));
         aml_append(field, /* read only */
-            aml_named_field(stringify(MEMORY_SLOT_ADDR_HIGH), 32));
-        aml_append(field, /* read only */
-            aml_named_field(stringify(MEMORY_SLOT_SIZE_LOW), 32));
-        aml_append(field, /* read only */
-            aml_named_field(stringify(MEMORY_SLOT_SIZE_HIGH), 32));
+            aml_named_field(MEMORY_SLOT_SIZE, 64));
         aml_append(field, /* read only */
             aml_named_field(MEMORY_SLOT_PROXIMITY, 32));
         aml_append(ctrl_dev, field);
@@ -81,7 +82,7 @@ void build_mhpt(GArray *table_data, GArray *linker, uint32_t nr_mem,
         field = aml_field(stringify(MEMORY_HOTPLUG_IO_REGION), AML_DWORD_ACC,
                           AML_PRESERVE);
         aml_append(field, /* DIMM selector, write only */
-            aml_named_field(stringify(MEMORY_SLOT_SLECTOR), 32));
+            aml_named_field(MEMORY_SLOT_SLECTOR, 32));
         aml_append(field, /* _OST event code, write only */
             aml_named_field(MEMORY_SLOT_OST_EVENT, 32));
         aml_append(field, /* _OST status code, write only */
@@ -91,7 +92,7 @@ void build_mhpt(GArray *table_data, GArray *linker, uint32_t nr_mem,
         /* present, functioning, decoding, not shown in UI */
         aml_append(ctrl_dev, aml_name_decl("_STA", aml_int(0xB)));
 
-        aml_append(ctrl_dev, aml_mutex(stringify(MEMORY_SLOT_LOCK), 0));
+        aml_append(ctrl_dev, aml_mutex(MEMORY_SLOT_LOCK, 0));
 
         method = aml_method(stringify(MEMORY_SLOT_SCAN_METHOD), 0);
         {
@@ -179,6 +180,43 @@ void build_mhpt(GArray *table_data, GArray *linker, uint32_t nr_mem,
             aml_append(method, aml_release(a_ctrl_lock));
         }
         aml_append(ctrl_dev, method);
+
+        method = aml_method(MEMORY_SLOT_CRS_METHOD, 1);
+        {
+            Aml *a_mr64 = aml_name("MR64");
+            Aml *a_crs_tmpl = aml_resource_template();
+            Aml *a_min = aml_name("MIN");
+            Aml *a_max =  aml_name("MAX");
+            Aml *a_len = aml_name("LEN");
+
+            aml_append(method, aml_acquire(a_ctrl_lock, 0xFFFF));
+            aml_append(method, aml_store(a_slot_arg, a_slot_selector));
+
+            aml_append(a_crs_tmpl,
+                aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
+                                 AML_CACHEABLE, AML_READ_WRITE,
+                                 0, 0x0, 0xFFFFFFFFFFFFFFFE, 0,
+                                 0xFFFFFFFFFFFFFFFF));
+            aml_append(method, aml_name_decl("MR64", a_crs_tmpl));
+            aml_append(method,
+                aml_create_qword_field(a_mr64, aml_int(14), "MIN"));
+            aml_append(method,
+                aml_create_qword_field(a_mr64, aml_int(22), "MAX"));
+            aml_append(method,
+                aml_create_qword_field(a_mr64, aml_int(38), "LEN"));
+
+            aml_append(method, aml_store(aml_name(MEMORY_SLOT_ADDR), a_min));
+            aml_append(method, aml_store(aml_name(MEMORY_SLOT_SIZE), a_len));
+
+            aml_append(method, aml_store(
+                aml_add(a_min, aml_subtract(a_len, aml_int(1))),
+                a_max
+            ));
+
+            aml_append(method, aml_release(a_ctrl_lock));
+            aml_append(method, aml_return(a_mr64));
+        }
+        aml_append(ctrl_dev, method);
     }
     aml_append(table, ctrl_dev);
 
@@ -191,7 +229,7 @@ void build_mhpt(GArray *table_data, GArray *linker, uint32_t nr_mem,
         aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C80")));
 
         method = aml_method("_CRS", 0);
-        s = BASEPATH stringify(MEMORY_SLOT_CRS_METHOD);
+        s = BASEPATH MEMORY_SLOT_CRS_METHOD;
         aml_append(method, aml_return(aml_call1(s, aml_name("_UID"))));
         aml_append(dev, method);
 
