First shot at factoring SMM code into generic parts and southbridge specific

parts.

This should help to reduce the code duplication for Rudolf's K8/VIA SMM
implementation...

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Joseph Smith <joe@settoplinux.org>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3870 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/cpu/amd/model_10xxx/Config.lb

@@ -31,6 +31,7 @@ dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
 dir /cpu/x86/pae
+dir /cpu/x86/smm
 dir /cpu/amd/mtrr
 dir /cpu/amd/quadcore
 dir /cpu/amd/microcode

src/cpu/amd/model_fxx/Config.lb

@@ -12,6 +12,7 @@ dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
 dir /cpu/x86/pae
+dir /cpu/x86/smm
 dir /cpu/amd/mtrr
 dir /cpu/amd/dualcore
 dir /cpu/amd/microcode

src/cpu/amd/model_gx1/Config.lb

@@ -3,4 +3,5 @@ dir /cpu/x86/fpu
 dir /cpu/x86/mmx
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 driver model_gx1_init.o

src/cpu/amd/model_gx2/Config.lb

@@ -3,6 +3,7 @@ dir /cpu/x86/fpu
 dir /cpu/x86/mmx
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 driver model_gx2_init.o
 object cpubug.o
 object vsmsetup.o

src/cpu/amd/model_lx/Config.lb

@@ -3,6 +3,7 @@ dir /cpu/x86/fpu
 dir /cpu/x86/mmx
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 driver model_lx_init.o
 object cpubug.o
 object vsmsetup.o

src/cpu/intel/ep80579/Config.lb

@@ -26,5 +26,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver ep80579_init.o

src/cpu/intel/model_69x/Config.lb

@@ -5,5 +5,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver model_69x_init.o

src/cpu/intel/model_6dx/Config.lb

@@ -5,5 +5,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver model_6dx_init.o

src/cpu/intel/model_6ex/Config.lb

@@ -8,6 +8,7 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 dir /cpu/intel/hyperthreading
 driver model_6ex_init.o

src/cpu/intel/model_6fx/Config.lb

@@ -8,6 +8,7 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 dir /cpu/intel/hyperthreading
 driver model_6fx_init.o

src/cpu/intel/model_6xx/Config.lb

@@ -5,5 +5,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver model_6xx_init.o

src/cpu/intel/model_f0x/Config.lb

@@ -7,5 +7,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver model_f0x_init.o

src/cpu/intel/model_f1x/Config.lb

@@ -7,5 +7,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver model_f1x_init.o

src/cpu/intel/model_f2x/Config.lb

@@ -7,6 +7,7 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 dir /cpu/intel/hyperthreading
 driver model_f2x_init.o

src/cpu/intel/model_f3x/Config.lb

@@ -7,6 +7,7 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 dir /cpu/intel/hyperthreading
 driver model_f3x_init.o

src/cpu/intel/model_f4x/Config.lb

@@ -7,6 +7,7 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 dir /cpu/intel/hyperthreading
 driver model_f4x_init.o

src/cpu/via/model_c3/Config.lb

@@ -26,5 +26,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver model_c3_init.o

src/cpu/via/model_c7/Config.lb

@@ -26,5 +26,6 @@ dir /cpu/x86/mmx
 dir /cpu/x86/sse
 dir /cpu/x86/lapic
 dir /cpu/x86/cache
+dir /cpu/x86/smm
 dir /cpu/intel/microcode
 driver model_c7_init.o

