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Core: Shared IRQ support for Nova/FOC/OKL4

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Implement shared IRQs using 'Irq_proxy' class.

Nova: Added global worker 'Irq_thread' support in core and adapted Irq_session.

FOC: Adapted IRQ session code, x86 has shared IRQ support, ARM uses the old
model. Read and set 'mode' argument (from MADT) in 'Irq_session'.

OKL4: Use generic 'Irq_proxy'

Fixes issue #390
This commit is contained in:
Sebastian Sumpf 2012-10-05 14:46:16 +02:00 committed by Norman Feske
parent 5549f6413b
commit 4a3d852b65
19 changed files with 488 additions and 353 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
base-foc/src/core/arm/platform_arm.cc
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@ -15,4 +15,4 @@
void Genode::Platform::_setup_io_port_alloc() { }
void Genode::Platform::setup_irq_mode(unsigned irq_number) { }
void Genode::Platform::setup_irq_mode(unsigned, unsigned, unsigned) { }

29
base-foc/src/core/include/arm/irq_proxy_component.h Normal file
View File

@ -0,0 +1,29 @@
/**
* \brief Base class for shared interrupts on ARM
* \author Sebastian Sumpf
* \date 2012-10-05
*/
/*
* Copyright (C) 2012 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _CORE__INCLUDE__ARM__IRQ_PROXY_COMPONENT_H_
#define _CORE__INCLUDE__ARM__IRQ_PROXY_COMPONENT_H_
#include <irq_proxy.h>
namespace Genode {
/**
* On ARM we disable shared interrupts
*/
typedef Irq_proxy_single Irq_proxy_base;
}
#endif /* _CORE__INCLUDE__ARM__IRQ_PROXY_COMPONENT_H_ */

42
base-foc/src/core/include/irq_session_component.h
View File

@ -23,48 +23,13 @@
namespace Genode {
class Irq_proxy_component;
class Irq_session_component : public Rpc_object<Irq_session>,
public List<Irq_session_component>::Element
{
private:
class Interrupt : public Avl_node<Interrupt>
{
private:
Cap_index* _cap;
Semaphore _sem;
public:
unsigned number;
Interrupt();
bool higher(Interrupt *n);
Interrupt* find_by_num(unsigned num);
Native_thread capability() { return _cap->kcap(); }
Semaphore* semaphore() { return &_sem; }
};
class Interrupt_handler : public Thread<4096>
{
private:
Interrupt_handler() { start(); }
void entry();
public:
static Native_thread handler_cap();
};
Interrupt _irq;
Range_allocator *_irq_alloc;
/*
* Each IRQ session uses a dedicated server activation
@ -73,8 +38,7 @@ namespace Genode {
Rpc_entrypoint _ep;
Irq_session_capability _irq_cap;
static Avl_tree<Interrupt>* _irqs();
Irq_proxy_component *_proxy;
public:

5
base-foc/src/core/include/platform.h
View File

@ -129,9 +129,10 @@ namespace Genode {
Core_pager *core_pager();
/**
* Set interrupt mode (e.g., level or edge)
* Set interrupt trigger/polarity (e.g., level or edge, high or low)
*/
static void setup_irq_mode(unsigned irq_number);
static void setup_irq_mode(unsigned irq_number, unsigned trigger,
unsigned polarity);
/**
* Constructor

24
base-foc/src/core/include/x86/irq_proxy_component.h Normal file
View File

@ -0,0 +1,24 @@
/**
* \brief Base class for shared interrupts on x86
* \author Sebastian Sumpf
* \date 2012-10-05
*/
/*
* Copyright (C) 2012 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _CORE__INCLUDE__X86__IRQ_PROXY_COMPONENT_H_
#define _CORE__INCLUDE__X86__IRQ_PROXY_COMPONENT_H_
#include <irq_proxy.h>
namespace Genode {
typedef Irq_proxy<Thread<1024 * sizeof(addr_t)> > Irq_proxy_base;
}
#endif /* _CORE__INCLUDE__X86__IRQ_PROXY_COMPONENT_H_ */

