blob: 65b30381467aee2296685d4eefd87884f95c2d65 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* Copyright (c) 2006-2026, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <rtthread.h>
/*
* Generic startup preserves the firmware-provided FDT before entering the
* kernel. The generic DM setup provides the strong implementation; a BSP with
* custom setup may override this hook when it still uses the common startup.
*/
rt_weak void rt_hw_fdt_install_early(void *fdt)
{
RT_UNUSED(fdt);
}
/*
* This runs after gp and a temporary stack are ready, before normal C
* runtime state is available.
*/
rt_weak void riscv_early_setup(void)
{
}
rt_weak void riscv_bss_init(void)
{
extern rt_uint8_t __bss_start[];
extern rt_uint8_t __bss_end[];
volatile rt_uint8_t *ptr = __bss_start;
rt_ubase_t *word, *word_end, word_start;
word_start = RT_ALIGN((rt_ubase_t)__bss_start, sizeof(rt_ubase_t));
while (ptr < __bss_end && (rt_ubase_t)ptr < word_start)
{
*ptr++ = 0;
}
word = (rt_ubase_t *)ptr;
word_end = (rt_ubase_t *)RT_ALIGN_DOWN((rt_ubase_t)__bss_end, sizeof(rt_ubase_t));
while (word < word_end)
{
*word++ = 0;
}
ptr = (rt_uint8_t *)word;
while (ptr < __bss_end)
{
*ptr++ = 0;
}
}
|
