diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 4d5d7e3..355f9b7 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -346,24 +346,6 @@ static void acpi_align_size(GArray *blob, unsigned align)
     g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
 }
 
-/* Set a value within table in a safe manner */
-#define ACPI_BUILD_SET_LE(table, size, off, bits, val) \
-    do { \
-        uint64_t ACPI_BUILD_SET_LE_val = cpu_to_le64(val); \
-        memcpy(acpi_data_get_ptr(table, size, off, \
-                                 (bits) / BITS_PER_BYTE), \
-               &ACPI_BUILD_SET_LE_val, \
-               (bits) / BITS_PER_BYTE); \
-    } while (0)
-
-static inline void *acpi_data_get_ptr(uint8_t *table_data, unsigned table_size,
-                                      unsigned off, unsigned size)
-{
-    assert(off + size > off);
-    assert(off + size <= table_size);
-    return table_data + off;
-}
-
 static inline void acpi_add_table(GArray *table_offsets, GArray *table_data)
 {
     uint32_t offset = cpu_to_le32(table_data->len);
@@ -860,22 +842,6 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
     g_free(child);
 }
 
-static void patch_pci_windows(PcPciInfo *pci, uint8_t *start, unsigned size)
-{
-    ACPI_BUILD_SET_LE(start, size, acpi_pci32_start[0], 32, pci->w32.begin);
-
-    ACPI_BUILD_SET_LE(start, size, acpi_pci32_end[0], 32, pci->w32.end - 1);
-
-    if (pci->w64.end || pci->w64.begin) {
-        ACPI_BUILD_SET_LE(start, size, acpi_pci64_valid[0], 8, 1);
-        ACPI_BUILD_SET_LE(start, size, acpi_pci64_start[0], 64, pci->w64.begin);
-        ACPI_BUILD_SET_LE(start, size, acpi_pci64_end[0], 64, pci->w64.end - 1);
-        ACPI_BUILD_SET_LE(start, size, acpi_pci64_length[0], 64, pci->w64.end - pci->w64.begin);
-    } else {
-        ACPI_BUILD_SET_LE(start, size, acpi_pci64_valid[0], 8, 0);
-    }
-}
-
 static void
 build_ssdt(GArray *table_data, GArray *linker,
            AcpiCpuInfo *cpu, AcpiPmInfo *pm, AcpiMiscInfo *misc,
@@ -898,9 +864,59 @@ build_ssdt(GArray *table_data, GArray *linker,
     ssdt_ptr = acpi_data_push(ssdt->buf, sizeof(ssdp_misc_aml));
     memcpy(ssdt_ptr, ssdp_misc_aml, sizeof(ssdp_misc_aml));
 