275
base-foc/src/core/irq_session_component.cc
View File

@ -2,6 +2,7 @@
* \brief Fiasco.OC-specific core implementation of IRQ sessions
* \author Christian Helmuth
* \author Stefan Kalkowski
* \author Sebastian Sumpf
* \date 2007-09-13
*
* FIXME ram quota missing
@ -20,6 +21,7 @@
/* core includes */
#include <irq_root.h>
#include <irq_proxy_component.h>
#include <irq_session_component.h>
#include <platform.h>
#include <util.h>
@ -34,36 +36,197 @@ namespace Fiasco {
using namespace Genode;
namespace Genode {
class Interrupt_handler;
class Irq_proxy_component;
}
Irq_session_component::Interrupt*
Irq_session_component::Interrupt::find_by_num(unsigned num)
/**
* Dispatches interrupts from kernel
*/
class Genode::Interrupt_handler : public Thread<4096>
{
if (number == num) return this;
private:
Interrupt *n = Avl_node<Interrupt>::child(num > number);
return n ? n->find_by_num(num) : 0;
Interrupt_handler() { start(); }
public:
void entry();
static Native_thread handler_cap()
{
static Interrupt_handler handler;
return handler._thread_cap.dst();
}
};
/**
* Irq_proxy interface implementation
*/
class Genode::Irq_proxy_component : public Irq_proxy_base
{
private:
Cap_index *_cap;
Semaphore _sem;
long _trigger; /* interrupt trigger */
long _polarity; /* interrupt polarity */
Native_thread _capability() const { return _cap->kcap(); }
protected:
bool _associate()
{
using namespace Fiasco;
if (l4_error(l4_factory_create_irq(L4_BASE_FACTORY_CAP, _capability()))) {
PERR("l4_factory_create_irq failed!");
return false;
}
if (l4_error(l4_icu_bind(L4_BASE_ICU_CAP, _irq_number, _capability()))) {
PERR("Binding IRQ%ld to the ICU failed", _irq_number);
return false;
}
/* set interrupt mode */
Platform::setup_irq_mode(_irq_number, _trigger, _polarity);
if (l4_error(l4_irq_attach(_capability(), _irq_number,
Interrupt_handler::handler_cap()))) {
PERR("Error attaching to IRQ %ld", _irq_number);
return false;
}
return true;
}
void _wait_for_irq()
{
using namespace Fiasco;
int err;
l4_msgtag_t tag = l4_irq_unmask(_capability());
if ((err = l4_ipc_error(tag, l4_utcb())))
PERR("IRQ unmask: %d\n", err);
_sem.down();
}
void _ack_irq() { }
public:
Irq_proxy_component(long irq_number)
:
Irq_proxy_base(irq_number),
_cap(cap_map()->insert(platform_specific()->cap_id_alloc()->alloc())),
_sem(), _trigger(-1), _polarity(-1) { }
Semaphore *semaphore() { return &_sem; }
void start(long trigger, long polarity)
{
_trigger = trigger;
_polarity = polarity;
_start();
}
bool match_mode(long trigger, long polarity)
{
if (trigger == Irq_session::TRIGGER_UNCHANGED &&
polarity == Irq_session::POLARITY_UNCHANGED)
return true;
if (_trigger < 0 && _polarity < 0)
return true;
return _trigger == trigger && _polarity == polarity;
}
long trigger() const { return _trigger; }
long polarity() const { return _polarity; }
};
/********************************
** IRQ session implementation **
********************************/
Irq_session_component::Irq_session_component(Cap_session *cap_session,
Range_allocator *irq_alloc,
const char *args)
:
_ep(cap_session, STACK_SIZE, "irqctrl"),
_proxy(0)
{
using namespace Fiasco;
long irq_number = Arg_string::find_arg(args, "irq_number").long_value(-1);
if (irq_number == -1) {
PERR("Unavailable IRQ %lx requested", irq_number);
throw Root::Invalid_args();
}
long irq_trigger = Arg_string::find_arg(args, "irq_trigger").long_value(-1);
irq_trigger = irq_trigger == -1 ? 0 : irq_trigger;
long irq_polarity = Arg_string::find_arg(args, "irq_polarity").long_value(-1);
irq_polarity = irq_polarity == -1 ? 0 : irq_polarity;
/*
