diff --git a/src/cpu/amd/model_gx2/vsmsetup.c b/src/cpu/amd/model_gx2/vsmsetup.c
index f981932a7b..69470d5b2b 100644
--- a/src/cpu/amd/model_gx2/vsmsetup.c
+++ b/src/cpu/amd/model_gx2/vsmsetup.c
@@ -194,8 +194,9 @@ static void real_mode_switch_call_vsm(unsigned long smm, unsigned long sysm)
 
 		/* Dump zeros in the other segregs */
 		"	mov	%ax, %es       	\n"
-		"	mov	%ax, %fs       	\n"
-		"	mov	%ax, %gs       	\n"
+		/* FixMe: Big real mode for gs, fs? */
+		//"	mov	%ax, %fs       	\n"
+		//"	mov	%ax, %gs       	\n"
 		"	mov	$0x40, %ax	\n"
 		"	mov	%ax, %ds	\n"
 		"	mov	%cx, %ax	\n"
@@ -256,13 +257,18 @@ void do_vsmbios(void)
 	/* this is the base of rom on the GX2 at present. At some point, this has to be 
 	  * much better parameterized 
 	  */
-	rom = 0xfff80000;
+	//rom = 0xfff80000;
+	rom = 0xfffc0000;
 
 	buf = (unsigned char *) rom;
-	printk_debug("buf %p *buf %d buf[256k] %d\n", buf, buf[0], buf[256*1024]);
-	printk_debug("buf[0x20] signature is %x:%x:%x:%x\n", buf[0x20] ,buf[0x21] ,buf[0x22],buf[0x23]);
-	/* check for post code at start of vsainit.bin. If you don't see it, don't bother. */
-	if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) || (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) {
+	printk_debug("buf %p *buf %d buf[256k] %d\n",
+		     buf, buf[0], buf[256*1024]);
+	printk_debug("buf[0x20] signature is %x:%x:%x:%x\n",
+		     buf[0x20] ,buf[0x21] ,buf[0x22],buf[0x23]);
+	/* check for post code at start of vsainit.bin. If you don't see it,
+	   don't bother. */
+	if ((buf[0x20] != 0xb0) || (buf[0x21] != 0x10) ||
+	    (buf[0x22] != 0xe6) || (buf[0x23] != 0x80)) {
 		printk_err("do_vsmbios: no vsainit.bin signature, skipping!\n");
 		return;
 	}
@@ -272,7 +278,6 @@ void do_vsmbios(void)
 	/* ecx gets smm, edx gets sysm */
 	printk_err("Call real_mode_switch_call_vsm\n");
 	real_mode_switch_call_vsm(0x10000026, 0x10000028);
-
 }
 
 
@@ -351,7 +356,7 @@ void callbiosint(void)
 		// - provides us with a temp for the %cr0 mods.
 		"	pushl	%eax	\n"
 		"	movb	$0xbb, %al\n"
-		"	outb		%al, $0x80\n"
+		"	outb	%al, $0x80\n"
 		"	movl    %cr0, %eax\n"
 		"	orl	$0x00000001, %eax\n" /* PE = 1 */
 		"	movl	%eax, %cr0\n"
@@ -365,8 +370,8 @@ void callbiosint(void)
 		"	mov	%ax, %fs          \n"
 		"	mov	%ax, %gs          \n"
 		"	mov	%ax, %ss          \n"
-		"	lidt	idtarg         \n"
-		"	call	biosint	\n"
+		"	lidt	idtarg         	\n"
+		"	call	biosint		\n"
 		// back to real mode ...
 		"	ljmp	$0x28, $__rms_16bit2\n"
 		"__rms_16bit2:			\n"
@@ -454,7 +459,7 @@ int biosint(unsigned long intnumber,
 	unsigned long cs; 
 	unsigned long flags;
 	int ret = -1;
-	
+
 	ip = cs_ip & 0xffff;
 	cs = cs_ip >> 16;
 	flags = stackflags;
@@ -466,6 +471,8 @@ int biosint(unsigned long intnumber,
 		     ebp, esp, edi, esi);
 	printk_debug("biosint:  ip 0x%x   cs 0x%x  flags 0x%x\n",
 		     ip, cs, flags);
+	printk_debug("biosint: gs 0x%x fs 0x%x ds 0x%x es 0x%x\n",
+		     gsfs >> 16, gsfs & 0xffff, dses >> 16, dses & 0xffff);
 
 	// cases in a good compiler are just as good as your own tables. 
 	switch (intnumber) {
diff --git a/src/mainboard/amd/rumba/auto.c b/src/mainboard/amd/rumba/auto.c
index 15b3606f0e..84c837bcc2 100644
--- a/src/mainboard/amd/rumba/auto.c
+++ b/src/mainboard/amd/rumba/auto.c
@@ -26,20 +26,70 @@ static inline int spd_read_byte(unsigned device, unsigned address)
 
