/* dv-m68hc11.c -- CPU 68HC11&68HC12 as a device.
- Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
Written by Stephane Carrez (stcarrez@worldnet.fr)
(From a driver model Contributed by Cygnus Solutions.)
#include "sim-main.h"
+#include "sim-hw.h"
#include "hw-main.h"
+#include "sim-options.h"
+#include <limits.h>
/* DEVICE
Deliver a non-maskable interrupt to the processor.
+ set-port-a (input)
+ set-port-c (input)
+ set-pord-d (input)
+
+ Allow an external device to set the value of port A, C or D inputs.
+
+
cpu-reset (output)
Event generated after the CPU performs a reset.
+ port-a (output)
+ port-b (output)
+ port-c (output)
+ port-d (output)
+
+ Event generated when the value of the output port A, B, C or D
+ changes.
+
+
BUGS
When delivering an interrupt, this code assumes that there is only
*/
+enum
+{
+ OPTION_OSC_SET = OPTION_START,
+ OPTION_OSC_CLEAR,
+ OPTION_OSC_INFO
+};
+
+static DECLARE_OPTION_HANDLER (m68hc11_option_handler);
+
+static const OPTION m68hc11_options[] =
+{
+ { {"osc-set", required_argument, NULL, OPTION_OSC_SET },
+ '\0', "BIT,FREQ", "Set the oscillator on input port BIT",
+ m68hc11_option_handler },
+ { {"osc-clear", required_argument, NULL, OPTION_OSC_CLEAR },
+ '\0', "BIT", "Clear oscillator on input port BIT",
+ m68hc11_option_handler },
+ { {"osc-info", no_argument, NULL, OPTION_OSC_INFO },
+ '\0', NULL, "Print information about current input oscillators",
+ m68hc11_option_handler },
+
+ { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
+};
+struct input_osc
+{
+ signed64 on_time;
+ signed64 off_time;
+ signed64 repeat;
+ struct hw_event *event;
+ const char *name;
+ uint8 mask;
+ uint8 value;
+ uint16 addr;
+};
+#define NR_PORT_A_OSC (4)
+#define NR_PORT_B_OSC (0)
+#define NR_PORT_C_OSC (8)
+#define NR_PORT_D_OSC (6)
+#define NR_OSC (NR_PORT_A_OSC + NR_PORT_B_OSC + NR_PORT_C_OSC + NR_PORT_D_OSC)
struct m68hc11cpu {
/* Pending interrupts for delivery by event handler. */
int pending_reset;
unsigned_word attach_address;
int attach_size;
int attach_space;
+ int last_oscillator;
+ struct input_osc oscillators[NR_OSC];
};
RESET_PORT,
NMI_PORT,
IRQ_PORT,
- CPU_RESET_PORT
+ CPU_RESET_PORT,
+ SET_PORT_A,
+ SET_PORT_C,
+ SET_PORT_D,
+ PORT_A,
+ PORT_B,
+ PORT_C,
+ PORT_D,
+ CAPTURE
};
{ "nmi", NMI_PORT, 0, input_port, },
{ "irq", IRQ_PORT, 0, input_port, },
+ { "set-port-a", SET_PORT_A, 0, input_port, },
+ { "set-port-c", SET_PORT_C, 0, input_port, },
+ { "set-port-d", SET_PORT_D, 0, input_port, },
+
/* Events generated for connection to other devices. */
{ "cpu-reset", CPU_RESET_PORT, 0, output_port, },
+ /* Events generated when the corresponding port is
+ changed by the program. */
+ { "port-a", PORT_A, 0, output_port, },
+ { "port-b", PORT_B, 0, output_port, },
+ { "port-c", PORT_C, 0, output_port, },
+ { "port-d", PORT_D, 0, output_port, },
+
+ { "capture", CAPTURE, 0, output_port, },
+
{ NULL, },
};
static hw_port_event_method m68hc11cpu_port_event;
+static void make_oscillator (struct m68hc11cpu *controller,
+ const char *id, uint16 addr, uint8 mask);
+static struct input_osc *find_oscillator (struct m68hc11cpu *controller,
+ const char *id);
+static void reset_oscillators (struct hw *me);
static void
dv_m6811_attach_address_callback (struct hw *me,
controller = hw_data (me);
+ reset_oscillators (me);
hw_detach_address (me, M6811_IO_LEVEL,
controller->attach_space,
controller->attach_address,
cpu->cpu_mode = 0;
else
cpu->cpu_mode = M6811_MDA;
+
+ controller->last_oscillator = 0;
+
+ /* Create oscillators for input port A. */
+ make_oscillator (controller, "A7", M6811_PORTA, 0x80);
+ make_oscillator (controller, "A2", M6811_PORTA, 0x04);
+ make_oscillator (controller, "A1", M6811_PORTA, 0x02);
