[Skiboot] [RFC PATCH 08/16] hdata: Adjust various structure offset after relocation

[Vasant Hegde]

ntuple addresses are relative to payload base. Update various addresses
after relocation so that hostboot can access new address to capture dump.

Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
---
 hdata/spira.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/hdata/spira.c b/hdata/spira.c
index 3bce046b3..48b6ef813 100644
--- a/hdata/spira.c
+++ b/hdata/spira.c
@@ -25,6 +25,7 @@
 #include <opal-dump.h>
 #include <fsp-attn.h>
 #include <fsp-leds.h>
+#include <skiboot.h>
 
 #include "hdata.h"
 #include "hostservices.h"
@@ -1695,12 +1696,36 @@ static void fixup_spira(void)
 	spira.ntuples.node_stb_data = spiras->ntuples.node_stb_data;
 }
 
+/*
+ * All the data structure addresses are relative to payload base. Hence adjust
+ * structures that are needed to capture OPAL dump during memory preserving IPL.
+ */
+static void update_spirah_addr(void)
+{
+#if !defined(TEST)
+	/* NACA starts at 0x4000 (see asm/head.S) */
+	uint64_t *spirah_offset = (uint64_t *)((u64)SKIBOOT_BASE + 0x4000);
+	/* Legacy SPIRA */
+	uint64_t *spira_offset = (uint64_t *)((u64)SKIBOOT_BASE + 0x4000 + 0x30);
+
+	if (proc_gen < proc_gen_p9)
+		return;
+
+	*spirah_offset = SPIRAH_OFF;
+	*spira_offset = SPIRA_OFF;
+	spirah.ntuples.hs_data_area.addr = CPU_TO_BE64(SPIRA_HEAP_BASE - SKIBOOT_BASE);
+	spirah.ntuples.mdump_res.addr = CPU_TO_BE64(MDRT_TABLE_BASE - SKIBOOT_BASE);
+#endif
+}
+
 int parse_hdat(bool is_opal)
 {
 	cpu_type = PVR_TYPE(mfspr(SPR_PVR));
 
 	prlog(PR_DEBUG, "Parsing HDAT...\n");
 
+	update_spirah_addr();
+
 	fixup_spira();
 
 	/*
-- 
2.14.3