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-rw-r--r--sim/erc32/interf.c526
1 files changed, 526 insertions, 0 deletions
diff --git a/sim/erc32/interf.c b/sim/erc32/interf.c
new file mode 100644
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--- /dev/null
+++ b/sim/erc32/interf.c
@@ -0,0 +1,526 @@
+/*
+ * This file is part of SIS.
+ *
+ * SIS, SPARC instruction simulator V1.6 Copyright (C) 1995 Jiri Gaisler,
+ * European Space Agency
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 675
+ * Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <signal.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/fcntl.h>
+#include "sis.h"
+#include "bfd.h"
+#include <dis-asm.h>
+#include "sim-config.h"
+
+#include "remote-sim.h"
+
+#ifndef fprintf
+extern fprintf();
+#endif
+
+#define PSR_CWP 0x7
+
+#define VAL(x) strtol(x,(char **)NULL,0)
+
+extern char **buildargv(char *input);
+
+extern struct disassemble_info dinfo;
+extern struct pstate sregs;
+extern struct estate ebase;
+
+extern int current_target_byte_order;
+extern int ctrl_c;
+extern int nfp;
+extern int ift;
+extern int rom8;
+extern int wrp;
+extern int uben;
+extern int sis_verbose;
+extern char *sis_version;
+extern struct estate ebase;
+extern struct evcell evbuf[];
+extern struct irqcell irqarr[];
+extern int irqpend, ext_irl;
+extern int sparclite;
+extern int dumbio;
+extern int sparclite_board;
+extern int termsave;
+extern char uart_dev1[], uart_dev2[];
+
+int sis_gdb_break = 1;
+
+host_callback *sim_callback;
+
+int
+run_sim(sregs, icount, dis)
+ struct pstate *sregs;
+ unsigned int icount;
+ int dis;
+{
+ int mexc, irq;
+
+ if (sis_verbose)
+ (*sim_callback->printf_filtered) (sim_callback, "resuming at %x\n",
+ sregs->pc);
+ init_stdio();
+ sregs->starttime = time(NULL);
+ irq = 0;
+ while (!sregs->err_mode & (icount > 0)) {
+
+ sregs->fhold = 0;
+ sregs->hold = 0;
+ sregs->icnt = 1;
+
+ if (sregs->psr & 0x080)
+ sregs->asi = 8;
+ else
+ sregs->asi = 9;
+
+#if 0 /* DELETE ME! for debugging purposes only */
+ if (sis_verbose > 1)
+ if (sregs->pc == 0 || sregs->npc == 0)
+ printf ("bogus pc or npc\n");
+#endif
+ mexc = memory_read(sregs->asi, sregs->pc, &sregs->inst,
+ 2, &sregs->hold);
+#if 1 /* DELETE ME! for debugging purposes only */
+ if (sis_verbose > 2)
+ printf("pc %x, np %x, sp %x, fp %x, wm %x, cw %x, i %08x\n",
+ sregs->pc, sregs->npc,
+ sregs->r[(((sregs->psr & 7) << 4) + 14) & 0x7f],
+ sregs->r[(((sregs->psr & 7) << 4) + 30) & 0x7f],
+ sregs->wim,
+ sregs->psr & 7,
+ sregs->inst);
+#endif
+ if (sregs->annul) {
+ sregs->annul = 0;
+ sregs->icnt = 1;
+ sregs->pc = sregs->npc;
+ sregs->npc = sregs->npc + 4;
+ } else {
+ if (ext_irl) irq = check_interrupts(sregs);
+ if (!irq) {
+ if (mexc) {
+ sregs->trap = I_ACC_EXC;
+ } else {
+ if ((sis_gdb_break) && (sregs->inst == 0x91d02001)) {
+ if (sis_verbose)
+ (*sim_callback->printf_filtered) (sim_callback,
+ "SW BP hit at %x\n", sregs->pc);
+ sim_halt();
+ restore_stdio();
+ clearerr(stdin);
+ return (BPT_HIT);
