1 /*
2 * Copyright (c) 2021-2023 HPMicro
3 *
4 *
5 */
6
7 #include "hpm_common.h"
8 #include "hpm_soc.h"
9 #include "hpm_l1c_drv.h"
10 #include <rtthread.h>
11
12 void system_init(void);
13
14 extern int entry(void);
15
16 extern void __libc_init_array(void);
17 extern void __libc_fini_array(void);
18
system_init(void)19 void system_init(void)
20 {
21 disable_global_irq(CSR_MSTATUS_MIE_MASK);
22 disable_irq_from_intc();
23 enable_irq_from_intc();
24 enable_global_irq(CSR_MSTATUS_MIE_MASK);
25 #ifndef CONFIG_NOT_ENABLE_ICACHE
26 l1c_ic_enable();
27 #endif
28 #ifndef CONFIG_NOT_ENABLE_DCACHE
29 l1c_dc_enable();
30 #endif
31 }
32
c_startup(void)33 __attribute__((weak)) void c_startup(void)
34 {
35 uint32_t i, size;
36 #ifdef FLASH_XIP
37 extern uint8_t __vector_ram_start__[], __vector_ram_end__[], __vector_load_addr__[];
38 size = __vector_ram_end__ - __vector_ram_start__;
39 for (i = 0; i < size; i++) {
40 *(__vector_ram_start__ + i) = *(__vector_load_addr__ + i);
41 }
42 #endif
43
44 extern uint8_t __etext[];
45 extern uint8_t __bss_start__[], __bss_end__[];
46 extern uint8_t __tbss_start__[], __tbss_end__[];
47 extern uint8_t __tdata_start__[], __tdata_end__[];
48 extern uint8_t __data_start__[], __data_end__[];
49 extern uint8_t __noncacheable_bss_start__[], __noncacheable_bss_end__[];
50 extern uint8_t __ramfunc_start__[], __ramfunc_end__[];
51 extern uint8_t __noncacheable_init_start__[], __noncacheable_init_end__[];
52
53 /* tbss section */
54 size = __tbss_end__ - __tbss_start__;
55 for (i = 0; i < size; i++) {
56 *(__tbss_start__ + i) = 0;
57 }
58
59 /* bss section */
60 size = __bss_end__ - __bss_start__;
61 for (i = 0; i < size; i++) {
62 *(__bss_start__ + i) = 0;
63 }
64
65 /* noncacheable bss section */
66 size = __noncacheable_bss_end__ - __noncacheable_bss_start__;
67 for (i = 0; i < size; i++) {
68 *(__noncacheable_bss_start__ + i) = 0;
69 }
70
71 /* tdata section LMA: etext */
72 size = __tdata_end__ - __tdata_start__;
73 for (i = 0; i < size; i++) {
74 *(__tdata_start__ + i) = *(__etext + i);
75 }
76
77 /* data section LMA: etext */
78 size = __data_end__ - __data_start__;
79 for (i = 0; i < size; i++) {
80 *(__data_start__ + i) = *(__etext + (__tdata_end__ - __tdata_start__) + i);
81 }
82
83 /* ramfunc section LMA: etext + data length */
84 size = __ramfunc_end__ - __ramfunc_start__;
85 for (i = 0; i < size; i++) {
86 *(__ramfunc_start__ + i) = *(__etext + (__data_end__ - __tdata_start__) + i);
87 }
88
89 /* noncacheable init section LMA: etext + data length + ramfunc length */
90 size = __noncacheable_init_end__ - __noncacheable_init_start__;
91 for (i = 0; i < size; i++) {
92 *(__noncacheable_init_start__ + i) = *(__etext + (__data_end__ - __tdata_start__) + (__ramfunc_end__ - __ramfunc_start__) + i);
93 }
94 }
95
main(void)96 __attribute__((weak)) int main(void)
97 {
98 while(1);
99 }
100
reset_handler(void)101 void reset_handler(void)
102 {
103 /**
104 * Disable preemptive interrupt
105 */
106 HPM_PLIC->FEATURE = 0;
107 /*
108 * Initialize LMA/VMA sections.
109 * Relocation for any sections that need to be copied from LMA to VMA.
110 */
111 c_startup();
112
113 /* Call platform specific hardware initialization */
114 system_init();
115
116 /* Do global constructors */
117 __libc_init_array();
118
119
120
121 /* Entry function */
122 entry();
123 }
124
125
_init()126 __attribute__((weak)) void _init()
127 {
128 }
129