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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [sim/] [common/] [hw-ports.h] - Rev 411
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/* Hardware ports. Copyright (C) 1998, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. Contributed by Andrew Cagney and Cygnus Solutions. This file is part of GDB, the GNU debugger. 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 3 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, see <http://www.gnu.org/licenses/>. */ #ifndef HW_PORTS_H #define HW_PORTS_H /* Initialize a port */ struct hw_port_descriptor { const char *name; int number; int nr_ports; port_direction direction; }; void set_hw_ports (struct hw *hw, const struct hw_port_descriptor ports[]); typedef void (hw_port_event_method) (struct hw *me, int my_port, struct hw *source, int source_port, int level); void set_hw_port_event (struct hw *hw, hw_port_event_method *to_port_event); /* Port source A device drives its output ports using the call */ void hw_port_event (struct hw *me, int my_port, int value); /* This port event will then be propogated to any attached destination ports. Any interpretation of PORT and VALUE is model dependant. As a guideline the following are recommended: PCI interrupts A-D should correspond to ports 0-3; level sensative interrupts be requested with a value of one and withdrawn with a value of 0; edge sensative interrupts always have a value of 1, the event its self is treated as the interrupt. Port destinations Attached to each port of a device can be zero or more desitinations. These destinations consist of a device/port pair. A destination is attached/detached to a device line using the attach and detach calls. */ void hw_port_attach (struct hw *me, int my_port, struct hw *dest, int dest_port, object_disposition disposition); void hw_port_detach (struct hw *me, int my_port, struct hw *dest, int dest_port); /* Iterate over the list of ports attached to a device */ typedef void (hw_port_traverse_function) (struct hw *me, int my_port, struct hw *dest, int dest_port, void *data); void hw_port_traverse (struct hw *me, hw_port_traverse_function *handler, void *data); /* DESTINATION is attached (detached) to LINE of the device ME Port conversion Users refer to port numbers symbolically. For instance a device may refer to its `INT' signal which is internally represented by port 3. To convert to/from the symbolic and internal representation of a port name/number. The following functions are available. */ int hw_port_decode (struct hw *me, const char *symbolic_name, port_direction direction); int hw_port_encode (struct hw *me, int port_number, char *buf, int sizeof_buf, port_direction direction); #endif
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