--- /dev/null
+/*\r
+ FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.\r
+ All rights reserved\r
+\r
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
+\r
+ This file is part of the FreeRTOS distribution and was contributed\r
+ to the project by Technolution B.V. (www.technolution.nl,\r
+ freertos-riscv@technolution.eu) under the terms of the FreeRTOS\r
+ contributors license.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify it under\r
+ the terms of the GNU General Public License (version 2) as published by the\r
+ Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.\r
+\r
+ ***************************************************************************\r
+ >>! NOTE: The modification to the GPL is included to allow you to !<<\r
+ >>! distribute a combined work that includes FreeRTOS without being !<<\r
+ >>! obliged to provide the source code for proprietary components !<<\r
+ >>! outside of the FreeRTOS kernel. !<<\r
+ ***************************************************************************\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
+ FOR A PARTICULAR PURPOSE. Full license text is available on the following\r
+ link: http://www.freertos.org/a00114.html\r
+\r
+ ***************************************************************************\r
+ * *\r
+ * FreeRTOS provides completely free yet professionally developed, *\r
+ * robust, strictly quality controlled, supported, and cross *\r
+ * platform software that is more than just the market leader, it *\r
+ * is the industry's de facto standard. *\r
+ * *\r
+ * Help yourself get started quickly while simultaneously helping *\r
+ * to support the FreeRTOS project by purchasing a FreeRTOS *\r
+ * tutorial book, reference manual, or both: *\r
+ * http://www.FreeRTOS.org/Documentation *\r
+ * *\r
+ ***************************************************************************\r
+\r
+ http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading\r
+ the FAQ page "My application does not run, what could be wrong?". Have you\r
+ defined configASSERT()?\r
+\r
+ http://www.FreeRTOS.org/support - In return for receiving this top quality\r
+ embedded software for free we request you assist our global community by\r
+ participating in the support forum.\r
+\r
+ http://www.FreeRTOS.org/training - Investing in training allows your team to\r
+ be as productive as possible as early as possible. Now you can receive\r
+ FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers\r
+ Ltd, and the world's leading authority on the world's leading RTOS.\r
+\r
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
+ including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
+ compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
+\r
+ http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
+ Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
+\r
+ http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High\r
+ Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS\r
+ licenses offer ticketed support, indemnification and commercial middleware.\r
+\r
+ http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
+ engineered and independently SIL3 certified version for use in safety and\r
+ mission critical applications that require provable dependability.\r
+\r
+ 1 tab == 4 spaces!\r
+*/\r
+\r
+/*-----------------------------------------------------------\r
+ * Implementation of functions defined in portable.h for the RISC-V port.\r
