/* This file is part of the program psim.
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/* This file is part of the program psim.
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Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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*/
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#ifndef _HW_GLUE_C_
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#ifndef _HW_GLUE_C_
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#define _HW_GLUE_C_
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#define _HW_GLUE_C_
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#include "device_table.h"
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#include "device_table.h"
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/* DEVICE
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/* DEVICE
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glue - glue to interconnect and test interrupts
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glue - glue to interconnect and test interrupts
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DESCRIPTION
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DESCRIPTION
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The glue device provides two functions. Firstly, it provides a
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The glue device provides two functions. Firstly, it provides a
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mechanism for inspecting and driving the interrupt net. Secondly,
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mechanism for inspecting and driving the interrupt net. Secondly,
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it provides a set of boolean primitives that can be used add
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it provides a set of boolean primitives that can be used add
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combinatorial operations to the interrupt network.
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combinatorial operations to the interrupt network.
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|
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Glue devices have a variable number of big endian <<output>>
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Glue devices have a variable number of big endian <<output>>
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registers. Each host-word size. The registers can be both read
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registers. Each host-word size. The registers can be both read
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and written.
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and written.
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Writing a value to an output register causes an interrupt (of the
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Writing a value to an output register causes an interrupt (of the
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specified level) to be driven on the devices corresponding output
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specified level) to be driven on the devices corresponding output
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interrupt port.
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interrupt port.
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Reading an <<output>> register returns either the last value
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Reading an <<output>> register returns either the last value
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written or the most recently computed value (for that register) as
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written or the most recently computed value (for that register) as
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a result of an interrupt ariving (which ever was computed last).
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a result of an interrupt ariving (which ever was computed last).
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At present the following sub device types are available:
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At present the following sub device types are available:
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<<glue>>: In addition to driving its output interrupt port with any
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<<glue>>: In addition to driving its output interrupt port with any
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value written to an interrupt input port is stored in the
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value written to an interrupt input port is stored in the
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corresponding <<output>> register. Such input interrupts, however,
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corresponding <<output>> register. Such input interrupts, however,
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are not propogated to an output interrupt port.
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are not propogated to an output interrupt port.
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<<glue-and>>: The bit-wise AND of the interrupt inputs is computed
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<<glue-and>>: The bit-wise AND of the interrupt inputs is computed
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and then both stored in <<output>> register zero and propogated to
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and then both stored in <<output>> register zero and propogated to
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output interrupt output port zero.
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output interrupt output port zero.
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PROPERTIES
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PROPERTIES
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reg = <address> <size> (required)
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reg = <address> <size> (required)
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Specify the address (within the parent bus) that this device is to
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Specify the address (within the parent bus) that this device is to
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live. The address must be 2048 * sizeof(word) (8k in a 32bit
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live. The address must be 2048 * sizeof(word) (8k in a 32bit
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simulation) aligned.
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simulation) aligned.
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interrupt-ranges = <int-number> <range> (optional)
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interrupt-ranges = <int-number> <range> (optional)
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If present, this specifies the number of valid interrupt inputs (up
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If present, this specifies the number of valid interrupt inputs (up
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to the maximum of 2048). By default, <<int-number>> is zero and
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to the maximum of 2048). By default, <<int-number>> is zero and
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range is determined by the <<reg>> size.
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range is determined by the <<reg>> size.
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EXAMPLES
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EXAMPLES
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Enable tracing of the device:
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Enable tracing of the device:
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| -t glue-device \
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| -t glue-device \
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Create source, bitwize-and, and sink glue devices. Since the
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Create source, bitwize-and, and sink glue devices. Since the
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device at address <<0x10000>> is of size <<8>> it will have two
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device at address <<0x10000>> is of size <<8>> it will have two
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output interrupt ports.
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output interrupt ports.
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| -o '/iobus@0xf0000000/glue@0x10000/reg 0x10000 8' \
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| -o '/iobus@0xf0000000/glue@0x10000/reg 0x10000 8' \
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| -o '/iobus@0xf0000000/glue-and@0x20000/reg 0x20000 4' \
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| -o '/iobus@0xf0000000/glue-and@0x20000/reg 0x20000 4' \
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| -o '/iobus@0xf0000000/glue-and/interrupt-ranges 0 2' \
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| -o '/iobus@0xf0000000/glue-and/interrupt-ranges 0 2' \
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| -o '/iobus@0xf0000000/glue@0x30000/reg 0x30000 4' \
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| -o '/iobus@0xf0000000/glue@0x30000/reg 0x30000 4' \
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Wire the two source interrupts to the AND device:
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Wire the two source interrupts to the AND device:
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| -o '/iobus@0xf0000000/glue@0x10000 > 0 0 /iobus/glue-and' \
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| -o '/iobus@0xf0000000/glue@0x10000 > 0 0 /iobus/glue-and' \
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| -o '/iobus@0xf0000000/glue@0x10000 > 1 1 /iobus/glue-and' \
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| -o '/iobus@0xf0000000/glue@0x10000 > 1 1 /iobus/glue-and' \
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Wire the AND device up to the sink so that the and's output is not
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Wire the AND device up to the sink so that the and's output is not
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left open.