+ } else
+ dispatch_instruction(sregs);
+ }
+ icount--;
+ }
+ if (sregs->trap) {
+ irq = 0;
+ sregs->err_mode = execute_trap(sregs);
+ }
+ }
+ advance_time(sregs);
+ if (ctrl_c) {
+ icount = 0;
+ }
+ }
+ sim_halt();
+ sregs->tottime += time(NULL) - sregs->starttime;
+ restore_stdio();
+ clearerr(stdin);
+ if (sregs->err_mode)
+ error_mode(sregs->pc);
+ if (sregs->err_mode)
+ return (ERROR);
+ if (sregs->bphit) {
+ if (sis_verbose)
+ (*sim_callback->printf_filtered) (sim_callback,
+ "HW BP hit at %x\n", sregs->pc);
+ return (BPT_HIT);
+ }
+ if (ctrl_c) {
+ ctrl_c = 0;
+ return (CTRL_C);
+ }
+ return (TIME_OUT);
+}
+
+void
+sim_set_callbacks (ptr)
+ host_callback *ptr;
+{
+ sim_callback = ptr;
+}
+
+void
+sim_size (memsize)
+ int memsize;
+{
+}
+
+SIM_DESC
+sim_open (kind, callback, abfd, argv)
+ SIM_OPEN_KIND kind;
+ struct host_callback_struct *callback;
+ struct _bfd *abfd;
+ char **argv;
+{
+
+ int argc = 0;
+ int stat = 1;
+ int freq = 0;
+
+ sim_callback = callback;
+
+ while (argv[argc])
+ argc++;
+ while (stat < argc) {
+ if (argv[stat][0] == '-') {
+ if (strcmp(argv[stat], "-v") == 0) {
+ sis_verbose++;
+ } else
+ if (strcmp(argv[stat], "-nfp") == 0) {
+ nfp = 1;
+ } else
+ if (strcmp(argv[stat], "-ift") == 0) {
+ ift = 1;
+ } else
+ if (strcmp(argv[stat], "-sparclite") == 0) {
+ sparclite = 1;
+ } else
+ if (strcmp(argv[stat], "-sparclite-board") == 0) {
+ sparclite_board = 1;
+ } else
+ if (strcmp(argv[stat], "-dumbio") == 0) {
+ dumbio = 1;
+ } else
+ if (strcmp(argv[stat], "-wrp") == 0) {
+ wrp = 1;
+ } else
+ if (strcmp(argv[stat], "-rom8") == 0) {
+ rom8 = 1;
+ } else
+ if (strcmp(argv[stat], "-uben") == 0) {
+ uben = 1;
+ } else
+ if (strcmp(argv[stat], "-uart1") == 0) {
+ if ((stat + 1) < argc)
+ strcpy(uart_dev1, argv[++stat]);
+ } else
+ if (strcmp(argv[stat], "-uart2") == 0) {
+ if ((stat + 1) < argc)
+ strcpy(uart_dev2, argv[++stat]);
+ } else
+ if (strcmp(argv[stat], "-nogdb") == 0) {
+ sis_gdb_break = 0;
+ } else
+ if (strcmp(argv[stat], "-freq") == 0) {
+ if ((stat + 1) < argc) {
+ freq = VAL(argv[++stat]);
+ }
+ } else {
+ (*sim_callback->printf_filtered) (sim_callback,
+ "unknown option %s\n",
+ argv[stat]);
+ }
+ } else
+ bfd_load(argv[stat]);
+ stat++;
+ }
+
+ if (sis_verbose) {
+ (*sim_callback->printf_filtered) (sim_callback, "\n SIS - SPARC instruction simulator %s\n", sis_version);
+ (*sim_callback->printf_filtered) (sim_callback, " Bug-reports to Jiri Gaisler ESA/ESTEC (jgais@wd.estec.esa.nl)\n");
+ if (nfp)
+ (*sim_callback->printf_filtered) (sim_callback, "no FPU\n");
+ if (sparclite)
+ (*sim_callback->printf_filtered) (sim_callback, "simulating Sparclite\n");
+ if (dumbio)
+ (*sim_callback->printf_filtered) (sim_callback, "dumb IO (no input, dumb output)\n");
+ if (sis_gdb_break == 0)
+ (*sim_callback->printf_filtered) (sim_callback, "disabling GDB trap handling for breakpoints\n");
+ if (freq)
+ (*sim_callback->printf_filtered) (sim_callback, " ERC32 freq %d Mhz\n", freq);
+ }
+
+ sregs.freq = freq ? freq : 15;