+ *----------------------------------------------------------*/\r
+\r
+/* Scheduler includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "portmacro.h"\r
+\r
+#include "riscv_hal.h"\r
+\r
+#ifdef __riscv64\r
+# define STORE sd\r
+# define LOAD ld\r
+# define REGBYTES 8\r
+#else\r
+# define STORE sw\r
+# define LOAD lw\r
+# define REGBYTES 4\r
+#endif\r
+/* A variable is used to keep track of the critical section nesting. This\r
+variable has to be stored as part of the task context and must be initialized to\r
+a non zero value to ensure interrupts don't inadvertently become unmasked before\r
+the scheduler starts. As it is stored as part of the task context it will\r
+automatically be set to 0 when the first task is started. */\r
+static UBaseType_t uxCriticalNesting = 0xaaaaaaaa;\r
+\r
+/* Contains context when starting scheduler, save all 31 registers */\r
+#ifdef __gracefulExit\r
+BaseType_t xStartContext[31] = {0};\r
+#endif\r
+\r
+\r
+typedef struct\r
+{\r
+ uint32_t val_low;\r
+ uint32_t val_high;\r
+}riscv_machine_timer_t;\r
+\r
+static volatile riscv_machine_timer_t *mtime = (riscv_machine_timer_t *)0x4400BFF8;\r
+\r
+static volatile riscv_machine_timer_t *mtimecmp = (riscv_machine_timer_t *)0x44004000;\r
+\r
+/*\r
+ * Setup the timer to generate the tick interrupts.\r
+ */\r
+void vPortSetupTimer( void );\r
+\r
+/*\r
+ * Set the next interval for the timer\r
+ */\r
+static void prvSetNextTimerInterrupt( void );\r
+\r
+/*\r
+ * Used to catch tasks that attempt to return from their implementing function.\r
+ */\r
+static void prvTaskExitError( void );\r
+\r
+void vPortEnterCritical( void )\r
+{\r
+ portDISABLE_INTERRUPTS();\r
+ uxCriticalNesting++;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortExitCritical( void )\r
+{\r
+ uxCriticalNesting--;\r
+ if( uxCriticalNesting == 0 )\r
+ {\r
+ portENABLE_INTERRUPTS();\r
+ }\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Sets the next timer interrupt\r
+ * Reads previous timer compare register, and adds tickrate */\r
+static void prvSetNextTimerInterrupt(void)\r
+{\r
+ uint64_t time;\r
+\r
+ time = mtime->val_low;\r
+ time |= ((uint64_t)mtime->val_high << 32);\r
+\r
+ time += (configCPU_CLOCK_HZ / configTICK_RATE_HZ);\r
+\r
+ mtimecmp->val_low = (uint32_t)(time & 0xFFFFFFFF);\r
+ mtimecmp->val_high = (uint32_t)((time >> 32) & 0xFFFFFFFF);\r
+\r
+ /* Enable timer interrupt */\r
+ __asm volatile("csrs mie,%0"::"r"(0x80));\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Sets and enable the timer interrupt */\r
+void vPortSetupTimer(void)\r
+{\r
+ uint64_t time;\r
+\r
+ time = mtime->val_low;\r
+ time |= ((uint64_t)mtime->val_high << 32);\r
+\r
+ time += (configCPU_CLOCK_HZ / configTICK_RATE_HZ);\r
+\r
+ mtimecmp->val_low = (uint32_t)(time & 0xFFFFFFFF);\r
+ mtimecmp->val_high = (uint32_t)((time >> 32) & 0xFFFFFFFF);\r
+\r
+\r
+ /* Enable timer interrupt */\r
+ __asm volatile("csrs mie,%0"::"r"(0x80));\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void prvTaskExitError( void )\r
+{\r
+ /* A function that implements a task must not exit or attempt to return to\r
+ its caller as there is nothing to return to. If a task wants to exit it\r
+ should instead call vTaskDelete( NULL ).\r
+\r
+ Artificially force an assert() to be triggered if configASSERT() is\r
+ defined, then stop here so application writers can catch the error. */\r
+ configASSERT( uxCriticalNesting == ~0UL );\r
+ portDISABLE_INTERRUPTS();\r
