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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2022 StarFive Technology Co., Ltd.
* Author: Yanhong Wang<yanhong.wang@starfivetech.com>
*/
#include <common.h>
#include <asm/arch/eeprom.h>
#include <asm/csr.h>
#include <asm/sections.h>
#include <dm.h>
#include <linux/sizes.h>
#include <log.h>
#include <init.h>
#define CSR_U74_FEATURE_DISABLE 0x7c1
#define L2_LIM_MEM_END 0x81FFFFFUL
DECLARE_GLOBAL_DATA_PTR;
static bool check_ddr_size(phys_size_t size)
{
switch (size) {
case SZ_2:
case SZ_4:
case SZ_8:
case SZ_16:
return true;
default:
return false;
}
}
int spl_soc_init(void)
{
int ret;
struct udevice *dev;
phys_size_t size;
ret = fdtdec_setup_mem_size_base();
if (ret)
return ret;
/* Read the definition of the DDR size from eeprom, and if not,
* use the definition in DT
*/
size = (get_ddr_size_from_eeprom() >> 16) & 0xFF;
if (check_ddr_size(size))
gd->ram_size = size << 30;
/* DDR init */
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret) {
debug("DRAM init failed: %d\n", ret);
return ret;
}
return 0;
}
void harts_early_init(void)
{
ulong *ptr;
u8 *tmp;
ulong len, remain;
/*
* Feature Disable CSR
*
* Clear feature disable CSR to '0' to turn on all features for
* each core. This operation must be in M-mode.
*/
if (CONFIG_IS_ENABLED(RISCV_MMODE))
csr_write(CSR_U74_FEATURE_DISABLE, 0);
/* clear L2 LIM memory
* set __bss_end to 0x81FFFFF region to zero
* The L2 Cache Controller supports ECC. ECC is applied to SRAM.
* If it is not cleared, the ECC part is invalid, and an ECC error
* will be reported when reading data.
*/
ptr = (ulong *)__bss_end;
len = L2_LIM_MEM_END - (ulong)__bss_end;
remain = len % sizeof(ulong);
len /= sizeof(ulong);
while (len--)
*ptr++ = 0;
/* clear the remain bytes */
if (remain) {
tmp = (u8 *)ptr;
while (remain--)
*tmp++ = 0;
}
}
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