pc, i440fx: Make smm enable/disable function i440fx independent.

make cpu_smm_update() generic to be independent on i440fx by
registering a callback.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

3 files changed, 22 insertions, 5 deletions

diff --git a/hw/pc.c b/hw/pc.c
index 8842766313..691803f11e 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -68,7 +68,6 @@
 static FDCtrl *floppy_controller;
 static RTCState *rtc_state;
 static PITState *pit;
-static PCII440FXState *i440fx_state;
 
 #define E820_NR_ENTRIES		16
 
@@ -125,10 +124,22 @@ uint64_t cpu_get_tsc(CPUX86State *env)
 }
 
 /* SMM support */
+
+static cpu_set_smm_t smm_set;
+static void *smm_arg;
+
+void cpu_smm_register(cpu_set_smm_t callback, void *arg)
+{
+    assert(smm_set == NULL);
+    assert(smm_arg == NULL);
+    smm_set = callback;
+    smm_arg = arg;
+}
+
 void cpu_smm_update(CPUState *env)
 {
-    if (i440fx_state && env == first_cpu)
-        i440fx_set_smm(i440fx_state, (env->hflags >> HF_SMM_SHIFT) & 1);
+    if (smm_set && smm_arg && env == first_cpu)
+        smm_set(!!(env->hflags & HF_SMM_MASK), smm_arg);
 }
 
 
@@ -813,6 +824,7 @@ static void pc_init1(ram_addr_t ram_size,
     ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
     int bios_size, isa_bios_size;
     PCIBus *pci_bus;
+    PCII440FXState *i440fx_state;
     int piix3_devfn = -1;
     qemu_irq *cpu_irq;
     qemu_irq *isa_irq;
diff --git a/hw/pc.h b/hw/pc.h
index d11a576be0..77239a0571 100644
--- a/hw/pc.h
+++ b/hw/pc.h
@@ -80,6 +80,9 @@ extern int fd_bootchk;
 void ioport_set_a20(int enable);
 int ioport_get_a20(void);
 
+typedef void (*cpu_set_smm_t)(int smm, void *arg);
+void cpu_smm_register(cpu_set_smm_t callback, void *arg);
+
 /* acpi.c */
 extern int acpi_enabled;
 extern char *acpi_tables;
@@ -108,7 +111,6 @@ struct PCII440FXState;
 typedef struct PCII440FXState PCII440FXState;
 
 PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix_devfn, qemu_irq *pic, int ram_size);
-void i440fx_set_smm(PCII440FXState *d, int val);
 void i440fx_init_memory_mappings(PCII440FXState *d);
 
 /* piix4.c */
diff --git a/hw/piix_pci.c b/hw/piix_pci.c
index 97519dbb5f..aff7f6d467 100644
--- a/hw/piix_pci.c
+++ b/hw/piix_pci.c
@@ -114,8 +114,10 @@ static void i440fx_update_memory_mappings(PCII440FXState *d)
     }
 }
 
-void i440fx_set_smm(PCII440FXState *d, int val)
+static void i440fx_set_smm(int val, void *arg)
 {
+    PCII440FXState *d = arg;
+
     val = (val != 0);
     if (d->smm_enabled != val) {
         d->smm_enabled = val;
@@ -210,6 +212,7 @@ static int i440fx_initfn(PCIDevice *dev)
 
     d->dev.config[I440FX_SMRAM] = 0x02;
 
+    cpu_smm_register(&i440fx_set_smm, d);
     return 0;
 }