2 mcs51 specific general functions.
4 Note that mlh prepended _mcs51_ on the static functions. Makes
5 it easier to set a breakpoint using the debugger.
12 static char _defaultRules[] =
17 /* list of key words used by msc51 */
18 static char *_mcs51_keywords[] = {
45 void mcs51_assignRegisters (eBBlock **ebbs, int count);
47 static int regParmFlg = 0; /* determine if we can register a parameter */
49 static void _mcs51_init(void)
51 asm_addTree(&asm_asxxxx_mapping);
54 static void _mcs51_reset_regparm()
59 static int _mcs51_regparm( link *l)
61 /* for this processor it is simple
62 can pass only the first parameter in a register */
70 static bool _mcs51_parseOptions(int *pargc, char **argv, int *i)
72 /* TODO: allow port-specific command line options to specify
78 static void _mcs51_finaliseOptions(void)
80 /* Hack-o-matic: if we are using the flat24 model,
81 * adjust pointer sizes.
83 if (options.model == MODEL_FLAT24)
85 port->s.fptr_size = 3;
86 port->s.gptr_size = 4;
87 port->stack.isr_overhead++; /* Will save dpx on ISR entry. */
89 port->stack.call_overhead++; /* This acounts for the extra byte
90 * of return addres on the stack.
91 * but is ugly. There must be a
100 port->mem.default_local_map = xdata;
101 port->mem.default_globl_map = xdata;
103 port->mem.default_local_map = data;
104 port->mem.default_globl_map = data;
107 if (options.stack10bit)
109 if (options.model != MODEL_FLAT24)
112 "*** warning: 10 bit stack mode is only supported in flat24 model.\n");
113 fprintf(stderr, "\t10 bit stack mode disabled.\n");
114 options.stack10bit = 0;
118 /* Fixup the memory map for the stack; it is now in
119 * far space and requires a FPOINTER to access it.
122 istack->ptrType = FPOINTER;
127 static void _mcs51_setDefaultOptions(void)
131 static const char *_mcs51_getRegName(struct regs *reg)
138 static void _mcs51_genAssemblerPreamble(FILE *of)
140 if (options.model == MODEL_FLAT24)
142 fputs(".flat24 on\t\t; 24 bit flat addressing\n", of);
143 fputs("dpx = 0x93\t\t; dpx register unknown to assembler\n", of);
144 fputs("dps = 0x86\t\t; dps register unknown to assembler\n", of);
145 fputs("dpl1 = 0x84\t\t; dpl1 register unknown to assembler\n", of);
146 fputs("dph1 = 0x85\t\t; dph1 register unknown to assembler\n", of);
147 fputs("dpx1 = 0x95\t\t; dpx1 register unknown to assembler\n", of);
151 /* Generate interrupt vector table. */
152 static int _mcs51_genIVT(FILE *of, symbol **interrupts, int maxInterrupts)
156 if (options.model != MODEL_FLAT24)
158 /* Let the default code handle it. */
162 fprintf (of, "\tajmp\t__sdcc_gsinit_startup\n");
164 /* now for the other interrupts */
165 for (i = 0; i < maxInterrupts; i++)
169 fprintf(of, "\tljmp\t%s\n\t.ds\t4\n", interrupts[i]->rname);
173 fprintf(of, "\treti\n\t.ds\t7\n");
180 /** $1 is always the basename.
181 $2 is always the output file.
183 $l is the list of extra options that should be there somewhere...
184 MUST be terminated with a NULL.
186 static const char *_linkCmd[] = {
187 "aslink", "-nf", "$1", NULL
190 static const char *_asmCmd[] = {
191 "asx8051", "-plosgffc", "$1.asm", NULL
197 "MCU 8051", /* Target name */
199 TRUE, /* Emit glue around main */
203 "-plosgffc", /* Options with debug */
204 "-plosgff", /* Options without debug */
214 /* Sizes: char, short, int, long, ptr, fptr, gptr, bit, float, max */
215 1, 1, 2, 4, 1, 2, 3, 1, 4, 4
236 /* mcs51 has an 8 bit mul */
243 _mcs51_finaliseOptions,
244 _mcs51_setDefaultOptions,
245 mcs51_assignRegisters,
248 _mcs51_genAssemblerPreamble,
250 _mcs51_reset_regparm,