+ termsave = fcntl(0, F_GETFL, 0);
+ INIT_DISASSEMBLE_INFO(dinfo, stdout,(fprintf_ftype)fprintf);
+ dinfo.endian = BFD_ENDIAN_BIG;
+ reset_all();
+ ebase.simtime = 0;
+ init_sim();
+ init_bpt(&sregs);
+ reset_stat(&sregs);
+
+ /* Fudge our descriptor for now. */
+ return (SIM_DESC) 1;
+}
+
+void
+sim_close(sd, quitting)
+ SIM_DESC sd;
+ int quitting;
+{
+
+ exit_sim();
+ fcntl(0, F_SETFL, termsave);
+
+};
+
+SIM_RC
+sim_load(sd, prog, abfd, from_tty)
+ SIM_DESC sd;
+ char *prog;
+ bfd *abfd;
+ int from_tty;
+{
+ bfd_load (prog);
+ return SIM_RC_OK;
+}
+
+SIM_RC
+sim_create_inferior(sd, abfd, argv, env)
+ SIM_DESC sd;
+ struct _bfd *abfd;
+ char **argv;
+ char **env;
+{
+ bfd_vma start_address = 0;
+ if (abfd != NULL)
+ start_address = bfd_get_start_address (abfd);
+
+ ebase.simtime = 0;
+ reset_all();
+ reset_stat(&sregs);
+ sregs.pc = start_address & ~3;
+ sregs.npc = sregs.pc + 4;
+ return SIM_RC_OK;
+}
+
+int
+sim_store_register(sd, regno, value, length)
+ SIM_DESC sd;
+ int regno;
+ unsigned char *value;
+ int length;
+{
+ /* FIXME: Review the computation of regval. */
+ int regval;
+ if (current_target_byte_order == BIG_ENDIAN)
+ regval = (value[0] << 24) | (value[1] << 16)
+ | (value[2] << 8) | value[3];
+ else
+ regval = (value[3] << 24) | (value[2] << 16)
+ | (value[1] << 8) | value[0];
+ set_regi(&sregs, regno, regval);
+ return -1;
+}
+
+
+int
+sim_fetch_register(sd, regno, buf, length)
+ SIM_DESC sd;
+ int regno;
+ unsigned char *buf;
+ int length;
+{
+ get_regi(&sregs, regno, buf);
+ return -1;
+}
+
+int
+sim_write(sd, mem, buf, length)
+ SIM_DESC sd;
+ SIM_ADDR mem;
+ unsigned char *buf;
+ int length;
+{
+ return (sis_memory_write(mem, buf, length));
+}
+
+int
+sim_read(sd, mem, buf, length)
+ SIM_DESC sd;
+ SIM_ADDR mem;
+ unsigned char *buf;
+ int length;
+{
+ return (sis_memory_read(mem, buf, length));
+}
+
+void
+sim_info(sd, verbose)
+ SIM_DESC sd;
+ int verbose;
+{
+ show_stat(&sregs);
+}
+
+int simstat = OK;
+
+void
+sim_stop_reason(sd, reason, sigrc)
+ SIM_DESC sd;
+ enum sim_stop * reason;
+ int *sigrc;
+{
+
+ switch (simstat) {
+ case CTRL_C:
+ *reason = sim_stopped;
+ *sigrc = SIGINT;
+ break;
+ case OK:
+ case TIME_OUT:
+ case BPT_HIT:
+ *reason = sim_stopped;
+#ifdef _WIN32
+#define SIGTRAP 5
+#endif
+ *sigrc = SIGTRAP;
+ break;
+ case ERROR:
+ *sigrc = 0;
+ *reason = sim_exited;
+ }
+ ctrl_c = 0;
+ simstat = OK;
+}
+
+/* Flush all register windows out to the stack. Starting after the invalid
+ window, flush all windows up to, and including the current window. This
+ allows GDB to do backtraces and look at local variables for frames that
+ are still in the register windows. Note that strictly speaking, this
+ behavior is *wrong* for several reasons. First, it doesn't use the window
+ overflow handlers. It therefore assumes standard frame layouts and window
+ handling policies. Second, it changes system state behind the back of the
+ target program. I expect this to mainly pose problems when debugging trap
+ handlers.
