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[/] [openrisc/] [trunk/] [or1ksim/] [cpu-config.c] - Rev 304
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/* cpu-config.c -- CPU configuration Copyright (C) 1999 Damjan Lampret, lampret@opencores.org Copyright (C) 2008 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of OpenRISC 1000 Architectural Simulator. 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 3 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, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ /* Broken out from sim-config.c */ /* Autoconf and/or portability configuration */ #include "config.h" /* System includes */ #include <stdio.h> /* Package includes */ #include "cpu-config.h" #include "sim-config.h" #include "spr-defs.h" #include "execute.h" #define WARNING(s) fprintf (stderr, "Warning: config.cpu: %s\n", (s)) /*---------------------------------------------------------------------------*/ /*!Set the CPU version Value must be an 8-bit integer. Larger values are truncated with a warning. @param[in] val The value to use @param[in] dat The config data structure (not used here) */ /*---------------------------------------------------------------------------*/ static void cpu_ver (union param_val val, void *dat) { if (val.int_val > 0xff) { WARNING ("CPU version > 8 bits truncated\n"); } cpu_state.sprs[SPR_VR] &= ~SPR_VR_VER; cpu_state.sprs[SPR_VR] |= (val.int_val & 0xff) << SPR_VR_VER_OFF; } /* cpu_ver() */ /*---------------------------------------------------------------------------*/ /*!Set the CPU configuration Value must be an 8-bit integer. Larger values are truncated with a warning. @param[in] val The value to use @param[in] dat The config data structure (not used here) */ /*---------------------------------------------------------------------------*/ static void cpu_cfg (union param_val val, void *dat) { if (val.int_val > 0xff) { WARNING ("CPU configuration > 8 bits truncated\n"); } cpu_state.sprs[SPR_VR] &= ~SPR_VR_CFG; cpu_state.sprs[SPR_VR] |= (val.int_val & 0xff) << SPR_VR_CFG_OFF; } /* cpu_cfg() */ /*---------------------------------------------------------------------------*/ /*!Set the CPU revision Value must be an 6-bit integer. Larger values are truncated with a warning. @param[in] val The value to use @param[in] dat The config data structure (not used here) */ /*---------------------------------------------------------------------------*/ static void cpu_rev (union param_val val, void *dat) { if (val.int_val > 0x3f) { WARNING ("CPU revision > 6 bits truncated\n"); } cpu_state.sprs[SPR_VR] &= ~SPR_VR_REV_OFF ; cpu_state.sprs[SPR_VR] |= (val.int_val & 0x3f) << SPR_VR_REV_OFF ; } /* cpu_rev() */ static void cpu_upr (union param_val val, void *dat) { cpu_state.sprs[SPR_UPR] = val.int_val; } /*---------------------------------------------------------------------------*/ /*!Set the CPU configuration Value must be just the OB32S instruction set bit. Nothing else is currently supported. If other values are specified, they will be set, but with a warning. @param[in] val The value to use @param[in] dat The config data structure (not used here) */ /*---------------------------------------------------------------------------*/ static void cpu_cfgr (union param_val val, void *dat) { if (SPR_CPUCFGR_OB32S != val.int_val) { WARNING ("CPU configuration: only OB32S currently supported\n"); } cpu_state.sprs[SPR_CPUCFGR] = val.int_val; } /* cpu_cfgr() */ /*---------------------------------------------------------------------------*/ /*!Set the CPU supervision register Only the lowest 17 bits may be set. The top 4 bits are for context ID's (not currently supported), the rest are reserved and should not be set. If such values are specified, the value will be set (it has no effect), but with a warning. @param[in] val The value to use @param[in] dat The config data structure (not used here) */ /*---------------------------------------------------------------------------*/ static void cpu_sr (union param_val val, void *dat) { if (0 != (val.int_val & 0xf0000000)) { WARNING ("Supervision Register ContextID not supported: ignored\n"); } else if (val.int_val > 0x1ffff) { WARNING ("Supervision Register reserved bits set: ignored\n"); } cpu_state.sprs[SPR_SR] = val.int_val; } /* cpu_sr() */ static void cpu_hazards (union param_val val, void *dat) { config.cpu.hazards = val.int_val; } static void cpu_superscalar (union param_val val, void *dat) { config.cpu.superscalar = val.int_val; } static void cpu_dependstats (union param_val val, void *dat) { config.cpu.dependstats = val.int_val; } static void cpu_sbuf_len (union param_val val, void *dat) { if (val.int_val >= MAX_SBUF_LEN) { config.cpu.sbuf_len = MAX_SBUF_LEN - 1; WARNING ("sbuf_len too large; truncated."); } else if (val.int_val < 0) { config.cpu.sbuf_len = 0; WARNING ("sbuf_len negative; disabled."); } else config.cpu.sbuf_len = val.int_val; } static void cpu_hardfloat (union param_val val, void *dat) { config.cpu.hardfloat = val.int_val; } /*---------------------------------------------------------------------------*/ /*!Register the functions to handle a section cpu This section does not allocate dynamically a data structure holding its config information. It's all in the global config.sim data structure. Therefore it does not need a start and end function to initialize default values (although it might be clearer to do so). The default values are set in init_defconfig(). */ /*---------------------------------------------------------------------------*/ void reg_cpu_sec () { struct config_section *sec = reg_config_sec ("cpu", NULL, NULL); reg_config_param (sec, "ver", PARAMT_INT, cpu_ver); reg_config_param (sec, "cfg", PARAMT_INT, cpu_cfg); reg_config_param (sec, "rev", PARAMT_INT, cpu_rev); reg_config_param (sec, "upr", PARAMT_INT, cpu_upr); reg_config_param (sec, "cfgr", PARAMT_INT, cpu_cfgr); reg_config_param (sec, "sr", PARAMT_INT, cpu_sr); reg_config_param (sec, "superscalar", PARAMT_INT, cpu_superscalar); reg_config_param (sec, "hazards", PARAMT_INT, cpu_hazards); reg_config_param (sec, "dependstats", PARAMT_INT, cpu_dependstats); reg_config_param (sec, "sbuf_len", PARAMT_INT, cpu_sbuf_len); reg_config_param (sec, "hardfloat", PARAMT_INT, cpu_hardfloat); } /* reg_cpu_sec() */
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