 #include "northbridge/amd/gx2/raminit.h"
 
-static void sdram_set_spd_registers(const struct mem_controller *ctrl) {
+static inline unsigned int fls(unsigned int x)
+{
+        int r;
+
+        __asm__("bsfl %1,%0\n\t"
+                "jnz 1f\n\t"
+                "movl $32,%0\n"
+                "1:" : "=r" (r) : "g" (x));
+        return r;
+}
+
+static void sdram_set_spd_registers(const struct mem_controller *ctrl) 
+{
+	/* Total size of DIMM = 2^row address (byte 3) * 2^col address (byte 4) *
+	 *                      component Banks (byte 17) * module banks, side (byte 5) *
+	 *                      width in bits (byte 6,7)
+	 *                    = Density per side (byte 31) * number of sides (byte 5) */
+	/* 1. Initialize GLMC registers base on SPD values, do one DIMM for now */
 	msr_t msr;
-	/* 1. Initialize GLMC registers base on SPD values,
-	 * Hard coded as XpressROM for now */
-	//print_debug("sdram_enable step 1\r\n");
-	msr = rdmsr(0x20000018);
-	msr.hi = 0x10076013;
+	unsigned char module_banks, val;
+
+	msr = rdmsr(MC_CF07_DATA);
+
+	/* get module banks (sides) per dimm, SPD byte 5 */
+	module_banks = spd_read_byte(0xA0, 5);
+	if (module_banks < 1 || module_banks > 2)
+		print_err("Module banks per dimm\r\n");
+	module_banks >>= 1;
+	msr.hi &= ~(1 << CF07_UPPER_D0_MB_SHIFT);
+	msr.hi |= (module_banks << CF07_UPPER_D0_MB_SHIFT);
+
+	/* get component banks per module bank, SPD byte 17 */
+	val = spd_read_byte(0xA0, 17);
+	if (val < 2 || val > 4)
+		print_err("Component banks per module bank\r\n");
+	val >>= 2;
+	msr.hi &= ~(0x1 << CF07_UPPER_D0_CB_SHIFT);
+	msr.hi |=  (val << CF07_UPPER_D0_CB_SHIFT);
+
+	/* get the module bank density, SPD byte 31  */
+	val = spd_read_byte(0xA0, 31);
+	val = fls(val);
+	val <<= module_banks;
+	msr.hi &= ~(0xf << CF07_UPPER_D0_SZ_SHIFT);
+	msr.hi |=  (val << CF07_UPPER_D0_SZ_SHIFT);
+
+	/* page size = 2^col address */
+	val = spd_read_byte(0xA0, 4);
+	val -= 7;
+	msr.hi &= ~(0x7 << CF07_UPPER_D0_PSZ_SHIFT);
+	msr.hi |=  (val << CF07_UPPER_D0_PSZ_SHIFT);
+
+	print_debug("computed msr.hi ");
+	print_debug_hex32(msr.hi);
+	print_debug("\r\n");
+
 	msr.lo = 0x00003000;
-	wrmsr(0x20000018, msr);
+	wrmsr(MC_CF07_DATA, msr);
 
 	msr = rdmsr(0x20000019);
 	msr.hi = 0x18000108;
 	msr.lo = 0x696332a3;
-	wrmsr(0x20000019, msr);	
+	wrmsr(0x20000019, msr);		
+
 }
 
 #include "northbridge/amd/gx2/raminit.c"
@@ -100,6 +150,5 @@ static void main(unsigned long bist)
 
 	
 	/* Check all of memory */
-	ram_check(0x00000000, 640*1024);
-
+	//ram_check(0x00000000, 640*1024);
 }
diff --git a/src/northbridge/amd/gx2/northbridge.c b/src/northbridge/amd/gx2/northbridge.c
index 85961f48b7..fb3cb1c1e0 100644
--- a/src/northbridge/amd/gx2/northbridge.c
+++ b/src/northbridge/amd/gx2/northbridge.c
@@ -155,11 +155,16 @@ setup_gx2_cache(void)
 	wbinvd();
 	return sizembytes;
 }
+
+#define SMM_OFFSET 0x40400000
+#define SMM_SIZE   256
+
 /* we have to do this here. We have not found a nicer way to do it */
 void
 setup_gx2(void)
 {
 	int i;
+	unsigned long tmp, tmp2, tmp3;
 	msr_t msr;
 	unsigned long sizem, membytes;
 
@@ -169,10 +174,10 @@ setup_gx2(void)
 