src/cpu/x86/smm/Config.lb

@@ -0,0 +1,47 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2008 coresystems GmbH
+##
+## 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, write to the Free Software
+## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+##
+
+uses HAVE_SMI_HANDLER
+
+if HAVE_SMI_HANDLER
+	object smmrelocate.S
+
+	smmobject smmhandler.S
+	smmobject smihandler.o
+
+	makerule smm.o
+		depends	"$(SMM-OBJECTS) printk.o vtxprintf.o $(LIBGCC_FILE_NAME)" 
+		action	"$(CC) $(DISTRO_LFLAGS) -nostdlib -r -o $@ $(SMM-OBJECTS) printk.o vtxprintf.o $(LIBGCC_FILE_NAME)"
+	end
+
+	makerule smm
+		depends	"smm.o $(TOP)/src/cpu/x86/smm/smm.ld ldoptions" 
+		action	"$(CC) $(DISTRO_LFLAGS) -nostdlib -nostartfiles -static -o smm.elf -T $(TOP)/src/cpu/x86/smm/smm.ld smm.o"
+		action 	"$(CROSS_COMPILE)nm -n smm.elf | sort > smm.map"
+		action  "$(OBJCOPY) -O binary smm.elf smm"
+	end
+
+	makerule smm_bin.c
+		depends "smm"
+		action "(echo 'unsigned char smm[] = {'; od -vtx1 smm | sed -e 's,^[0-9]* *,,' -e 's:[0-9a-f][0-9a-f] :0x&,:g' -e 's:[0-9a-f][0-9a-f]$$:0x&,:'; echo '}; unsigned int smm_len = '; wc -c smm |awk '{print $$1;}' ; echo ';')  > smm_bin.c"
+	end
+
+	object ./smm_bin.o
+end

src/cpu/x86/smm/smihandler.c

@@ -0,0 +1,203 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008 coresystems GmbH
+ *
+ * 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; version 2 of
+ * the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <arch/io.h>
+#include <arch/romcc_io.h>
+#include <console/console.h>
+#include <cpu/x86/cache.h>
+#include <cpu/x86/smm.h>
+
+void southbridge_smi_set_eos(void);
+
+#define DEBUG_SMI
+
+typedef enum { SMI_LOCKED, SMI_UNLOCKED } smi_semaphore;
+
+/* SMI multiprocessing semaphore */
+static volatile smi_semaphore smi_handler_status = SMI_UNLOCKED;
+
+static int smi_obtain_lock(void)
+{
+	u8 ret = SMI_LOCKED;
+
+	asm volatile (
+		"movb %2, %%al\n"
+		"xchgb %%al, %1\n"
+		"movb %%al, %0\n"
+		: "=g" (ret), "=m" (smi_handler_status)
+		: "g" (SMI_LOCKED)
+		: "eax"
+	);
+
+	return (ret == SMI_UNLOCKED);
+}
+
+static void smi_release_lock(void)
+{
+	asm volatile (
+		"movb %1, %%al\n"
+		"xchgb %%al, %0\n"
+		: "=m" (smi_handler_status)
+		: "g" (SMI_UNLOCKED)
+		: "eax"
+	);
+}
+
+#define LAPIC_ID 0xfee00020
+static inline __attribute__((always_inline)) unsigned long nodeid(void)
+{
+	return (*((volatile unsigned long *)(LAPIC_ID)) >> 24);
+}
+
+/* ********************* smi_util ************************* */
+
+/* Data */
+#define UART_RBR 0x00
+#define UART_TBR 0x00
+
+/* Control */
+#define UART_IER 0x01
+#define UART_IIR 0x02
+#define UART_FCR 0x02
+#define UART_LCR 0x03
+#define UART_MCR 0x04
+#define UART_DLL 0x00
+#define UART_DLM 0x01
+
+/* Status */
+#define UART_LSR 0x05
+#define UART_MSR 0x06
+#define UART_SCR 0x07
+
+static int uart_can_tx_byte(void)
+{
+	return inb(TTYS0_BASE + UART_LSR) & 0x20;
+}
+
+static void uart_wait_to_tx_byte(void)
+{
+	while(!uart_can_tx_byte()) 
+	;
+}
+
+static void uart_wait_until_sent(void)
+{
+	while(!(inb(TTYS0_BASE + UART_LSR) & 0x40))
+	; 
+}
+
+static void uart_tx_byte(unsigned char data)
+{
+	uart_wait_to_tx_byte();
+	outb(data, TTYS0_BASE + UART_TBR);
+	/* Make certain the data clears the fifos */
+	uart_wait_until_sent();
+}
+
+void console_tx_flush(void)
+{
+	uart_wait_to_tx_byte();
+}
+
+void console_tx_byte(unsigned char byte)
+{
+	if (byte == '\n')
+		uart_tx_byte('\r');
+	uart_tx_byte(byte);
+}
+
+/* ********************* smi_util ************************* */
+
+
+void io_trap_handler(int smif)
+{
+	southbridge_io_trap_handler(smif);
+}
+
+/**
+ * @brief Set the EOS bit
+ */
+static void smi_set_eos(void)
+{
+	southbridge_smi_set_eos();
+}
+
+/**
+ * @brief Interrupt handler for SMI#
+ *
+ * @param smm_revision revision of the smm state save map
+ */
+
+void smi_handler(u32 smm_revision)
+{
+	u8 reg8;
+	u16 pmctrl;
+	u16 pm1_sts;
+	u32 smi_sts, gpe0_sts, tco_sts;
+	unsigned int node;
+	smm_state_save_area_t state_save;
+
+	/* Are we ok to execute the handler? */
+	if (!smi_obtain_lock())
+		return;
+
+	node=nodeid();
+
+#ifdef DEBUG_SMI
+	console_loglevel = DEFAULT_CONSOLE_LOGLEVEL;
+#else
+	console_loglevel = 1;
+#endif
+
+	printk_debug("\nSMI# #%d\n", node);
+
+	switch (smm_revision) {
+	case 0x00030007:
+		state_save.type = LEGACY;
+		state_save.legacy_state_save = (legacy_smm_state_save_area_t *)
+			(0xa8000 + 0x7e00 - (node * 0x400));
+		break;
+	case 0x00030100:
+		state_save.type = EM64T;
+		state_save.em64t_state_save = (em64t_smm_state_save_area_t *)
+			(0xa8000 + 0x7d00 - (node * 0x400));
+		break;
+	case 0x00030064:
+		state_save.type = AMD64;
+		state_save.amd64_state_save = (amd64_smm_state_save_area_t *)
+			(0xa8000 + 0x7e00 - (node * 0x400));
+		break;
+	default:
+		printk_debug("smm_revision: 0x%08x\n", smm_revision);
+		printk_debug("SMI# not supported on your CPU\n");
+		/* Don't release lock, so no further SMI will happen,
+		 * if we don't handle it anyways.
+		 */
+		return;
+	}
+
+	southbridge_smi_handler(node, &state_save);
+
+	smi_release_lock();
+
+	/* De-assert SMI# signal to allow another SMI */
+	smi_set_eos();
+}

