1 files changed, 71 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h
new file mode 100644
index 000000000000..7be25d30d985
--- /dev/null
+++ b/arch/powerpc/include/asm/fadump.h
@@ -0,0 +1,71 @@
+/*
+ * Firmware Assisted dump header file.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright 2011 IBM Corporation
+ * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
+ */
+
+#ifndef __PPC64_FA_DUMP_H__
+#define __PPC64_FA_DUMP_H__
+
+#ifdef CONFIG_FA_DUMP
+
+/*
+ * The RMA region will be saved for later dumping when kernel crashes.
+ * RMA is Real Mode Area, the first block of logical memory address owned
+ * by logical partition, containing the storage that may be accessed with
+ * translate off.
+ */
+#define RMA_START       0x0
+#define RMA_END         (ppc64_rma_size)
+
+/*
+ * On some Power systems where RMO is 128MB, it still requires minimum of
+ * 256MB for kernel to boot successfully. When kdump infrastructure is
+ * configured to save vmcore over network, we run into OOM issue while
+ * loading modules related to network setup. Hence we need aditional 64M
+ * of memory to avoid OOM issue.
+ */
+#define MIN_BOOT_MEM    (((RMA_END < (0x1UL << 28)) ? (0x1UL << 28) : RMA_END) \
+                        + (0x1UL << 26))
+
+/* Firmware provided dump sections */
+#define FADUMP_CPU_STATE_DATA   0x0001
+#define FADUMP_HPTE_REGION      0x0002
+#define FADUMP_REAL_MODE_REGION 0x0011
+
+struct fw_dump {
+        unsigned long   cpu_state_data_size;
+        unsigned long   hpte_region_size;
+        unsigned long   boot_memory_size;
+        unsigned long   reserve_dump_area_start;
+        unsigned long   reserve_dump_area_size;
+        /* cmd line option during boot */
+        unsigned long   reserve_bootvar;
+
+        int             ibm_configure_kernel_dump;
+
+        unsigned long   fadump_enabled:1;
+        unsigned long   fadump_supported:1;
+        unsigned long   dump_active:1;
+};
+
+extern int early_init_dt_scan_fw_dump(unsigned long node,
+                const char *uname, int depth, void *data);
+extern int fadump_reserve_mem(void);
+#endif
+#endif