+ for( ;; );\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Clear current interrupt mask and set given mask */\r
+void vPortClearInterruptMask(int mask)\r
+{\r
+ __asm volatile("csrw mie, %0"::"r"(mask));\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Set interrupt mask and return current interrupt enable register */\r
+int vPortSetInterruptMask(void)\r
+{\r
+ int ret;\r
+ __asm volatile("csrr %0,mie":"=r"(ret));\r
+ __asm volatile("csrc mie,%0"::"i"(7));\r
+ return ret;\r
+}\r
+\r
+/*\r
+ * See header file for description.\r
+ */\r
+StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters )\r
+{\r
+ /* Simulate the stack frame as it would be created by a context switch\r
+ interrupt. */\r
+ register int *tp asm("x3");\r
+ pxTopOfStack--;\r
+ *pxTopOfStack = (portSTACK_TYPE)pxCode; /* Start address */\r
+ pxTopOfStack -= 22;\r
+ *pxTopOfStack = (portSTACK_TYPE)pvParameters; /* Register a0 */\r
+ pxTopOfStack -= 6;\r
+ *pxTopOfStack = (portSTACK_TYPE)tp; /* Register thread pointer */\r
+ pxTopOfStack -= 3;\r
+ *pxTopOfStack = (portSTACK_TYPE)prvTaskExitError; /* Register ra */\r
+ \r
+ return pxTopOfStack;\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+void vPortSysTickHandler( void )\r
+{\r
+ /*Save Context*/\r
+ {\r
+ __asm volatile("lw t0, pxCurrentTCB");\r
+ __asm volatile("sw a2, 0x0(t0)");\r
+ }\r
+\r
+ /* Increment the RTOS tick. */\r
+ prvSetNextTimerInterrupt();\r
+\r
+ /*Switch task */\r
+ if( xTaskIncrementTick() != pdFALSE )\r
+ {\r
+ vTaskSwitchContext();\r
+ }\r
+\r
+ /*Restore Context*/\r
+ {\r
+ __asm volatile("lw sp, pxCurrentTCB");\r
+ __asm volatile("lw sp, 0x0(sp)");\r
+\r
+ __asm volatile("lw t0, 31 * 4(sp)");\r
+ __asm volatile("csrw mepc, t0");\r
+\r
+ __asm volatile("lw x1, 0x0(sp)");\r
+ __asm volatile("lw x4, 3 * 4(sp)");\r
+ __asm volatile("lw x5, 4 * 4(sp)");\r
+ __asm volatile("lw x6, 5 * 4(sp)");\r
+ __asm volatile("lw x7, 6 * 4(sp)");\r
+ __asm volatile("lw x8, 7 * 4(sp)");\r
+ __asm volatile("lw x9, 8 * 4(sp)");\r
+ __asm volatile("lw x10, 9 * 4(sp)");\r
+ __asm volatile("lw x11, 10 * 4(sp)");\r
+ __asm volatile("lw x12, 11 * 4(sp)");\r
+ __asm volatile("lw x13, 12 * 4(sp)");\r
+ __asm volatile("lw x14, 13 * 4(sp)");\r
+ __asm volatile("lw x15, 14 * 4(sp)");\r
+ __asm volatile("lw x16, 15 * 4(sp)");\r
+ __asm volatile("lw x17, 16 * 4(sp)");\r
+ __asm volatile("lw x18, 17 * 4(sp)");\r
+ __asm volatile("lw x19, 18 * 4(sp)");\r
+ __asm volatile("lw x20, 19 * 4(sp)");\r
+ __asm volatile("lw x21, 20 * 4(sp)");\r
+ __asm volatile("lw x22, 21 * 4(sp)");\r
+ __asm volatile("lw x23, 22 * 4(sp)");\r
+ __asm volatile("lw x24, 23 * 4(sp)");\r
+ __asm volatile("lw x25, 24 * 4(sp)");\r
+ __asm volatile("lw x26, 25 * 4(sp)");\r
+ __asm volatile("lw x27, 26 * 4(sp)");\r
+ __asm volatile("lw x28, 27 * 4(sp)");\r
+ __asm volatile("lw x29, 28 * 4(sp)");\r
+ __asm volatile("lw x30, 29 * 4(sp)");\r
+ __asm volatile("lw x31, 30 * 4(sp)");\r
+\r
+ __asm volatile("addi sp, sp, 4 * 32");\r
+\r
+ __asm volatile("mret");\r
+ }\r
+}\r
+uint32_t g_startscheduler = 0;\r
+BaseType_t xPortStartScheduler( void )\r
+{\r
+ vPortSetupTimer();\r
+ uxCriticalNesting = 0;\r
+ g_startscheduler = 1;\r
+ __enable_irq();\r
+\r
+ raise_soft_interrupt();\r
+\r
+ /*Should not get here*/\r
+ return pdFALSE;\r
+}\r
+\r
+void Software_IRQHandler(void)\r
+{\r
+ if(1 == g_startscheduler)\r
+ {\r
+ g_startscheduler = 2; //skip the save n switch context first time when scheduler is starting.\r
