| /* |
| * Copyright (c) 2014 Wind River Systems, Inc. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @file |
| * @brief New thread creation for ARCv2 |
| * |
| * Core thread related primitives for the ARCv2 processor architecture. |
| */ |
| |
| #include <kernel.h> |
| #include <toolchain.h> |
| #include <kernel_structs.h> |
| #include <offsets_short.h> |
| #include <wait_q.h> |
| #ifdef CONFIG_INIT_STACKS |
| #include <string.h> |
| #endif /* CONFIG_INIT_STACKS */ |
| /* initial stack frame */ |
| struct init_stack_frame { |
| uint32_t pc; |
| uint32_t status32; |
| uint32_t r3; |
| uint32_t r2; |
| uint32_t r1; |
| uint32_t r0; |
| }; |
| |
| #if defined(CONFIG_THREAD_MONITOR) |
| /* |
| * Add a thread to the kernel's list of active threads. |
| */ |
| static ALWAYS_INLINE void thread_monitor_init(struct k_thread *thread) |
| { |
| unsigned int key; |
| |
| key = irq_lock(); |
| thread->next_thread = _kernel.threads; |
| _kernel.threads = thread; |
| irq_unlock(key); |
| } |
| #else |
| #define thread_monitor_init(thread) \ |
| do {/* do nothing */ \ |
| } while ((0)) |
| #endif /* CONFIG_THREAD_MONITOR */ |
| |
| /* |
| * @brief Initialize a new thread from its stack space |
| * |
| * The thread control structure is put at the lower address of the stack. An |
| * initial context, to be "restored" by __return_from_coop(), is put at |
| * the other end of the stack, and thus reusable by the stack when not |
| * needed anymore. |
| * |
| * The initial context is a basic stack frame that contains arguments for |
| * _thread_entry() return address, that points at _thread_entry() |
| * and status register. |
| * |
| * <options> is currently unused. |
| * |
| * @param pStackmem the pointer to aligned stack memory |
| * @param stackSize the stack size in bytes |
| * @param pEntry thread entry point routine |
| * @param parameter1 first param to entry point |
| * @param parameter2 second param to entry point |
| * @param parameter3 third param to entry point |
| * @param priority thread priority |
| * @param options thread options: K_ESSENTIAL |
| * |
| * @return N/A |
| */ |
| void _new_thread(char *pStackMem, size_t stackSize, |
| _thread_entry_t pEntry, |
| void *parameter1, void *parameter2, void *parameter3, |
| int priority, unsigned options) |
| { |
| _ASSERT_VALID_PRIO(priority, pEntry); |
| |
| char *stackEnd = pStackMem + stackSize; |
| struct init_stack_frame *pInitCtx; |
| |
| struct k_thread *thread = (struct k_thread *) pStackMem; |
| |
| #ifdef CONFIG_INIT_STACKS |
| memset(pStackMem, 0xaa, stackSize); |
| #endif |
| |
| /* carve the thread entry struct from the "base" of the stack */ |
| |
| pInitCtx = (struct init_stack_frame *)(STACK_ROUND_DOWN(stackEnd) - |
| sizeof(struct init_stack_frame)); |
| |
| pInitCtx->pc = ((uint32_t)_thread_entry_wrapper); |
| pInitCtx->r0 = (uint32_t)pEntry; |
| pInitCtx->r1 = (uint32_t)parameter1; |
| pInitCtx->r2 = (uint32_t)parameter2; |
| pInitCtx->r3 = (uint32_t)parameter3; |
| /* |
| * For now set the interrupt priority to 15 |
| * we can leave interrupt enable flag set to 0 as |
| * seti instruction in the end of the _Swap() will |
| * enable the interrupts based on intlock_key |
| * value. |
| */ |
| #ifdef CONFIG_ARC_STACK_CHECKING |
| pInitCtx->status32 = _ARC_V2_STATUS32_SC | _ARC_V2_STATUS32_E(_ARC_V2_DEF_IRQ_LEVEL); |
| thread->arch.stack_top = (uint32_t) stackEnd; |
| #else |
| pInitCtx->status32 = _ARC_V2_STATUS32_E(_ARC_V2_DEF_IRQ_LEVEL); |
| #endif |
| |
| _init_thread_base(&thread->base, priority, _THREAD_PRESTART, options); |
| |
| /* static threads overwrite them afterwards with real values */ |
| thread->init_data = NULL; |
| thread->fn_abort = NULL; |
| |
| #ifdef CONFIG_THREAD_CUSTOM_DATA |
| /* Initialize custom data field (value is opaque to kernel) */ |
| |
| thread->custom_data = NULL; |
| #endif |
| |
| #ifdef CONFIG_THREAD_MONITOR |
| /* |
| * In debug mode thread->entry give direct access to the thread entry |
| * and the corresponding parameters. |
| */ |
| thread->entry = (struct __thread_entry *)(pInitCtx); |
| #endif |
| |
| /* |
| * intlock_key is constructed based on ARCv2 ISA Programmer's |
| * Reference Manual CLRI instruction description: |
| * dst[31:6] dst[5] dst[4] dst[3:0] |
| * 26'd0 1 STATUS32.IE STATUS32.E[3:0] |
| */ |
| thread->arch.intlock_key = 0x3F; |
| thread->arch.relinquish_cause = _CAUSE_COOP; |
| thread->callee_saved.sp = |
| (uint32_t)pInitCtx - ___callee_saved_stack_t_SIZEOF; |
| |
| /* initial values in all other regs/k_thread entries are irrelevant */ |
| |
| thread_monitor_init(thread); |
| } |