i82801gx: Kill unused TCG and SMI1

SMI1 is being written to but never read from.

Change-Id: I82c0800713e3093eb1317b5e1f6f228771134857
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6808
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/getac/p470/acpi/platform.asl

@@ -44,15 +44,6 @@ Method(TRAP, 1, Serialized)
 	Return (SMIF)		// Return value of SMI handler
 }
 
-/* SMI Function Trap */
-OperationRegion(SMI1, SystemMemory, 0xC0DEDEAD, 0x100)
-Field(SMI1, AnyAcc, NoLock, Preserve)
-{
-	BCMD,  8,
-	DID,  32,
-	INFO, 1024
-}
-
 /* The _PIC method is called by the OS to choose between interrupt
  * routing via the i8259 interrupt controller or the APIC.
  *
@@ -77,11 +68,6 @@ Method(_PTS,1)
 
 	Store(0, \_SB.ACFG)
 
-	// Are we going to S3?
-	If (LEqual(Arg0, 3)) {
-		Store (0x4c, BCMD)
-	}
-
 	// Are we going to S4?
 	If (Lequal(Arg0, 4)) {
 		TRAP(0xe7)
@@ -90,7 +76,6 @@ Method(_PTS,1)
 
 	// Are we going to S5?
 	If (Lequal(Arg0, 5)) {
-		Store (0x4b, BCMD)
 		TRAP(0xde)
 	}
 

src/mainboard/getac/p470/acpi_tables.c

@@ -163,7 +163,7 @@ unsigned long write_acpi_tables(unsigned long start)
 	acpi_header_t *dsdt;
 	acpi_header_t *ecdt;
 
-	void *gnvs, *smi1;
+	void *gnvs;
 
 	current = start;
 
@@ -268,22 +268,8 @@ unsigned long write_acpi_tables(unsigned long start)
 	current += 0x100;
 	ALIGN_CURRENT;
 
-	for (i=0; i < dsdt->length; i++) {
-		if (*(u32*)(((u32)dsdt) + i) == 0xC0DEDEAD) {
-			printk(BIOS_DEBUG, "ACPI: Patching up SMI1 area in DSDT at offset 0x%04x -> 0x%08x\n", i, (u32)current);
-			*(u32*)(((u32)dsdt) + i) = current; // 0x100 bytes
-			break;
-		}
-	}
-
-	/* Keep pointer around */
-	smi1 = (void *)current;
-
-	current += 0x100;
-	ALIGN_CURRENT;
-
 	/* And tell SMI about it */
-	smm_setup_structures(gnvs, NULL, smi1);
+	smm_setup_structures(gnvs, NULL, NULL);
 
 	/* We patched up the DSDT, so we need to recalculate the checksum */
 	dsdt->checksum = 0;

src/southbridge/intel/i82801gx/smi.c

@@ -387,7 +387,5 @@ void smm_setup_structures(void *gnvs, void *tcg, void *smi1)
 	 * after we relocated the GNVS, so this is not troublesome.
 	 */
 	*(u32 *)0x500 = (u32)gnvs;
-	*(u32 *)0x504 = (u32)tcg;
-	*(u32 *)0x508 = (u32)smi1;
 	outb(0xea, 0xb2);
 }

src/southbridge/intel/i82801gx/smihandler.c

@@ -49,8 +49,6 @@ u8 smm_initialized = 0;
  * by coreboot.
  */
 global_nvs_t *gnvs = (global_nvs_t *)0x0;
-void *tcg = (void *)0x0;
-void *smi1 = (void *)0x0;
 
 /**
  * @brief read and clear PM1_STS
@@ -407,10 +405,8 @@ static void southbridge_smi_apmc(unsigned int node, smm_state_save_area_t *state
 			return;
 		}
 		gnvs = *(global_nvs_t **)0x500;
-		tcg  = *(void **)0x504;
-		smi1 = *(void **)0x508;
 		smm_initialized = 1;
-		printk(BIOS_DEBUG, "SMI#: Setting up structures to %p, %p, %p\n", gnvs, tcg, smi1);
+		printk(BIOS_DEBUG, "SMI#: Setting up structures to %p\n", gnvs);
 		break;
 	default:
 		printk(BIOS_DEBUG, "SMI#: Unknown function APM_CNT=%02x\n", reg8);
@@ -558,18 +554,7 @@ static void southbridge_smi_monitor(unsigned int node, smm_state_save_area_t *st
 	/* IOTRAP(2) currently unused
 	 * IOTRAP(1) currently unused */
 
-	/* IOTRAP(0) SMIC */
+	/* IOTRAP(0) SMIC: currently unused  */
-	if (IOTRAP(0)) {
-		if (!(trap_cycle & (1 << 24))) { // It's a write
-			printk(BIOS_DEBUG, "SMI1 command\n");
-			data = RCBA32(0x1e18);
-			data &= mask;
-			// if (smi1)
-			// 	southbridge_smi_command(data);
-			// return;
-		}
-		// Fall through to debug
-	}
 
 	printk(BIOS_DEBUG, "  trapped io address = 0x%x\n", trap_cycle & 0xfffc);
 	for (i=0; i < 4; i++) if(IOTRAP(i)) printk(BIOS_DEBUG, "  TRAP = %d\n", i);