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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#endif
#include "device_table.h"
-#include "cpu.h"
-
-#include <stdio.h>
-#include <fcntl.h>
-
-#if 0
-#ifdef HAVE_TIME_H
-#include <time.h>
-#endif
-#endif
+#include "cpu.h"
#ifdef HAVE_STRING_H
#include <string.h>
#endif
-/* Device:
-
- pal@<address>
+/* DEVICE
+
+ pal - glue logic device containing assorted junk
+
- Description:
+ DESCRIPTION
+
Typical hardware dependant hack. This device allows the firmware
to gain access to all the things the firmware needs (but the OS
- doesn't). All registers are little endian (byte 0 is the least
- significant) and must be accessed correctly aligned.
-
- <address> + 0: write - halts simulation with exit code byte[0].
-
- <address> + 4: read - processor nr in byte[0].
-
- <address> + 8: write - send interrupt message to port byte[0] with
- value byte[1].
+ doesn't).
+
+ The pal contains the following registers. Except for the interrupt
+ level register, each of the below is 8 bytes in size and must be
+ accessed using correct alignment. For 16 and 32 bit accesses the
+ bytes not directed to the register are ignored:
- <address> + 12: read - nr processors in byte[0].
+ |0 reset register (write)
+ |4 processor id register (read)
+ |8 interrupt port (write)
+ |9 interrupt level (write)
+ |12 processor count register (read)
+ |16 tty input fifo register (read)
+ |20 tty input status register (read)
+ |24 tty output fifo register (write)
+ |28 tty output status register (read)
+
+ Reset register (write) halts the simulator exiting with the
+ value written.
+ Processor id register (read) returns the processor number (0
+ .. N-1) of the processor performing the read.
- Properties:
+ The interrupt registers should be accessed as a pair (using a 16 or
+ 32 bit store). The low byte specifies the interrupt port while the
+ high byte specifies the level to drive that port at. By
+ convention, the pal's interrupt ports (int0, int1, ...) are wired
+ up to the corresponding processor's level sensative external
+ interrupt pin. Eg: A two byte write to address 8 of 0x0102
+ (big-endian) will result in processor 2's external interrupt pin to
+ be asserted.
+
+ Processor count register (read) returns the total number of
+ processors active in the current simulation.
+
+ TTY input fifo register (read), if the TTY input status register
+ indicates a character is available by being nonzero, returns the
+ next available character from the pal's tty input port.
+
+ Similarly, the TTY output fifo register (write), if the TTY output
+ status register indicates the output fifo is not full by being
+ nonzero, outputs the character written to the tty's output port.
+
+
+ PROPERTIES
- NONE. */
+
+ reg = <address> <size> (required)
+
+ Specify the address (within the parent bus) that this device is to
+ live.
+
+
+ */
enum {
typedef struct _hw_pal_device {
hw_pal_console_buffer input;
hw_pal_console_buffer output;
+ device *disk;
} hw_pal_device;
static void
scan_hw_pal(hw_pal_device *hw_pal)
{
- if (WITH_STDIO == DO_USE_STDIO) {
- int c = getchar ();
- if (c == EOF) {
- hw_pal->input.buffer = 0;
- hw_pal->input.status = 0;
- } else {
- hw_pal->input.buffer = c;
- hw_pal->input.status = 1;
- }
-
- } else {
- /* check for input */
- int flags;
- int status;
- /* get the old status */
- flags = fcntl(0, F_GETFL, 0);
- if (flags == -1) {
- perror("hw_pal");
- return;
- }
- /* temp, disable blocking IO */
- status = fcntl(0, F_SETFL, flags | O_NDELAY);
- if (status == -1) {
- perror("hw_pal");
- return;
- }
- /* try for input */
- status = read(0, &hw_pal->input.buffer, 1);
- if (status == 1) {
- hw_pal->input.status = 1;
- }
- else {
- hw_pal->input.status = 0;
- }
- /* return to regular vewing */
- flags = fcntl(0, F_SETFL, flags);
- if (flags == -1) {
- perror("hw_pal");
- return;
- }
+ char c;
+ int count;
+ count = sim_io_read_stdin(&c, sizeof(c));
+ switch (count) {
+ case sim_io_not_ready:
+ case sim_io_eof:
+ hw_pal->input.buffer = 0;
+ hw_pal->input.status = 0;
+ break;
+ default:
+ hw_pal->input.buffer = c;
+ hw_pal->input.status = 1;
}
}
write_hw_pal(hw_pal_device *hw_pal,
char val)
{
- if (WITH_STDIO == DO_USE_STDIO) {
- putchar (val);
-
- } else {
- printf_filtered("%c", val) ;
