SMM: Fix state save map for sandybridge and TSEG

There are enough differences that it is worth defining the
proper map for the sandybridge/ivybridge CPUs.  The state
save map was not being addressed properly for TSEG and
needs to use the right offset instead of pointing in ASEG.

To do this properly add a required southbridge export to
return the TSEG base and use that where appropriate.

Change-Id: Idad153ed6c07d2633cb3d53eddd433a3df490834
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/1309
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/include/cpu/x86/smm.h

@@ -201,6 +201,96 @@ typedef struct {
 } __attribute__((packed)) em64t_smm_state_save_area_t;
 
 
+/* Intel Revision 30101 SMM State-Save Area
+ * Used in SandyBridge/IvyBridge architecture
+ * starts @ 0x7d00
+ */
+typedef struct {
+	u8	reserved0[208];
+
+	u32	gdtr_upper_base;
+	u32	ldtr_upper_base;
+	u32	idtr_upper_base;
+
+	u32	io_cf8;
+
+	u64	io_rdi;
+	u64	io_rip;
+	u64	io_rcx;
+	u64	io_rsi;
+
+	u8	reserved1[52];
+	u32	shutdown_auto_restart;
+	u8	reserved2[8];
+	u32	cr4;
+
+	u8	reserved3[72];
+
+	u32	gdtr_base;
+	u8	reserved4[4];
+	u32	idtr_base;
+	u8	reserved5[4];
+	u32	ldtr_base;
+
+	u8	reserved6[68];
+	u32	cs_base;
+	u8	reserved7[4];
+	u32	iedbase;
+
+	u8	reserved8[8];
+
+	u32	smbase;
+	u32	smm_revision;
+
+	u16	io_restart;
+	u16	autohalt_restart;
+
+	u8	reserved9[24];
+
+	u64	r15;
+	u64	r14;
+	u64	r13;
+	u64	r12;
+	u64	r11;
+	u64	r10;
+	u64	r9;
+	u64	r8;
+
+	u64	rax;
+	u64	rcx;
+	u64	rdx;
+	u64	rbx;
+
+	u64	rsp;
+	u64	rbp;
+	u64	rsi;
+	u64	rdi;
+
+
+	u64	io_mem_addr;
+	u32	io_misc_info;
+
+	u32	es_sel;
+	u32	cs_sel;
+	u32	ss_sel;
+	u32	ds_sel;
+	u32	fs_sel;
+	u32	gs_sel;
+
+	u32	ldtr_sel;
+	u32	tr_sel;
+
+	u64	dr7;
+	u64	dr6;
+	u64	rip;
+	u64	efer;
+	u64	rflags;
+
+	u64	cr3;
+	u64	cr0;
+} __attribute__((packed)) em64t101_smm_state_save_area_t;
+
+
 /* Legacy x86 SMM State-Save Area
  * starts @ 0x7e00
  */
@@ -243,6 +333,7 @@ typedef struct {
 typedef enum {
 	AMD64,
 	EM64T,
+	EM64T101,
 	LEGACY
 } save_state_type_t;
 
@@ -252,6 +343,7 @@ typedef struct {
 	union {
 	amd64_smm_state_save_area_t *amd64_state_save;
 	em64t_smm_state_save_area_t *em64t_state_save;
+	em64t101_smm_state_save_area_t *em64t101_state_save;
 	legacy_smm_state_save_area_t *legacy_state_save;
 	};
 } smm_state_save_area_t;
@@ -284,6 +376,9 @@ void __attribute__((weak)) mainboard_smi_sleep(u8 slp_typ);
 
 #if !CONFIG_SMM_TSEG
 void smi_release_lock(void);
+#else
+/* Return address of TSEG base */
+u32 smi_get_tseg_base(void);
 #endif
 
 #endif