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[/] [or1k/] [tags/] [start/] [gdb-5.0/] [sim/] [common/] [hw-ports.h] - Rev 579
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/* Hardware ports. Copyright (C) 1998 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 2, 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #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PCI interrupts A-D should correspond to ports 0-3; level sensative interrupts be requested with a value of one and withdrawn with a value of 0; edge sensative interrupts always have a value of 1, the event its self is treated as the interrupt.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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