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left open.
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| -o '/iobus@0xf0000000/glue-and > 0 0 /iobus/glue@0x30000' \
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| -o '/iobus@0xf0000000/glue-and > 0 0 /iobus/glue@0x30000' \
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With the above configuration. The client program is able to
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With the above configuration. The client program is able to
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compute a two bit AND. For instance the <<C>> stub below prints 1
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compute a two bit AND. For instance the <<C>> stub below prints 1
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AND 0.
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AND 0.
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| unsigned *input = (void*)0xf0010000;
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| unsigned *input = (void*)0xf0010000;
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| unsigned *output = (void*)0xf0030000;
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| unsigned *output = (void*)0xf0030000;
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| unsigned ans;
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| unsigned ans;
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| input[0] = htonl(1);
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| input[0] = htonl(1);
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| input[1] = htonl(0);
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| input[1] = htonl(0);
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| ans = ntohl(*output);
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| ans = ntohl(*output);
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| write_string("AND is ");
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| write_string("AND is ");
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| write_int(ans);
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| write_int(ans);
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| write_line();
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| write_line();
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BUGS
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BUGS
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A future implementation of this device may support multiple
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A future implementation of this device may support multiple
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interrupt ranges.
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interrupt ranges.
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Some of the devices listed may not yet be fully implemented.
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Some of the devices listed may not yet be fully implemented.
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Additional devices such as a dff, an inverter or a latch may be
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Additional devices such as a dff, an inverter or a latch may be
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useful.
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useful.
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*/
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*/
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enum {
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enum {
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max_nr_interrupts = 2048,
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max_nr_interrupts = 2048,
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};
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};
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typedef enum _hw_glue_type {
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typedef enum _hw_glue_type {
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glue_undefined = 0,
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glue_undefined = 0,
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glue_io,
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glue_io,
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glue_and,
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glue_and,
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glue_nand,
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glue_nand,
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glue_or,
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glue_or,
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glue_xor,
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glue_xor,
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glue_nor,
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glue_nor,
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glue_not,
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glue_not,
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} hw_glue_type;
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} hw_glue_type;
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typedef struct _hw_glue_device {
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typedef struct _hw_glue_device {
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hw_glue_type type;
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hw_glue_type type;
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int int_number;
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int int_number;
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int *input;
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int *input;
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int nr_inputs;
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int nr_inputs;
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unsigned sizeof_input;
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unsigned sizeof_input;
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/* our output registers */
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/* our output registers */
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int space;
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int space;
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unsigned_word address;
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unsigned_word address;
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unsigned sizeof_output;
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unsigned sizeof_output;
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int *output;
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int *output;
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int nr_outputs;
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int nr_outputs;
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} hw_glue_device;
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} hw_glue_device;
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static void
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static void
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hw_glue_init_address(device *me)
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hw_glue_init_address(device *me)
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{
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{
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hw_glue_device *glue = (hw_glue_device*)device_data(me);
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hw_glue_device *glue = (hw_glue_device*)device_data(me);
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/* attach to my parent */
