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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
//
// Copyright 2002,2003,2004 Segher Boessenkool <segher@kernel.crashing.org>
//
#define XSTR(x) #x
#define ISTR(x,y) XSTR(x.y)
#undef unix
#include "paflof.h"
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <ctype.h>
#include <cache.h>
#include <allocator.h>
#include ISTR(TARG,h)
#define LAST_ELEMENT(x) x[sizeof x / sizeof x[0] - 1]
/* Hack to get around static inline issues */
#include "../lib/libhvcall/libhvcall.h"
extern char _start_OF[];
unsigned long fdt_start;
unsigned long romfs_base;
unsigned long epapr_magic;
unsigned long epapr_ima_size; // ePAPR initially mapped area size
unsigned char hash_table[HASHSIZE*CELLSIZE];
static int init_engine;
#include ISTR(TARG,c)
static int did_stackwarning;
extern char the_system_stack[];
// the actual engine
long engine(int mode, long param_1, long param_2)
{
// For Exceptions:
// mode = ENGINE_MODE_PARAM_1 | MODE_PARAM_2
// (param_1 = error, param_2 = reason)
//
// For Push:
// mode = ENGINE_MODE_PARAM_1 | ENGINE_MODE_NOP
//
// For Pop:
// mode = ENGINE_MODE_NOP | ENGINE_MODE_POP
//
// For Evaluate:
// mode = ENGINE_MODE_PARAM_1 | MODE_PARAM_2 | ENGINE_MODE_EVAL
// (param_1 = strlen(string), param_2 = string)
cell *restrict ip;
cell *restrict cfa;
static cell handler_stack[160];
static cell c_return[2];
static cell dummy;
#include "prep.h"
#include "dict.xt"
if (init_engine == 0) {
// one-time initialisation
init_engine = 1;
LAST_ELEMENT(xt_FORTH_X2d_WORDLIST).a = xt_LASTWORD;
// stack-pointers
dp = (cell *)((type_u)the_data_stack - CELLSIZE);
rp = (cell *)((type_u)handler_stack - CELLSIZE);
// return-address for "evaluate" personality
dummy.a = &&over;
c_return[1].a = &dummy;
}
if ((char *)&ip < the_system_stack && !did_stackwarning) {
fprintf(stderr, "\nERROR: stack overflow in engine()!\n");
did_stackwarning = 1;
}
if (mode & ENGINE_MODE_PARAM_2) {
(++dp)->n = param_2;
}
if (mode & ENGINE_MODE_PARAM_1) {
(++dp)->n = param_1;
}
if (mode & ENGINE_MODE_NOP ) {
goto over;
}
if (mode & ENGINE_MODE_EVAL) {
(++rp)->a = c_return;
ip = xt_EVALUATE + 2 + ((10 + CELLSIZE - 1) / CELLSIZE);
} else {
ip = xt_SYSTHROW;
}
#include "prim.code"
#include "board.code"
#include ISTR(TARG,code)
// Only reached in case of non-exception call
over: if (mode & ENGINE_MODE_POP) {
return ((dp--)->n);
} else {
return 0;
}
}
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