-    patch_pci_windows(pci, ssdt_ptr, sizeof(ssdp_misc_aml));
-
     scope = aml_scope("\\_SB.PCI0");
+    /* build PCI0._CRS */
+    crs = aml_resource_template();
+    aml_append(crs,
+        aml_word_bus_number(aml_min_fixed, aml_max_fixed, aml_pos_decode,
+                            0x0000, 0x0000, 0x00FF, 0x0000, 0x0100));
+    aml_append(crs, aml_io(aml_decode16, 0x0CF8, 0x0CF8, 0x01, 0x08));
+
+    aml_append(crs,
+        aml_word_io(aml_min_fixed, aml_max_fixed,
+                    aml_pos_decode, aml_entire_range,
+                    0x0000, 0x0000, 0x0CF7, 0x0000, 0x0CF8));
+    if (ich9_lpc_find()) { /* Q35 */
+        aml_append(crs,
+            aml_word_io(aml_min_fixed, aml_max_fixed,
+                        aml_pos_decode, aml_entire_range,
+                        0x0000, 0x0D00, 0xFFFF, 0x0000, 0xF300));
+    } else { /* piix4 */
+        aml_append(crs,
+            aml_word_io(aml_min_fixed, aml_max_fixed,
+                        aml_pos_decode, aml_entire_range,
+                        0x0000, 0x0D00, 0xADFF, 0x0000, 0xA100));
+        aml_append(crs,
+            aml_word_io(aml_min_fixed, aml_max_fixed,
+                        aml_pos_decode, aml_entire_range,
+                        0x0000, 0xAE0F, 0xAEFF, 0x0000, 0x00F1));
+        aml_append(crs,
+            aml_word_io(aml_min_fixed, aml_max_fixed,
+                        aml_pos_decode, aml_entire_range,
+                        0x0000, 0xAF20, 0xAFDF, 0x0000, 0x00C0));
+        aml_append(crs,
+            aml_word_io(aml_min_fixed, aml_max_fixed,
+                        aml_pos_decode, aml_entire_range,
+                        0x0000, 0xAFE4, 0xFFFF, 0x0000, 0x501C));
+    }
+    aml_append(crs,
+        aml_dword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed,
+                         aml_cacheable, aml_ReadWrite,
+                         0, 0x000A0000, 0x000BFFFF, 0, 0x00020000));
+    aml_append(crs,
+        aml_dword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed,
+                         aml_non_cacheable, aml_ReadWrite,
+                         0, pci->w32.begin, pci->w32.end - 1, 0,
+                         pci->w32.end - pci->w32.begin));
+    if (pci->w64.begin) {
+        aml_append(crs,
+            aml_qword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed,
+                             aml_cacheable, aml_ReadWrite,
+                             0, pci->w64.begin, pci->w64.end - 1, 0,
+                             pci->w64.end - pci->w64.begin));
+    }
+    aml_append(scope, aml_name_decl("_CRS", crs));
+
     /* reserve PCIHP resources */
     if (pm->pcihp_io_len) {
         dev = aml_device("PHPR");
diff --git a/hw/i386/acpi-dsdt-pci-crs.dsl b/hw/i386/acpi-dsdt-pci-crs.dsl
deleted file mode 100644
index 4648e90..0000000
--- a/hw/i386/acpi-dsdt-pci-crs.dsl
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * 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.
-
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
-
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-/* PCI CRS (current resources) definition. */
-Scope(\_SB.PCI0) {
-
-    Name(CRES, ResourceTemplate() {
-        WordBusNumber(ResourceProducer, MinFixed, MaxFixed, PosDecode,
-            0x0000,             // Address Space Granularity
-            0x0000,             // Address Range Minimum
-            0x00FF,             // Address Range Maximum
-            0x0000,             // Address Translation Offset
-            0x0100,             // Address Length
-            ,, )
-        IO(Decode16,
-            0x0CF8,             // Address Range Minimum
-            0x0CF8,             // Address Range Maximum
-            0x01,               // Address Alignment
-            0x08,               // Address Length
-            )
-        BOARD_SPECIFIC_PCI_RESOURSES
-        DWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed, Cacheable, ReadWrite,
-            0x00000000,         // Address Space Granularity
-            0x000A0000,         // Address Range Minimum
-            0x000BFFFF,         // Address Range Maximum
-            0x00000000,         // Address Translation Offset
-            0x00020000,         // Address Length
-            ,, , AddressRangeMemory, TypeStatic)
-        DWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed, NonCacheable, ReadWrite,
-            0x00000000,         // Address Space Granularity
-            0xE0000000,         // Address Range Minimum
-            0xFEBFFFFF,         // Address Range Maximum
-            0x00000000,         // Address Translation Offset
-            0x1EC00000,         // Address Length
-            ,, PW32, AddressRangeMemory, TypeStatic)
-    })
-
-    Name(CR64, ResourceTemplate() {
-        QWordMemory(ResourceProducer, PosDecode, MinFixed, MaxFixed, Cacheable, ReadWrite,
-            0x00000000,          // Address Space Granularity
-            0x8000000000,        // Address Range Minimum
-            0xFFFFFFFFFF,        // Address Range Maximum
-            0x00000000,          // Address Translation Offset
-            0x8000000000,        // Address Length
-            ,, PW64, AddressRangeMemory, TypeStatic)
-    })
-
-    Method(_CRS, 0) {
-        /* Fields provided by dynamically created ssdt */
-        External(P0S, IntObj)
-        External(P0E, IntObj)
-        External(P1V, IntObj)
-        External(P1S, BuffObj)
-        External(P1E, BuffObj)
-        External(P1L, BuffObj)
-
-        /* fixup 32bit pci io window */
-        CreateDWordField(CRES, \_SB.PCI0.PW32._MIN, PS32)
-        CreateDWordField(CRES, \_SB.PCI0.PW32._MAX, PE32)
-        CreateDWordField(CRES, \_SB.PCI0.PW32._LEN, PL32)
-        Store(P0S, PS32)
-        Store(P0E, PE32)
-        Store(Add(Subtract(P0E, P0S), 1), PL32)
-
-        If (LEqual(P1V, Zero)) {
-            Return (CRES)
-        }
-
-        /* fixup 64bit pci io window */
-        CreateQWordField(CR64, \_SB.PCI0.PW64._MIN, PS64)
-        CreateQWordField(CR64, \_SB.PCI0.PW64._MAX, PE64)
-        CreateQWordField(CR64, \_SB.PCI0.PW64._LEN, PL64)
-        Store(P1S, PS64)
-        Store(P1E, PE64)
-        Store(P1L, PL64)
-        /* add window and return result */
-        ConcatenateResTemplate(CRES, CR64, Local0)
-        Return (Local0)
-    }
-}
diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
index a611e07..09b68f0 100644
--- a/hw/i386/acpi-dsdt.dsl
+++ b/hw/i386/acpi-dsdt.dsl
@@ -31,50 +31,6 @@ DefinitionBlock (
 