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/* attach to my parent */
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generic_device_init_address(me);
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generic_device_init_address(me);
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/* establish the output registers */
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/* establish the output registers */
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if (glue->output != NULL) {
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if (glue->output != NULL) {
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memset(glue->output, 0, glue->sizeof_output);
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memset(glue->output, 0, glue->sizeof_output);
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}
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}
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else {
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else {
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reg_property_spec unit;
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reg_property_spec unit;
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int reg_nr;
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int reg_nr;
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/* find a relevant reg entry */
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/* find a relevant reg entry */
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reg_nr = 0;
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reg_nr = 0;
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while (device_find_reg_array_property(me, "reg", reg_nr, &unit)
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while (device_find_reg_array_property(me, "reg", reg_nr, &unit)
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&& !device_size_to_attach_size(device_parent(me), &unit.size,
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&& !device_size_to_attach_size(device_parent(me), &unit.size,
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&glue->sizeof_output, me))
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&glue->sizeof_output, me))
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reg_nr++;
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reg_nr++;
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/* check out the size */
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/* check out the size */
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if (glue->sizeof_output == 0)
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if (glue->sizeof_output == 0)
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device_error(me, "at least one reg property size must be nonzero");
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device_error(me, "at least one reg property size must be nonzero");
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if (glue->sizeof_output % sizeof(unsigned_word) != 0)
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if (glue->sizeof_output % sizeof(unsigned_word) != 0)
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device_error(me, "reg property size must be %d aligned", sizeof(unsigned_word));
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device_error(me, "reg property size must be %d aligned", sizeof(unsigned_word));
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/* and the address */
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/* and the address */
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device_address_to_attach_address(device_parent(me),
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device_address_to_attach_address(device_parent(me),
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&unit.address, &glue->space, &glue->address,
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&unit.address, &glue->space, &glue->address,
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me);
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me);
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if (glue->address % (sizeof(unsigned_word) * max_nr_interrupts) != 0)
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if (glue->address % (sizeof(unsigned_word) * max_nr_interrupts) != 0)
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device_error(me, "reg property address must be %d aligned",
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device_error(me, "reg property address must be %d aligned",
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sizeof(unsigned_word) * max_nr_interrupts);
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sizeof(unsigned_word) * max_nr_interrupts);
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glue->nr_outputs = glue->sizeof_output / sizeof(unsigned_word);
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glue->nr_outputs = glue->sizeof_output / sizeof(unsigned_word);
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glue->output = zalloc(glue->sizeof_output);
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glue->output = zalloc(glue->sizeof_output);
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}
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}
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/* establish the input interrupt ports */
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/* establish the input interrupt ports */
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if (glue->input != NULL) {
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if (glue->input != NULL) {
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memset(glue->input, 0, glue->sizeof_input);
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memset(glue->input, 0, glue->sizeof_input);
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}
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}
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else {
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else {
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const device_property *ranges = device_find_property(me, "interrupt-ranges");
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const device_property *ranges = device_find_property(me, "interrupt-ranges");
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if (ranges == NULL) {
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if (ranges == NULL) {
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glue->int_number = 0;
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glue->int_number = 0;
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glue->nr_inputs = glue->nr_outputs;
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glue->nr_inputs = glue->nr_outputs;
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}
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}
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else if (ranges->sizeof_array != sizeof(unsigned_cell) * 2) {
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else if (ranges->sizeof_array != sizeof(unsigned_cell) * 2) {
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device_error(me, "invalid interrupt-ranges property (incorrect size)");
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device_error(me, "invalid interrupt-ranges property (incorrect size)");
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}
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}
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else {
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else {
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const unsigned_cell *int_range = ranges->array;
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const unsigned_cell *int_range = ranges->array;
