2011-12-22 16:19:25 +01:00
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/*
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* \brief Core implementation of the IO_PORT session interface
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* \author Christian Helmuth
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* \date 2007-04-17
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*/
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/*
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2017-02-20 13:23:52 +01:00
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* Copyright (C) 2007-2017 Genode Labs GmbH
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2011-12-22 16:19:25 +01:00
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*
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* This file is part of the Genode OS framework, which is distributed
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2017-02-20 13:23:52 +01:00
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* under the terms of the GNU Affero General Public License version 3.
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2011-12-22 16:19:25 +01:00
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*/
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/* Genode includes */
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#include <util/string.h>
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#include <util/arg_string.h>
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#include <root/root.h>
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/* core includes */
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#include <io_port_session_component.h>
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using namespace Genode;
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/******************************
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** Constructor / destructor **
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******************************/
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Io_port_session_component::Io_port_session_component(Range_allocator *io_port_alloc,
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const char *args)
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: _io_port_alloc(io_port_alloc)
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{
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/* parse for port properties */
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unsigned base = Arg_string::find_arg(args, "io_port_base").ulong_value(0);
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unsigned size = Arg_string::find_arg(args, "io_port_size").ulong_value(0);
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/* allocate region (also checks out-of-bounds regions) */
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2012-11-28 22:50:08 +01:00
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switch (io_port_alloc->alloc_addr(size, base).value) {
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2011-12-22 16:19:25 +01:00
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2012-11-28 22:50:08 +01:00
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case Range_allocator::Alloc_return::RANGE_CONFLICT:
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base: avoid use of deprecated base/printf.h
Besides adapting the components to the use of base/log.h, the patch
cleans up a few base headers, i.e., it removes unused includes from
root/component.h, specifically base/heap.h and
ram_session/ram_session.h. Hence, components that relied on the implicit
inclusion of those headers have to manually include those headers now.
While adjusting the log messages, I repeatedly stumbled over the problem
that printing char * arguments is ambiguous. It is unclear whether to
print the argument as pointer or null-terminated string. To overcome
this problem, the patch introduces a new type 'Cstring' that allows the
caller to express that the argument should be handled as null-terminated
string. As a nice side effect, with this type in place, the optional len
argument of the 'String' class could be removed. Instead of supplying a
pair of (char const *, size_t), the constructor accepts a 'Cstring'.
This, in turn, clears the way let the 'String' constructor use the new
output mechanism to assemble a string from multiple arguments (and
thereby getting rid of snprintf within Genode in the near future).
To enforce the explicit resolution of the char * ambiguity, the 'char *'
overload of the 'print' function is marked as deleted.
Issue #1987
2016-07-13 19:07:09 +02:00
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error("I/O port ", Hex_range<uint16_t>(base, size), " not available");
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Streamline exception types
This patch reduces the number of exception types by facilitating
globally defined exceptions for common usage patterns shared by most
services. In particular, RPC functions that demand a session-resource
upgrade not longer reflect this condition via a session-specific
exception but via the 'Out_of_ram' or 'Out_of_caps' types.
Furthermore, the 'Parent::Service_denied', 'Parent::Unavailable',
'Root::Invalid_args', 'Root::Unavailable', 'Service::Invalid_args',
'Service::Unavailable', and 'Local_service::Factory::Denied' types have
been replaced by the single 'Service_denied' exception type defined in
'session/session.h'.
This consolidation eases the error handling (there are fewer exceptions
to handle), alleviates the need to convert exceptions along the
session-creation call chain, and avoids possible aliasing problems
(catching the wrong type with the same name but living in a different
scope).
2017-05-07 22:03:22 +02:00
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throw Service_denied();
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2011-12-22 16:19:25 +01:00
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2012-11-28 22:50:08 +01:00
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case Range_allocator::Alloc_return::OUT_OF_METADATA:
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base: avoid use of deprecated base/printf.h
Besides adapting the components to the use of base/log.h, the patch
cleans up a few base headers, i.e., it removes unused includes from
root/component.h, specifically base/heap.h and
ram_session/ram_session.h. Hence, components that relied on the implicit
inclusion of those headers have to manually include those headers now.
While adjusting the log messages, I repeatedly stumbled over the problem
that printing char * arguments is ambiguous. It is unclear whether to
print the argument as pointer or null-terminated string. To overcome
this problem, the patch introduces a new type 'Cstring' that allows the
caller to express that the argument should be handled as null-terminated
string. As a nice side effect, with this type in place, the optional len
argument of the 'String' class could be removed. Instead of supplying a
pair of (char const *, size_t), the constructor accepts a 'Cstring'.
This, in turn, clears the way let the 'String' constructor use the new
output mechanism to assemble a string from multiple arguments (and
thereby getting rid of snprintf within Genode in the near future).
To enforce the explicit resolution of the char * ambiguity, the 'char *'
overload of the 'print' function is marked as deleted.
Issue #1987
2016-07-13 19:07:09 +02:00
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error("I/O port allocator ran out of meta data");
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Streamline exception types
This patch reduces the number of exception types by facilitating
globally defined exceptions for common usage patterns shared by most
services. In particular, RPC functions that demand a session-resource
upgrade not longer reflect this condition via a session-specific
exception but via the 'Out_of_ram' or 'Out_of_caps' types.
Furthermore, the 'Parent::Service_denied', 'Parent::Unavailable',
'Root::Invalid_args', 'Root::Unavailable', 'Service::Invalid_args',
'Service::Unavailable', and 'Local_service::Factory::Denied' types have
been replaced by the single 'Service_denied' exception type defined in
'session/session.h'.
This consolidation eases the error handling (there are fewer exceptions
to handle), alleviates the need to convert exceptions along the
session-creation call chain, and avoids possible aliasing problems
(catching the wrong type with the same name but living in a different
scope).
2017-05-07 22:03:22 +02:00
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throw Service_denied();
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2011-12-22 16:19:25 +01:00
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2012-11-28 22:50:08 +01:00
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case Range_allocator::Alloc_return::OK: break;
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2011-12-22 16:19:25 +01:00
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}
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/* store information */
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_base = base;
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_size = size;
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}
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Io_port_session_component::~Io_port_session_component()
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{
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_io_port_alloc->free(reinterpret_cast<void *>(_base));
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}
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