src/southbridge/intel/i82801gx/Config.lb

@@ -18,6 +18,8 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 ##
 
+uses HAVE_SMI_HANDLER
+
 config chip.h
 driver i82801gx.o
 driver i82801gx_ac97.o
@@ -33,34 +35,7 @@ driver i82801gx_usb_ehci.o
 object i82801gx_reset.o
 object i82801gx_watchdog.o
 
-object i82801gx_smi.o
+if HAVE_SMI_HANDLER
-object smmrelocate.S
+	object i82801gx_smi.o
-
+	smmobject i82801gx_smihandler.o
-makerule smmhandler.o
-	depends	"$(TOP)/src/southbridge/intel/i82801gx/smmhandler.S" 
-	action	"@$(CC) -c $(CPU_OPT) $(CPPFLAGS) $(CFLAGS) -o $@ $<"
 end
-
-makerule smihandler.o
-	depends	"$(TOP)/src/southbridge/intel/i82801gx/smihandler.c" 
-	action	"@$(CC) -c $(CPU_OPT) $(CPPFLAGS) $(CFLAGS) -o $@ $<"
-end
-
-makerule smm.o
-	depends	"smmhandler.o smihandler.o printk.o vtxprintf.o $(LIBGCC_FILE_NAME)" 
-	action	"$(CC) $(DISTRO_LFLAGS) -nostdlib -r -o $@ smmhandler.o smihandler.o printk.o vtxprintf.o $(LIBGCC_FILE_NAME)"
-end
-
-makerule smm
-	depends	"smm.o $(TOP)/src/southbridge/intel/i82801gx/smm.ld ldoptions" 
-	action	"$(CC) $(DISTRO_LFLAGS) -nostdlib -nostartfiles -static -o smm.elf -T $(TOP)/src/southbridge/intel/i82801gx/smm.ld smm.o"
-	action 	"$(CROSS_COMPILE)nm -n smm.elf | sort > smm.map"
-	action  "$(OBJCOPY) -O binary smm.elf smm"
-end
-
-makerule smm_bin.c
-	depends "smm"
-	action "(echo 'unsigned char smm[] = {'; od -vtx1 smm | sed -e 's,^[0-9]* *,,' -e 's:[0-9a-f][0-9a-f] :0x&,:g' -e 's:[0-9a-f][0-9a-f]$$:0x&,:'; echo '}; unsigned int smm_len = '; wc -c smm |awk '{print $$1;}' ; echo ';')  > smm_bin.c"
-end
-
-object ./smm_bin.o