+ }\r
+ else\r
+ {\r
+ /*Save Context*/\r
+ {\r
+ __asm volatile("lw t0, pxCurrentTCB");\r
+ __asm volatile("sw a2, 0x0(t0)");\r
+ }\r
+\r
+ vTaskSwitchContext();\r
+ }\r
+\r
+ /*Restore Context*/\r
+ {\r
+ __asm volatile("lw sp, pxCurrentTCB");\r
+ __asm volatile("lw sp, 0x0(sp)");\r
+\r
+ __asm volatile("lw t0, 31 * 4(sp)");\r
+ __asm volatile("csrw mepc, t0");\r
+\r
+ __asm volatile("lw x1, 0x0(sp)");\r
+ __asm volatile("lw x4, 3 * 4(sp)");\r
+ __asm volatile("lw x5, 4 * 4(sp)");\r
+ __asm volatile("lw x6, 5 * 4(sp)");\r
+ __asm volatile("lw x7, 6 * 4(sp)");\r
+ __asm volatile("lw x8, 7 * 4(sp)");\r
+ __asm volatile("lw x9, 8 * 4(sp)");\r
+ __asm volatile("lw x10, 9 * 4(sp)");\r
+ __asm volatile("lw x11, 10 * 4(sp)");\r
+ __asm volatile("lw x12, 11 * 4(sp)");\r
+ __asm volatile("lw x13, 12 * 4(sp)");\r
+ __asm volatile("lw x14, 13 * 4(sp)");\r
+ __asm volatile("lw x15, 14 * 4(sp)");\r
+ __asm volatile("lw x16, 15 * 4(sp)");\r
+ __asm volatile("lw x17, 16 * 4(sp)");\r
+ __asm volatile("lw x18, 17 * 4(sp)");\r
+ __asm volatile("lw x19, 18 * 4(sp)");\r
+ __asm volatile("lw x20, 19 * 4(sp)");\r
+ __asm volatile("lw x21, 20 * 4(sp)");\r
+ __asm volatile("lw x22, 21 * 4(sp)");\r
+ __asm volatile("lw x23, 22 * 4(sp)");\r
+ __asm volatile("lw x24, 23 * 4(sp)");\r
+ __asm volatile("lw x25, 24 * 4(sp)");\r
+ __asm volatile("lw x26, 25 * 4(sp)");\r
+ __asm volatile("lw x27, 26 * 4(sp)");\r
+ __asm volatile("lw x28, 27 * 4(sp)");\r
+ __asm volatile("lw x29, 28 * 4(sp)");\r
+ __asm volatile("lw x30, 29 * 4(sp)");\r
+ __asm volatile("lw x31, 30 * 4(sp)");\r
+\r
+ __asm volatile("addi sp, sp, 4 * 32");\r
+\r
+ //PRCI->MSIP[0] = 0x00;\r
+\r
+ __asm volatile("addi sp, sp, -1*4");\r
+ __asm volatile("sw t0, 0(sp)");\r
+ __asm volatile("li t0, 0x44000000"); // address of PRCI->MSIP[0]\r
+ __asm volatile("sw zero,0(t0)");\r
+ __asm volatile("lw t0, 0(sp)");\r
+ __asm volatile("addi sp, sp, 1*4");\r
+\r
+ __asm volatile("mret");\r
+ }\r
+}\r
+\r
+void vPortYield( void )\r
+{\r
+ raise_soft_interrupt();\r
+}\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.\r
+ All rights reserved\r
+\r
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
+\r
+ This file is part of the FreeRTOS distribution and was contributed\r
+ to the project by Technolution B.V. (www.technolution.nl,\r
+ freertos-riscv@technolution.eu) under the terms of the FreeRTOS\r
+ contributors license.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify it under\r
+ the terms of the GNU General Public License (version 2) as published by the\r
+ Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.\r
+\r
+ ***************************************************************************\r
+ >>! NOTE: The modification to the GPL is included to allow you to !<<\r
+ >>! distribute a combined work that includes FreeRTOS without being !<<\r
+ >>! obliged to provide the source code for proprietary components !<<\r
+ >>! outside of the FreeRTOS kernel. !<<\r
+ ***************************************************************************\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
+ FOR A PARTICULAR PURPOSE. Full license text is available on the following\r
+ link: http://www.freertos.org/a00114.html\r
+\r
+ ***************************************************************************\r
+ * *\r
+ * FreeRTOS provides completely free yet professionally developed, *\r
+ * robust, strictly quality controlled, supported, and cross *\r
