294 lines
6 KiB
C
294 lines
6 KiB
C
/** @file main.c
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ds390 specific general functions.
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Note that mlh prepended _ds390_ on the static functions. Makes
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it easier to set a breakpoint using the debugger.
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*/
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#include "common.h"
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#include "main.h"
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#include "ralloc.h"
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#include "gen.h"
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static char _defaultRules[] =
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{
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#include "peeph.rul"
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};
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/* list of key words used by msc51 */
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static char *_ds390_keywords[] =
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{
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"at",
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"bit",
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"code",
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"critical",
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"data",
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"far",
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"idata",
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"interrupt",
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"near",
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"pdata",
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"reentrant",
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"sfr",
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"sbit",
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"using",
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"xdata",
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"_data",
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"_code",
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"_generic",
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"_near",
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"_xdata",
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"_pdata",
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"_idata",
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"_naked",
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NULL
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};
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void ds390_assignRegisters (eBBlock ** ebbs, int count);
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static int regParmFlg = 0; /* determine if we can register a parameter */
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static void
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_ds390_init (void)
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{
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asm_addTree (&asm_asxxxx_mapping);
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}
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static void
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_ds390_reset_regparm ()
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{
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regParmFlg = 0;
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}
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static int
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_ds390_regparm (sym_link * l)
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{
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/* for this processor it is simple
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can pass only the first parameter in a register */
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if (regParmFlg)
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return 0;
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regParmFlg = 1;
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return 1;
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}
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static bool
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_ds390_parseOptions (int *pargc, char **argv, int *i)
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{
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/* TODO: allow port-specific command line options to specify
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* segment names here.
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*/
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return FALSE;
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}
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static void
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_ds390_finaliseOptions (void)
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{
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/* Hack-o-matic: if we are using the flat24 model,
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* adjust pointer sizes.
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*/
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if (options.model != MODEL_FLAT24) {
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fprintf (stderr,
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"*** warning: ds390 port small and large model experimental.\n");
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if (options.model == MODEL_LARGE)
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{
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port->mem.default_local_map = xdata;
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port->mem.default_globl_map = xdata;
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}
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else
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{
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port->mem.default_local_map = data;
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port->mem.default_globl_map = data;
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}
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}
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else {
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port->s.fptr_size = 3;
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port->s.gptr_size = 4;
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port->stack.isr_overhead++; /* Will save dpx on ISR entry. */
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port->stack.call_overhead++; /* This acounts for the extra byte
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* of return addres on the stack.
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* but is ugly. There must be a
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* better way.
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*/
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port->mem.default_local_map = xdata;
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port->mem.default_globl_map = xdata;
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if (!options.stack10bit)
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{
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fprintf (stderr,
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"*** error: ds390 port only supports the 10 bit stack mode.\n");
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}
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/* Fixup the memory map for the stack; it is now in
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* far space and requires a FPOINTER to access it.