src/southbridge/intel/i82801gx/i82801gx_lpc.c

@@ -197,6 +197,8 @@ static void enable_hpet(struct device *dev)
 	/* TODO */
 }
 
+
+#if HAVE_SMI_HANDLER
 static void i82801gx_lock_smm(struct device *dev)
 {
 	void smm_lock(void);
@@ -243,6 +245,7 @@ static void i82801gx_lock_smm(struct device *dev)
 	printk_debug("Done.\n");
 #endif
 }
+#endif
 
 static void lpc_init(struct device *dev)
 {
@@ -276,7 +279,9 @@ static void lpc_init(struct device *dev)
 
 	setup_i8259();
 
+#if HAVE_SMI_HANDLER
 	i82801gx_lock_smm(dev);
+#endif
 }
 
 static void i82801gx_lpc_read_resources(device_t dev)

src/southbridge/intel/i82801gx/i82801gx_smihandler.c

@@ -24,7 +24,7 @@
 #include <console/console.h>
 #include <cpu/x86/cache.h>
 #include <cpu/x86/smm.h>
-#include "chip.h"
+//#include "chip.h"
 
 // Future TODO: Move to i82801gx directory
 #include "../../../northbridge/intel/i945/ich7.h"
@@ -34,6 +34,7 @@
 #define ACPI_DISABLE	0x1e
 #define ACPI_ENABLE	0xe1
 
+
 /* I945 */
 #define SMRAM		0x9d
 #define   D_OPEN	(1 << 6)
@@ -84,45 +85,6 @@
  */
 static u16 pmbase = DEFAULT_PMBASE;
 
-typedef enum { SMI_LOCKED, SMI_UNLOCKED } smi_semaphore;
-
-/* SMI multiprocessing semaphore */
-static volatile smi_semaphore smi_handler_status = SMI_UNLOCKED;
-
-static int smi_obtain_lock(void)
-{
-	u8 ret = SMI_LOCKED;
-
-	asm volatile (
-		"movb %2, %%al\n"
-		"xchgb %%al, %1\n"
-		"movb %%al, %0\n"
-		: "=g" (ret), "=m" (smi_handler_status)
-		: "g" (SMI_LOCKED)
-		: "eax"
-	);
-
-	return (ret == SMI_UNLOCKED);
-}
-
-static void smi_release_lock(void)
-{
-	asm volatile (
-		"movb %1, %%al\n"
-		"xchgb %%al, %0\n"
-		: "=m" (smi_handler_status)
-		: "g" (SMI_UNLOCKED)
-		: "eax"
-	);
-}
-
-#define LAPIC_ID 0xfee00020
-static inline __attribute__((always_inline)) unsigned long nodeid(void)
-{
-	return (*((volatile unsigned long *)(LAPIC_ID)) >> 24);
-}
-
-
 /**
  * @brief read and clear PM1_STS 
  * @return PM1_STS register
@@ -273,73 +235,13 @@ static void dump_tco_status(u32 tco_sts)
 }
 
