mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-16 16:23:14 +00:00
67c4e9f815
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>
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <init.h>
|
|
#include <asm/post.h>
|
|
#include <asm/arch/qemu.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
u32 qemu_get_low_memory_size(void)
|
|
{
|
|
u32 ram;
|
|
|
|
outb(HIGH_RAM_ADDR, CMOS_ADDR_PORT);
|
|
ram = ((u32)inb(CMOS_DATA_PORT)) << 14;
|
|
outb(LOW_RAM_ADDR, CMOS_ADDR_PORT);
|
|
ram |= ((u32)inb(CMOS_DATA_PORT)) << 6;
|
|
ram += 16 * 1024;
|
|
|
|
return ram * 1024;
|
|
}
|
|
|
|
u64 qemu_get_high_memory_size(void)
|
|
{
|
|
u64 ram;
|
|
|
|
outb(HIGH_HIGHRAM_ADDR, CMOS_ADDR_PORT);
|
|
ram = ((u64)inb(CMOS_DATA_PORT)) << 22;
|
|
outb(MID_HIGHRAM_ADDR, CMOS_ADDR_PORT);
|
|
ram |= ((u64)inb(CMOS_DATA_PORT)) << 14;
|
|
outb(LOW_HIGHRAM_ADDR, CMOS_ADDR_PORT);
|
|
ram |= ((u64)inb(CMOS_DATA_PORT)) << 6;
|
|
|
|
return ram * 1024;
|
|
}
|
|
|
|
int dram_init(void)
|
|
{
|
|
gd->ram_size = qemu_get_low_memory_size();
|
|
gd->ram_size += qemu_get_high_memory_size();
|
|
post_code(POST_DRAM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dram_init_banksize(void)
|
|
{
|
|
u64 high_mem_size;
|
|
|
|
gd->bd->bi_dram[0].start = 0;
|
|
gd->bd->bi_dram[0].size = qemu_get_low_memory_size();
|
|
|
|
high_mem_size = qemu_get_high_memory_size();
|
|
if (high_mem_size) {
|
|
gd->bd->bi_dram[1].start = SZ_4G;
|
|
gd->bd->bi_dram[1].size = high_mem_size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function looks for the highest region of memory lower than 4GB which
|
|
* has enough space for U-Boot where U-Boot is aligned on a page boundary.
|
|
* It overrides the default implementation found elsewhere which simply
|
|
* picks the end of ram, wherever that may be. The location of the stack,
|
|
* the relocation address, and how far U-Boot is moved by relocation are
|
|
* set in the global data structure.
|
|
*/
|
|
ulong board_get_usable_ram_top(ulong total_size)
|
|
{
|
|
return qemu_get_low_memory_size();
|
|
}
|