+ make_oscillator (controller, "A0", M6811_PORTA, 0x01);
+
+ /* port B is output only. */
+
+ /* Create oscillators for input port C. */
+ make_oscillator (controller, "C0", M6811_PORTC, 0x01);
+ make_oscillator (controller, "C1", M6811_PORTC, 0x02);
+ make_oscillator (controller, "C2", M6811_PORTC, 0x04);
+ make_oscillator (controller, "C3", M6811_PORTC, 0x08);
+ make_oscillator (controller, "C4", M6811_PORTC, 0x10);
+ make_oscillator (controller, "C5", M6811_PORTC, 0x20);
+ make_oscillator (controller, "C6", M6811_PORTC, 0x40);
+ make_oscillator (controller, "C7", M6811_PORTC, 0x80);
+
+ /* Create oscillators for input port D. */
+ make_oscillator (controller, "D0", M6811_PORTD, 0x01);
+ make_oscillator (controller, "D1", M6811_PORTD, 0x02);
+ make_oscillator (controller, "D2", M6811_PORTD, 0x04);
+ make_oscillator (controller, "D3", M6811_PORTD, 0x08);
+ make_oscillator (controller, "D4", M6811_PORTD, 0x10);
+ make_oscillator (controller, "D5", M6811_PORTD, 0x20);
+
+ /* Add oscillator commands. */
+ sim_add_option_table (sd, 0, m68hc11_options);
}
static void
{
}
+static void
+make_oscillator (struct m68hc11cpu *controller, const char *name,
+ uint16 addr, uint8 mask)
+{
+ struct input_osc *osc;
+
+ if (controller->last_oscillator >= NR_OSC)
+ hw_abort (0, "Too many oscillators");
+
+ osc = &controller->oscillators[controller->last_oscillator];
+ osc->name = name;
+ osc->addr = addr;
+ osc->mask = mask;
+ controller->last_oscillator++;
+}
+
+/* Find the oscillator given the input port name. */
+static struct input_osc *
+find_oscillator (struct m68hc11cpu *controller, const char *name)
+{
+ int i;
+
+ for (i = 0; i < controller->last_oscillator; i++)
+ if (strcasecmp (controller->oscillators[i].name, name) == 0)
+ return &controller->oscillators[i];
+
+ return 0;
+}
+static void
+oscillator_handler (struct hw *me, void *data)
+{
+ struct input_osc *osc = (struct input_osc*) data;
+ SIM_DESC sd;
+ sim_cpu *cpu;
+ signed64 dt;
+ uint8 val;
+
+ sd = hw_system (me);
+ cpu = STATE_CPU (sd, 0);
+
+ /* Change the input bit. */
+ osc->value ^= osc->mask;
+ val = cpu->ios[osc->addr] & ~osc->mask;
+ val |= osc->value;
+ m68hc11cpu_set_port (me, cpu, osc->addr, val);
+
+ /* Setup event to toggle the bit. */
+ if (osc->value)
+ dt = osc->on_time;
+ else
+ dt = osc->off_time;
+
+ if (dt && --osc->repeat >= 0)
+ {
+ sim_events *events = STATE_EVENTS (sd);
+
+ dt += events->nr_ticks_to_process;
+ osc->event = hw_event_queue_schedule (me, dt, oscillator_handler, osc);
+ }
+ else
+ osc->event = 0;
+}
+
+static void
+reset_oscillators (struct hw *me)
+{
+ struct m68hc11cpu *controller = hw_data (me);
+ int i;
+
+ for (i = 0; i < controller->last_oscillator; i++)
+ {
+ if (controller->oscillators[i].event)
+ {
+ hw_event_queue_deschedule (me, controller->oscillators[i].event);
+ controller->oscillators[i].event = 0;
+ }
+ }
+}
+
static void
m68hc11cpu_port_event (struct hw *me,
int my_port,
- Restart the cpu for the reset (get the CPU mode from the
CONFIG register that gets initialized by EEPROM device). */
cpu_reset (cpu);
+ reset_oscillators (me);
hw_port_event (me, CPU_RESET_PORT, 1);
cpu_restart (cpu);
break;
controller->pending_level = level;
HW_TRACE ((me, "port-in level=%d", level));
break;
+
+ case SET_PORT_A:
+ m68hc11cpu_set_port (me, cpu, M6811_PORTA, level);
+ break;
+ case SET_PORT_C:
+ m68hc11cpu_set_port (me, cpu, M6811_PORTC, level);
+ break;
+
+ case SET_PORT_D:
+ m68hc11cpu_set_port (me, cpu, M6811_PORTD, level);
+ break;
+
default:
hw_abort (me, "bad switch");
break;
return 0;
}
+/* Setup an oscillator on an input port.
+
+ TON represents the time in seconds that the input port should be set to 1.