* temorary hack for fiasco.oc using the local-apic,
* where old pic-line 0 maps to 2
*/
if (irq_number == 0)
irq_number = 2;
if (!(_proxy = Irq_proxy_component::get_irq_proxy<Irq_proxy_component>(irq_number,
irq_alloc))) {
PERR("No proxy for IRQ %lu found", irq_number);
throw Root::Unavailable();
}
/* sanity check */
if (!_proxy->match_mode(irq_trigger, irq_polarity)) {
PERR("Interrupt mode mismatch: IRQ %ld current mode: t: %ld p: %ld"
"request mode: trg: %ld p: %ld",
irq_number, _proxy->trigger(), _proxy->polarity(),
irq_trigger, irq_polarity);
throw Root::Unavailable();
}
/* set interrupt mode and start proxy */
_proxy->start(irq_trigger, irq_polarity);
if (!_proxy->add_sharer())
throw Root::Unavailable();
/* initialize capability */
_irq_cap = _ep.manage(this);
}
bool Irq_session_component::Interrupt::higher(Irq_session_component::Interrupt *n)
void Irq_session_component::wait_for_irq()
{
return n->number > number;
_proxy->wait_for_irq();
}
Irq_session_component::Interrupt::Interrupt()
: _cap(cap_map()->insert(platform_specific()->cap_id_alloc()->alloc())),
_sem(), number(0) {}
Native_thread Irq_session_component::Interrupt_handler::handler_cap()
Irq_session_component::~Irq_session_component()
{
static Interrupt_handler handler;
return handler._thread_cap.dst();
PERR("Implement me, immediately!");
}
void Irq_session_component::Interrupt_handler::entry()
/***************************************
** Interrupt handler implemtentation **
***************************************/
void Interrupt_handler::entry()
{
using namespace Fiasco;
@ -76,81 +239,11 @@ void Irq_session_component::Interrupt_handler::entry()
if ((err = l4_ipc_error(tag, l4_utcb())))
PERR("IRQ receive: %d\n", err);
else {
Interrupt *intr = _irqs()->first();
if (intr) {
intr = intr->find_by_num(label);
if (intr)
intr->semaphore()->up();
}
Irq_proxy_component *proxy;
proxy = Irq_proxy_component::get_irq_proxy<Irq_proxy_component>(label);
if (proxy)
proxy->semaphore()->up();
}
}
}
Avl_tree<Irq_session_component::Interrupt>* Irq_session_component::_irqs()
{
static Avl_tree<Interrupt> irqs;
return &irqs;
}
Irq_session_component::Irq_session_component(Cap_session *cap_session,
Range_allocator *irq_alloc,
const char *args)
:
_irq_alloc(irq_alloc),
_ep(cap_session, STACK_SIZE, "irqctrl")
{
using namespace Fiasco;
long irq_number = Arg_string::find_arg(args, "irq_number").long_value(-1);
if ((irq_number == -1) || _irq_alloc->alloc_addr(1, irq_number)) {
PERR("Unavailable IRQ %lx requested", irq_number);
throw Root::Invalid_args();
}
/*
* temorary hack for fiasco.oc using the local-apic,
* where old pic-line 0 maps to 2
*/
if (irq_number == 0)
irq_number = 2;
_irq.number = irq_number;
Irq_session_component::_irqs()->insert(&_irq);
if (l4_error(l4_factory_create_irq(L4_BASE_FACTORY_CAP, _irq.capability())))
PERR("l4_factory_create_irq failed!");
if (l4_error(l4_icu_bind(L4_BASE_ICU_CAP, irq_number, _irq.capability())))
PERR("Binding IRQ%ld to the ICU failed", irq_number);
/* set interrupt mode */
Platform::setup_irq_mode(irq_number);
if (l4_error(l4_irq_attach(_irq.capability(), irq_number,
Interrupt_handler::handler_cap())))
PERR("Error attaching to IRQ %ld", irq_number);
/* initialize capability */
_irq_cap = _ep.manage(this);
}
void Irq_session_component::wait_for_irq()
{
using namespace Fiasco;
int err;
l4_msgtag_t tag = l4_irq_unmask(_irq.capability());
if ((err = l4_ipc_error(tag, l4_utcb())))
PERR("IRQ unmask: %d\n", err);
_irq.semaphore()->down();
}
Irq_session_component::~Irq_session_component()
{
PERR("Implement me, immediately!");
}

