[src/trunk]: src/sys/arch/evbarm/fdt Deal with reserved memory ranges that st...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/41197564d3f5
branches:  trunk
changeset: 364076:41197564d3f5
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu Aug 23 22:34:03 2018 +0000

description:
Deal with reserved memory ranges that start before mem start

diffstat:

 sys/arch/evbarm/fdt/fdt_machdep.c |  14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diffs (51 lines):

diff -r a8643763c173 -r 41197564d3f5 sys/arch/evbarm/fdt/fdt_machdep.c
--- a/sys/arch/evbarm/fdt/fdt_machdep.c Thu Aug 23 21:01:43 2018 +0000
+++ b/sys/arch/evbarm/fdt/fdt_machdep.c Thu Aug 23 22:34:03 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fdt_machdep.c,v 1.32 2018/08/05 14:02:36 skrll Exp $ */
+/* $NetBSD: fdt_machdep.c,v 1.33 2018/08/23 22:34:03 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015-2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fdt_machdep.c,v 1.32 2018/08/05 14:02:36 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fdt_machdep.c,v 1.33 2018/08/23 22:34:03 jmcneill Exp $");
 
 #include "opt_machdep.h"
 #include "opt_bootconfig.h"
@@ -213,7 +213,7 @@
  * Exclude memory ranges from memory config from the device tree
  */
 static void
-fdt_add_reserved_memory(uint64_t max_addr)
+fdt_add_reserved_memory(uint64_t min_addr, uint64_t max_addr)
 {
        uint64_t addr, size;
        int index, error;
@@ -224,8 +224,14 @@
                    &addr, &size);
                if (error != 0 || size == 0)
                        continue;
+               if (addr + size <= min_addr)
+                       continue;
                if (addr >= max_addr)
                        continue;
+               if (addr < min_addr) {
+                       size -= (min_addr - addr);
+                       addr = min_addr;
+               }
                if (addr + size > max_addr)
                        size = max_addr - addr;
                fdt_add_reserved_memory_range(addr, size);
@@ -263,7 +269,7 @@
                VPRINTF("MEM: add %" PRIx64 "-%" PRIx64 "\n", addr, addr + size);
        }
 
-       fdt_add_reserved_memory(mem_end);
+       fdt_add_reserved_memory(mem_start, mem_end);
 
        const uint64_t initrd_size = initrd_end - initrd_start;
        if (initrd_size > 0)