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-rw-r--r--arch/powerpc/kernel/prom.c42
1 files changed, 40 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 8b6f7a99cce..eb23ac92abb 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -559,6 +559,35 @@ void __init early_init_dt_setup_initrd_arch(unsigned long start,
}
#endif
+static void __init early_reserve_mem_dt(void)
+{
+ unsigned long i, len, dt_root;
+ const __be32 *prop;
+
+ dt_root = of_get_flat_dt_root();
+
+ prop = of_get_flat_dt_prop(dt_root, "reserved-ranges", &len);
+
+ if (!prop)
+ return;
+
+ DBG("Found new-style reserved-ranges\n");
+
+ /* Each reserved range is an (address,size) pair, 2 cells each,
+ * totalling 4 cells per range. */
+ for (i = 0; i < len / (sizeof(*prop) * 4); i++) {
+ u64 base, size;
+
+ base = of_read_number(prop + (i * 4) + 0, 2);
+ size = of_read_number(prop + (i * 4) + 2, 2);
+
+ if (size) {
+ DBG("reserving: %llx -> %llx\n", base, size);
+ memblock_reserve(base, size);
+ }
+ }
+}
+
static void __init early_reserve_mem(void)
{
u64 base, size;
@@ -574,12 +603,16 @@ static void __init early_reserve_mem(void)
self_size = initial_boot_params->totalsize;
memblock_reserve(self_base, self_size);
+ /* Look for the new "reserved-regions" property in the DT */
+ early_reserve_mem_dt();
+
#ifdef CONFIG_BLK_DEV_INITRD
- /* then reserve the initrd, if any */
- if (initrd_start && (initrd_end > initrd_start))
+ /* Then reserve the initrd, if any */
+ if (initrd_start && (initrd_end > initrd_start)) {
memblock_reserve(_ALIGN_DOWN(__pa(initrd_start), PAGE_SIZE),
_ALIGN_UP(initrd_end, PAGE_SIZE) -
_ALIGN_DOWN(initrd_start, PAGE_SIZE));
+ }
#endif /* CONFIG_BLK_DEV_INITRD */
#ifdef CONFIG_PPC32
@@ -591,6 +624,8 @@ static void __init early_reserve_mem(void)
u32 base_32, size_32;
u32 *reserve_map_32 = (u32 *)reserve_map;
+ DBG("Found old 32-bit reserve map\n");
+
while (1) {
base_32 = *(reserve_map_32++);
size_32 = *(reserve_map_32++);
@@ -605,6 +640,9 @@ static void __init early_reserve_mem(void)
return;
}
#endif
+ DBG("Processing reserve map\n");
+
+ /* Handle the reserve map in the fdt blob if it exists */
while (1) {
base = *(reserve_map++);
size = *(reserve_map++);