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glue->int_number = BE2H_cell(int_range[0]);
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glue->int_number = BE2H_cell(int_range[0]);
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glue->nr_inputs = BE2H_cell(int_range[1]);
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glue->nr_inputs = BE2H_cell(int_range[1]);
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}
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}
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glue->sizeof_input = glue->nr_inputs * sizeof(unsigned);
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glue->sizeof_input = glue->nr_inputs * sizeof(unsigned);
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glue->input = zalloc(glue->sizeof_input);
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glue->input = zalloc(glue->sizeof_input);
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}
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}
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/* determine our type */
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/* determine our type */
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if (glue->type == glue_undefined) {
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if (glue->type == glue_undefined) {
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const char *name = device_name(me);
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const char *name = device_name(me);
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if (strcmp(name, "glue") == 0)
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if (strcmp(name, "glue") == 0)
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glue->type = glue_io;
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glue->type = glue_io;
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else if (strcmp(name, "glue-and") == 0)
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else if (strcmp(name, "glue-and") == 0)
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glue->type = glue_and;
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glue->type = glue_and;
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else
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else
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device_error(me, "unimplemented glue type");
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device_error(me, "unimplemented glue type");
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}
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}
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|
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DTRACE(glue, ("int-number %d, nr_inputs %d, nr_outputs %d\n",
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DTRACE(glue, ("int-number %d, nr_inputs %d, nr_outputs %d\n",
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glue->int_number, glue->nr_inputs, glue->nr_outputs));
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glue->int_number, glue->nr_inputs, glue->nr_outputs));
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}
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}
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static unsigned
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static unsigned
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hw_glue_io_read_buffer_callback(device *me,
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hw_glue_io_read_buffer_callback(device *me,
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void *dest,
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void *dest,
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int space,
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int space,
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unsigned_word addr,
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unsigned_word addr,
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unsigned nr_bytes,
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unsigned nr_bytes,
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cpu *processor,
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cpu *processor,
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unsigned_word cia)
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unsigned_word cia)
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{
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{
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hw_glue_device *glue = (hw_glue_device*)device_data(me);
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hw_glue_device *glue = (hw_glue_device*)device_data(me);
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int reg = ((addr - glue->address) / sizeof(unsigned_word)) % glue->nr_outputs;
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int reg = ((addr - glue->address) / sizeof(unsigned_word)) % glue->nr_outputs;
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if (nr_bytes != sizeof(unsigned_word)
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if (nr_bytes != sizeof(unsigned_word)
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|| (addr % sizeof(unsigned_word)) != 0)
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|| (addr % sizeof(unsigned_word)) != 0)
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device_error(me, "missaligned read access (%d:0x%lx:%d) not supported",
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device_error(me, "missaligned read access (%d:0x%lx:%d) not supported",
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space, (unsigned long)addr, nr_bytes);
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space, (unsigned long)addr, nr_bytes);
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*(unsigned_word*)dest = H2BE_4(glue->output[reg]);
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*(unsigned_word*)dest = H2BE_4(glue->output[reg]);
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DTRACE(glue, ("read - interrupt %d (0x%lx), level %d\n",
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DTRACE(glue, ("read - interrupt %d (0x%lx), level %d\n",
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reg, (unsigned long) addr, glue->output[reg]));
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reg, (unsigned long) addr, glue->output[reg]));
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return nr_bytes;
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return nr_bytes;
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}
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}
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|
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static unsigned
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static unsigned
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hw_glue_io_write_buffer_callback(device *me,
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hw_glue_io_write_buffer_callback(device *me,
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const void *source,
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const void *source,
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int space,
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int space,
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unsigned_word addr,
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unsigned_word addr,
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unsigned nr_bytes,
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unsigned nr_bytes,
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cpu *processor,
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cpu *processor,