+ * platform software that is more than just the market leader, it *\r
+ * is the industry''s de facto standard. *\r
+ * *\r
+ * Help yourself get started quickly while simultaneously helping *\r
+ * to support the FreeRTOS project by purchasing a FreeRTOS *\r
+ * tutorial book, reference manual, or both: *\r
+ * http://www.FreeRTOS.org/Documentation *\r
+ * *\r
+ ***************************************************************************\r
+\r
+ http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading\r
+ the FAQ page "My application does not run, what could be wrong?". Have you\r
+ defined configASSERT()?\r
+\r
+ http://www.FreeRTOS.org/support - In return for receiving this top quality\r
+ embedded software for free we request you assist our global community by\r
+ participating in the support forum.\r
+\r
+ http://www.FreeRTOS.org/training - Investing in training allows your team to\r
+ be as productive as possible as early as possible. Now you can receive\r
+ FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers\r
+ Ltd, and the world's leading authority on the world's leading RTOS.\r
+\r
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
+ including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
+ compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
+\r
+ http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
+ Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
+\r
+ http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High\r
+ Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS\r
+ licenses offer ticketed support, indemnification and commercial middleware.\r
+\r
+ http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
+ engineered and independently SIL3 certified version for use in safety and\r
+ mission critical applications that require provable dependability.\r
+\r
+ 1 tab == 4 spaces!\r
+*/\r
+\r
+\r
+#ifdef __riscv64\r
+# define STORE sd\r
+# define LOAD ld\r
+# define REGBYTES 8\r
+#else\r
+# define STORE sw\r
+# define LOAD lw\r
+# define REGBYTES 4\r
+#endif\r
+\r
+#define MSTATUS_PRV1 0x1800\r
+\r
+.global portSAVE_CONTEXT\r
+.global portRESTORE_CONTEXT\r
+\r
+//.global xPortStartScheduler\r
+.global vPortYield\r
+.global vTaskIncrementTick\r
+.global vPortEndScheduler\r
+.global xExitStack\r
+\r
+\r
+/* Macro for saving task context */\r
+.macro portSAVE_CONTEXT\r
+ .global pxCurrentTCB\r
+ /* make room in stack */\r
+ addi sp, sp, -REGBYTES * 32\r
+\r
+ /* Save Context */\r
+ STORE x1, 0x0(sp)\r
+ STORE x2, 1 * REGBYTES(sp)\r
+ STORE x3, 2 * REGBYTES(sp)\r
+ STORE x4, 3 * REGBYTES(sp)\r
+ STORE x5, 4 * REGBYTES(sp)\r
+ STORE x6, 5 * REGBYTES(sp)\r
+ STORE x7, 6 * REGBYTES(sp)\r
+ STORE x8, 7 * REGBYTES(sp)\r
+ STORE x9, 8 * REGBYTES(sp)\r
+ STORE x10, 9 * REGBYTES(sp)\r
+ STORE x11, 10 * REGBYTES(sp)\r
+ STORE x12, 11 * REGBYTES(sp)\r
+ STORE x13, 12 * REGBYTES(sp)\r
+ STORE x14, 13 * REGBYTES(sp)\r
+ STORE x15, 14 * REGBYTES(sp)\r
+ STORE x16, 15 * REGBYTES(sp)\r
+ STORE x17, 16 * REGBYTES(sp)\r
+ STORE x18, 17 * REGBYTES(sp)\r
+ STORE x19, 18 * REGBYTES(sp)\r
+ STORE x20, 19 * REGBYTES(sp)\r
+ STORE x21, 20 * REGBYTES(sp)\r
+ STORE x22, 21 * REGBYTES(sp)\r
+ STORE x23, 22 * REGBYTES(sp)\r
+ STORE x24, 23 * REGBYTES(sp)\r
+ STORE x25, 24 * REGBYTES(sp)\r
+ STORE x26, 25 * REGBYTES(sp)\r
+ STORE x27, 26 * REGBYTES(sp)\r
+ STORE x28, 27 * REGBYTES(sp)\r
+ STORE x29, 28 * REGBYTES(sp)\r