+*/
+
+static void
+flush_windows ()
+{
+ int invwin;
+ int cwp;
+ int win;
+ int ws;
+
+ /* Keep current window handy */
+
+ cwp = sregs.psr & PSR_CWP;
+
+ /* Calculate the invalid window from the wim. */
+
+ for (invwin = 0; invwin <= PSR_CWP; invwin++)
+ if ((sregs.wim >> invwin) & 1)
+ break;
+
+ /* Start saving with the window after the invalid window. */
+
+ invwin = (invwin - 1) & PSR_CWP;
+
+ for (win = invwin; ; win = (win - 1) & PSR_CWP)
+ {
+ uint32 sp;
+ int i;
+
+ sp = sregs.r[(win * 16 + 14) & 0x7f];
+#if 1
+ if (sis_verbose > 2) {
+ uint32 fp = sregs.r[(win * 16 + 30) & 0x7f];
+ printf("flush_window: win %d, sp %x, fp %x\n", win, sp, fp);
+ }
+#endif
+
+ for (i = 0; i < 16; i++)
+ memory_write (11, sp + 4 * i, &sregs.r[(win * 16 + 16 + i) & 0x7f], 2,
+ &ws);
+
+ if (win == cwp)
+ break;
+ }
+}
+
+void
+sim_resume(SIM_DESC sd, int step, int siggnal)
+{
+ simstat = run_sim(&sregs, -1, 0);
+
+ if (sis_gdb_break) flush_windows ();
+}
+
+int
+sim_trace (sd)
+ SIM_DESC sd;
+{
+ /* FIXME: unfinished */
+ sim_resume (sd, 0, 0);
+ return 1;
+}
+
+void
+sim_do_command(sd, cmd)
+ SIM_DESC sd;
+ char *cmd;
+{
+ exec_cmd(&sregs, cmd);
+}
+
+#if 0 /* FIXME: These shouldn't exist. */
+
+int
+sim_insert_breakpoint(int addr)
+{
+ if (sregs.bptnum < BPT_MAX) {
+ sregs.bpts[sregs.bptnum] = addr & ~0x3;
+ sregs.bptnum++;
+ if (sis_verbose)
+ (*sim_callback->printf_filtered) (sim_callback, "inserted HW BP at %x\n", addr);
+ return 0;
+ } else
+ return 1;
+}
+
+int
+sim_remove_breakpoint(int addr)
+{
+ int i = 0;
+
+ while ((i < sregs.bptnum) && (sregs.bpts[i] != addr))
+ i++;
+ if (addr == sregs.bpts[i]) {
+ for (; i < sregs.bptnum - 1; i++)
+ sregs.bpts[i] = sregs.bpts[i + 1];
+ sregs.bptnum -= 1;
+ if (sis_verbose)
+ (*sim_callback->printf_filtered) (sim_callback, "removed HW BP at %x\n", addr);
+ return 0;
+ }
+ return 1;
+}
+
+#endif
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