feat: add lab-rv32i-freertos-static-task card

2026-07-21 19:14:20 +02:00
commit 62efc0c91f
65 changed files with 33788 additions and 0 deletions
@@ -0,0 +1,71 @@
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+
+/* Hazard3 testbench: mtime advances once per simulated cycle. */
+#define configCPU_CLOCK_HZ                       ( 1000000UL )
+#define configTICK_RATE_HZ                       ( 1000U )
+#define configMTIME_BASE_ADDRESS                 ( 0xC0000100UL )
+#define configMTIMECMP_BASE_ADDRESS              ( 0xC0000108UL )
+
+#define configUSE_PREEMPTION                     1
+#define configUSE_TIME_SLICING                   1
+#define configNUMBER_OF_CORES                    1
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION  0
+#define configUSE_IDLE_HOOK                      0
+#define configUSE_TICK_HOOK                      0
+#define configMAX_PRIORITIES                     5
+#define configMINIMAL_STACK_SIZE                 128
+#define configMAX_TASK_NAME_LEN                  12
+#define configTICK_TYPE_WIDTH_IN_BITS            TICK_TYPE_WIDTH_32_BITS
+#define configIDLE_SHOULD_YIELD                  1
+
+#define configSUPPORT_DYNAMIC_ALLOCATION         1
+#define configSUPPORT_STATIC_ALLOCATION          1
+#define configKERNEL_PROVIDED_STATIC_MEMORY      1
+#define configTOTAL_HEAP_SIZE                    ( 16U * 1024U )
+#define configAPPLICATION_ALLOCATED_HEAP         1
+#define configUSE_MALLOC_FAILED_HOOK             1
+#define configHEAP_CLEAR_MEMORY_ON_FREE          0
+
+#define configUSE_TIMERS                         0
+#define configUSE_MUTEXES                        0
+#define configUSE_RECURSIVE_MUTEXES              0
+#define configUSE_COUNTING_SEMAPHORES            0
+#define configUSE_TASK_NOTIFICATIONS             0
+#define configUSE_TRACE_FACILITY                 1
+#define configUSE_STATS_FORMATTING_FUNCTIONS     0
+#define configGENERATE_RUN_TIME_STATS            0
+#define configUSE_CO_ROUTINES                    0
+#define configUSE_NEWLIB_REENTRANT               0
+#define configUSE_POSIX_ERRNO                    0
+#define configCHECK_FOR_STACK_OVERFLOW           0
+#define configRECORD_STACK_HIGH_ADDRESS          1
+
+#define INCLUDE_vTaskDelay                       1
+#define INCLUDE_vTaskDelayUntil                  1
+#define INCLUDE_vTaskDelete                      1
+#define INCLUDE_vTaskSuspend                     0
+#define INCLUDE_eTaskGetState                    1
+#define INCLUDE_uxTaskPriorityGet                1
+#define INCLUDE_vTaskPrioritySet                 1
+#define INCLUDE_xTaskGetSchedulerState           1
+#define INCLUDE_uxTaskGetStackHighWaterMark      1
+
+/* Hazard3 is RV32I: no floating-point or vector register file to save. */
+#define configENABLE_FPU                         0
+#define configENABLE_VPU                         0
+
+/* Required by the pinned RISC-V port. */
+#define configISR_STACK_SIZE_WORDS               128
+
+#ifndef __ASSEMBLER__
+    #ifdef __cplusplus
+extern "C" void lab_assert_fail( const char * file, int line );
+    #else
+void lab_assert_fail( const char * file, int line );
+    #endif
+    #define configASSERT( condition ) do { if( !( condition ) ) { lab_assert_fail( __FILE__, __LINE__ ); } } while( 0 )
+#else
+    #define configASSERT( condition )
+#endif
+#endif
@@ -0,0 +1,183 @@
+#ifndef FREERTOS_CPP_TASK_STORAGE_HPP
+#define FREERTOS_CPP_TASK_STORAGE_HPP
+
+#include <stddef.h>
+#include <stdint.h>
+#include <type_traits>
+
+extern "C"
+{
+#include "FreeRTOS.h"
+#include "task.h"
+}
+
+#ifndef FREERTOS_STORAGE_CHECKPOINT
+#define FREERTOS_STORAGE_CHECKPOINT( point, object ) \
+    do                                                \
+    {                                                 \
+        ( void ) ( point );                           \
+        ( void ) ( object );                          \
+    } while( 0 )
+#endif
+
+namespace freertos
+{
+
+enum class StorageTaskState : uint8_t
+{
+    constructed,
+    ready,
+    running,
+    completed,
+    start_failed
+};
+
+template< typename Derived >
+class DynamicTask
+{
+public:
+    constexpr DynamicTask( const char * name,
+                           configSTACK_DEPTH_TYPE stack_words,
+                           UBaseType_t priority ) noexcept
+        : name_ { name }, stack_words_ { stack_words }, priority_ { priority }
+    {
+    }
+
+    DynamicTask( const DynamicTask & ) = delete;
+    DynamicTask & operator=( const DynamicTask & ) = delete;
+    DynamicTask( DynamicTask && ) = delete;
+    DynamicTask & operator=( DynamicTask && ) = delete;
+
+    bool start() noexcept
+    {
+        static_assert( std::is_base_of< DynamicTask< Derived >,
+                                        Derived >::value );
+        if( state_ != StorageTaskState::constructed )
+        {
+            return false;
+        }
+        state_ = StorageTaskState::ready;
+        const BaseType_t result = xTaskCreate(
+            &DynamicTask::trampoline, name_, stack_words_,
+            static_cast< Derived * >( this ), priority_, &handle_ );
+        if( result != pdPASS )