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*/
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istack->fmap = 1;
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istack->ptrType = FPOINTER;
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} /* MODEL_FLAT24 */
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}
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static void
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_ds390_setDefaultOptions (void)
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{
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options.model=MODEL_FLAT24;
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options.stack10bit=1;
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}
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static const char *
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_ds390_getRegName (struct regs *reg)
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{
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if (reg)
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return reg->name;
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return "err";
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}
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static void
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_ds390_genAssemblerPreamble (FILE * of)
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{
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if (options.model == MODEL_FLAT24)
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fputs (".flat24 on\t\t; 24 bit flat addressing\n", of);
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fputs ("dpx = 0x93\t\t; dpx register unknown to assembler\n", of);
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fputs ("dps = 0x86\t\t; dps register unknown to assembler\n", of);
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fputs ("dpl1 = 0x84\t\t; dpl1 register unknown to assembler\n", of);
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fputs ("dph1 = 0x85\t\t; dph1 register unknown to assembler\n", of);
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fputs ("dpx1 = 0x95\t\t; dpx1 register unknown to assembler\n", of);
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fputs ("ap = 0x9C\t\t; ap register unknown to assembler\n", of);
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fputs ("mcnt0 = 0xD1\t\t; mcnt0 register unknown to assembler\n", of);
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fputs ("mcnt1 = 0xD2\t\t; mcnt1 register unknown to assembler\n", of);
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fputs ("ma = 0xD3\t\t; ma register unknown to assembler\n", of);
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fputs ("mb = 0xD4\t\t; mb register unknown to assembler\n", of);
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fputs ("mc = 0xD5\t\t; mc register unknown to assembler\n", of);
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}
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/* Generate interrupt vector table. */
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static int
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_ds390_genIVT (FILE * of, symbol ** interrupts, int maxInterrupts)
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{
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int i;
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if (options.model != MODEL_FLAT24)
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{
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/* Let the default code handle it. */
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return FALSE;
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}
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fprintf (of, "\tajmp\t__sdcc_gsinit_startup\n");
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/* now for the other interrupts */
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for (i = 0; i < maxInterrupts; i++)
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{
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if (interrupts[i])
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{
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fprintf (of, "\tljmp\t%s\n\t.ds\t4\n", interrupts[i]->rname);
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}
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else
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{
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fprintf (of, "\treti\n\t.ds\t7\n");
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}
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}
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return TRUE;
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}
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/** $1 is always the basename.
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$2 is always the output file.
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$3 varies
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$l is the list of extra options that should be there somewhere...
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MUST be terminated with a NULL.
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*/
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static const char *_linkCmd[] =
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{
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"aslink", "-nf", "$1", NULL
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};
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/* $3 is replaced by assembler.debug_opts resp. port->assembler.plain_opts */ static const char *_asmCmd[] =
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{
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"asx8051", "$l", "$3", "$1.asm", NULL
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};
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/* Globals */
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PORT ds390_port =
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{
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TARGET_ID_DS390,
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"ds390",
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"DS80C390", /* Target name */
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{
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TRUE, /* Emit glue around main */
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MODEL_SMALL | MODEL_LARGE | MODEL_FLAT24,
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MODEL_SMALL
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},
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{
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_asmCmd,
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NULL,
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"-plosgffc", /* Options with debug */
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"-plosgff", /* Options without debug */
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0,
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".asm"
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},
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{
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_linkCmd,
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NULL,
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NULL,
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".rel"
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},
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{
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_defaultRules
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},
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{
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/* Sizes: char, short, int, long, ptr, fptr, gptr, bit, float, max */
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1, 2, 2, 4, 1, 2, 3, 1, 4, 4
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},
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{
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"XSEG (XDATA)",
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"STACK (DATA)",
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"CSEG (CODE)",
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"DSEG (DATA)",
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"ISEG (DATA)",
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"XSEG (XDATA)",
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"BSEG (BIT)",
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"RSEG (DATA)",
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"GSINIT (CODE)",
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"OSEG (OVR,DATA)",
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"GSFINAL (CODE)",
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"HOME (CODE)",
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NULL,
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NULL,
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1
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},
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{
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+1, 1, 4, 1, 1, 0
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},
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/* ds390 has an 16 bit mul & div */
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{
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2, -1
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},
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"_",
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_ds390_init,
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_ds390_parseOptions,
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_ds390_finaliseOptions,
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_ds390_setDefaultOptions,
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ds390_assignRegisters,
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_ds390_getRegName,
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_ds390_keywords,
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_ds390_genAssemblerPreamble,
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_ds390_genIVT,
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_ds390_reset_regparm,
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_ds390_regparm,
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NULL,
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NULL,
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NULL,
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FALSE,
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0, /* leave lt */
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0, /* leave gt */
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1, /* transform <= to ! > */
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1, /* transform >= to ! < */
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1, /* transform != to !(a == b) */
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0, /* leave == */
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TRUE, /* we support array initializers. */
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PORT_MAGIC
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};
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