src/acpi: Add macro for FADT Minor Version and use it

Change-Id: I6a0e9b33c6a1045a3a4a6717487525b82d41e558
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62036
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lance Zhao

src/acpi/acpi.c

@@ -1944,11 +1944,16 @@ __weak int acpi_get_gpe(int gpe)
 	return -1; /* implemented by SOC */
 }
 
+u8 get_acpi_fadt_minor_version(void)
+{
+	return ACPI_FADT_MINOR_VERSION_0;
+}
+
 int get_acpi_table_revision(enum acpi_tables table)
 {
 	switch (table) {
 	case FADT:
-		return ACPI_FADT_REV_ACPI_6_0;
+		return ACPI_FADT_REV_ACPI_6;
 	case MADT: /* ACPI 3.0: 2, ACPI 4.0/5.0: 3, ACPI 6.2b/6.3: 5 */
 		return 3;
 	case MCFG:

src/include/acpi/acpi.h

@@ -747,7 +747,7 @@ typedef struct acpi_fadt {
 	acpi_addr_t reset_reg;
 	u8 reset_value;
 	u16 ARM_boot_arch;	/* Revision 6 only, Revision 5: Must be zero */
-	u8 FADT_MinorVersion;	/* Revision 6 only, Revision 5: Must be zero */
+	u8 FADT_MinorVersion;	/* Must be zero if ACPI Revision <= 5.0 */
 	u32 x_firmware_ctl_l;
 	u32 x_firmware_ctl_h;
 	u32 x_dsdt_l;
@@ -768,12 +768,21 @@ typedef struct acpi_fadt {
 } __packed acpi_fadt_t;
 
 /* FADT TABLE Revision values */
-#define ACPI_FADT_REV_ACPI_1_0		1
+#define ACPI_FADT_REV_ACPI_1	1
-#define ACPI_FADT_REV_ACPI_2_0		3
+#define ACPI_FADT_REV_ACPI_2	3
-#define ACPI_FADT_REV_ACPI_3_0		4
+#define ACPI_FADT_REV_ACPI_3	4
-#define ACPI_FADT_REV_ACPI_4_0		4
+#define ACPI_FADT_REV_ACPI_4	4
-#define ACPI_FADT_REV_ACPI_5_0		5
+#define ACPI_FADT_REV_ACPI_5	5
-#define ACPI_FADT_REV_ACPI_6_0		6
+#define ACPI_FADT_REV_ACPI_6	6
+
+/* FADT Minor Version value:
+ *  Bits 0-3: minor version
+ *  Bits 4-7: Errata
+ *   value of 1 means this is compatible with Errata A,
+ *   value of 2 would be compatible with Errata B, and so on
+ * Version 6.3 Errata A would be: (1 << 4) | 3
+ */
+#define ACPI_FADT_MINOR_VERSION_0	0 /* coreboot currently use this version */
 
 /* Flags for p_lvl2_lat and p_lvl3_lat */
 #define ACPI_FADT_C2_NOT_SUPPORTED	101
@@ -1434,6 +1443,7 @@ static inline uintptr_t acpi_align_current(uintptr_t current)
  * be made into a weak function if there is ever a need to override the
  * coreboot default ACPI spec version supported. */
 int get_acpi_table_revision(enum acpi_tables table);
+u8 get_acpi_fadt_minor_version(void);
 
 #endif  // !defined(__ASSEMBLER__) && !defined(__ACPI__)
 

src/soc/amd/picasso/acpi.c

@@ -106,7 +106,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 	fadt->flags |= cfg->fadt_flags; /* additional board-specific flags */
 
 	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
-	fadt->FADT_MinorVersion = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_firmware_ctl_l = 0;	/* set to 0 if firmware_ctrl is used */
 	fadt->x_firmware_ctl_h = 0;

src/soc/amd/stoneyridge/acpi.c

@@ -98,7 +98,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_REMOTE_POWER_ON;
 
 	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
-	fadt->FADT_MinorVersion = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_firmware_ctl_l = 0;	/* set to 0 if firmware_ctrl is used */
 	fadt->x_firmware_ctl_h = 0;

src/southbridge/amd/agesa/hudson/fadt.c

@@ -63,7 +63,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_REMOTE_POWER_ON;
 
 	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
-	fadt->FADT_MinorVersion = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_pm1a_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
 	fadt->x_pm1a_evt_blk.bit_width = 32;

src/southbridge/amd/cimx/sb800/fadt.c

@@ -87,7 +87,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_REMOTE_POWER_ON;
 
 	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
-	fadt->FADT_MinorVersion = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_pm1a_evt_blk.space_id = ACPI_ADDRESS_SPACE_IO;
 	fadt->x_pm1a_evt_blk.bit_width = 32;

src/southbridge/amd/pi/hudson/fadt.c

@@ -63,7 +63,7 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
 				ACPI_FADT_REMOTE_POWER_ON;
 
 	fadt->ARM_boot_arch = 0;	/* MUST be 0 ACPI 3.0 */
-	fadt->FADT_MinorVersion = 0;	/* MUST be 0 ACPI 3.0 */
+	fadt->FADT_MinorVersion = get_acpi_fadt_minor_version();
 
 	fadt->x_firmware_ctl_l = 0;	/* set to 0 if firmware_ctrl is used */
 	fadt->x_firmware_ctl_h = 0;