+        {
+            handle_ = nullptr;
+            state_ = StorageTaskState::start_failed;
+            return false;
+        }
+        FREERTOS_STORAGE_CHECKPOINT( 2U, this );
+        return true;
+    }
+
+    TaskHandle_t native_handle() const noexcept { return handle_; }
+    StorageTaskState state() const noexcept { return state_; }
+
+private:
+    static void trampoline( void * context )
+    {
+        auto * const derived = static_cast< Derived * >( context );
+        auto & base = *static_cast< DynamicTask * >( derived );
+        base.state_ = StorageTaskState::running;
+        FREERTOS_STORAGE_CHECKPOINT( 5U, derived );
+        derived->run();
+        base.state_ = StorageTaskState::completed;
+        base.handle_ = nullptr;
+        FREERTOS_STORAGE_CHECKPOINT( 7U, derived );
+        vTaskDelete( nullptr );
+        for( ;; ) {}
+    }
+
+    TaskHandle_t handle_ {};
+    const char * const name_;
+    const configSTACK_DEPTH_TYPE stack_words_;
+    const UBaseType_t priority_;
+    volatile StorageTaskState state_ { StorageTaskState::constructed };
+};
+
+template< size_t StackWords >
+struct StaticTaskStorage final
+{
+    StaticTask_t tcb {};
+    StackType_t stack[ StackWords ] {};
+};
+
+template< typename Derived, size_t StackWords >
+class StaticTask
+{
+public:
+    static_assert( StackWords > 0U, "static task needs stack storage" );
+
+    constexpr StaticTask( const char * name,
+                          UBaseType_t priority,
+                          StaticTaskStorage< StackWords > & storage ) noexcept
+        : name_ { name }, priority_ { priority }, storage_ { storage }
+    {
+    }
+
+    StaticTask( const StaticTask & ) = delete;
+    StaticTask & operator=( const StaticTask & ) = delete;
+    StaticTask( StaticTask && ) = delete;
+    StaticTask & operator=( StaticTask && ) = delete;
+
+    bool start() noexcept
+    {
+        static_assert( std::is_base_of< StaticTask< Derived, StackWords >,
+                                        Derived >::value );
+        if( state_ != StorageTaskState::constructed )
+        {
+            return false;
+        }
+        state_ = StorageTaskState::ready;
+        handle_ = xTaskCreateStatic(
+            &StaticTask::trampoline,
+            name_,
+            static_cast< configSTACK_DEPTH_TYPE >( StackWords ),
+            static_cast< Derived * >( this ),
+            priority_,
+            storage_.stack,
+            &storage_.tcb );
+        if( handle_ == nullptr )
+        {
+            state_ = StorageTaskState::start_failed;
+            return false;
+        }
+        FREERTOS_STORAGE_CHECKPOINT( 4U, this );
+        return true;
+    }
+
+    TaskHandle_t native_handle() const noexcept { return handle_; }
+    StorageTaskState state() const noexcept { return state_; }
+    const StaticTask_t * tcb_storage() const noexcept { return &storage_.tcb; }
+    const StackType_t * stack_storage() const noexcept { return storage_.stack; }
+    static constexpr size_t stack_words() noexcept { return StackWords; }
+    static constexpr size_t stack_bytes() noexcept
+    {
+        return StackWords * sizeof( StackType_t );
+    }
+
+private:
+    static void trampoline( void * context )
+    {
+        auto * const derived = static_cast< Derived * >( context );
+        auto & base = *static_cast< StaticTask * >( derived );
+        base.state_ = StorageTaskState::running;
+        FREERTOS_STORAGE_CHECKPOINT( 6U, derived );
+        derived->run();
+        base.state_ = StorageTaskState::completed;
+        base.handle_ = nullptr;
+        FREERTOS_STORAGE_CHECKPOINT( 8U, derived );
+        vTaskDelete( nullptr );
+        for( ;; ) {}
+    }
+
+    TaskHandle_t handle_ {};
+    const char * const name_;
+    const UBaseType_t priority_;
+    StaticTaskStorage< StackWords > & storage_;
+    volatile StorageTaskState state_ { StorageTaskState::constructed };
+};
+
+} // namespace freertos
+
+#endif
@@ -0,0 +1,15 @@
+#ifndef FREERTOS_RISC_V_CHIP_SPECIFIC_EXTENSIONS_H
+#define FREERTOS_RISC_V_CHIP_SPECIFIC_EXTENSIONS_H
+
+/* Hazard3 adds no architectural registers to the base RV32I context. */
+#define portasmHAS_MTIME                  1
+#define portasmHAS_SIFIVE_CLINT           0
+#define portasmADDITIONAL_CONTEXT_SIZE    0
+
+.macro portasmSAVE_ADDITIONAL_REGISTERS
+.endm
+
+.macro portasmRESTORE_ADDITIONAL_REGISTERS
+.endm
+
+#endif
@@ -0,0 +1,11 @@
+#ifndef LAB_FREESTANDING_STDLIB_H
+#define LAB_FREESTANDING_STDLIB_H
+
+/*
+ * The selected FreeRTOS sources include <stdlib.h> for standard types, but the
+ * configuration used by this card does not call hosted stdlib functions.
+ * GCC's freestanding headers provide size_t through <stddef.h>.
+ */
+#include <stddef.h>
+
+#endif
@@ -0,0 +1,17 @@
+#ifndef LAB_FREESTANDING_STRING_H
+#define LAB_FREESTANDING_STRING_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void * memcpy( void * destination, const void * source, size_t count );
+void * memset( void * destination, int value, size_t count );
+size_t strlen( const char * text );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif