blob: bdd3ae4407aebeaa2de64f04e80943c2825d163e (
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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __MACH_IMX23_H
#define __MACH_IMX23_H
#include <linux/bitfield.h>
#include <io.h>
#define DRAM_CTL14_CS0_EN BIT(0)
#define DRAM_CTL14_CS1_EN BIT(1)
#define DRAM_CTL11_COLUMNS_DIFF GENMASK(10, 8)
#define DRAM_CTL10_ROWS_DIFF GENMASK(18, 16)
#define DRAM_CTL(n) (IMX_SDRAMC_BASE + 4 * (n))
static inline u32 imx23_get_memsize(void)
{
u32 ctl10 = readl(DRAM_CTL(10));
u32 ctl11 = readl(DRAM_CTL(11));
u32 ctl14 = readl(DRAM_CTL(14));
int rows, columns, banks = 4, cs0, cs1;
columns = 12 - FIELD_GET(DRAM_CTL11_COLUMNS_DIFF, ctl11);
rows = 13 - FIELD_GET(DRAM_CTL10_ROWS_DIFF, ctl10);
cs0 = FIELD_GET(DRAM_CTL14_CS0_EN, ctl14);
cs1 = FIELD_GET(DRAM_CTL14_CS1_EN, ctl14);
return (1 << columns) * (1 << rows) * banks * (cs0 + cs1);
}
#endif /* __MACH_IMX23_H */
|
