[Skiboot] [PATCH v4 08/18] hdata: Adjust various structure offset after relocation

[Vasant Hegde]

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

Note that we update relocated SPIRAH. So if we crash before sending
relocated skiboot base to SBE, hostboot can still collect early
crash using original skiboot base.

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 c761b45b1..9d968fbcb 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"
@@ -1707,6 +1708,28 @@ 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));
@@ -1715,6 +1738,8 @@ int parse_hdat(bool is_opal)
 
 	fixup_spira();
 
+	update_spirah_addr();
+
 	/*
 	 * Basic DT root stuff
 	 */
-- 
2.14.3