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d8a146d19b
As the OpenSBI v1.2 does not enable the cache [0], we enable
the i/d-cache in harts_early_init() and do not disable in
cleanup_before_linux(). This patch also simplifies the logic
and moves the CSR encoding to include/asm/arch-andes/csr.h.
[0] bd7ef41398
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2023 Andes Technology Corporation
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* Rick Chen, Andes Technology Corporation <rick@andestech.com>
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*/
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/* CPU specific code */
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#include <common.h>
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#include <cpu_func.h>
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#include <irq_func.h>
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#include <asm/cache.h>
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#include <asm/csr.h>
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#include <asm/arch-andes/csr.h>
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/*
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* cleanup_before_linux() is called just before we call linux
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* it prepares the processor for linux
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*
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* we disable interrupt and caches.
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*/
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int cleanup_before_linux(void)
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{
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disable_interrupts();
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cache_flush();
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return 0;
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}
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void harts_early_init(void)
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{
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/* Enable I/D-cache in SPL */
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if (CONFIG_IS_ENABLED(RISCV_MMODE)) {
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unsigned long mcache_ctl_val = csr_read(CSR_MCACHE_CTL);
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mcache_ctl_val |= (MCACHE_CTL_DC_COHEN | MCACHE_CTL_IC_EN |
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MCACHE_CTL_DC_EN | MCACHE_CTL_CCTL_SUEN);
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csr_write(CSR_MCACHE_CTL, mcache_ctl_val);
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/*
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* Check mcache_ctl.DC_COHEN, we assume this platform does
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* not support CM if the bit is hard-wired to 0.
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*/
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if (csr_read(CSR_MCACHE_CTL) & MCACHE_CTL_DC_COHEN) {
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/* Wait for DC_COHSTA bit to be set */
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while (!(csr_read(CSR_MCACHE_CTL) & MCACHE_CTL_DC_COHSTA));
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}
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}
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}
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