gardenia/loader/io.c
hydrogenium2020 ce26824ed9 feat:SDRAM:bring up for 4GB DDR3L H5TC4G63AFR-RDA 792Mhz!
Here is the detail:
1. It has 2Ranks and 8bit*8.
2. There are some differences between H5TC4G63AFR-RDA and H5TC4G63AFR-PBA, and the parameters are not universal. If mixed use, it may lead to unstable data in memory writing (for example, data loss during writing).
2024-02-11 14:49:57 +08:00

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937 B
C

/*
* Copyright (c) 2024 hydrogenium2020-offical
* Copyright 2014 Google Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include "types.h"
u32 read32(u32 *addr)
{
return *(vu32 *)addr;
}
void write32(u32 *addr, u32 val)
{
*(vu32 *)addr = val;
}
void setbits32(u32 *addr,u32 bits)
{
write32(addr, read32(addr) | bits);
}
void clrbits32(u32 *addr,u32 bits)
{
write32(addr, read32(addr) & ~bits);
}
void clrsetbits32(u32 *addr,u32 mask, u32 value)
{
write32(addr,(read32(addr) & ~((u32)(mask))) | (value));
}