+ STORE x30, 29 * REGBYTES(sp)\r
+ STORE x31, 30 * REGBYTES(sp)\r
+ \r
+ /* Store current stackpointer in task control block (TCB) */\r
+ LOAD t0, pxCurrentTCB //pointer\r
+ STORE sp, 0x0(t0)\r
+ .endm\r
+\r
+/* Saves current error program counter (EPC) as task program counter */\r
+.macro portSAVE_EPC\r
+ csrr t0, mepc\r
+ STORE t0, 31 * REGBYTES(sp)\r
+ .endm\r
+\r
+/* Saves current return adress (RA) as task program counter */\r
+.macro portSAVE_RA\r
+ STORE ra, 31 * REGBYTES(sp)\r
+ .endm\r
+\r
+/* Macro for restoring task context */\r
+.macro portRESTORE_CONTEXT\r
+\r
+ .global pxCurrentTCB\r
+ /* Load stack pointer from the current TCB */\r
+ LOAD sp, pxCurrentTCB\r
+ LOAD sp, 0x0(sp)\r
+\r
+ /* Load task program counter */\r
+ LOAD t0, 31 * REGBYTES(sp)\r
+ csrw mepc, t0\r
+\r
+ /* Restore registers,\r
+ Skip global pointer because that does not change */\r
+ LOAD x1, 0x0(sp)\r
+ LOAD x4, 3 * REGBYTES(sp)\r
+ LOAD x5, 4 * REGBYTES(sp)\r
+ LOAD x6, 5 * REGBYTES(sp)\r
+ LOAD x7, 6 * REGBYTES(sp)\r
+ LOAD x8, 7 * REGBYTES(sp)\r
+ LOAD x9, 8 * REGBYTES(sp)\r
+ LOAD x10, 9 * REGBYTES(sp)\r
+ LOAD x11, 10 * REGBYTES(sp)\r
+ LOAD x12, 11 * REGBYTES(sp)\r
+ LOAD x13, 12 * REGBYTES(sp)\r
+ LOAD x14, 13 * REGBYTES(sp)\r
+ LOAD x15, 14 * REGBYTES(sp)\r
+ LOAD x16, 15 * REGBYTES(sp)\r
+ LOAD x17, 16 * REGBYTES(sp)\r
+ LOAD x18, 17 * REGBYTES(sp)\r
+ LOAD x19, 18 * REGBYTES(sp)\r
+ LOAD x20, 19 * REGBYTES(sp)\r
+ LOAD x21, 20 * REGBYTES(sp)\r
+ LOAD x22, 21 * REGBYTES(sp)\r
+ LOAD x23, 22 * REGBYTES(sp)\r
+ LOAD x24, 23 * REGBYTES(sp)\r
+ LOAD x25, 24 * REGBYTES(sp)\r
+ LOAD x26, 25 * REGBYTES(sp)\r
+ LOAD x27, 26 * REGBYTES(sp)\r
+ LOAD x28, 27 * REGBYTES(sp)\r
+ LOAD x29, 28 * REGBYTES(sp)\r
+ LOAD x30, 29 * REGBYTES(sp)\r
+ LOAD x31, 30 * REGBYTES(sp)\r
+\r
+ addi sp, sp, REGBYTES * 32\r
+\r
+ /* Enable global interupt */\r
+ csrs mstatus,8\r
+\r
+ ret\r
+ .endm\r
+\r
+\r
+/*\r
+xPortStartScheduler:\r
+#ifdef __gracefulExit\r
+\r
+ la t0, xStartContext\r
+ STORE x1, 0x0(t0)\r
+ STORE x2, 1 * REGBYTES(t0)\r
+ STORE x3, 2 * REGBYTES(t0)\r
+ STORE x4, 3 * REGBYTES(t0)\r
+ STORE x5, 4 * REGBYTES(t0)\r
+ STORE x6, 5 * REGBYTES(t0)\r
+ STORE x7, 6 * REGBYTES(t0)\r
+ STORE x8, 7 * REGBYTES(t0)\r
+ STORE x9, 8 * REGBYTES(t0)\r
+ STORE x10, 9 * REGBYTES(t0)\r
+ STORE x11, 10 * REGBYTES(t0)\r
+ STORE x12, 11 * REGBYTES(t0)\r
+ STORE x13, 12 * REGBYTES(t0)\r
+ STORE x14, 13 * REGBYTES(t0)\r
+ STORE x15, 14 * REGBYTES(t0)\r
+ STORE x16, 15 * REGBYTES(t0)\r
+ STORE x17, 16 * REGBYTES(t0)\r
+ STORE x18, 17 * REGBYTES(t0)\r
+ STORE x19, 18 * REGBYTES(t0)\r
+ STORE x20, 19 * REGBYTES(t0)\r
+ STORE x21, 20 * REGBYTES(t0)\r
+ STORE x22, 21 * REGBYTES(t0)\r
+ STORE x23, 22 * REGBYTES(t0)\r
+ STORE x24, 23 * REGBYTES(t0)\r
+ STORE x25, 24 * REGBYTES(t0)\r
+ STORE x26, 25 * REGBYTES(t0)\r
+ STORE x27, 26 * REGBYTES(t0)\r
+ STORE x28, 27 * REGBYTES(t0)\r
+ STORE x29, 28 * REGBYTES(t0)\r
+ STORE x30, 29 * REGBYTES(t0)\r
+ STORE x31, 30 * REGBYTES(t0)\r
+#endif\r
+ jal vPortSetupTimer\r
+ portRESTORE_CONTEXT\r
+*/\r
+\r
+vPortEndScheduler:\r
+#ifdef __gracefulExit\r
+ /* Load current context from xStartContext */\r
+ la t0, xStartContext\r
+ LOAD x1, 0x0(t0)\r
+ LOAD x2, 1 * REGBYTES(t0)\r
+ LOAD x3, 2 * REGBYTES(t0)\r
+ LOAD x4, 3 * REGBYTES(t0)\r
+ LOAD x5, 4 * REGBYTES(t0)\r
+ LOAD x6, 5 * REGBYTES(t0)\r
+ LOAD x7, 6 * REGBYTES(t0)\r
+ LOAD x8, 7 * REGBYTES(t0)\r
+ LOAD x9, 8 * REGBYTES(t0)\r
+ LOAD x10, 9 * REGBYTES(t0)\r
