mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
6d1970fa8a
There are some functions like sdram_size_mb can be re-used for different rockchip SoCs, just put them into common file. Add board_get_usable_ram_top() for ram_top init base on SDRAM_MAX_SIZE. Signed-off-by: Kever Yang <kever.yang@rock-chips.com> Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Added SDRAM_MAX_SIZE definition for RK3036: Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> fixup: 3036 fix for sdram_common
83 lines
2 KiB
C
83 lines
2 KiB
C
/*
|
|
* Copyright (C) 2017 Rockchip Electronics Co., Ltd.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <ram.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/sdram_common.h>
|
|
#include <dm/uclass-internal.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
size_t rockchip_sdram_size(phys_addr_t reg)
|
|
{
|
|
u32 rank, col, bk, cs0_row, cs1_row, bw, row_3_4;
|
|
size_t chipsize_mb = 0;
|
|
size_t size_mb = 0;
|
|
u32 ch;
|
|
|
|
u32 sys_reg = readl(reg);
|
|
u32 ch_num = 1 + ((sys_reg >> SYS_REG_NUM_CH_SHIFT)
|
|
& SYS_REG_NUM_CH_MASK);
|
|
|
|
debug("%s %x %x\n", __func__, (u32)reg, sys_reg);
|
|
for (ch = 0; ch < ch_num; ch++) {
|
|
rank = 1 + (sys_reg >> SYS_REG_RANK_SHIFT(ch) &
|
|
SYS_REG_RANK_MASK);
|
|
col = 9 + (sys_reg >> SYS_REG_COL_SHIFT(ch) & SYS_REG_COL_MASK);
|
|
bk = 3 - ((sys_reg >> SYS_REG_BK_SHIFT(ch)) & SYS_REG_BK_MASK);
|
|
cs0_row = 13 + (sys_reg >> SYS_REG_CS0_ROW_SHIFT(ch) &
|
|
SYS_REG_CS0_ROW_MASK);
|
|
cs1_row = 13 + (sys_reg >> SYS_REG_CS1_ROW_SHIFT(ch) &
|
|
SYS_REG_CS1_ROW_MASK);
|
|
bw = (2 >> ((sys_reg >> SYS_REG_BW_SHIFT(ch)) &
|
|
SYS_REG_BW_MASK));
|
|
row_3_4 = sys_reg >> SYS_REG_ROW_3_4_SHIFT(ch) &
|
|
SYS_REG_ROW_3_4_MASK;
|
|
|
|
chipsize_mb = (1 << (cs0_row + col + bk + bw - 20));
|
|
|
|
if (rank > 1)
|
|
chipsize_mb += chipsize_mb >> (cs0_row - cs1_row);
|
|
if (row_3_4)
|
|
chipsize_mb = chipsize_mb * 3 / 4;
|
|
size_mb += chipsize_mb;
|
|
debug("rank %d col %d bk %d cs0_row %d bw %d row_3_4 %d\n",
|
|
rank, col, bk, cs0_row, bw, row_3_4);
|
|
}
|
|
|
|
return (size_t)size_mb << 20;
|
|
}
|
|
|
|
int dram_init(void)
|
|
{
|
|
struct ram_info ram;
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
|
|
if (ret) {
|
|
debug("DRAM init failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
ret = ram_get_info(dev, &ram);
|
|
if (ret) {
|
|
debug("Cannot get DRAM size: %d\n", ret);
|
|
return ret;
|
|
}
|
|
gd->ram_size = ram.size;
|
|
debug("SDRAM base=%lx, size=%lx\n",
|
|
(unsigned long)ram.base, (unsigned long)ram.size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
ulong board_get_usable_ram_top(ulong total_size)
|
|
{
|
|
unsigned long top = CONFIG_SYS_SDRAM_BASE + SDRAM_MAX_SIZE;
|
|
|
|
return (gd->ram_top > top) ? top : gd->ram_top;
|
|
}
|