+ TOFF is the time in seconds for the input port to be set to 0.
+
+ The oscillator frequency is therefore 1 / (ton + toff).
+
+ REPEAT indicates the number of 1 <-> 0 transitions until the oscillator
+ stops. */
+int
+m68hc11cpu_set_oscillator (SIM_DESC sd, const char *port,
+ double ton, double toff, signed64 repeat)
+{
+ sim_cpu *cpu;
+ struct input_osc *osc;
+ double f;
+
+ cpu = STATE_CPU (sd, 0);
+
+ /* Find oscillator that corresponds to the input port. */
+ osc = find_oscillator (hw_data (cpu->hw_cpu), port);
+ if (osc == 0)
+ return -1;
+
+ /* Compute the ON time in cpu cycles. */
+ f = (double) (cpu->cpu_frequency) * ton;
+ osc->on_time = (signed64) (f / 4.0);
+ if (osc->on_time < 1)
+ osc->on_time = 1;
+
+ /* Compute the OFF time in cpu cycles. */
+ f = (double) (cpu->cpu_frequency) * toff;
+ osc->off_time = (signed64) (f / 4.0);
+ if (osc->off_time < 1)
+ osc->off_time = 1;
+
+ osc->repeat = repeat;
+ if (osc->event)
+ hw_event_queue_deschedule (cpu->hw_cpu, osc->event);
+
+ osc->event = hw_event_queue_schedule (cpu->hw_cpu,
+ osc->value ? osc->on_time
+ : osc->off_time,
+ oscillator_handler, osc);
+ return 0;
+}
+
+/* Clear the oscillator. */
+int
+m68hc11cpu_clear_oscillator (SIM_DESC sd, const char *port)
+{
+ sim_cpu *cpu;
+ struct input_osc *osc;
+
+ cpu = STATE_CPU (sd, 0);
+ osc = find_oscillator (hw_data (cpu->hw_cpu), port);
+ if (osc == 0)
+ return -1;
+
+ if (osc->event)
+ hw_event_queue_deschedule (cpu->hw_cpu, osc->event);
+ osc->event = 0;
+ osc->repeat = 0;
+ return 0;
+}
+
+static int
+get_frequency (const char *s, double *f)
+{
+ char *p;
+
+ *f = strtod (s, &p);
+ if (s == p)
+ return -1;
+
+ if (*p)
+ {
+ if (strcasecmp (p, "khz") == 0)
+ *f = *f * 1000.0;
+ else if (strcasecmp (p, "mhz") == 0)
+ *f = *f * 1000000.0;
+ else if (strcasecmp (p, "hz") != 0)
+ return -1;
+ }
+ return 0;
+}
+
+static SIM_RC
+m68hc11_option_handler (SIM_DESC sd, sim_cpu *cpu,
+ int opt, char *arg, int is_command)
+{
+ struct m68hc11cpu *controller;
+ double f;
+ char *p;
+ int i;
+ int title_printed = 0;
+
+ if (cpu == 0)
+ cpu = STATE_CPU (sd, 0);
+
+ controller = hw_data (cpu->hw_cpu);
+ switch (opt)
+ {
+ case OPTION_OSC_SET:
+ p = strchr (arg, ',');
+ if (p)
+ *p++ = 0;
+
+ if (p == 0)
+ sim_io_eprintf (sd, "No frequency specified\n");
+ else if (get_frequency (p, &f) < 0 || f < 1.0e-8)
+ sim_io_eprintf (sd, "Invalid frequency: '%s'\n", p);
+ else if (m68hc11cpu_set_oscillator (sd, arg,
+ 1.0 / (f * 2.0),
+ 1.0 / (f * 2.0), LONG_MAX))
+ sim_io_eprintf (sd, "Invalid input port: '%s'\n", arg);
+ break;
+
+ case OPTION_OSC_CLEAR:
+ if (m68hc11cpu_clear_oscillator (sd, arg) != 0)
+ sim_io_eprintf (sd, "Invalid input port: '%s'\n", arg);
+ break;
+
+ case OPTION_OSC_INFO:
+ for (i = 0; i < controller->last_oscillator; i++)
+ {
+ signed64 t;
+ struct input_osc *osc;
+
+ osc = &controller->oscillators[i];
+ if (osc->event)
+ {
+ double f;
+ int cur_value;
+ int next_value;
+ char freq[32];
+
+ if (title_printed == 0)
+ {
+ title_printed = 1;
+ sim_io_printf (sd, " PORT Frequency Current"
+ " Next Transition time\n");
+ }
+
+ f = (double) (osc->on_time + osc->off_time);
+ f = (double) (cpu->cpu_frequency / 4) / f;
