+#ifdef CONFIG_PHYP_DUMP
+/**
+ * phyp_dump_calculate_reserve_size() - reserve variable boot area 5% or arg
+ *
+ * Function to find the largest size we need to reserve
+ * during early boot process.
+ *
+ * It either looks for boot param and returns that OR
+ * returns larger of 256 or 5% rounded down to multiples of 256MB.
+ *
+ */
+static inline unsigned long phyp_dump_calculate_reserve_size(void)
+{
+ unsigned long tmp;
+
+ if (phyp_dump_info->reserve_bootvar)
+ return phyp_dump_info->reserve_bootvar;
+
+ /* divide by 20 to get 5% of value */
+ tmp = lmb_end_of_DRAM();
+ do_div(tmp, 20);
+
+ /* round it down in multiples of 256 */
+ tmp = tmp & ~0x0FFFFFFFUL;
+
+ return (tmp > PHYP_DUMP_RMR_END ? tmp : PHYP_DUMP_RMR_END);
+}
+
+/**
+ * phyp_dump_reserve_mem() - reserve all not-yet-dumped mmemory
+ *
+ * This routine may reserve memory regions in the kernel only
+ * if the system is supported and a dump was taken in last
+ * boot instance or if the hardware is supported and the
+ * scratch area needs to be setup. In other instances it returns
+ * without reserving anything. The memory in case of dump being
+ * active is freed when the dump is collected (by userland tools).
+ */
+static void __init phyp_dump_reserve_mem(void)
+{
+ unsigned long base, size;
+ unsigned long variable_reserve_size;
+
+ if (!phyp_dump_info->phyp_dump_configured) {
+ printk(KERN_ERR "Phyp-dump not supported on this hardware\n");
+ return;
+ }
+
+ if (!phyp_dump_info->phyp_dump_at_boot) {
+ printk(KERN_INFO "Phyp-dump disabled at boot time\n");
+ return;
+ }
+
+ variable_reserve_size = phyp_dump_calculate_reserve_size();
+
+ if (phyp_dump_info->phyp_dump_is_active) {
+ /* Reserve *everything* above RMR.Area freed by userland tools*/
+ base = variable_reserve_size;
+ size = lmb_end_of_DRAM() - base;
+
+ /* XXX crashed_ram_end is wrong, since it may be beyond
+ * the memory_limit, it will need to be adjusted. */
+ lmb_reserve(base, size);
+
+ phyp_dump_info->init_reserve_start = base;
+ phyp_dump_info->init_reserve_size = size;
+ } else {
+ size = phyp_dump_info->cpu_state_size +
+ phyp_dump_info->hpte_region_size +
+ variable_reserve_size;
+ base = lmb_end_of_DRAM() - size;
+ lmb_reserve(base, size);
+ phyp_dump_info->init_reserve_start = base;
+ phyp_dump_info->init_reserve_size = size;
+ }
+}
+#else
+static inline void __init phyp_dump_reserve_mem(void) {}
+#endif /* CONFIG_PHYP_DUMP && CONFIG_PPC_RTAS */
+
+