2
base-foc/src/core/panda/target.mk
View File

@ -4,6 +4,8 @@ LD_TEXT_ADDR = 0x80140000
REQUIRES += arm foc_panda
SRC_CC += arm/platform_arm.cc
INC_DIR += $(REP_DIR)/src/core/include/arm
vpath io_port_session_component.cc $(GEN_CORE_DIR)/arm

1
base-foc/src/core/pbxa9/target.mk
View File

@ -2,6 +2,7 @@ include $(PRG_DIR)/../target.inc
REQUIRES += arm foc_pbxa9
SRC_CC += arm/platform_arm.cc
INC_DIR += $(REP_DIR)/src/core/include/arm
LD_TEXT_ADDR = 0x70490000

1
base-foc/src/core/vea9x4/target.mk
View File

@ -2,6 +2,7 @@ include $(PRG_DIR)/../target.inc
REQUIRES += arm foc_vea9x4
SRC_CC += arm/platform_arm.cc
INC_DIR += $(REP_DIR)/src/core/include/arm
LD_TEXT_ADDR = 0x60490000

23
base-foc/src/core/x86/platform_x86.cc
View File

@ -14,6 +14,7 @@
/* Genode includes */
#include <base/printf.h>
#include <irq_session/irq_session.h>
#include "platform.h"
#include "util.h"
@ -45,12 +46,28 @@ void Genode::Platform::_setup_io_port_alloc()
}
void Genode::Platform::setup_irq_mode(unsigned irq_number)
void Genode::Platform::setup_irq_mode(unsigned irq_number, unsigned trigger,
unsigned polarity)
{
using namespace Fiasco;
/* set IRQ below 16 to edge/high and others to level/low */
l4_umword_t mode = irq_number < 16 ? L4_IRQ_F_POS_EDGE : L4_IRQ_F_LEVEL_LOW;
/*
* Translate ACPI interrupt mode (trigger/polarity) to Fiasco APIC
* values. Default is edge/high for IRQs < 16 and level low for IRQs > 16
*/
l4_umword_t mode;
mode = (trigger == Irq_session::TRIGGER_LEVEL) ||
(irq_number > 15 && trigger == Irq_session::TRIGGER_UNCHANGED)
? L4_IRQ_F_LEVEL : L4_IRQ_F_EDGE;
mode |= (polarity == Irq_session::POLARITY_LOW) ||
(irq_number > 15 && polarity == Irq_session::POLARITY_UNCHANGED)
? L4_IRQ_F_NEG : L4_IRQ_F_POS;
/*
* Set mode
*/
if (l4_error(l4_icu_set_mode(L4_BASE_ICU_CAP, irq_number, mode)))
PERR("Setting mode for IRQ%u failed", irq_number);
}

1
base-foc/src/core/x86/target.mk
View File

@ -2,6 +2,7 @@ include $(PRG_DIR)/../target.inc
REQUIRES += x86
SRC_CC += x86/platform_x86.cc
INC_DIR += $(REP_DIR)/src/core/include/x86
vpath io_port_session_component.cc $(GEN_CORE_DIR)/x86

3
base-nova/src/base/pager/pager.cc
View File

@ -214,6 +214,9 @@ Pager_object::Pager_object(unsigned long badge)
_state.singlestep = false;
_state.sel_client_ec = Native_thread::INVALID_INDEX;
/* creates local EC */
Thread_base::start();
/* Create portal for exception handlers 0x0 - 0xd */
for (unsigned i = 0; i < PT_SEL_PAGE_FAULT; i++) {
res = create_pt(exc_pt_sel() + i, pd_sel, _tid.ec_sel,

5
base-nova/src/base/server/server.cc
View File

@ -243,6 +243,11 @@ Rpc_entrypoint::Rpc_entrypoint(Cap_session *cap_session, size_t stack_size,
throw Cpu_session::Thread_creation_failed();
_tid.ec_sel = ec_cap.local_name();
}
else
/**
* Required for core threads (creates local EC)
*/
Thread_base::start();
_rcv_buf.rcv_prepare_pt_sel_window((Nova::Utcb *)&_context->utcb);

