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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*/
#include <linux/fs.h>
#include <linux/fcntl.h>
#include <linux/memblock.h>
#include <linux/mm.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include <mem.h>
#include <pci.h>
u32 memsize, highmemsize;
void __init prom_init_memory(void)
{
memblock_add(0x0, (memsize << 20));
#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
{
int bit;
bit = fls(memsize + highmemsize);
if (bit != ffs(memsize + highmemsize))
bit += 20;
else
bit = bit + 20 - 1;
/* set cpu window3 to map CPU to DDR: 2G -> 2G */
LOONGSON_ADDRWIN_CPUTODDR(ADDRWIN_WIN3, 0x80000000ul,
0x80000000ul, (1 << bit));
mmiowb();
}
#endif /* !CONFIG_CPU_SUPPORTS_ADDRWINCFG */
#ifdef CONFIG_64BIT
if (highmemsize > 0)
memblock_add(LOONGSON_HIGHMEM_START, highmemsize << 20);
#endif /* !CONFIG_64BIT */
}
|
