diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/firmware.c')
-rw-r--r-- | arch/powerpc/platforms/pseries/firmware.c | 103 |
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"); +} |