arch/x86/smbios: Add type 7

The SMBIOS spec requires type 7 to be present.

Add the type 7 fields and enums for SMBIOS 3.1+ and fill it with the
"Deterministic Cache Parameters" as available on Intel and AMD.

As CPUID only provides partial information on caches, some fields are set to
unknown.
The following fields are supported:
* Cache Level
* Cache Size
* Cache Type
* Cache Ways of Associativity

Tested on Intel Sandy Bridge (Lenovo T520).
All 4 caches are displayed in dmidecode and show the correct information.

Change-Id: I80ed25b8f2c7b425136b2f0c755324a8f5d1636d
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32131
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/src/include/smbios.h b/src/include/smbios.h
index af83bfe304..08e6b61ef7 100644
--- a/src/include/smbios.h
+++ b/src/include/smbios.h
@@ -393,6 +393,93 @@ struct smbios_type4 {
 	u8 eos[2];
 } __packed;
 
+/* defines for supported_sram_type/current_sram_type */
+
+#define SMBIOS_CACHE_SRAM_TYPE_OTHER			(1 << 0)
+#define SMBIOS_CACHE_SRAM_TYPE_UNKNOWN			(1 << 1)
+#define SMBIOS_CACHE_SRAM_TYPE_NON_BURST		(1 << 2)
+#define SMBIOS_CACHE_SRAM_TYPE_BURST			(1 << 3)
+#define SMBIOS_CACHE_SRAM_TYPE_PIPELINE_BURST		(1 << 4)
+#define SMBIOS_CACHE_SRAM_TYPE_SYNCHRONOUS		(1 << 5)
+#define SMBIOS_CACHE_SRAM_TYPE_ASYNCHRONOUS		(1 << 6)
+
+/* enum for error_correction_type */
+
+enum smbios_cache_error_corr {
+	SMBIOS_CACHE_ERROR_CORRECTION_OTHER = 1,
+	SMBIOS_CACHE_ERROR_CORRECTION_UNKNOWN,
+	SMBIOS_CACHE_ERROR_CORRECTION_NONE,
+	SMBIOS_CACHE_ERROR_CORRECTION_PARITY,
+	SMBIOS_CACHE_ERROR_CORRECTION_SINGLE_BIT,
+	SMBIOS_CACHE_ERROR_CORRECTION_MULTI_BIT,
+};
+
+/* enum for system_cache_type */
+
+enum smbios_cache_type {
+	SMBIOS_CACHE_TYPE_OTHER = 1,
+	SMBIOS_CACHE_TYPE_UNKNOWN,
+	SMBIOS_CACHE_TYPE_INSTRUCTION,
+	SMBIOS_CACHE_TYPE_DATA,
+	SMBIOS_CACHE_TYPE_UNIFIED,
+};
+
+/* enum for associativity */
+
+enum smbios_cache_associativity {
+	SMBIOS_CACHE_ASSOCIATIVITY_OTHER = 1,
+	SMBIOS_CACHE_ASSOCIATIVITY_UNKNOWN,
+	SMBIOS_CACHE_ASSOCIATIVITY_DIRECT,
+	SMBIOS_CACHE_ASSOCIATIVITY_2WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_4WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_FULL,
+	SMBIOS_CACHE_ASSOCIATIVITY_8WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_16WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_12WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_24WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_32WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_48WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_64WAY,
+	SMBIOS_CACHE_ASSOCIATIVITY_20WAY,
+};
+
+/* defines for cache_configuration */
+
+#define SMBIOS_CACHE_CONF_LEVEL(x) ((((x) - 1) & 0x7) << 0)
+#define SMBIOS_CACHE_CONF_LOCATION(x) (((x) & 0x3) << 5)
+#define SMBIOS_CACHE_CONF_ENABLED(x) (((x) & 0x1) << 7)
+#define SMBIOS_CACHE_CONF_OPERATION_MODE(x) (((x) & 0x3) << 8)
+
+/* defines for max_cache_size and installed_size */
+
+#define SMBIOS_CACHE_SIZE_UNIT_1KB		(0 << 15)
+#define SMBIOS_CACHE_SIZE_UNIT_64KB		(1 << 15)
+#define SMBIOS_CACHE_SIZE_MASK			0x7fff
+#define SMBIOS_CACHE_SIZE_OVERFLOW		0xffff
+
+#define SMBIOS_CACHE_SIZE2_UNIT_1KB		(0 << 31)
+#define SMBIOS_CACHE_SIZE2_UNIT_64KB		(1UL << 31)
+#define SMBIOS_CACHE_SIZE2_MASK			0x7fffffff
+
+struct smbios_type7 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 socket_designation;
+	u16 cache_configuration;
+	u16 max_cache_size;
+	u16 installed_size;
+	u16 supported_sram_type;
+	u16 current_sram_type;
+	u8 cache_speed;
+	u8 error_correction_type;
+	u8 system_cache_type;
+	u8 associativity;
+	u32 max_cache_size2;
+	u32 installed_size2;
+	u8 eos[2];
+} __packed;
+
 struct smbios_type11 {
 	u8 type;
 	u8 length;