1 /*
2 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this list of
8 * conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 * of conditions and the following disclaimer in the documentation and/or other materials
12 * provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "los_config.h"
32 #include "uart.h"
33
34 unsigned int LosAppInit(VOID);
35 unsigned int LosShellInit(void);
36
37 // Enable EPU
EPUInit(void)38 static void EPUInit(void)
39 {
40 #if ((__FPU_PRESENT == 1U) && (__FPU_USED == 1U))
41 __asm volatile
42 (
43 " .equ CPACR, 0xE000ED88 \n"
44 " \n"
45 " ldr r0, =CPACR \n"
46 " ldr r1, [r0] \n"
47 " orr r1, r1, #(0xf << 20) \n"
48 " str r1, [r0] \n"
49 " dsb \n"
50 " isb \n"
51 " \n"
52 " .align 4 \n"
53 );
54 #endif
55 }
56
main(void)57 LITE_OS_SEC_TEXT_INIT int main(void)
58 {
59 unsigned int ret;
60
61 EPUInit();
62 UartInit();
63
64 ret = LOS_KernelInit();
65 if (ret != LOS_OK) {
66 printf("LiteOS kernel init failed! ERROR: %u\n", ret);
67 goto EXIT;
68 }
69
70 Uart0RxIrqRegister();
71
72 #if (LOSCFG_USE_SHELL == 1)
73 ret = LosShellInit();
74 if (ret != LOS_OK) {
75 printf("LosAppInit failed! ERROR: %u\n", ret);
76 }
77 #endif
78
79 ret = LosAppInit();
80 if (ret != LOS_OK) {
81 printf("LosAppInit failed! ERROR: %u\n", ret);
82 }
83
84 LOS_Start();
85
86 EXIT:
87 while (1) {
88 __asm volatile("wfi");
89 }
90 }
91
92