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u-boot/arch/arm/cpu/armv7/sunxi/sram.c

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sunxi: move early "SRAM setup" into separate file Currently we do some magic "SRAM setup" MMIO writes in s_init(), copied from the original BSP U-Boot. The comment speaks of this being required before DRAM access gets enabled, but there is no indication that this would actually be required that early. Move this out of s_init(), into board_init_f(). Since this actually only affects a very few older SoCs, the actual code goes into the cpu/armv7 directory, to move it out of the way for all other SoCs. This also uses the opportunity to convert some #ifdefs over to the fancy IS_ENABLED() macros used in actual C code. We keep the s_init() stub around for now, since armv8's lowlevel_init still relies on it. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
2022-01-23 00:28:43 +00:00
// 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>
sunxi: refactor serial base addresses to avoid asm/arch/cpu.h At the moment we have each SoC's memory map defined in its own cpu.h, which is included in include/configs/sunxi_common.h. This will be a problem with the introduction of Allwinner RISC-V support. Remove the inclusion of that header file from the common config header, instead move the required serial base addresses (for the SPL) into a separate header file. Then include the original cpu.h file only where we really need it, which is only under arch/arm now. This disentangles the architecture specific header files from the generic code. Signed-off-by: Andre Przywara <andre.przywara@arm.com>
2022-07-02 23:14:24 +00:00
#include <asm/arch/cpu.h>
sunxi: move early "SRAM setup" into separate file Currently we do some magic "SRAM setup" MMIO writes in s_init(), copied from the original BSP U-Boot. The comment speaks of this being required before DRAM access gets enabled, but there is no indication that this would actually be required that early. Move this out of s_init(), into board_init_f(). Since this actually only affects a very few older SoCs, the actual code goes into the cpu/armv7 directory, to move it out of the way for all other SoCs. This also uses the opportunity to convert some #ifdefs over to the fancy IS_ENABLED() macros used in actual C code. We keep the s_init() stub around for now, since armv8's lowlevel_init still relies on it. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
2022-01-23 00:28:43 +00:00
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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