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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net>
*
* (C) Copyright 2007-2011
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
* Tom Cubie <tangliang@allwinnertech.com>
*
* SRAM init for older sunxi SoCs.
*/
#include <common.h>
#include <init.h>
#include <asm/io.h>
void sunxi_sram_init(void)
{
/*
* Undocumented magic taken from boot0, without this DRAM
* access gets messed up (seems cache related).
* The boot0 sources describe this as: "config ema for cache sram"
* Newer SoCs (A83T, H3 and anything beyond) don't need this anymore.
*/
if (IS_ENABLED(CONFIG_MACH_SUN6I))
setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800);
if (IS_ENABLED(CONFIG_MACH_SUN8I)) {
uint version = sunxi_get_sram_id();
if (IS_ENABLED(CONFIG_MACH_SUN8I_A23)) {
if (version == 0x1650)
setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800);
else /* 0x1661 ? */
setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0xc0);
} else if (IS_ENABLED(CONFIG_MACH_SUN8I_A33)) {
if (version != 0x1667)
setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0xc0);
}
}
}
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