6
base-nova/src/core/include/irq_session_component.h
View File

@ -22,20 +22,20 @@
namespace Genode {
class Irq_proxy_component;
class Irq_session_component : public Rpc_object<Irq_session>,
public List<Irq_session_component>::Element
{
private:
unsigned _irq_number;
Range_allocator *_irq_alloc;
/*
* Each IRQ session uses a dedicated server activation
*/
enum { STACK_SIZE = 2048 };
Rpc_entrypoint _ep;
Irq_session_capability _irq_cap;
Irq_proxy_component *_proxy;
public:

2
base-nova/src/core/include/nova_util.h
View File

@ -137,7 +137,7 @@ inline int map_local(Nova::Utcb *utcb,
if (verbose_local_map)
Genode::printf("::map_local: order %zx %lx:%lx %lx:%lx\n",
order, from_curr, from_end, to_curr, to_end);
order, from_curr, from_end, to_curr, to_end);
int const res = map_local(utcb,
Mem_crd((from_curr >> 12), order - get_page_size_log2(), rwx),

154
base-nova/src/core/irq_session_component.cc
View File

@ -14,10 +14,13 @@
/* Genode includes */
#include <base/printf.h>
#include <base/sleep.h>
/* core includes */
#include <irq_root.h>
#include <irq_proxy.h>
#include <platform.h>
#include <platform_pd.h>
/* NOVA includes */
#include <nova/syscalls.h>
@ -26,11 +29,129 @@
using namespace Genode;
namespace Genode {
class Irq_proxy_component;
}
/**
* Global worker (i.e. thread with SC)
*/
class Irq_thread : public Thread_base
{
private:
static void _thread_start()
{
Thread_base::myself()->entry();
sleep_forever();
}
public:
Irq_thread(char const *name) : Thread_base(name, 1024 * sizeof(addr_t)) { }
/**
* Create global EC, associate it to SC
*/
void start()
{
using namespace Nova;
addr_t pd_sel = Platform_pd::pd_core_sel();
addr_t utcb = reinterpret_cast<addr_t>(&_context->utcb);
/*
* Put IP on stack, it will be read from core pager in platform.cc
*/
addr_t *sp = reinterpret_cast<addr_t *>(_context->stack - sizeof(addr_t));
*sp = reinterpret_cast<addr_t>(_thread_start);
/* create global EC */
enum { CPU_NO = 0, GLOBAL = true };
uint8_t res = create_ec(_tid.ec_sel, pd_sel, CPU_NO,
utcb, (mword_t)sp, _tid.exc_pt_sel, GLOBAL);
if (res != NOVA_OK) {
PERR("%p - create_ec returned %d", this, res);
throw Cpu_session::Thread_creation_failed();
}
/* map startup portal from main thread */
map_local((Utcb *)Thread_base::myself()->utcb(),
Obj_crd(PT_SEL_STARTUP, 0),
Obj_crd(_tid.exc_pt_sel + PT_SEL_STARTUP, 0));
/* create SC */
unsigned sc_sel = cap_selector_allocator()->alloc();
res = create_sc(sc_sel, pd_sel, _tid.ec_sel, Qpd());
if (res != NOVA_OK) {
PERR("%p - create_sc returned returned %d", this, res);
throw Cpu_session::Thread_creation_failed();
}
}
};
/**
* Irq_proxy interface implementation
*/
class Genode::Irq_proxy_component : public Irq_proxy<Irq_thread>
{
private:
long _irq_sel; /* IRQ cap selector */
protected:
bool _associate()
{
/* alloc slector where IRQ will be mapped */
_irq_sel = cap_selector_allocator()->alloc();
/* since we run in APIC mode translate IRQ 0 (PIT) to 2 */
if (!_irq_number)
_irq_number = 2;
/* map IRQ number to selector */
int ret = map_local((Nova::Utcb *)Thread_base::myself()->utcb(),
Nova::Obj_crd(platform_specific()->gsi_base_sel() + _irq_number, 0),
Nova::Obj_crd(_irq_sel, 0),
true);
if (ret) {
PERR("Could not map IRQ %ld", _irq_number);
return false;
}
/* assign IRQ to CPU */
enum { CPU = 0 };
Nova::assign_gsi(_irq_sel, 0, CPU);
return true;
}
void _wait_for_irq()
{
if (Nova::sm_ctrl(_irq_sel, Nova::SEMAPHORE_DOWN))
nova_die();
}
void _ack_irq() { }
public:
Irq_proxy_component(long irq_number) : Irq_proxy(irq_number)
{
_start();
}
};
typedef Irq_proxy<Irq_thread> Proxy;
void Irq_session_component::wait_for_irq()
{
if (Nova::sm_ctrl(_irq_number, Nova::SEMAPHORE_DOWN))
nova_die();
_proxy->wait_for_irq();
/* interrupt ocurred and proxy woke us up */
}
@ -38,36 +159,19 @@ Irq_session_component::Irq_session_component(Cap_session *cap_session,
Range_allocator *irq_alloc,
const char *args)
:
_irq_alloc(irq_alloc),
_ep(cap_session, STACK_SIZE, "irq")
{
long irq_number = Arg_string::find_arg(args, "irq_number").long_value(-1);
if (irq_number == -1 || !irq_alloc ||
irq_alloc->alloc_addr(1, irq_number) != Range_allocator::ALLOC_OK) {
/* check if IRQ thread was started before */
_proxy = Proxy::get_irq_proxy<Irq_proxy_component>(irq_number, irq_alloc);
if (irq_number == -1 || !_proxy) {
PERR("Unavailable IRQ %lx requested", irq_number);
throw Root::Invalid_args();
}
/* alloc slector where IRQ will be mapped */
_irq_number = cap_selector_allocator()->alloc();
/* since we run in APIC mode translate IRQ 0 (PIT) to 2 */
if (!irq_number)
irq_number = 2;
/* map IRQ number to selector */
int ret = map_local((Nova::Utcb *)Thread_base::myself()->utcb(),
Nova::Obj_crd(platform_specific()->gsi_base_sel() + irq_number, 0),
Nova::Obj_crd(_irq_number, 0),
true);
if (ret) {
PERR("Could not map IRQ %d", _irq_number);
throw Root::Unavailable();
}
/* assign IRQ to CPU */
enum { CPU = 0 };
Nova::assign_gsi(_irq_number, 0, CPU);
_proxy->add_sharer();
/* initialize capability */
_irq_cap = _ep.manage(this);
}

