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Create and map Tukija signal page on initialization.

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This commit is contained in:
Michael Mueller
2024-02-13 18:53:16 +01:00
parent 183a5154d4
commit c177c8cf50
1 changed files with 15 additions and 1 deletions
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16
src/mx/tasking/runtime.h
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@@ -6,9 +6,12 @@
#include <mx/memory/dynamic_size_allocator.h>
#include <mx/memory/fixed_size_allocator.h>
#include <mx/memory/task_allocator_interface.h>
#include <base/attached_ram_dataspace.h>
#include <mx/resource/builder.h>
#include <mx/util/core_set.h>
#include <utility>
#include <nova/syscalls.h>
#include <base/log.h>
namespace mx::tasking {
/**
@@ -30,6 +33,14 @@ public:
static bool init(const util::core_set &core_set, const std::uint16_t prefetch_distance,
const bool use_system_allocator)
{
// Create the Tukija signal page if necessary
if (!_signal_page) {
Genode::Ram_dataspace_capability ds = mx::system::Environment::ram().alloc(4096);
_signal_page = static_cast<std::uint64_t *>(mx::system::Environment::rm().attach(ds));
std::memset(_signal_page, 0, 4096);
Nova::mxinit(0, 0, reinterpret_cast<Nova::mword_t>(_signal_page));
}
// Are we ready to re-initialize the scheduler?
if (_scheduler != nullptr && _scheduler->is_running())
{
@@ -70,7 +81,7 @@ public:
if (need_new_scheduler)
{
_scheduler.reset(new (memory::GlobalHeap::allocate_cache_line_aligned(sizeof(Scheduler)))
Scheduler(core_set, prefetch_distance, *_resource_allocator));
Scheduler(core_set, prefetch_distance, *_resource_allocator, _signal_page));
}
else
{
@@ -244,6 +255,9 @@ private:
// Allocator to allocate data objects.
inline static std::unique_ptr<resource::Builder> _resource_builder = {nullptr};
// Shared page holding the signal channels for each Worker
static std::uint64_t *volatile _signal_page;
};
/**