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dpavlin |
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/* |
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* Cisco router simulation platform. |
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* Copyright (c) 2007 Christophe Fillot (cf@utc.fr) |
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* |
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* JIT operations. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/mman.h> |
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#include <signal.h> |
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#include <fcntl.h> |
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#include <assert.h> |
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#include "cpu.h" |
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#include "jit_op.h" |
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u_int jit_op_blk_sizes[JIT_OP_POOL_NR] = { |
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0, 32, 64, 128, 256, 384, 512, 1024, |
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}; |
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/* Get a JIT op (allocate one if necessary) */ |
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jit_op_t *jit_op_get(cpu_gen_t *cpu,int size_index,u_int opcode) |
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{ |
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jit_op_t *op; |
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size_t len; |
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assert(size_index < JIT_OP_POOL_NR); |
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op = cpu->jit_op_pool[size_index]; |
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if (op != NULL) { |
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assert(op->ob_size_index == size_index); |
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cpu->jit_op_pool[size_index] = op->next; |
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} else { |
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/* no block found, allocate one */ |
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len = sizeof(*op) + jit_op_blk_sizes[size_index]; |
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op = malloc(len); |
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assert(op != NULL); |
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op->ob_size_index = size_index; |
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} |
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op->opcode = opcode; |
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op->param[0] = op->param[1] = op->param[2] = -1; |
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op->next = NULL; |
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op->ob_ptr = op->ob_data; |
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op->arg_ptr = NULL; |
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op->insn_name = NULL; |
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return op; |
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} |
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/* Release a JIT op */ |
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void jit_op_free(cpu_gen_t *cpu,jit_op_t *op) |
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{ |
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assert(op->ob_size_index < JIT_OP_POOL_NR); |
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op->next = cpu->jit_op_pool[op->ob_size_index]; |
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cpu->jit_op_pool[op->ob_size_index] = op; |
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} |
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/* Free a list of JIT ops */ |
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void jit_op_free_list(cpu_gen_t *cpu,jit_op_t *op_list) |
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{ |
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jit_op_t *op,*opn; |
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for(op=op_list;op;op=opn) { |
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opn = op->next; |
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jit_op_free(cpu,op); |
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} |
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} |
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/* Initialize JIT op pools for the specified CPU */ |
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int jit_op_init_cpu(cpu_gen_t *cpu) |
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{ |
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cpu->jit_op_array = calloc(cpu->jit_op_array_size,sizeof(jit_op_t *)); |
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if (!cpu->jit_op_array) |
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return(-1); |
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memset(cpu->jit_op_pool,0,sizeof(cpu->jit_op_pool)); |
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return(0); |
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} |
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/* Free memory used by pools */ |
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void jit_op_free_pools(cpu_gen_t *cpu) |
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{ |
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jit_op_t *op,*opn; |
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int i; |
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for(i=0;i<JIT_OP_POOL_NR;i++) { |
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for(op=cpu->jit_op_pool[i];op;op=opn) { |
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opn = op->next; |
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free(op); |
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} |
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cpu->jit_op_pool[i] = NULL; |
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} |
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} |