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genode/repos/base/include/irq_session/connection.h

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Imported Genode release 11.11
2011-12-22 15:19:25 +00:00
/*
* \brief Connection to IRQ service
* \author Norman Feske
* \date 2008-08-22
*/
/*
Adjust file headers to refer to the AGPLv3
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* Copyright (C) 2008-2017 Genode Labs GmbH
Imported Genode release 11.11
2011-12-22 15:19:25 +00:00
*
* This file is part of the Genode OS framework, which is distributed
Adjust file headers to refer to the AGPLv3
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* under the terms of the GNU Affero General Public License version 3.
Imported Genode release 11.11
2011-12-22 15:19:25 +00:00
*/
#ifndef _INCLUDE__IRQ_SESSION__CONNECTION_H_
#define _INCLUDE__IRQ_SESSION__CONNECTION_H_
#include <irq_session/client.h>
#include <base/connection.h>
base,os: Coding-style unification Fixes #1432
2015-03-04 20:12:14 +00:00
namespace Genode { struct Irq_connection; }
Imported Genode release 11.11
2011-12-22 15:19:25 +00:00
base,os: Coding-style unification Fixes #1432
2015-03-04 20:12:14 +00:00
struct Genode::Irq_connection : Connection<Irq_session>, Irq_session_client
{
Documentation changes on account of the book This patch removes the outdates doc/architecture.txt since the topics are covered by the book. We keep repos/os/doc/init.txt because it contains a few details not present in the book (yet). The patch streamlines the terminology a bit. Furthermore, it slightly adjusts a few source-code comments to improve the book's functional specification chapter.
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/**
* Issue session request
*
* \noapi
*/
Pass Env & as first argument to connection objects This patch supplements each existing connection type with an new constructor that is meant to replace the original one. The new one takes a reference to the component's environment as argument and thereby does not rely on the presence of the globally accessible 'env()' interface. The original constructors are marked as deprecated. Once we have completely abolished the use of the global 'env()', we will remove them. Fixes #1960
2016-05-10 15:24:51 +00:00
Capability<Irq_session> _session(Parent &parent,
unsigned irq,
Irq_session::Trigger trigger,
Irq_session::Polarity polarity,
Genode::addr_t device_config_phys)
{
base: remove Child::heap This patch improves the accounting for the backing store of session-state meta data. Originally, the session state used to be allocated by a child-local heap partition fed from the child's RAM session. However, whereas this approach was somehow practical from a runtime's (parent's) point of view, the child component could not count on the quota in its own RAM session. I.e., if the Child::heap grew at the parent side, the child's RAM session would magically diminish. This caused two problems. First, it violates assumptions of components like init that carefully manage their RAM resources (and giving most of them away their children). Second, if a child transfers most of its RAM session quota to another RAM session (like init does), the child's RAM session may actually not allow the parent's heap to grow, which is a very difficult error condition to deal with. In the new version, there is no Child::heap anymore. Instead, session states are allocated from the runtime's RAM session. In order to let children pay for these costs, the parent withdraws the local session costs from the session quota donated from the child when the child initiates a new session. Hence, in principle, all components on the route of the session request take a small bite from the session quota to pay for their local book keeping Consequently, the session quota that ends up at the server may become depleted more or less, depending on the route. In the case where the remaining quota is insufficient for the server, the server responds with 'QUOTA_EXCEEDED'. Since this behavior must generally be expected, this patch equips the client-side 'Env::session' implementation with the ability to re-issue session requests with successively growing quota donations. For several of core's services (ROM, IO_MEM, IRQ), the default session quota has now increased by 2 KiB, which should suffice for session requests to up to 3 hops as is the common case for most run scripts. For longer routes, the retry mechanism as described above comes into effect. For the time being, we give a warning whenever the server-side quota check triggers the retry mechanism. The warning may eventually be removed at a later stage.
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return session("ram_quota=6K, irq_number=%u, irq_trigger=%u, "
Pass Env & as first argument to connection objects This patch supplements each existing connection type with an new constructor that is meant to replace the original one. The new one takes a reference to the component's environment as argument and thereby does not rely on the presence of the globally accessible 'env()' interface. The original constructors are marked as deprecated. Once we have completely abolished the use of the global 'env()', we will remove them. Fixes #1960
2016-05-10 15:24:51 +00:00
" irq_polarity=%u, device_config_phys=0x%lx",
irq, trigger, polarity, device_config_phys);
}
/**
* Constructor
*
* \param irq physical interrupt number
* \param trigger interrupt trigger (e.g., level/edge)
* \param polarity interrupt trigger polarity (e.g., low/high)
*/
Irq_connection(Env &env,
unsigned irq,
Irq_session::Trigger trigger = Irq_session::TRIGGER_UNCHANGED,
Irq_session::Polarity polarity = Irq_session::POLARITY_UNCHANGED,
Genode::addr_t device_config_phys = 0)
:
Connection<Irq_session>(env, _session(env.parent(), irq, trigger,
polarity, device_config_phys)),
Irq_session_client(cap())
{ }
/**
* Constructor
*
* \noapi
* \deprecated Use the constructor with 'Env &' as first
* argument instead
*/
Irq_connection(unsigned irq,
Irq_session::Trigger trigger = Irq_session::TRIGGER_UNCHANGED,
Irq_session::Polarity polarity = Irq_session::POLARITY_UNCHANGED,
Warn about the use of deprecated env() function This patch enables warnings if one of the deprecate functions that rely in the implicit use of the global Genode::env() accessor are called. For the time being, some places within the base framework continue to rely on the global function while omitting the warning by calling 'env_deprecated' instead of 'env'. Issue #1987
2017-01-09 14:18:49 +00:00
Genode::addr_t device_config_phys = 0) __attribute__((deprecated))
Pass Env & as first argument to connection objects This patch supplements each existing connection type with an new constructor that is meant to replace the original one. The new one takes a reference to the component's environment as argument and thereby does not rely on the presence of the globally accessible 'env()' interface. The original constructors are marked as deprecated. Once we have completely abolished the use of the global 'env()', we will remove them. Fixes #1960
2016-05-10 15:24:51 +00:00
:
Warn about the use of deprecated env() function This patch enables warnings if one of the deprecate functions that rely in the implicit use of the global Genode::env() accessor are called. For the time being, some places within the base framework continue to rely on the global function while omitting the warning by calling 'env_deprecated' instead of 'env'. Issue #1987
2017-01-09 14:18:49 +00:00
Connection<Irq_session>(_session(*Genode::env_deprecated()->parent(), irq,
Pass Env & as first argument to connection objects This patch supplements each existing connection type with an new constructor that is meant to replace the original one. The new one takes a reference to the component's environment as argument and thereby does not rely on the presence of the globally accessible 'env()' interface. The original constructors are marked as deprecated. Once we have completely abolished the use of the global 'env()', we will remove them. Fixes #1960
2016-05-10 15:24:51 +00:00
trigger, polarity, device_config_phys)),
Irq_session_client(cap())
{ }
base,os: Coding-style unification Fixes #1432
2015-03-04 20:12:14 +00:00
};
Imported Genode release 11.11
2011-12-22 15:19:25 +00:00
#endif /* _INCLUDE__IRQ_SESSION__CONNECTION_H_ */
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