 
-/* ********************* smi_util ************************* */
-
-/* Data */
-#define UART_RBR 0x00
-#define UART_TBR 0x00
-
-/* Control */
-#define UART_IER 0x01
-#define UART_IIR 0x02
-#define UART_FCR 0x02
-#define UART_LCR 0x03
-#define UART_MCR 0x04
-#define UART_DLL 0x00
-#define UART_DLM 0x01
-
-/* Status */
-#define UART_LSR 0x05
-#define UART_MSR 0x06
-#define UART_SCR 0x07
-
-static int uart_can_tx_byte(void)
-{
-	return inb(TTYS0_BASE + UART_LSR) & 0x20;
-}
-
-static void uart_wait_to_tx_byte(void)
-{
-	while(!uart_can_tx_byte()) 
-	;
-}
-
-static void uart_wait_until_sent(void)
-{
-	while(!(inb(TTYS0_BASE + UART_LSR) & 0x40))
-	; 
-}
-
-static void uart_tx_byte(unsigned char data)
-{
-	uart_wait_to_tx_byte();
-	outb(data, TTYS0_BASE + UART_TBR);
-	/* Make certain the data clears the fifos */
-	uart_wait_until_sent();
-}
-
-void console_tx_flush(void)
-{
-	uart_wait_to_tx_byte();
-}
-
-void console_tx_byte(unsigned char byte)
-{
-	if (byte == '\n')
-		uart_tx_byte('\r');
-	uart_tx_byte(byte);
-}
-
 /* We are using PCIe accesses for now
  *  1. the chipset can do it
  *  2. we don't need to worry about how we leave 0xcf8/0xcfc behind
  */
 #include "../../../northbridge/intel/i945/pcie_config.c"
 
-/* ********************* smi_util ************************* */
+void southbridge_io_trap_handler(int smif)
-
-
-void io_trap_handler(int smif)
 {
 	u8 reg8;
 	global_nvs_t *gnvs = (global_nvs_t *)0xc00;
@@ -374,7 +276,7 @@ void io_trap_handler(int smif)
 /**
  * @brief Set the EOS bit
  */
-static void smi_set_eos(void)
+void southbridge_smi_set_eos(void)
 {
 	u8 reg8;
 
@@ -389,48 +291,12 @@ static void smi_set_eos(void)
  * @param smm_revision revision of the smm state save map
  */
 
-void smi_handler(u32 smm_revision)
+void southbridge_smi_handler(unsigned int node, smm_state_save_area_t *state_save)
 {
 	u8 reg8;
 	u16 pmctrl;
 	u16 pm1_sts;
 	u32 smi_sts, gpe0_sts, tco_sts;
-	unsigned int node;
-	smm_state_save_area_t state_save;
-
-	/* Are we ok to execute the handler? */
-	if (!smi_obtain_lock())
-		return;
-
-	node=nodeid();
-
-#ifdef DEBUG_SMI
-	console_loglevel = DEFAULT_CONSOLE_LOGLEVEL;
-#else
-	console_loglevel = 1;
-#endif
-
-	printk_debug("\nSMI# #%d\n", node);
-
-	switch (smm_revision) {
-	case 0x00030007:
-		state_save.type = LEGACY;
-		state_save.legacy_state_save = (legacy_smm_state_save_area_t *)
-			(0xa8000 + 0x7e00 - (node * 0x400));
-		break;
-	case 0x00030100:
-		state_save.type = EM64T;
-		state_save.em64t_state_save = (em64t_smm_state_save_area_t *)
-			(0xa8000 + 0x7d00 - (node * 0x400));
-		break;
-	default:
-		printk_debug("smm_revision: 0x%08x\n", smm_revision);
-		printk_debug("SMI# not supported on your CPU\n");
-		/* Don't release lock, so no further SMI will happen,
-		 * if we don't handle it anyways.
-		 */
-		return;
-	}
 
 	pmbase = pcie_read_config16(PCI_DEV(0, 0x1f, 0), 0x40) & 0xfffc;
 	printk_spew("SMI#: pmbase = 0x%04x\n", pmbase);
@@ -543,9 +409,4 @@ void smi_handler(u32 smm_revision)
 		printk_debug("....\n");
 	}
 
-
-	smi_release_lock();
-
-	/* De-assert SMI# signal to allow another SMI */
-	smi_set_eos();
 }

util/newconfig/config.g

@@ -226,6 +226,9 @@ class romimage:
 		# driver files added by 'driver' directive
 		self.driverrules = {}
 
+		# smm object files added by 'smmobject' directive
+		self.smmobjectrules = {}
+
 		# loader scripts added by 'ldscript' directive
 		self.ldscripts = []
 
@@ -344,6 +347,9 @@ class romimage:
 	def adddriverrule(self, name):
 		self.addobjectdriver(self.driverrules, name)
 
