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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2023 Andes Technology Corporation
* Rick Chen, Andes Technology Corporation <rick@andestech.com>
*/
/* CPU specific code */
#include <cpu_func.h>
#include <irq_func.h>
#include <asm/cache.h>
#include <asm/csr.h>
#include <asm/arch-andes/csr.h>
/*
* cleanup_before_linux() is called just before we call linux
* it prepares the processor for linux
*
* we disable interrupt and caches.
*/
int cleanup_before_linux(void)
{
disable_interrupts();
cache_flush();
return 0;
}
void harts_early_init(void)
{
/* Enable I/D-cache in SPL */
if (CONFIG_IS_ENABLED(RISCV_MMODE)) {
unsigned long mcache_ctl_val = csr_read(CSR_MCACHE_CTL);
unsigned long mmisc_ctl_val = csr_read(CSR_MMISC_CTL);
mcache_ctl_val |= (MCACHE_CTL_CCTL_SUEN | \
MCACHE_CTL_IC_PREFETCH_EN | MCACHE_CTL_DC_PREFETCH_EN | \
MCACHE_CTL_DC_WAROUND_EN | MCACHE_CTL_L2C_WAROUND_EN | \
MCACHE_CTL_IC_ECCEN | MCACHE_CTL_DC_ECCEN | MCACHE_CTL_TLB_ECCEN);
if (!CONFIG_IS_ENABLED(SYS_ICACHE_OFF))
mcache_ctl_val |= MCACHE_CTL_IC_EN;
if (!CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
mcache_ctl_val |= (MCACHE_CTL_DC_EN | MCACHE_CTL_DC_COHEN);
csr_write(CSR_MCACHE_CTL, mcache_ctl_val);
if (!CONFIG_IS_ENABLED(SYS_DCACHE_OFF)) {
/*
* Check mcache_ctl.DC_COHEN, we assume this platform does
* not support CM if the bit is hard-wired to 0.
*/
if (csr_read(CSR_MCACHE_CTL) & MCACHE_CTL_DC_COHEN) {
/* Wait for DC_COHSTA bit to be set */
while (!(csr_read(CSR_MCACHE_CTL) & MCACHE_CTL_DC_COHSTA));
}
}
mmisc_ctl_val |= MMISC_CTL_NON_BLOCKING_EN;
csr_write(CSR_MMISC_CTL, mmisc_ctl_val);
}
}
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