37
base-nova/src/core/platform.cc
View File

@ -134,24 +134,44 @@ static void page_fault_handler()
}
static addr_t core_pager_stack_top()
{
enum { STACK_SIZE = 4*1024 };
static char stack[STACK_SIZE];
return (addr_t)&stack[STACK_SIZE - sizeof(addr_t)];
}
/**
* Startup handler for core threads
*/
static void startup_handler()
{
Utcb *utcb = (Utcb *)CORE_PAGER_UTCB_ADDR;
/* initial IP is on stack */
utcb->ip = *reinterpret_cast<addr_t *>(utcb->sp);
utcb->mtd = Mtd::EIP | Mtd::ESP;
utcb->set_msg_word(0);
reply((void*)core_pager_stack_top());
}
static void init_core_page_fault_handler()
{
/* create echo EC */
enum {
STACK_SIZE = 4*1024,
CPU_NO = 0,
GLOBAL = false,
EXC_BASE = 0
};
static char stack[STACK_SIZE];
addr_t sp = (addr_t)&stack[STACK_SIZE - sizeof(addr_t)];
addr_t ec_sel = cap_selector_allocator()->alloc();
uint8_t ret = create_ec(ec_sel, __core_pd_sel, CPU_NO,
CORE_PAGER_UTCB_ADDR, (addr_t)sp, EXC_BASE,
GLOBAL);
CORE_PAGER_UTCB_ADDR, core_pager_stack_top(),
EXC_BASE, GLOBAL);
if (ret)
PDBG("create_ec returned %u", ret);
@ -159,6 +179,11 @@ static void init_core_page_fault_handler()
create_pt(PT_SEL_PAGE_FAULT, __core_pd_sel, ec_sel,
Mtd(Mtd::QUAL | Mtd::ESP | Mtd::EIP),
(addr_t)page_fault_handler);
/* startup portal for global core threads */
create_pt(PT_SEL_STARTUP, __core_pd_sel, ec_sel,
Mtd(Mtd::EIP | Mtd::ESP),
(addr_t)startup_handler);
}

