/* * Cisco router simulation platform. * Copyright (c) 2006 Christophe Fillot (cf@utc.fr) * * MIPS Instruction Lookup Tables. */ #ifndef __INSN_LOOKUP_H__ #define __INSN_LOOKUP_H__ #include "utils.h" #include "hash.h" /* Forward declaration for instruction lookup table */ typedef struct insn_lookup insn_lookup_t; /* CBM (Class BitMap) array */ #define CBM_SHIFT 5 /* log2(32) */ #define CBM_SIZE (1 << CBM_SHIFT) /* Arrays of 32-bits Integers */ #define CBM_HASH_SIZE 256 /* Size for Hash Tables */ typedef struct cbm_array cbm_array_t; struct cbm_array { int nr_entries; /* Number of entries */ int tab[0]; /* Values... */ }; #define CBM_ARRAY(array,i) ((array)->tab[(i)]) #define CBM_CSIZE(count) (((count)*sizeof(int))+sizeof(cbm_array_t)) /* callback function prototype for instruction checking */ typedef int (*ilt_check_cbk_t)(void *,int value); typedef void *(*ilt_get_insn_cbk_t)(int index); /* RFC (Recursive Flow Classification) arrays */ #define RFC_ARRAY_MAXSIZE 65536 #define RFC_ARRAY_MAXBITS 16 #define RFC_ARRAY_NUMBER 3 typedef struct rfc_array rfc_array_t; struct rfc_array { rfc_array_t *parent0,*parent1; int nr_elements; /* Number of Equivalent ID */ int nr_eqid; /* Hash Table for Class Bitmaps */ hash_table_t *cbm_hash; /* Array to get Class Bitmaps from IDs */ cbm_array_t **id2cbm; /* Equivalent ID (eqID) array */ int eqID[0]; }; /* Equivalent Classes */ typedef struct rfc_eqclass rfc_eqclass_t; struct rfc_eqclass { cbm_array_t *cbm; /* Class Bitmap */ int eqID; /* Index associated to this class */ }; /* Instruction lookup table */ struct insn_lookup { int nr_insn; /* Number of instructions */ int cbm_size; /* Size of Class Bitmaps */ ilt_get_insn_cbk_t get_insn; ilt_check_cbk_t chk_lo,chk_hi; /* RFC tables */ rfc_array_t *rfct[RFC_ARRAY_NUMBER]; }; /* Instruction lookup */ static forced_inline int ilt_get_index(rfc_array_t *a1,rfc_array_t *a2, int i1,int i2) { return((a1->eqID[i1]*a2->nr_eqid) + a2->eqID[i2]); } static forced_inline int ilt_get_idx(insn_lookup_t *ilt,int a1,int a2, int i1,int i2) { return(ilt_get_index(ilt->rfct[a1],ilt->rfct[a2],i1,i2)); } static forced_inline int ilt_lookup(insn_lookup_t *ilt,mips_insn_t insn) { int id_i; id_i = ilt_get_idx(ilt,0,1,insn >> 16,insn & 0xFFFF); return(ilt->rfct[2]->eqID[id_i]); } /* Create an instruction lookup table */ insn_lookup_t *ilt_create(char *table_name, int nr_insn,ilt_get_insn_cbk_t get_insn, ilt_check_cbk_t chk_lo,ilt_check_cbk_t chk_hi); #endif