[Skiboot] [RFC PATCH 09/16] fadump: Define FADUMP structure

[Vasant Hegde]

This structure is shared between OPAL and payload. During fadump registration
payload will use this structure to pass kernel memory reservation details to
OPAL. OPAL will use this structure to fill MDST, MDDT table. After fadump,
OPAL uses MDRT table to fill this structure and passes this to payload via
device tree.

Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
---
 include/opal-api.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/include/opal-api.h b/include/opal-api.h
index df71cf2d7..4fb2db27d 100644
--- a/include/opal-api.h
+++ b/include/opal-api.h
@@ -1303,6 +1303,36 @@ enum {
 	OPAL_PCI_P2P_TARGET	= 1,
 };
 
+/*
+ * FADUMP memory region ID usable by kernel
+ * 0x80 - 0xff -> Payload
+ */
+#define FADUMP_REGION_HOST_START	0x80
+#define FADUMP_REGION_HOST_END		0xff
+
+/*
+ * fadump section details. This structure is shared between OPAL and payload.
+ * During fadump registration payload will use this structure to pass kernel
+ * memory reservation details to OPAL. OPAL will use this structure to fill
+ * MDST, MDDT table. After fadump, OPAL uses MDRT table to fill this strcture.
+ * And passes this to payload via device tree.
+ */
+struct fadump_section {
+	u8	source_type;	/* DUMP_REGION_* */
+	u8	reserved[7];
+	u64	source_addr;
+	u64	source_size;
+	u64	dest_addr;
+	u64	dest_size;
+} __packed;
+
+struct fadump {
+	u16	fadump_section_size;	/* sizeof(struct fadump_section) */
+	u16	section_count;
+	u32	reserved;
+	struct	fadump_section section[];
+};
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __OPAL_API_H */
-- 
2.14.3