--- qemu/roms/seabios/src/dev-i440fx.c	2018/04/24 18:27:24	1.1
+++ qemu/roms/seabios/src/dev-i440fx.c	2018/04/24 18:36:41	1.1.1.2
@@ -13,9 +13,23 @@
 #include "util.h" // dprintf
 #include "ioport.h" // outb
 #include "pci.h" // pci_config_writeb
+#include "pci_ids.h"
 #include "pci_regs.h" // PCI_INTERRUPT_LINE
+#include "acpi.h"
 #include "dev-i440fx.h"
 
+#define I440FX_PAM0     0x59
+
+void i440fx_bios_make_writable(u16 bdf, void *arg)
+{
+    make_bios_writable_intel(bdf, I440FX_PAM0);
+}
+
+void i440fx_bios_make_readonly(u16 bdf, void *arg)
+{
+    make_bios_readonly_intel(bdf, I440FX_PAM0);
+}
+
 /* PIIX3/PIIX4 PCI to ISA bridge */
 void piix_isa_bridge_init(u16 bdf, void *arg)
 {
@@ -55,3 +69,48 @@ void piix4_pm_init(u16 bdf, void *arg)
     pci_config_writel(bdf, 0x90, PORT_SMB_BASE | 1);
     pci_config_writeb(bdf, 0xd2, 0x09); /* enable SMBus io space */
 }
+
+#define PIIX4_ACPI_ENABLE       0xf1
+#define PIIX4_ACPI_DISABLE      0xf0
+#define PIIX4_GPE0_BLK          0xafe0
+#define PIIX4_GPE0_BLK_LEN      4
+
+void piix4_fadt_init(u16 bdf, void *arg)
+{
+    struct fadt_descriptor_rev1 *fadt = arg;
+    fadt->acpi_enable = PIIX4_ACPI_ENABLE;
+    fadt->acpi_disable = PIIX4_ACPI_DISABLE;
+    fadt->gpe0_blk = cpu_to_le32(PIIX4_GPE0_BLK);
+    fadt->gpe0_blk_len = PIIX4_GPE0_BLK_LEN;
+}
+
+#define I440FX_SMRAM    0x72
+#define PIIX_DEVACTB    0x58
+#define PIIX_APMC_EN    (1 << 25)
+
+// This code is hardcoded for PIIX4 Power Management device.
+void piix4_apmc_smm_init(u16 bdf, void *arg)
+{
+    int i440_bdf = pci_find_device(PCI_VENDOR_ID_INTEL
+                                   , PCI_DEVICE_ID_INTEL_82441);
+    if (i440_bdf < 0)
+        return;
+
+    /* check if SMM init is already done */
+    u32 value = pci_config_readl(bdf, PIIX_DEVACTB);
+    if (value & PIIX_APMC_EN)
+        return;
+
+    /* enable the SMM memory window */
+    pci_config_writeb(i440_bdf, I440FX_SMRAM, 0x02 | 0x48);
+
+    smm_save_and_copy();
+
+    /* enable SMI generation when writing to the APMC register */
+    pci_config_writel(bdf, PIIX_DEVACTB, value | PIIX_APMC_EN);
+
+    smm_relocate_and_restore();
+
+    /* close the SMM memory window and enable normal SMM */
+    pci_config_writeb(i440_bdf, I440FX_SMRAM, 0x02 | 0x08);
+}