+	def addsmmobjectrule(self, name):
+		self.addobjectdriver(self.smmobjectrules, name)
+
 	def getinitobjectrules(self):
 		return self.initobjectrules
 
@@ -371,6 +377,15 @@ class romimage:
 			return o
 		fatal("No such driver rule \"%s\"" % name)
 
+	def getsmmobjectrules(self):
+		return self.smmobjectrules
+
+	def getsmmobjectrule(self, name):
+		o = getdict(self.smmobjectrules, name)
+		if (o):
+			return o
+		fatal("No such smm object rule \"%s\"" % name)
+
 	def addldscript(self, path):
 		self.ldscripts.append(path)
 
@@ -1370,6 +1385,10 @@ def adddriver(driver_name):
 	global curimage
 	curimage.adddriverrule(driver_name)
 
+def addsmmobject(object_name):
+	global curimage
+	curimage.addsmmobjectrule(object_name)
+
 def target(name):
         global target_dir, target_name
 	print "Configuring TARGET %s" % name
@@ -1593,6 +1612,7 @@ parser Config:
     token PRINT:		'print'
     token REGISTER:		'register'
     token ROMIMAGE:		'romimage'
+    token SMMOBJECT:		'smmobject'
     token SOUTHBRIDGE:		'southbridge'
     token SUPERIO:		'superio'
     token TARGET:		'target'
@@ -1693,6 +1713,10 @@ parser Config:
 
     rule driver<<C>>:	DRIVER DIRPATH		{{ if (C): adddriver(DIRPATH)}}
 
+    rule smmobject<<C>>:
+    			SMMOBJECT DIRPATH	{{ if (C): addsmmobject(DIRPATH)}}
+
+
     rule dir<<C>>:	DIR DIRPATH 		{{ if (C): dodir(DIRPATH, 'Config.lb') }}
 
     rule default<<C>>:	DEFAULT ID EQ value	{{ if (C): setdefault(ID, value, 0) }}
@@ -1826,6 +1850,7 @@ parser Config:
 		| 	prtstmt<<C>>		{{ return prtstmt }}
 		|	register<<C>> 		{{ return register }}
 		|	device<<C>>		{{ return device }}
+		|	smmobject<<C>>		{{ return smmobject }}
 
     # ENTRY for parsing Config.lb file
     rule cfgfile:	(uses<<1>>)* 
@@ -2028,6 +2053,13 @@ def writeimagemakefile(image):
 		file.write("OBJECTS += %s\n" % (obj_name))
 		file.write("SOURCES += %s\n" % (obj_source))
 
+	for srule, smm in image.getsmmobjectrules().items():
+		s_name = smm[0]
+		s_source = smm[1]
+		file.write("SMM-OBJECTS += %s\n" % (s_name))
+		file.write("SOURCES += %s\n" % (s_source))
+
+
 	# for chip_target.c
 	file.write("OBJECTS += static.o\n")
 	file.write("SOURCES += static.c\n")
@@ -2104,6 +2136,23 @@ def writeimagemakefile(image):
 		file.write("\t$(CC) -c $(CFLAGS) -o $@ $<\n")
 		#file.write("%s\n" % objrule[2])
 
+	file.write("\n# smmobjectrules:\n")
+	for irule, smm in image.getsmmobjectrules().items():
+		source = topify(smm[1])
+		type = smm[2]
+		if (type  == 'S'):
+			# for .S, .o depends on .s
+			file.write("%s: %s.s\n" % (smm[0], smm[3]))
+        		file.write("\t$(CC) -c $(CPU_OPT) -o $@ $<\n")
+			# and .s depends on .S
+			file.write("%s.s: %s\n" % (smm[3], source))
+			# Note: next 2 lines are ONE output line!
+        		file.write("\t$(CPP) $(CPPFLAGS) $< ")
+			file.write(">$@.new && mv $@.new $@\n")
+		else:
+			file.write("%s: %s\n" % (smm[0], source))
+			file.write("\t$(CC) -c $(CFLAGS) -o $@ $<\n")
+
 	# special rule for chip_target.c
 	file.write("static.o: static.c\n")
 	file.write("\t$(CC) -c $(CFLAGS) -o $@ $<\n")