+ t = hw_event_remain_time (cpu->hw_cpu, osc->event);
+
+ if (f > 10000.0)
+ sprintf (freq, "%6.2f", f / 1000.0);
+ else
+ sprintf (freq, "%6.2f", f);
+ cur_value = osc->value ? 1 : 0;
+ next_value = osc->value ? 0 : 1;
+ if (f > 10000.0)
+ sim_io_printf (sd, " %4.4s %8.8s khz"
+ " %d %d %35.35s\n",
+ osc->name, freq,
+ cur_value, next_value,
+ cycle_to_string (cpu, t));
+ else
+ sim_io_printf (sd, " %4.4s %8.8s hz "
+ " %d %d %35.35s\n",
+ osc->name, freq,
+ cur_value, next_value,
+ cycle_to_string (cpu, t));
+ }
+ }
+ break;
+ }
+
+ return SIM_RC_OK;
+}
+
/* generic read/write */
static unsigned
HW_TRACE ((me, "read 0x%08lx %d", (long) base, (int) nr_bytes));
- sd = hw_system (me);
+ sd = hw_system (me);
cpu = STATE_CPU (sd, 0);
/* Handle reads for the sub-devices. */
return byte;
}
+void
+m68hc11cpu_set_port (struct hw *me, sim_cpu *cpu,
+ unsigned addr, uint8 val)
+{
+ uint8 mask;
+ uint8 delta;
+ int check_interrupts = 0;
+ int i;
+
+ switch (addr)
+ {
+ case M6811_PORTA:
+ if (cpu->ios[M6811_PACTL] & M6811_DDRA7)
+ mask = 3;
+ else
+ mask = 0x83;
+
+ val = val & mask;
+ val |= cpu->ios[M6811_PORTA] & ~mask;
+ delta = val ^ cpu->ios[M6811_PORTA];
+ cpu->ios[M6811_PORTA] = val;
+ if (delta & 0x80)
+ {
+ /* Pulse accumulator is enabled. */
+ if ((cpu->ios[M6811_PACTL] & M6811_PAEN)
+ && !(cpu->ios[M6811_PACTL] & M6811_PAMOD))
+ {
+ int inc;
+
+ /* Increment event counter according to rising/falling edge. */
+ if (cpu->ios[M6811_PACTL] & M6811_PEDGE)
+ inc = (val & 0x80) ? 1 : 0;
+ else
+ inc = (val & 0x80) ? 0 : 1;
+
+ cpu->ios[M6811_PACNT] += inc;
+
+ /* Event counter overflowed. */
+ if (inc && cpu->ios[M6811_PACNT] == 0)
+ {
+ cpu->ios[M6811_TFLG2] |= M6811_PAOVI;
+ check_interrupts = 1;
+ }
+ }
+ }
+
+ /* Scan IC3, IC2 and IC1. Bit number is 3 - i. */
+ for (i = 0; i < 3; i++)
+ {
+ uint8 mask = (1 << i);
+
+ if (delta & mask)
+ {
+ uint8 edge;
+ int captured;
+
+ edge = cpu->ios[M6811_TCTL2];
+ edge = (edge >> (2 * i)) & 0x3;
+ switch (edge)
+ {
+ case 0:
+ captured = 0;
+ break;
+ case 1:
+ captured = (val & mask) != 0;
+ break;
+ case 2:
+ captured = (val & mask) == 0;
+ break;
+ default:
+ captured = 1;
+ break;
+ }
+ if (captured)
+ {
+ cpu->ios[M6811_TFLG1] |= (1 << i);
+ hw_port_event (me, CAPTURE, M6811_TIC1 + 3 - i);
+ check_interrupts = 1;
+ }
+ }
+ }
+ break;
+
+ case M6811_PORTC:
+ mask = cpu->ios[M6811_DDRC];
+ val = val & mask;
+ val |= cpu->ios[M6811_PORTC] & ~mask;
+ cpu->ios[M6811_PORTC] = val;
+ break;
+
+ case M6811_PORTD:
+ mask = cpu->ios[M6811_DDRD];
+ val = val & mask;
+ val |= cpu->ios[M6811_PORTD] & ~mask;
+ cpu->ios[M6811_PORTD] = val;
+ break;
+
+ default:
+ break;
+ }
+
+ if (check_interrupts)
+ interrupts_update_pending (&cpu->cpu_interrupts);
+}
static void
m68hc11cpu_io_write (struct hw *me, sim_cpu *cpu,
switch (addr)
{
case M6811_PORTA:
+ hw_port_event (me, PORT_A, val);
break;
case M6811_PIOC:
break;
case M6811_PORTC:
+ hw_port_event (me, PORT_C, val);
break;
case M6811_PORTB:
+ hw_port_event (me, PORT_B, val);
break;
case M6811_PORTCL:
break;
case M6811_PORTD:
+ hw_port_event (me, PORT_D, val);
break;
case M6811_DDRD:
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