40
base-nova/src/core/thread_start.cc
View File

@ -30,13 +30,13 @@
using namespace Genode;
/**
* This function is called for constructing server activations and pager
* objects. It allocates capability selectors for the thread's execution
* context and a synchronization-helper semaphore needed for 'Lock'.
*/
void Thread_base::_init_platform_thread()
{
/*
* This function is called for constructing server activations and pager
* objects. It allocates capability selectors for the thread's execution
* context and a synchronization-helper semaphore needed for 'Lock'.
*/
using namespace Nova;
_tid.ec_sel = cap_selector_allocator()->alloc();
@ -50,18 +50,6 @@ void Thread_base::_init_platform_thread()
PERR("create_sm returned %u", res);
throw Cpu_session::Thread_creation_failed();
}
addr_t sp = reinterpret_cast<addr_t>(&_context->stack[-4]);
addr_t utcb = reinterpret_cast<addr_t>(&_context->utcb);
/* create local EC */
enum { CPU_NO = 0, GLOBAL = false };
res = create_ec(_tid.ec_sel, pd_sel, CPU_NO,
utcb, sp, _tid.exc_pt_sel, GLOBAL);
if (res != NOVA_OK) {
PERR("%p - create_ec returned %d", this, res);
throw Cpu_session::Thread_creation_failed();
}
}
@ -84,10 +72,26 @@ void Thread_base::_deinit_platform_thread()
void Thread_base::start()
{
/*
* On NOVA, core never starts regular threads.
* On NOVA, core almost nerver starts regular threads. This simply creates a
* local EC
*/
using namespace Nova;
addr_t sp = reinterpret_cast<addr_t>(&_context->stack[-4]);
addr_t utcb = reinterpret_cast<addr_t>(&_context->utcb);
addr_t pd_sel = Platform_pd::pd_core_sel();
/* create local EC */
enum { CPU_NO = 0, GLOBAL = false };
uint8_t res = create_ec(_tid.ec_sel, pd_sel, CPU_NO,
utcb, sp, _tid.exc_pt_sel, GLOBAL);
if (res != NOVA_OK) {
PERR("%p - create_ec returned %d", this, res);
throw Cpu_session::Thread_creation_failed();
}
}
void Thread_base::cancel_blocking()
{
using namespace Nova;

