[Skiboot] [PATCH 09/11] hdat: Parse hostboot memory reservations from HDAT

[Vasant Hegde]

Hostboot reserves some memory and passes via HDAT. This patch
adds code to parse node reservation details and marks it as
REGION_HW_RESERVED. Later mem_region_add_dt_reserved() populates
DT entry.

Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
---
 hdata/memory.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/hdata/memory.c b/hdata/memory.c
index a8b9955..bb776fd 100644
--- a/hdata/memory.c
+++ b/hdata/memory.c
@@ -19,6 +19,7 @@
 #include <vpd.h>
 #include <ccan/str/str.h>
 #include <libfdt/libfdt.h>
+#include <mem_region.h>
 #include <types.h>
 
 #include "spira.h"
@@ -383,6 +384,34 @@ static void get_msareas(struct dt_node *root,
 	}
 }
 
+static void get_hb_reserved_mem(struct HDIF_common_hdr *ms_vpd)
+{
+	int count, i;
+	const struct msvpd_hb_reserved_mem *hb_resv_mem;
+
+	if (proc_gen < proc_gen_p9)
+		return;
+
+	count = HDIF_get_iarray_size(ms_vpd, MSVPD_IDATA_HB_RESERVED_MEM);
+	if (count <= 0) {
+		prerror("MS VPD: No hostboot reserved memory found\n");
+		return;
+	}
+
+	for (i = 0; i < count; i++) {
+		hb_resv_mem = HDIF_get_iarray_item(ms_vpd,
+						   MSVPD_IDATA_HB_RESERVED_MEM,
+						   i, NULL);
+		if (!CHECK_SPPTR(hb_resv_mem))
+			continue;
+
+#if !defined(TEST)
+		mem_reserve_hw(hb_resv_mem->label, hb_resv_mem->start_addr,
+			       (hb_resv_mem->end_addr - hb_resv_mem->start_addr));
+#endif
+	}
+}
+
 static bool __memory_parse(struct dt_node *root)
 {
 	struct HDIF_common_hdr *ms_vpd;
@@ -431,6 +460,8 @@ static bool __memory_parse(struct dt_node *root)
 
 	get_msareas(root, ms_vpd);
 
+	get_hb_reserved_mem(ms_vpd);
+
 	prlog(PR_INFO, "MS VPD: Total MB of RAM: 0x%llx\n",
 	       (long long)be64_to_cpu(tcms->total_in_mb));
 
-- 
2.5.5