u-boot/board/imgtec/boston/ddr.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2016 Imagination Technologies
 */

#include <common.h>
#include <init.h>

#include <asm/io.h>

#include "boston-regs.h"

DECLARE_GLOBAL_DATA_PTR;

int dram_init(void)
{
	u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0);

	gd->ram_size = (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) <<
			30;

	return 0;
}

ulong board_get_usable_ram_top(ulong total_size)
{
	DECLARE_GLOBAL_DATA_PTR;

	if (gd->ram_top < CONFIG_SYS_SDRAM_BASE) {
		/* 2GB wrapped around to 0 */
		return CKSEG0ADDR(256 << 20);
	}

	return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20));
}
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-06 21:58:06 +00:00			`// SPDX-License-Identifier: GPL-2.0`
boston: Introduce support for the MIPS Boston development board This patch introduces support for building U-Boot to run on the MIPS Boston development board. This is a board built around an FPGA & an Intel EG20T Platform Controller Hub, used largely as part of the development of new CPUs and their software support. It is essentially the successor to the older MIPS Malta board. Signed-off-by: Paul Burton <paul.burton@imgtec.com> 2016-09-08 06:47:39 +00:00			`/*`
			`* Copyright (C) 2016 Imagination Technologies`
			`*/`

			`#include <common.h>`
common: Move board_get_usable_ram_top() out of common.h Move this function into init.h which seems to be designed for this sort of thing. Also update the header to declare struct global_data so that it can be included without global_data.h being needed. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com> 2019-11-14 19:57:45 +00:00			`#include <init.h>`
boston: Introduce support for the MIPS Boston development board This patch introduces support for building U-Boot to run on the MIPS Boston development board. This is a board built around an FPGA & an Intel EG20T Platform Controller Hub, used largely as part of the development of new CPUs and their software support. It is essentially the successor to the older MIPS Malta board. Signed-off-by: Paul Burton <paul.burton@imgtec.com> 2016-09-08 06:47:39 +00:00
			`#include <asm/io.h>`

			`#include "boston-regs.h"`

board_f: Drop return value from initdram() At present we cannot use this function as an init sequence call without a wrapper, since it returns the RAM size. Adjust it to set the RAM size in global_data instead, and return 0 on success. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Stefan Roese <sr@denx.de> 2017-03-31 14:40:25 +00:00			`DECLARE_GLOBAL_DATA_PTR;`

board_f: Rename initdram() to dram_init() This allows us to use the same DRAM init function on all archs. Add a dummy function for arc, which does not use DRAM init here. Signed-off-by: Simon Glass <sjg@chromium.org> [trini: Dummy function on nios2] Signed-off-by: Tom Rini <trini@konsulko.com> 2017-04-06 18:47:05 +00:00			`int dram_init(void)`
boston: Introduce support for the MIPS Boston development board This patch introduces support for building U-Boot to run on the MIPS Boston development board. This is a board built around an FPGA & an Intel EG20T Platform Controller Hub, used largely as part of the development of new CPUs and their software support. It is essentially the successor to the older MIPS Malta board. Signed-off-by: Paul Burton <paul.burton@imgtec.com> 2016-09-08 06:47:39 +00:00			`{`
			`u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0);`

board_f: Drop return value from initdram() At present we cannot use this function as an init sequence call without a wrapper, since it returns the RAM size. Adjust it to set the RAM size in global_data instead, and return 0 on success. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Stefan Roese <sr@denx.de> 2017-03-31 14:40:25 +00:00			`gd->ram_size = (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) <<`
			`30;`

			`return 0;`
boston: Introduce support for the MIPS Boston development board This patch introduces support for building U-Boot to run on the MIPS Boston development board. This is a board built around an FPGA & an Intel EG20T Platform Controller Hub, used largely as part of the development of new CPUs and their software support. It is essentially the successor to the older MIPS Malta board. Signed-off-by: Paul Burton <paul.burton@imgtec.com> 2016-09-08 06:47:39 +00:00			`}`

			`ulong board_get_usable_ram_top(ulong total_size)`
			`{`
			`DECLARE_GLOBAL_DATA_PTR;`

			`if (gd->ram_top < CONFIG_SYS_SDRAM_BASE) {`
			`/* 2GB wrapped around to 0 */`
			`return CKSEG0ADDR(256 << 20);`
			`}`

			`return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20));`
			`}`