From ed522fedd4944ad56dd38ceac0d926c1c92b970f Mon Sep 17 00:00:00 2001
From: br <br@FreeBSD.org>
Date: Wed, 17 Dec 2014 09:34:54 +0000
Subject: [PATCH] Use memory regions information provided in FDT.

Reviewed by:	brooks
Sponsored by:	DARPA, AFRL
---
 sys/mips/beri/beri_machdep.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/sys/mips/beri/beri_machdep.c b/sys/mips/beri/beri_machdep.c
index deda11968f72..714ee3d583e4 100644
--- a/sys/mips/beri/beri_machdep.c
+++ b/sys/mips/beri/beri_machdep.c
@@ -88,6 +88,11 @@ static void
 mips_init(void)
 {
 	int i;
+#ifdef FDT
+	struct mem_region mr[FDT_MEM_REGIONS];
+	int mr_cnt, val;
+	int j;
+#endif
 
 	for (i = 0; i < 10; i++) {
 		phys_avail[i] = 0;
@@ -102,6 +107,29 @@ mips_init(void)
 
 	physmem = realmem;
 
+#ifdef FDT
+	if (fdt_get_mem_regions(mr, &mr_cnt, &val) == 0) {
+
+		physmem = btoc(val);
+
+		KASSERT((phys_avail[0] >= mr[0].mr_start) && \
+			(phys_avail[0] < (mr[0].mr_start + mr[0].mr_size)),
+			("First region is not within FDT memory range"));
+
+		/* Limit size of the first region */
+		phys_avail[1] = MIN(mr[0].mr_size, ctob(realmem));
+		dump_avail[1] = phys_avail[1];
+
+		/* Add the rest of regions */
+		for (i = 1, j = 2; i < mr_cnt; i++, j+=2) {
+			phys_avail[j] = mr[i].mr_start;
+			phys_avail[j+1] = mr[i].mr_size;
+			dump_avail[j] = phys_avail[j];
+			dump_avail[j+1] = phys_avail[j+1];
+		}
+	}
+#endif
+
 	init_param1();
 	init_param2(physmem);
 	mips_cpu_init();