 #include "acpi-dsdt-dbug.dsl"
 
-
-/****************************************************************
- * PCI Bus definition
- ****************************************************************/
-#define BOARD_SPECIFIC_PCI_RESOURSES \
-     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
-         0x0000, \
-         0x0000, \
-         0x0CF7, \
-         0x0000, \
-         0x0CF8, \
-         ,, , TypeStatic) \
-     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
-         0x0000, \
-         0x0D00, \
-         0xADFF, \
-         0x0000, \
-         0xA100, \
-         ,, , TypeStatic) \
-     /* 0xae00-0xae0e hole for PCI hotplug, hw/acpi/piix4.c:PCI_HOTPLUG_ADDR */ \
-     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
-         0x0000, \
-         0xAE0F, \
-         0xAEFF, \
-         0x0000, \
-         0x00F1, \
-         ,, , TypeStatic) \
-     /* 0xaf00-0xaf1f hole for CPU hotplug, hw/acpi/piix4.c:PIIX4_PROC_BASE */ \
-     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
-         0x0000, \
-         0xAF20, \
-         0xAFDF, \
-         0x0000, \
-         0x00C0, \
-         ,, , TypeStatic) \
-     /* 0xafe0-0xafe3 hole for ACPI.GPE0, hw/acpi/piix4.c:GPE_BASE */ \
-     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
-         0x0000, \
-         0xAFE4, \
-         0xFFFF, \
-         0x0000, \
-         0x501C, \
-         ,, , TypeStatic)
-
     Scope(\_SB) {
         Device(PCI0) {
             Name(_HID, EisaId("PNP0A03"))
@@ -85,7 +41,6 @@ DefinitionBlock (
         }
     }
 
-#include "acpi-dsdt-pci-crs.dsl"
 #include "acpi-dsdt-hpet.dsl"
 
 
diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
index e1cee5d..3fb4b2f 100644
--- a/hw/i386/q35-acpi-dsdt.dsl
+++ b/hw/i386/q35-acpi-dsdt.dsl
@@ -48,23 +48,6 @@ DefinitionBlock (
 /****************************************************************
  * PCI Bus definition
  ****************************************************************/
-#define BOARD_SPECIFIC_PCI_RESOURSES \
-     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
-         0x0000, \
-         0x0000, \
-         0x0CD7, \
-         0x0000, \
-         0x0CD8, \
-         ,, , TypeStatic) \
-     /* 0xcd8-0xcf7 hole for CPU hotplug, hw/acpi/ich9.c:ICH9_PROC_BASE */ \
-     WordIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange, \
-         0x0000, \
-         0x0D00, \
-         0xFFFF, \
-         0x0000, \
-         0xF300, \
-         ,, , TypeStatic)
-
     Scope(\_SB) {
         Device(PCI0) {
             Name(_HID, EisaId("PNP0A08"))
@@ -131,7 +114,6 @@ DefinitionBlock (
         }
     }
 
-#include "acpi-dsdt-pci-crs.dsl"
 #include "acpi-dsdt-hpet.dsl"
 
 
diff --git a/hw/i386/ssdt-misc.dsl b/hw/i386/ssdt-misc.dsl
index 2588e30..8d61f21 100644
--- a/hw/i386/ssdt-misc.dsl
+++ b/hw/i386/ssdt-misc.dsl
@@ -18,23 +18,4 @@ ACPI_EXTRACT_ALL_CODE ssdp_misc_aml
 
 DefinitionBlock ("ssdt-misc.aml", "SSDT", 0x01, "BXPC", "BXSSDTSUSP", 0x1)
 {
-
-/****************************************************************
- * PCI memory ranges
- ****************************************************************/
-
-    Scope(\) {
-       ACPI_EXTRACT_NAME_DWORD_CONST acpi_pci32_start
-       Name(P0S, 0x12345678)
-       ACPI_EXTRACT_NAME_DWORD_CONST acpi_pci32_end
-       Name(P0E, 0x12345678)
-       ACPI_EXTRACT_NAME_BYTE_CONST acpi_pci64_valid
-       Name(P1V, 0x12)
-       ACPI_EXTRACT_NAME_BUFFER8 acpi_pci64_start
-       Name(P1S, Buffer() { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 })
-       ACPI_EXTRACT_NAME_BUFFER8 acpi_pci64_end
-       Name(P1E, Buffer() { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 })
-       ACPI_EXTRACT_NAME_BUFFER8 acpi_pci64_length
-       Name(P1L, Buffer() { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 })
-    }
 }