diff --git a/hw/i386/acpi-dsdt-mem-hotplug.dsl b/hw/i386/acpi-dsdt-mem-hotplug.dsl
index 87d8d66..50b7541 100644
--- a/hw/i386/acpi-dsdt-mem-hotplug.dsl
+++ b/hw/i386/acpi-dsdt-mem-hotplug.dsl
@@ -19,77 +19,5 @@
         Device(MEMORY_HOTPLUG_DEVICE) {
             Name(_HID, "PNP0A06")
             Name(_UID, "Memory hotplug resources")
-
-            /* Memory hotplug IO registers */
-            External(MEMORY_SLOT_ADDR_LOW, FieldUnitObj) // read only
-            External(MEMORY_SLOT_ADDR_HIGH, FieldUnitObj) // read only
-            External(MEMORY_SLOT_SIZE_LOW, FieldUnitObj) // read only
-            External(MEMORY_SLOT_SIZE_HIGH, FieldUnitObj) // read only
-            External(MEMORY_SLOT_SLECTOR, FieldUnitObj) // DIMM selector, write only
-            External(MEMORY_SLOT_LOCK, MutexObj)
-
-            Method(MEMORY_SLOT_CRS_METHOD, 1, Serialized) {
-                Acquire(MEMORY_SLOT_LOCK, 0xFFFF)
-                Store(ToInteger(Arg0), MEMORY_SLOT_SLECTOR) // select DIMM
-
-                Name(MR64, ResourceTemplate() {
-                    QWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed,
-                    Cacheable, ReadWrite,
-                    0x0000000000000000,        // Address Space Granularity
-                    0x0000000000000000,        // Address Range Minimum
-                    0xFFFFFFFFFFFFFFFE,        // Address Range Maximum
-                    0x0000000000000000,        // Address Translation Offset
-                    0xFFFFFFFFFFFFFFFF,        // Address Length
-                    ,, MW64, AddressRangeMemory, TypeStatic)
-                })
-
-                CreateDWordField(MR64, 14, MINL)
-                CreateDWordField(MR64, 18, MINH)
-                CreateDWordField(MR64, 38, LENL)
-                CreateDWordField(MR64, 42, LENH)
-                CreateDWordField(MR64, 22, MAXL)
-                CreateDWordField(MR64, 26, MAXH)
-
-                Store(MEMORY_SLOT_ADDR_HIGH, MINH)
-                Store(MEMORY_SLOT_ADDR_LOW, MINL)
-                Store(MEMORY_SLOT_SIZE_HIGH, LENH)
-                Store(MEMORY_SLOT_SIZE_LOW, LENL)
-
-                // 64-bit math: MAX = MIN + LEN - 1
-                Add(MINL, LENL, MAXL)
-                Add(MINH, LENH, MAXH)
-                If (LLess(MAXL, MINL)) {
-                    Add(MAXH, One, MAXH)
-                }
-                If (LLess(MAXL, One)) {
-                    Subtract(MAXH, One, MAXH)
-                }
-                Subtract(MAXL, One, MAXL)
-
-                If (LEqual(MAXH, Zero)){
-                    Name(MR32, ResourceTemplate() {
-                        DWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed,
-                        Cacheable, ReadWrite,
-                        0x00000000,        // Address Space Granularity
-                        0x00000000,        // Address Range Minimum
-                        0xFFFFFFFE,        // Address Range Maximum
-                        0x00000000,        // Address Translation Offset
-                        0xFFFFFFFF,        // Address Length
-                        ,, MW32, AddressRangeMemory, TypeStatic)
-                    })
-                    CreateDWordField(MR32, MW32._MIN, MIN)
-                    CreateDWordField(MR32, MW32._MAX, MAX)
-                    CreateDWordField(MR32, MW32._LEN, LEN)
-                    Store(MINL, MIN)
-                    Store(MAXL, MAX)
-                    Store(LENL, LEN)
-
-                    Release(MEMORY_SLOT_LOCK)
-                    Return(MR32)
-                }
-
-                Release(MEMORY_SLOT_LOCK)
-                Return(MR64)
-            }
         } // Device()
     } // Scope()
diff --git a/include/hw/acpi/pc-hotplug.h b/include/hw/acpi/pc-hotplug.h
index 7198c90..29f0244 100644
--- a/include/hw/acpi/pc-hotplug.h
+++ b/include/hw/acpi/pc-hotplug.h
@@ -34,13 +34,6 @@
 
 #define MEMORY_HOTPLUG_DEVICE        MHPD
 #define MEMORY_HOTPLUG_IO_REGION     HPMR
-#define MEMORY_SLOT_ADDR_LOW         MRBL
-#define MEMORY_SLOT_ADDR_HIGH        MRBH
-#define MEMORY_SLOT_SIZE_LOW         MRLL
-#define MEMORY_SLOT_SIZE_HIGH        MRLH
-#define MEMORY_SLOT_SLECTOR          MSEL
-#define MEMORY_SLOT_LOCK             MLCK
-#define MEMORY_SLOT_CRS_METHOD       MCRS
 #define MEMORY_SLOT_SCAN_METHOD      MSCN
 
 #endif