+ LOAD x11, 10 * REGBYTES(t0)\r
+ LOAD x12, 11 * REGBYTES(t0)\r
+ LOAD x13, 12 * REGBYTES(t0)\r
+ LOAD x14, 13 * REGBYTES(t0)\r
+ LOAD x15, 14 * REGBYTES(t0)\r
+ LOAD x16, 15 * REGBYTES(t0)\r
+ LOAD x17, 16 * REGBYTES(t0)\r
+ LOAD x18, 17 * REGBYTES(t0)\r
+ LOAD x19, 18 * REGBYTES(t0)\r
+ LOAD x20, 19 * REGBYTES(t0)\r
+ LOAD x21, 20 * REGBYTES(t0)\r
+ LOAD x22, 21 * REGBYTES(t0)\r
+ LOAD x23, 22 * REGBYTES(t0)\r
+ LOAD x24, 23 * REGBYTES(t0)\r
+ LOAD x25, 24 * REGBYTES(t0)\r
+ LOAD x26, 25 * REGBYTES(t0)\r
+ LOAD x27, 26 * REGBYTES(t0)\r
+ LOAD x28, 27 * REGBYTES(t0)\r
+ LOAD x29, 28 * REGBYTES(t0)\r
+ LOAD x30, 39 * REGBYTES(t0)\r
+ LOAD x31, 30 * REGBYTES(t0)\r
+#endif\r
+ ret\r
+\r
--- /dev/null
+/*\r
+ FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.\r
+ All rights reserved\r
+\r
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
+\r
+ This file is part of the FreeRTOS distribution and was contributed\r
+ to the project by Technolution B.V. (www.technolution.nl,\r
+ freertos-riscv@technolution.eu) under the terms of the FreeRTOS\r
+ contributors license.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify it under\r
+ the terms of the GNU General Public License (version 2) as published by the\r
+ Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.\r
+\r
+ ***************************************************************************\r
+ >>! NOTE: The modification to the GPL is included to allow you to !<<\r
+ >>! distribute a combined work that includes FreeRTOS without being !<<\r
+ >>! obliged to provide the source code for proprietary components !<<\r
+ >>! outside of the FreeRTOS kernel. !<<\r
+ ***************************************************************************\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
+ FOR A PARTICULAR PURPOSE. Full license text is available on the following\r
+ link: http://www.freertos.org/a00114.html\r
+\r
+ ***************************************************************************\r
+ * *\r
+ * FreeRTOS provides completely free yet professionally developed, *\r
+ * robust, strictly quality controlled, supported, and cross *\r
+ * platform software that is more than just the market leader, it *\r
+ * is the industry's de facto standard. *\r
+ * *\r
+ * Help yourself get started quickly while simultaneously helping *\r
+ * to support the FreeRTOS project by purchasing a FreeRTOS *\r
+ * tutorial book, reference manual, or both: *\r
+ * http://www.FreeRTOS.org/Documentation *\r
+ * *\r
+ ***************************************************************************\r
+\r
+ http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading\r
+ the FAQ page "My application does not run, what could be wrong?". Have you\r
+ defined configASSERT()?\r
+\r
+ http://www.FreeRTOS.org/support - In return for receiving this top quality\r
+ embedded software for free we request you assist our global community by\r
+ participating in the support forum.\r
+\r
+ http://www.FreeRTOS.org/training - Investing in training allows your team to\r
+ be as productive as possible as early as possible. Now you can receive\r
+ FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers\r
+ Ltd, and the world's leading authority on the world's leading RTOS.\r
+\r
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
+ including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
+ compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
+\r
