[Skiboot] [PATCH v7 10/22] dump: Define fadump structure

[Vasant Hegde]

Naming convention: Linux refers MPIPL as firmware assisted dump (fadump).

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 | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/include/opal-api.h b/include/opal-api.h
index e461c9d27..e783540e1 100644
--- a/include/opal-api.h
+++ b/include/opal-api.h
@@ -1319,6 +1319,37 @@ 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 structure.
+ * And passes this to payload via device tree.
+ */
+struct fadump_section {
+	u8	source_type;	/* FADUMP_REGION_* */
+	u8	reserved[7];
+	__be64	source_addr;
+	__be64	source_size;
+	__be64	dest_addr;
+	__be64	dest_size;
+} __packed;
+
+struct fadump {
+	__be16  fadump_section_size;	/* sizeof(struct fadump_section) */
+	__be16	section_count;
+	__be32	crashing_cpu;
+	__be64	reserved;
+	struct	fadump_section section[];
+};
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __OPAL_API_H */
-- 
2.14.3