cpu/x86/smm: Define APM_CNT_NOOP_SMI

Old (!PARALLEL_MP) cpu bringup uses this as the first
control to do SMM relocation.

Change-Id: I4241120b00fac77f0491d37f05ba17763db1254e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42617
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/include/cpu/x86/smm.h

@@ -17,6 +17,7 @@
 #define SMM_SAVE_STATE_BEGIN(x) (SMM_ENTRY_OFFSET + (x))
 
 #define APM_CNT		0xb2
+#define APM_CNT_NOOP_SMI	0x00
 #define APM_CNT_CST_CONTROL	0x85
 #define APM_CNT_PST_CONTROL	0x80
 #define APM_CNT_ACPI_DISABLE	0x1e

src/soc/intel/broadwell/smi.c

@@ -72,7 +72,7 @@ static void __unused southbridge_trigger_smi(void)
 
 	/* raise an SMI interrupt */
 	printk(BIOS_SPEW, "  ... raise SMI#\n");
-	outb(0x00, 0xb2);
+	apm_control(APM_CNT_NOOP_SMI);
 }
 
 static void __unused southbridge_clear_smi_status(void)

src/southbridge/intel/i82801dx/smi.c

@@ -293,7 +293,7 @@ static void aseg_smm_relocate(void)
 
 	/* raise an SMI interrupt */
 	printk(BIOS_SPEW, "  ... raise SMI#\n");
-	outb(0x00, 0xb2);
+	apm_control(APM_CNT_NOOP_SMI);
 }
 
 static void aseg_smm_install(void)

src/southbridge/intel/i82801ix/smi.c

@@ -100,7 +100,7 @@ static void aseg_smm_relocate(void)
 
 	/* raise an SMI interrupt */
 	printk(BIOS_SPEW, "  ... raise SMI#\n");
-	outb(0x00, 0xb2);
+	apm_control(APM_CNT_NOOP_SMI);
 }
 
 static int smm_handler_copied = 0;

src/southbridge/intel/lynxpoint/smi.c

@@ -75,7 +75,7 @@ static void  __unused southbridge_trigger_smi(void)
 
 	/* raise an SMI interrupt */
 	printk(BIOS_SPEW, "  ... raise SMI#\n");
-	outb(0x00, 0xb2);
+	apm_control(APM_CNT_NOOP_SMI);
 }
 
 static void __unused southbridge_clear_smi_status(void)