mirror of
https://github.com/bminor/binutils-gdb.git
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Initial creation of sourceware repository
This commit is contained in:
Stan Shebs
360
sim/v850/interp.c
Normal file
360
sim/v850/interp.c
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@@ -0,0 +1,360 @@
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#include "sim-main.h"
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#include "sim-options.h"
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#include "v850_sim.h"
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#include "sim-assert.h"
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#include "itable.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#include "bfd.h"
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#ifndef INLINE
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#ifdef __GNUC__
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#define INLINE inline
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#else
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#define INLINE
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#endif
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#endif
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static const char * get_insn_name (sim_cpu *, int);
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/* For compatibility */
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SIM_DESC simulator;
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/* v850 interrupt model */
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enum interrupt_type
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{
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int_reset,
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int_nmi,
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int_intov1,
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int_intp10,
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int_intp11,
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int_intp12,
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int_intp13,
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int_intcm4,
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num_int_types
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};
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char *interrupt_names[] = {
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"reset",
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"nmi",
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"intov1",
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"intp10",
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"intp11",
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"intp12",
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"intp13",
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"intcm4",
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NULL
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};
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static void
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do_interrupt (sd, data)
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SIM_DESC sd;
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void *data;
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{
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char **interrupt_name = (char**)data;
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enum interrupt_type inttype;
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inttype = (interrupt_name - STATE_WATCHPOINTS (sd)->interrupt_names);
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/* For a hardware reset, drop everything and jump to the start
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address */
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if (inttype == int_reset)
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{
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PC = 0;
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PSW = 0x20;
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ECR = 0;
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sim_engine_restart (sd, NULL, NULL, NULL_CIA);
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}
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/* Deliver an NMI when allowed */
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if (inttype == int_nmi)
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{
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if (PSW & PSW_NP)
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{
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/* We're already working on an NMI, so this one must wait
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around until the previous one is done. The processor
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ignores subsequent NMIs, so we don't need to count them.
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Just keep re-scheduling a single NMI until it manages to
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be delivered */
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if (STATE_CPU (sd, 0)->pending_nmi != NULL)
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sim_events_deschedule (sd, STATE_CPU (sd, 0)->pending_nmi);
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STATE_CPU (sd, 0)->pending_nmi =
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sim_events_schedule (sd, 1, do_interrupt, data);
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return;
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}
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else
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{
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/* NMI can be delivered. Do not deschedule pending_nmi as
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that, if still in the event queue, is a second NMI that
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needs to be delivered later. */
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FEPC = PC;
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FEPSW = PSW;
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/* Set the FECC part of the ECR. */
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ECR &= 0x0000ffff;
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ECR |= 0x10;
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PSW |= PSW_NP;
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PSW &= ~PSW_EP;
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PSW |= PSW_ID;
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PC = 0x10;
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sim_engine_restart (sd, NULL, NULL, NULL_CIA);
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}
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}
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/* deliver maskable interrupt when allowed */
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if (inttype > int_nmi && inttype < num_int_types)
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{
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if ((PSW & PSW_NP) || (PSW & PSW_ID))
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{
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/* Can't deliver this interrupt, reschedule it for later */
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sim_events_schedule (sd, 1, do_interrupt, data);
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return;
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}
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else
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{
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/* save context */
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EIPC = PC;
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EIPSW = PSW;
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/* Disable further interrupts. */
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PSW |= PSW_ID;
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/* Indicate that we're doing interrupt not exception processing. */
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PSW &= ~PSW_EP;
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/* Clear the EICC part of the ECR, will set below. */
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ECR &= 0xffff0000;
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switch (inttype)
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{
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case int_intov1:
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PC = 0x80;
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ECR |= 0x80;
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break;
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case int_intp10:
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PC = 0x90;
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ECR |= 0x90;
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break;
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case int_intp11:
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PC = 0xa0;
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ECR |= 0xa0;
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break;
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case int_intp12:
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PC = 0xb0;
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ECR |= 0xb0;
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break;
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case int_intp13:
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PC = 0xc0;
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ECR |= 0xc0;
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break;
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case int_intcm4:
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PC = 0xd0;
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ECR |= 0xd0;
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break;
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default:
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/* Should never be possible. */
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sim_engine_abort (sd, NULL, NULL_CIA,
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"do_interrupt - internal error - bad switch");
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break;
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}
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}
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sim_engine_restart (sd, NULL, NULL, NULL_CIA);
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}
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/* some other interrupt? */
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sim_engine_abort (sd, NULL, NULL_CIA,
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"do_interrupt - internal error - interrupt %d unknown",
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inttype);
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}
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/* Return name of an insn, used by insn profiling. */
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static const char *
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get_insn_name (sim_cpu *cpu, int i)
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{
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return itable[i].name;
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}
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/* These default values correspond to expected usage for the chip. */
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uint32 OP[4];
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SIM_DESC
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sim_open (kind, cb, abfd, argv)
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SIM_OPEN_KIND kind;
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host_callback *cb;
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struct _bfd *abfd;
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char **argv;
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{
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SIM_DESC sd = sim_state_alloc (kind, cb);
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int mach;
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SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
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/* for compatibility */
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simulator = sd;
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/* FIXME: should be better way of setting up interrupts */
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STATE_WATCHPOINTS (sd)->pc = &(PC);
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STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);
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STATE_WATCHPOINTS (sd)->interrupt_handler = do_interrupt;
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STATE_WATCHPOINTS (sd)->interrupt_names = interrupt_names;
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/* Initialize the mechanism for doing insn profiling. */
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CPU_INSN_NAME (STATE_CPU (sd, 0)) = get_insn_name;
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CPU_MAX_INSNS (STATE_CPU (sd, 0)) = nr_itable_entries;
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if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
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return 0;
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/* Allocate core managed memory */
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/* "Mirror" the ROM addresses below 1MB. */
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sim_do_commandf (sd, "memory region 0,0x100000,0x%lx", V850_ROM_SIZE);
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/* Chunk of ram adjacent to rom */
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sim_do_commandf (sd, "memory region 0x100000,0x%lx", V850_LOW_END-0x100000);
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/* peripheral I/O region - mirror 1K across 4k (0x1000) */
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sim_do_command (sd, "memory region 0xfff000,0x1000,1024");
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/* similarly if in the internal RAM region */
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sim_do_command (sd, "memory region 0xffe000,0x1000,1024");
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/* getopt will print the error message so we just have to exit if this fails.