+ http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
+ Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
+\r
+ http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High\r
+ Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS\r
+ licenses offer ticketed support, indemnification and commercial middleware.\r
+\r
+ http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
+ engineered and independently SIL3 certified version for use in safety and\r
+ mission critical applications that require provable dependability.\r
+\r
+ 1 tab == 4 spaces!\r
+*/\r
+\r
+\r
+#ifndef PORTMACRO_H\r
+#define PORTMACRO_H\r
+\r
+#ifdef __cplusplus\r
+extern "C" {\r
+#endif\r
+\r
+/*-----------------------------------------------------------\r
+ * Port specific definitions.\r
+ *\r
+ * The settings in this file configure FreeRTOS correctly for the\r
+ * given hardware and compiler.\r
+ *\r
+ * These settings should not be altered.\r
+ *-----------------------------------------------------------\r
+ */\r
+\r
+/* Type definitions. */\r
+#define portCHAR char\r
+#define portFLOAT float\r
+#define portDOUBLE double\r
+#define portLONG long\r
+#define portSHORT short\r
+#define portBASE_TYPE long\r
+\r
+#ifdef __riscv64\r
+ #define portSTACK_TYPE uint64_t\r
+ #define portPOINTER_SIZE_TYPE uint64_t\r
+#else\r
+ #define portSTACK_TYPE uint32_t\r
+ #define portPOINTER_SIZE_TYPE uint32_t\r
+#endif\r
+\r
+typedef portSTACK_TYPE StackType_t;\r
+typedef long BaseType_t;\r
+typedef unsigned long UBaseType_t;\r
+\r
+#if( configUSE_16_BIT_TICKS == 1 )\r
+ typedef uint16_t TickType_t;\r
+ #define portMAX_DELAY ( TickType_t ) 0xffff\r
+#else\r
+ typedef uint32_t TickType_t;\r
+ #define portMAX_DELAY ( TickType_t ) 0xffffffffUL\r
+#endif\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Architecture specifics. */\r
+#define portSTACK_GROWTH ( -1 )\r
+#define portTICK_PERIOD_MS ( ( TickType_t ) (1000 / configTICK_RATE_HZ) )\r
+#ifdef __riscv64\r
+ #define portBYTE_ALIGNMENT 8\r
+#else\r
+ #define portBYTE_ALIGNMENT 4\r
+#endif\r
+#define portCRITICAL_NESTING_IN_TCB 1\r
+/*-----------------------------------------------------------*/\r
+\r
+\r
+/* Scheduler utilities. */\r
+extern void vPortYield( void );\r
+#define portYIELD() vPortYield()\r
+/*-----------------------------------------------------------*/\r
+\r
+\r
+/* Critical section management. */\r
+extern int vPortSetInterruptMask( void );\r
+extern void vPortClearInterruptMask( int );\r
+\r
+extern void vPortEnterCritical( void );\r
+extern void vPortExitCritical( void );\r
+\r
+#define portDISABLE_INTERRUPTS() __asm volatile ( "csrc mstatus,8" )\r
+#define portENABLE_INTERRUPTS() __asm volatile ( "csrs mstatus,8" )\r
+\r
+#define portENTER_CRITICAL() vPortEnterCritical()\r
+#define portEXIT_CRITICAL() vPortExitCritical()\r
+\r
+#define portSET_INTERRUPT_MASK_FROM_ISR() vPortSetInterruptMask()\r
+\r
+#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue ) vPortClearInterruptMask( uxSavedStatusValue )\r
+\r
+#define portEND_SWITCHING_ISR( xSwitchRequired ) if( xSwitchRequired ) vPortYield()\r
+/*-----------------------------------------------------------*/\r
+\r
+/* Task function macros as described on the FreeRTOS.org WEB site. */\r
+#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )\r
+\r
+#define portNOP() __asm volatile ( " nop " )\r
+\r
+#ifdef __cplusplus\r
+}\r
+#endif\r
+\r
+#endif /* PORTMACRO_H */\r
+\r
projects / freertos / commitdiff