- }
-
+ sim_io_write_stdout(&val, 1);
hw_pal->output.buffer = val;
hw_pal->output.status = 1;
}
switch (addr & hw_pal_address_mask) {
case hw_pal_cpu_nr_register:
val = cpu_nr(processor);
+ DTRACE(pal, ("read - cpu-nr %d\n", val));
break;
case hw_pal_nr_cpu_register:
- val = device_find_integer_property(me, "/openprom/options/smp");
+ val = tree_find_integer_property(me, "/openprom/options/smp");
+ DTRACE(pal, ("read - nr-cpu %d\n", val));
break;
case hw_pal_read_fifo:
val = hw_pal->input.buffer;
+ DTRACE(pal, ("read - input-fifo %d\n", val));
break;
case hw_pal_read_status:
scan_hw_pal(hw_pal);
val = hw_pal->input.status;
+ DTRACE(pal, ("read - input-status %d\n", val));
break;
case hw_pal_write_fifo:
val = hw_pal->output.buffer;
+ DTRACE(pal, ("read - output-fifo %d\n", val));
break;
case hw_pal_write_status:
val = hw_pal->output.status;
+ DTRACE(pal, ("read - output-status %d\n", val));
break;
default:
val = 0;
+ DTRACE(pal, ("read - ???\n"));
}
memset(dest, 0, nr_bytes);
*(unsigned_1*)dest = val;
break;
case hw_pal_read_fifo:
hw_pal->input.buffer = byte[0];
+ DTRACE(pal, ("write - input-fifo %d\n", byte[0]));
break;
case hw_pal_read_status:
hw_pal->input.status = byte[0];
+ DTRACE(pal, ("write - input-status %d\n", byte[0]));
break;
case hw_pal_write_fifo:
write_hw_pal(hw_pal, byte[0]);
+ DTRACE(pal, ("write - output-fifo %d\n", byte[0]));
break;
case hw_pal_write_status:
hw_pal->output.status = byte[0];
+ DTRACE(pal, ("write - output-status %d\n", byte[0]));
break;
}
return nr_bytes;
/* instances of the hw_pal device */
-static void *
-hw_pal_instance_create_callback(device *me,
- const char *args)
-{
- /* make life easier, attach the hw_pal data to the instance */
- return device_data(me);
-}
static void
hw_pal_instance_delete_callback(device_instance *instance)
void *buf,
unsigned_word len)
{
- char *buf_char = (char *)buf;
- hw_pal_device *hw_pal = device_instance_data(instance);
- if (WITH_STDIO == DO_USE_STDIO) {
- char *line = fgets (buf_char, len, stdin);
- return ((!line) ? -1 : strlen (buf_char));
-
- } else {
- return read(0, buf_char, len);
- }
+ DITRACE(pal, ("read - %s (%ld)", (const char*)buf, (long int)len));
+ return sim_io_read_stdin(buf, len);
}
static int
int i;
const char *chp = buf;
hw_pal_device *hw_pal = device_instance_data(instance);
+ DITRACE(pal, ("write - %s (%ld)", (const char*)buf, (long int)len));
for (i = 0; i < len; i++)
write_hw_pal(hw_pal, chp[i]);
-
- if (WITH_STDIO == DO_USE_STDIO) {
- fflush (stdout);
- }
+ sim_io_flush_stdoutput();
return i;
}
+static const device_instance_callbacks hw_pal_instance_callbacks = {
+ hw_pal_instance_delete_callback,
+ hw_pal_instance_read_callback,
+ hw_pal_instance_write_callback,
+};
+
+static device_instance *
+hw_pal_create_instance(device *me,
+ const char *path,
+ const char *args)
+{
+ return device_create_instance_from(me, NULL,
+ device_data(me),
+ path, args,
+ &hw_pal_instance_callbacks);
+}
+
+static const device_interrupt_port_descriptor hw_pal_interrupt_ports[] = {
+ { "int", 0, MAX_NR_PROCESSORS },
+ { NULL }
+};
+
+
+static void
+hw_pal_attach_address(device *me,
+ attach_type attach,
+ int space,
+ unsigned_word addr,
+ unsigned nr_bytes,
+ access_type access,
+ device *client)
+{
+ hw_pal_device *pal = (hw_pal_device*)device_data(me);
+ pal->disk = client;
+}
+
+
static device_callbacks const hw_pal_callbacks = {
{ generic_device_init_address, },
- { NULL, }, /* address */
+ { hw_pal_attach_address, }, /* address */
{ hw_pal_io_read_buffer_callback,
hw_pal_io_write_buffer_callback, },
{ NULL, }, /* DMA */
- { NULL, }, /* interrupt */
- { NULL, }, /* unit */
- { hw_pal_instance_create_callback,
- hw_pal_instance_delete_callback,
- hw_pal_instance_read_callback,
- hw_pal_instance_write_callback, },
+ { NULL, NULL, hw_pal_interrupt_ports }, /* interrupt */
+ { generic_device_unit_decode,
+ generic_device_unit_encode,
+ generic_device_address_to_attach_address,
+ generic_device_size_to_attach_size },
+ hw_pal_create_instance,
};
static void *
hw_pal_create(const char *name,
const device_unit *unit_address,
- const char *args,
- device *parent)
+ const char *args)
{
/* create the descriptor */
hw_pal_device *hw_pal = ZALLOC(hw_pal_device);
projects / deliverable / binutils-gdb.git / blobdiff