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Diffstat (limited to 'arch/powerpc/platforms/pseries/firmware.c')
-rw-r--r--arch/powerpc/platforms/pseries/firmware.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
new file mode 100644
index 00000000000..c01d8f0cbe6
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/firmware.c
@@ -0,0 +1,103 @@
+/*
+ * pSeries firmware setup code.
+ *
+ * Portions from arch/powerpc/platforms/pseries/setup.c:
+ * Copyright (C) 1995 Linus Torvalds
+ * Adapted from 'alpha' version by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ * Modified by PPC64 Team, IBM Corp
+ *
+ * Portions from arch/powerpc/kernel/firmware.c
+ * Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
+ * Modifications for ppc64:
+ * Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
+ * Copyright (C) 2005 Stephen Rothwell, IBM Corporation
+ *
+ * Copyright 2006 IBM Corporation.
+ *
+ * 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.
+ */
+
+#undef DEBUG
+
+#include <asm/firmware.h>
+#include <asm/prom.h>
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+typedef struct {
+ unsigned long val;
+ char * name;
+} firmware_feature_t;
+
+static __initdata firmware_feature_t
+firmware_features_table[FIRMWARE_MAX_FEATURES] = {
+ {FW_FEATURE_PFT, "hcall-pft"},
+ {FW_FEATURE_TCE, "hcall-tce"},
+ {FW_FEATURE_SPRG0, "hcall-sprg0"},
+ {FW_FEATURE_DABR, "hcall-dabr"},
+ {FW_FEATURE_COPY, "hcall-copy"},
+ {FW_FEATURE_ASR, "hcall-asr"},
+ {FW_FEATURE_DEBUG, "hcall-debug"},
+ {FW_FEATURE_PERF, "hcall-perf"},
+ {FW_FEATURE_DUMP, "hcall-dump"},
+ {FW_FEATURE_INTERRUPT, "hcall-interrupt"},
+ {FW_FEATURE_MIGRATE, "hcall-migrate"},
+ {FW_FEATURE_PERFMON, "hcall-perfmon"},
+ {FW_FEATURE_CRQ, "hcall-crq"},
+ {FW_FEATURE_VIO, "hcall-vio"},
+ {FW_FEATURE_RDMA, "hcall-rdma"},
+ {FW_FEATURE_LLAN, "hcall-lLAN"},
+ {FW_FEATURE_BULK, "hcall-bulk"},
+ {FW_FEATURE_XDABR, "hcall-xdabr"},
+ {FW_FEATURE_MULTITCE, "hcall-multi-tce"},
+ {FW_FEATURE_SPLPAR, "hcall-splpar"},
+};
+
+/* Build up the firmware features bitmask using the contents of
+ * device-tree/ibm,hypertas-functions. Ultimately this functionality may
+ * be moved into prom.c prom_init().
+ */
+void __init fw_feature_init(void)
+{
+ struct device_node *dn;
+ char *hypertas, *s;
+ int len, i;
+
+ DBG(" -> fw_feature_init()\n");
+
+ dn = of_find_node_by_path("/rtas");
+ if (dn == NULL) {
+ printk(KERN_ERR "WARNING! Cannot find RTAS in device-tree!\n");
+ goto out;
+ }
+
+ hypertas = get_property(dn, "ibm,hypertas-functions", &len);
+ if (hypertas == NULL)
+ goto out;
+
+ for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
+ for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
+ /* check value against table of strings */
+ if (!firmware_features_table[i].name ||
+ strcmp(firmware_features_table[i].name, s))
+ continue;
+
+ /* we have a match */
+ powerpc_firmware_features |=
+ firmware_features_table[i].val;
+ break;
+ }
+ }
+
+out:
+ of_node_put(dn);
+ DBG(" <- fw_feature_init()\n");
+}