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unsigned_word cia)
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unsigned_word cia)
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{
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{
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hw_glue_device *glue = (hw_glue_device*)device_data(me);
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hw_glue_device *glue = (hw_glue_device*)device_data(me);
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int reg = ((addr - glue->address) / sizeof(unsigned_word)) % max_nr_interrupts;
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int reg = ((addr - glue->address) / sizeof(unsigned_word)) % max_nr_interrupts;
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if (nr_bytes != sizeof(unsigned_word)
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if (nr_bytes != sizeof(unsigned_word)
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|| (addr % sizeof(unsigned_word)) != 0)
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|| (addr % sizeof(unsigned_word)) != 0)
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device_error(me, "missaligned write access (%d:0x%lx:%d) not supported",
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device_error(me, "missaligned write access (%d:0x%lx:%d) not supported",
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space, (unsigned long)addr, nr_bytes);
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space, (unsigned long)addr, nr_bytes);
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glue->output[reg] = H2BE_4(*(unsigned_word*)source);
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glue->output[reg] = H2BE_4(*(unsigned_word*)source);
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DTRACE(glue, ("write - interrupt %d (0x%lx), level %d\n",
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DTRACE(glue, ("write - interrupt %d (0x%lx), level %d\n",
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reg, (unsigned long) addr, glue->output[reg]));
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reg, (unsigned long) addr, glue->output[reg]));
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device_interrupt_event(me, reg, glue->output[reg], processor, cia);
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device_interrupt_event(me, reg, glue->output[reg], processor, cia);
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return nr_bytes;
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return nr_bytes;
|
}
|
}
|
|
|
static void
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static void
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hw_glue_interrupt_event(device *me,
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hw_glue_interrupt_event(device *me,
|
int my_port,
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int my_port,
|
device *source,
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device *source,
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int source_port,
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int source_port,
|
int level,
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int level,
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cpu *processor,
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cpu *processor,
|
unsigned_word cia)
|
unsigned_word cia)
|
{
|
{
|
hw_glue_device *glue = (hw_glue_device*)device_data(me);
|
hw_glue_device *glue = (hw_glue_device*)device_data(me);
|
int i;
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int i;
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if (my_port < glue->int_number
|
if (my_port < glue->int_number
|
|| my_port >= glue->int_number + glue->nr_inputs)
|
|| my_port >= glue->int_number + glue->nr_inputs)
|
device_error(me, "interrupt %d outside of valid range", my_port);
|
device_error(me, "interrupt %d outside of valid range", my_port);
|
glue->input[my_port - glue->int_number] = level;
|
glue->input[my_port - glue->int_number] = level;
|
switch (glue->type) {
|
switch (glue->type) {
|
case glue_io:
|
case glue_io:
|
{
|
{
|
int port = my_port % glue->nr_outputs;
|
int port = my_port % glue->nr_outputs;
|
glue->output[port] = level;
|
glue->output[port] = level;
|
DTRACE(glue, ("input - interrupt %d (0x%lx), level %d\n",
|
DTRACE(glue, ("input - interrupt %d (0x%lx), level %d\n",
|
my_port,
|
my_port,
|
(unsigned long)glue->address + port * sizeof(unsigned_word),
|
(unsigned long)glue->address + port * sizeof(unsigned_word),
|
level));
|
level));
|
break;
|
break;
|
}
|
}
|
case glue_and:
|
case glue_and:
|
glue->output[0] = glue->input[0];
|
glue->output[0] = glue->input[0];
|
for (i = 1; i < glue->nr_inputs; i++)
|
for (i = 1; i < glue->nr_inputs; i++)
|
glue->output[0] &= glue->input[i];
|
glue->output[0] &= glue->input[i];
|
DTRACE(glue, ("and - interrupt %d, level %d arrived - output %d\n",
|
DTRACE(glue, ("and - interrupt %d, level %d arrived - output %d\n",
|
my_port, level, glue->output[0]));
|
my_port, level, glue->output[0]));
|
device_interrupt_event(me, 0, glue->output[0], processor, cia);
|
device_interrupt_event(me, 0, glue->output[0], processor, cia);
|
break;
|
break;
|
default:
|
default:
|
device_error(me, "operator not implemented");
|
device_error(me, "operator not implemented");
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
|
|
static const device_interrupt_port_descriptor hw_glue_interrupt_ports[] = {
|
static const device_interrupt_port_descriptor hw_glue_interrupt_ports[] = {
|
{ "int", 0, max_nr_interrupts },
|
{ "int", 0, max_nr_interrupts },
|
{ NULL }
|
{ NULL }
|
};
|
};
|
|
|
|
|
static device_callbacks const hw_glue_callbacks = {
|
static device_callbacks const hw_glue_callbacks = {
|
{ hw_glue_init_address, NULL },
|
{ hw_glue_init_address, NULL },
|
{ NULL, }, /* address */
|
{ NULL, }, /* address */
|
{ hw_glue_io_read_buffer_callback,
|
{ hw_glue_io_read_buffer_callback,
|
hw_glue_io_write_buffer_callback, },
|
hw_glue_io_write_buffer_callback, },
|
{ NULL, }, /* DMA */
|
{ NULL, }, /* DMA */
|
{ hw_glue_interrupt_event, NULL, hw_glue_interrupt_ports }, /* interrupt */
|
{ hw_glue_interrupt_event, NULL, hw_glue_interrupt_ports }, /* interrupt */
|
{ NULL, }, /* unit */
|
{ NULL, }, /* unit */
|
NULL, /* instance */
|
NULL, /* instance */
|
};
|
};
|
|
|
|
|
static void *
|
static void *
|
hw_glue_create(const char *name,
|
hw_glue_create(const char *name,
|
const device_unit *unit_address,
|
const device_unit *unit_address,
|
const char *args)
|
const char *args)
|
{
|
{
|
/* create the descriptor */
|
/* create the descriptor */
|
hw_glue_device *glue = ZALLOC(hw_glue_device);
|
hw_glue_device *glue = ZALLOC(hw_glue_device);
|
return glue;
|
return glue;
|
}
|
}
|
|
|
|
|
const device_descriptor hw_glue_device_descriptor[] = {
|
const device_descriptor hw_glue_device_descriptor[] = {
|
{ "glue", hw_glue_create, &hw_glue_callbacks },
|
{ "glue", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-and", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-and", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-nand", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-nand", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-or", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-or", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-xor", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-xor", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-nor", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-nor", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-not", hw_glue_create, &hw_glue_callbacks },
|
{ "glue-not", hw_glue_create, &hw_glue_callbacks },
|
{ NULL },
|
{ NULL },
|
};
|
};
|
|
|
#endif /* _HW_GLUE_C_ */
|
#endif /* _HW_GLUE_C_ */
|
|
|
