1 /*
2 * Copyright (c) 2021 KT-Elektronik, Klaucke und Partner GmbH
3 * Copyright (c) 2024 Renesas Electronics Corporation
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <kernel_internal.h>
9 #include <zephyr/logging/log.h>
10 LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
11
12 /* variables to store the arguments of z_rx_context_switch_isr() (zephyr\arch\rx\core\switch.S)
13 * when performing a cooperative thread switch. In that case, z_rx_context_switch_isr() triggerss
14 * unmaskable interrupt 1 to actually perform the switch. The ISR to interrupt 1
15 * (switch_isr_wrapper()) reads the arguments from these variables.
16 */
17 void *coop_switch_to;
18 void **coop_switched_from;
19
arch_new_thread(struct k_thread * thread,k_thread_stack_t * stack,char * stack_ptr,k_thread_entry_t entry,void * arg1,void * arg2,void * arg3)20 void arch_new_thread(struct k_thread *thread, k_thread_stack_t *stack, char *stack_ptr,
21 k_thread_entry_t entry, void *arg1, void *arg2, void *arg3)
22 {
23 struct arch_esf *iframe;
24
25 iframe = Z_STACK_PTR_TO_FRAME(struct arch_esf, stack_ptr);
26
27 /* initial value for the PSW (bits U and I are set) */
28 iframe->psw = 0x30000;
29 /* the initial entry point is the function z_thread_entry */
30 iframe->entry_point = (uint32_t)z_thread_entry;
31 /* arguments for the call of z_thread_entry (to be written to r1-r4) */
32 iframe->r1 = (uint32_t)entry;
33 iframe->r2 = (uint32_t)arg1;
34 iframe->r3 = (uint32_t)arg2;
35 iframe->r4 = (uint32_t)arg3;
36 /* for debugging: */
37 iframe->r5 = 5;
38 iframe->r6 = 6;
39 iframe->r7 = 7;
40 iframe->r8 = 8;
41 iframe->r9 = 9;
42 iframe->r10 = 10;
43 iframe->r11 = 11;
44 iframe->r12 = 12;
45 iframe->r13 = 13;
46 iframe->r14 = 14;
47 iframe->r15 = 15;
48 iframe->acc_l = 16;
49 iframe->acc_h = 17;
50
51 thread->switch_handle = (void *)iframe;
52 }
53
arch_coprocessors_disable(struct k_thread * thread)54 int arch_coprocessors_disable(struct k_thread *thread)
55 {
56 return -ENOTSUP;
57 }
58