189
base-okl4/src/core/irq_session_component.cc
View File

@ -12,14 +12,10 @@
* under the terms of the GNU General Public License version 2.
*/
/* Genode includes */
#include <base/printf.h>
#include <base/env.h>
#include <util/arg_string.h>
#include <irq_proxy.h>
/* core includes */
#include <irq_root.h>
#include <util.h>
/* OKL4 includes */
namespace Okl4 { extern "C" {
@ -30,8 +26,14 @@ namespace Okl4 { extern "C" {
#include <l4/ipc.h>
} }
using namespace Genode;
using namespace Okl4;
using namespace Genode;
/**
* Proxy class with generic thread
*/
typedef Irq_proxy<Thread<0x1000> > Proxy;
/* XXX move this functionality to a central place instead of duplicating it */
@ -43,55 +45,12 @@ static inline Okl4::L4_ThreadId_t thread_get_my_global_id()
}
/******************************
** Shared-interrupt support **
******************************/
class Irq_blocker : public List<Irq_blocker>::Element
{
private:
Lock _wait_lock;
public:
Irq_blocker() : _wait_lock(Lock::LOCKED) { }
void block() { _wait_lock.lock(); }
void unblock() { _wait_lock.unlock(); }
};
/*
* Proxy thread that associates to the interrupt and unblocks waiting irqctrl
* threads. Maybe, we should utilize our signals for interrupt delivery...
*
* XXX resources are not accounted as the interrupt is shared
/**
* Platform-specific proxy code
*/
class Irq_proxy : public Thread<0x1000>,
public List<Irq_proxy>::Element
class Irq_proxy_component : public Proxy
{
private:
char _name[32];
Lock _startup_lock;
long _irq_number;
Lock _mutex; /* protects this object */
int _num_sharers; /* number of clients sharing this IRQ */
Semaphore _sleep; /* wake me up if aspired blockers return */
List<Irq_blocker> _blocker_list;
int _num_blockers; /* number of currently blocked clients */
bool _woken_up; /* client decided to wake me up -
this prevents multiple wakeups
to happen during initialization */
const char *_construct_name(long irq_number)
{
snprintf(_name, sizeof(_name), "irqproxy%02lx", irq_number);
return _name;
}
protected:
bool _associate()
{
@ -126,126 +85,28 @@ class Irq_proxy : public Thread<0x1000>,
return true;
}
void _loop()
void _wait_for_irq()
{
/* wait for first blocker */
_sleep.down();
/* wait for asynchronous interrupt notification */
L4_ThreadId_t partner = L4_nilthread;
L4_ReplyWait(partner, &partner);
}
while (1) {
/* wait for asynchronous interrupt notification */
L4_ThreadId_t partner = L4_nilthread;
L4_ReplyWait(partner, &partner);
{
Lock::Guard lock_guard(_mutex);
/* inform blocked clients */
Irq_blocker *b;
while ((b = _blocker_list.first())) {
_blocker_list.remove(b);
b->unblock();
}
/* reset blocker state */
_num_blockers = 0;
_woken_up = false;
}
/*
* We must wait for all clients to ack their interrupt,
* otherwise level-triggered interrupts will occur immediately
* after acknowledgement. That's an inherent security problem
* with shared IRQs and induces problems with dynamic driver
* load and unload.
*/
_sleep.down();
/* acknowledge previous interrupt */
L4_LoadMR(0, _irq_number);
L4_AcknowledgeInterrupt(0, 0);
}
void _ack_irq()
{
L4_LoadMR(0, _irq_number);
L4_AcknowledgeInterrupt(0, 0);
}
public:
Irq_proxy(long irq_number)
:
Thread<0x1000>(_construct_name(irq_number)),
_startup_lock(Lock::LOCKED), _irq_number(irq_number),
_mutex(Lock::UNLOCKED), _num_sharers(0), _num_blockers(0), _woken_up(false)
Irq_proxy_component(long irq_number) : Irq_proxy(irq_number)
{
start();
_startup_lock.lock();
}
/**
* Thread interface
*/
void entry()
{
if (_associate()) {
_startup_lock.unlock();
_loop();
}
}
/**
* Block until interrupt occured
*/
void wait_for_irq()
{
Irq_blocker blocker;
{
Lock::Guard lock_guard(_mutex);
_blocker_list.insert(&blocker);
_num_blockers++;
/*
* The proxy thread is woken up if no client woke it up before
* and this client is the last aspired blocker.
*/
if (!_woken_up && _num_blockers == _num_sharers) {
_sleep.up();
_woken_up = true;
}
}
blocker.block();
}
long irq_number() const { return _irq_number; }
void add_sharer()
{
Lock::Guard lock_guard(_mutex);
++_num_sharers;
_start();
}
};
static Irq_proxy *get_irq_proxy(long irq_number, Range_allocator *irq_alloc = 0)
{
static List<Irq_proxy> proxies;
static Lock proxies_lock;
Lock::Guard lock_guard(proxies_lock);
/* lookup proxy in database */
for (Irq_proxy *p = proxies.first(); p; p = p->next())
if (p->irq_number() == irq_number)
return p;
/* try to create proxy */
if (!irq_alloc || irq_alloc->alloc_addr(1, irq_number) != Range_allocator::ALLOC_OK)
return 0;
Irq_proxy *new_proxy = new (env()->heap()) Irq_proxy(irq_number);
proxies.insert(new_proxy);
return new_proxy;
}
/***************************
** IRQ session component **
***************************/
@ -259,7 +120,7 @@ bool Irq_session_component::Irq_control_component::associate_to_irq(unsigned irq
void Irq_session_component::wait_for_irq()
{
/* block at interrupt proxy */
Irq_proxy *p = get_irq_proxy(_irq_number);
Proxy *p = Proxy::get_irq_proxy<Irq_proxy_component>(_irq_number);
if (!p) {
PERR("Expected to find IRQ proxy for IRQ %02x", _irq_number);
return;
@ -293,7 +154,7 @@ Irq_session_component::Irq_session_component(Cap_session *cap_session,
}
/* check if IRQ thread was started before */
Irq_proxy *irq_proxy = get_irq_proxy(irq_number, irq_alloc);
Proxy *irq_proxy = Proxy::get_irq_proxy<Irq_proxy_component>(irq_number, irq_alloc);
if (!irq_proxy) {
PERR("unavailable IRQ %lx requested", irq_number);