 	/* we need to set 0x10000028 and 0x40000029 */
 	printk_debug("sizem 0x%x, membytes 0x%x\n", sizem, membytes);
-	msr.hi = 0x20000000 | membytes >>24;
+	msr.hi = 0x20000000 | membytes>>24;
 	msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
 	wrmsr(0x10000028, msr);
-	msr.hi = 0x20000000 | membytes >>24;
+	msr.hi = 0x20000000 | membytes>>24;
 	msr.lo = 0x100 | ( ((membytes >>12) & 0xfff) << 20);
 	wrmsr(0x40000029, msr);
 	msr = rdmsr(0x10000028);
@@ -181,6 +186,22 @@ setup_gx2(void)
 	printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x40000029, msr.hi,msr.lo);
 
 
+	/* fixme: SMM MSR 0x10000026 and 0x400000023 */
+	/* calculate the OFFSET field */
+	tmp = membytes - SMM_OFFSET;
+	tmp >>= 12;
+	tmp <<= 8;
+	tmp |= 0x20000000;
+	tmp |= (SMM_OFFSET >> 24);
+
+	/* calculate the PBASE and PMASK fields */
+	tmp2 = (SMM_OFFSET << 8) & 0xFFF00000; /* shift right 12 then left 20  == left 8 */
+	tmp2 |= (((~(SMM_SIZE * 1024) + 1) >> 12) & 0xfffff);
+	printk_debug("MSR 0x%x is now 0x%x:0x%x\n", 0x10000026, tmp, tmp2);
+	msr.hi = tmp;
+	msr.lo = tmp2;
+	wrmsr(0x10000026, msr);
+
 	/* now do the default MSR values */
 	for(i = 0; msr_defaults[i].msr_no; i++) {
 		msr_t msr;
@@ -383,11 +404,11 @@ static void enable_dev(struct device *dev)
 		cpubug();	
 		setup_gx2();
 		/* do this here for now -- this chip really breaks our device model */
+		setup_realmode_idt();
 		do_vsmbios();
 		dev->ops = &pci_domain_ops;
 		pci_set_method(dev);
-        }
-        else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
+        } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
 
 		printk_debug("DEVICE_PATH_APIC_CLUSTER\n");
                 dev->ops = &cpu_bus_ops;
diff --git a/src/northbridge/amd/gx2/pll_reset.c b/src/northbridge/amd/gx2/pll_reset.c
index e1696fd703..ea54c49277 100644
--- a/src/northbridge/amd/gx2/pll_reset.c
+++ b/src/northbridge/amd/gx2/pll_reset.c
@@ -86,17 +86,6 @@ static const unsigned char fbdiv2plldiv[] = {
 	49, 40, 19, 59, 32, 54, 35,  0, 41, 60, 55,  0, 61,  0,  0,  0
 };
 
-static const unsigned char pci33_sdr_crt [] = {
-	/* FbDIV, VDIV, MDIV		   CPU/GeodeLink */
-	      12,    2,    4,		// 200/100
-	      16,    2,    4,		// 266/133
-              18,    2,    5,		// 300/120
-              20,    2,    5,		// 333/133
-              22,    2,    6,		// 366/122
-              24,    2,    6,		// 400/133
-              26,    2,    6            // 433/144
-};
-
 static const unsigned char pci33_ddr_crt [] = {
 	/* FbDIV, VDIV, MDIV		   CPU/GeodeLink */
 	     12,    2,    3,		// 200/133
diff --git a/src/northbridge/amd/gx2/raminit.c b/src/northbridge/amd/gx2/raminit.c
index f0156c3183..636c60b9d2 100644
--- a/src/northbridge/amd/gx2/raminit.c
+++ b/src/northbridge/amd/gx2/raminit.c
@@ -4,19 +4,6 @@ static void sdram_set_registers(const struct mem_controller *ctrl)
 {
 }
 
-#if 0
-static void sdram_set_spd_registers(const struct mem_controller *ctrl) 
-{
-	msr_t mst;
-	unsigned char val;
-
-	/* get module banks per dimm, SPD byte 5 */
-	val = spd_read_byte(0xA0, 5);
-	if (val < 1 || val > 2)
-		print_err("Module banks per dimm");
-
-}
-#endif
 /* Section 6.1.3, LX processor databooks, BIOS Initialization Sequence
  * Section 4.1.4, GX/CS5535 GeodeROM Porting guide */
 static void sdram_enable(int controllers, const struct mem_controller *ctrl)
diff --git a/src/southbridge/amd/cs5535/cs5535_early_setup.c b/src/southbridge/amd/cs5535/cs5535_early_setup.c
index a1cab08c88..e6b36435b2 100644
--- a/src/southbridge/amd/cs5535/cs5535_early_setup.c
+++ b/src/southbridge/amd/cs5535/cs5535_early_setup.c
@@ -97,7 +97,7 @@ static int cs5535_early_setup(void)
 
 	cs5535_setup_extmsr();
 
-	msr = rdmsr(0x4c000014);
+	msr = rdmsr(GLCP_SYS_RSTPLL);
 	if (msr.lo & (0x3f << 26)) {
 		/* PLL is already set and we are reboot from PLL reset */
 		print_debug("reboot from BIOS reset\n\r");