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FIXME: Hmmm... in the case of gdb we need getopt to call
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print_filtered. */
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if (sim_parse_args (sd, argv) != SIM_RC_OK)
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{
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/* Uninstall the modules to avoid memory leaks,
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file descriptor leaks, etc. */
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sim_module_uninstall (sd);
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return 0;
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}
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/* check for/establish the a reference program image */
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if (sim_analyze_program (sd,
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(STATE_PROG_ARGV (sd) != NULL
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? *STATE_PROG_ARGV (sd)
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: NULL),
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abfd) != SIM_RC_OK)
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{
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sim_module_uninstall (sd);
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return 0;
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}
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/* establish any remaining configuration options */
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if (sim_config (sd) != SIM_RC_OK)
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{
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sim_module_uninstall (sd);
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return 0;
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}
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if (sim_post_argv_init (sd) != SIM_RC_OK)
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{
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/* Uninstall the modules to avoid memory leaks,
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file descriptor leaks, etc. */
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sim_module_uninstall (sd);
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return 0;
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}
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/* determine the machine type */
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if (STATE_ARCHITECTURE (sd) != NULL
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&& STATE_ARCHITECTURE (sd)->arch == bfd_arch_v850)
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mach = STATE_ARCHITECTURE (sd)->mach;
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else
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mach = bfd_mach_v850; /* default */
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/* set machine specific configuration */
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switch (mach)
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{
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case bfd_mach_v850:
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case bfd_mach_v850e:
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STATE_CPU (sd, 0)->psw_mask = (PSW_NP | PSW_EP | PSW_ID | PSW_SAT
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| PSW_CY | PSW_OV | PSW_S | PSW_Z);
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break;
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case bfd_mach_v850ea:
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PSW |= PSW_US;
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STATE_CPU (sd, 0)->psw_mask = (PSW_US
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| PSW_NP | PSW_EP | PSW_ID | PSW_SAT
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| PSW_CY | PSW_OV | PSW_S | PSW_Z);
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break;
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}
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return sd;
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}
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void
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sim_close (sd, quitting)
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SIM_DESC sd;
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int quitting;
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{
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sim_module_uninstall (sd);
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}
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SIM_RC
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sim_create_inferior (sd, prog_bfd, argv, env)
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SIM_DESC sd;
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struct _bfd *prog_bfd;
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char **argv;
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char **env;
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{
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memset (&State, 0, sizeof (State));
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if (prog_bfd != NULL)
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PC = bfd_get_start_address (prog_bfd);
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/* For v850ea, set PSW[US] by default */
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if (STATE_ARCHITECTURE (sd) != NULL
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&& STATE_ARCHITECTURE (sd)->arch == bfd_arch_v850
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&& STATE_ARCHITECTURE (sd)->mach == bfd_mach_v850ea)
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PSW |= PSW_US;
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return SIM_RC_OK;
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}
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int
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sim_fetch_register (sd, rn, memory, length)
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SIM_DESC sd;
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int rn;
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unsigned char *memory;
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int length;
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{
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*(unsigned32*)memory = H2T_4 (State.regs[rn]);
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return -1;
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}
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int
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sim_store_register (sd, rn, memory, length)
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SIM_DESC sd;
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int rn;
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unsigned char *memory;
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int length;
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{
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State.regs[rn] = T2H_4 (*(unsigned32*)memory);
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return -1;
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}
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void
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sim_do_command (sd, cmd)
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SIM_DESC sd;
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char *cmd;
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{
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char *mm_cmd = "memory-map";
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char *int_cmd = "interrupt";
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if (sim_args_command (sd, cmd) != SIM_RC_OK)
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{
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if (strncmp (cmd, mm_cmd, strlen (mm_cmd) == 0))
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sim_io_eprintf (sd, "`memory-map' command replaced by `sim memory'\n");
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else if (strncmp (cmd, int_cmd, strlen (int_cmd)) == 0)
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sim_io_eprintf (sd, "`interrupt' command replaced by `sim watch'\n");
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else
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sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);
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}
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}
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