+
+ opt = strstr(RELOC(prom_cmd_line), RELOC("mem="));
+ if (opt) {
+ opt += 4;
+ RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt);
+#ifdef CONFIG_PPC64
+ /* Align to 16 MB == size of ppc64 large page */
+ RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000);
+#endif
+ }
+
+#ifdef CONFIG_KEXEC
+ /*
+ * crashkernel=size@addr specifies the location to reserve for
+ * crash kernel.
+ */
+ opt = strstr(RELOC(prom_cmd_line), RELOC("crashkernel="));
+ if (opt) {
+ opt += 12;
+ RELOC(prom_crashk_size) =
+ prom_memparse(opt, (const char **)&opt);
+
+ if (ALIGN(RELOC(prom_crashk_size), 0x1000000) !=
+ RELOC(prom_crashk_size)) {
+ prom_printf("Warning: crashkernel size is not "
+ "aligned to 16MB\n");
+ }
+
+ /*
+ * At present, the crash kernel always run at 32MB.
+ * Just ignore whatever user passed.
+ */
+ RELOC(prom_crashk_base) = 0x2000000;
+ if (*opt == '@') {
+ prom_printf("Warning: PPC64 kdump kernel always runs "
+ "at 32 MB\n");
+ }
+ }
+#endif