mirror of https://gitee.com/openkylin/linux.git
104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
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/*
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* pSeries firmware setup code.
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*
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* Portions from arch/powerpc/platforms/pseries/setup.c:
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* Copyright (C) 1995 Linus Torvalds
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* Adapted from 'alpha' version by Gary Thomas
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* Modified by Cort Dougan (cort@cs.nmt.edu)
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* Modified by PPC64 Team, IBM Corp
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*
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* Portions from arch/powerpc/kernel/firmware.c
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* Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
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* Modifications for ppc64:
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* Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
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* Copyright (C) 2005 Stephen Rothwell, IBM Corporation
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*
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* Copyright 2006 IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG
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#include <asm/firmware.h>
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#include <asm/prom.h>
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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typedef struct {
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unsigned long val;
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char * name;
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} firmware_feature_t;
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static __initdata firmware_feature_t
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firmware_features_table[FIRMWARE_MAX_FEATURES] = {
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{FW_FEATURE_PFT, "hcall-pft"},
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{FW_FEATURE_TCE, "hcall-tce"},
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{FW_FEATURE_SPRG0, "hcall-sprg0"},
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{FW_FEATURE_DABR, "hcall-dabr"},
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{FW_FEATURE_COPY, "hcall-copy"},
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{FW_FEATURE_ASR, "hcall-asr"},
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{FW_FEATURE_DEBUG, "hcall-debug"},
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{FW_FEATURE_PERF, "hcall-perf"},
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{FW_FEATURE_DUMP, "hcall-dump"},
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{FW_FEATURE_INTERRUPT, "hcall-interrupt"},
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{FW_FEATURE_MIGRATE, "hcall-migrate"},
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{FW_FEATURE_PERFMON, "hcall-perfmon"},
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{FW_FEATURE_CRQ, "hcall-crq"},
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{FW_FEATURE_VIO, "hcall-vio"},
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{FW_FEATURE_RDMA, "hcall-rdma"},
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{FW_FEATURE_LLAN, "hcall-lLAN"},
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{FW_FEATURE_BULK, "hcall-bulk"},
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{FW_FEATURE_XDABR, "hcall-xdabr"},
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{FW_FEATURE_MULTITCE, "hcall-multi-tce"},
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{FW_FEATURE_SPLPAR, "hcall-splpar"},
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};
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/* Build up the firmware features bitmask using the contents of
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* device-tree/ibm,hypertas-functions. Ultimately this functionality may
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* be moved into prom.c prom_init().
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*/
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void __init fw_feature_init(void)
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{
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struct device_node *dn;
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char *hypertas, *s;
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int len, i;
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DBG(" -> fw_feature_init()\n");
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dn = of_find_node_by_path("/rtas");
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if (dn == NULL) {
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printk(KERN_ERR "WARNING! Cannot find RTAS in device-tree!\n");
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goto out;
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}
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hypertas = get_property(dn, "ibm,hypertas-functions", &len);
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if (hypertas == NULL)
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goto out;
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for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) {
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for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) {
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/* check value against table of strings */
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if (!firmware_features_table[i].name ||
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strcmp(firmware_features_table[i].name, s))
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continue;
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/* we have a match */
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ppc64_firmware_features |=
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firmware_features_table[i].val;
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break;
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}
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}
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out:
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of_node_put(dn);
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DBG(" <- fw_feature_init()\n");
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}
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