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-rw-r--r--arch/powerpc/cpu/mpc85xx/fdt.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/fdt.c b/arch/powerpc/cpu/mpc85xx/fdt.c
index ab09330..16d7f6a 100644
--- a/arch/powerpc/cpu/mpc85xx/fdt.c
+++ b/arch/powerpc/cpu/mpc85xx/fdt.c
@@ -100,6 +100,22 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
printf("Failed to reserve memory for bootpg: %s\n",
fdt_strerror(off));
}
+
+#ifndef CONFIG_MPC8xxx_DISABLE_BPTR
+ /*
+ * Reserve the default boot page so OSes dont use it.
+ * The default boot page is always mapped to bootpg above using
+ * boot page translation.
+ */
+ if (0xfffff000ull < memory_limit) {
+ off = fdt_add_mem_rsv(blob, 0xfffff000ull, (u64)4096);
+ if (off < 0) {
+ printf("Failed to reserve memory for 0xfffff000: %s\n",
+ fdt_strerror(off));
+ }
+ }
+#endif
+
/* Reserve spin table page */
if (spin_tbl_addr < memory_limit) {
off = fdt_add_mem_rsv(blob,