sb/intel/i82801gx: Add the option to lock the platform

This allows to lock down spi among other things
Mostly copied from bd82x6x.

Tested on Intel DG41WV with the MRC_CACHE driver write protecting the
mrc_cache region.

Change-Id: If9c3a6118f4586d51c093edec896c347ba904b8f
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/23358
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/src/southbridge/intel/i82801gx/i82801gx.h b/src/southbridge/intel/i82801gx/i82801gx.h
index 1038bafdab..36c79eb5d1 100644
--- a/src/southbridge/intel/i82801gx/i82801gx.h
+++ b/src/southbridge/intel/i82801gx/i82801gx.h
@@ -368,6 +368,53 @@ int southbridge_detect_s3_resume(void);
 #define DEVACT_STS	0x44
 #define SS_CNT		0x50
 #define C3_RES		0x54
+#define TCO1_CNT	0x68
+
+/* SPIBAR
+ *
+ * SPI Opcode Menu setup for SPIBAR lockdown
+ * should support most common flash chips.
+ */
+
+#define PREOP		0x54
+#define OPTYPE		0x56
+#define OPMENU		0x58
+
+#define SPI_OPMENU_0 0x01 /* WRSR: Write Status Register */
+#define SPI_OPTYPE_0 0x01 /* Write, no address */
+
+#define SPI_OPMENU_1 0x02 /* BYPR: Byte Program */
+#define SPI_OPTYPE_1 0x03 /* Write, address required */
+
+#define SPI_OPMENU_2 0x03 /* READ: Read Data */
+#define SPI_OPTYPE_2 0x02 /* Read, address required */
+
+#define SPI_OPMENU_3 0x05 /* RDSR: Read Status Register */
+#define SPI_OPTYPE_3 0x00 /* Read, no address */
+
+#define SPI_OPMENU_4 0x20 /* SE20: Sector Erase 0x20 */
+#define SPI_OPTYPE_4 0x03 /* Write, address required */
+
+#define SPI_OPMENU_5 0x9f /* RDID: Read ID */
+#define SPI_OPTYPE_5 0x00 /* Read, no address */
+
+#define SPI_OPMENU_6 0xd8 /* BED8: Block Erase 0xd8 */
+#define SPI_OPTYPE_6 0x03 /* Write, address required */
+
+#define SPI_OPMENU_7 0x0b /* FAST: Fast Read */
+#define SPI_OPTYPE_7 0x02 /* Read, address required */
+
+#define SPI_OPMENU_UPPER ((SPI_OPMENU_7 << 24) | (SPI_OPMENU_6 << 16) | \
+			  (SPI_OPMENU_5 << 8) | SPI_OPMENU_4)
+#define SPI_OPMENU_LOWER ((SPI_OPMENU_3 << 24) | (SPI_OPMENU_2 << 16) | \
+			  (SPI_OPMENU_1 << 8) | SPI_OPMENU_0)
+
+#define SPI_OPTYPE ((SPI_OPTYPE_7 << 14) | (SPI_OPTYPE_6 << 12) | \
+		    (SPI_OPTYPE_5 << 10) | (SPI_OPTYPE_4 << 8) |  \
+		    (SPI_OPTYPE_3 << 6) | (SPI_OPTYPE_2 << 4) |	  \
+		    (SPI_OPTYPE_1 << 2) | (SPI_OPTYPE_0))
+
+#define SPI_OPPREFIX ((0x50 << 8) | 0x06) /* EWSR and WREN */
 
 #endif /* __ACPI__ */
 #endif				/* SOUTHBRIDGE_INTEL_I82801GX_I82801GX_H */