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platform: generic: thead: separate implement of T-HEAD c9xx errata

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Separate the implement of T-HEAD c9xx errata to allow any platform
with bug related to c9xx cores can use it.

Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Inochi Amaoto
2023-10-07 11:06:30 +08:00
committed by Anup Patel
parent 8e941e7fe3
commit 492d9b153d
7 changed files with 49 additions and 18 deletions
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4
platform/generic/thead/Kconfig
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@@ -3,3 +3,7 @@
config THEAD_C9XX_PMU
bool "T-HEAD c9xx M-mode PMU support"
default n
config THEAD_C9XX_ERRATA
bool "T-HEAD c9xx errata support"
default n

4
platform/generic/thead/objects.mk
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@@ -7,6 +7,8 @@
platform-objs-$(CONFIG_THEAD_C9XX_PMU) += thead/thead_c9xx_pmu.o
platform-objs-$(CONFIG_THEAD_C9XX_ERRATA) += thead/thead_c9xx_tlb_trap_handler.o
platform-objs-$(CONFIG_THEAD_C9XX_ERRATA) += thead/thead_c9xx_errata_tlb_flush.o
carray-platform_override_modules-$(CONFIG_PLATFORM_THEAD) += thead_generic
platform-objs-$(CONFIG_PLATFORM_THEAD) += thead/thead-generic.o
platform-objs-$(CONFIG_PLATFORM_THEAD) += thead/thead-trap-handler.o

28
platform/generic/thead/thead-generic.c
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@@ -7,40 +7,34 @@
*/
#include <platform_override.h>
#include <sbi/riscv_barrier.h>
#include <thead/c9xx_errata.h>
#include <sbi/sbi_const.h>
#include <sbi/sbi_platform.h>
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_string.h>
#include <sbi_utils/fdt/fdt_helper.h>
/**
* T-HEAD board with this quirk need to execute sfence.vma to flush
* stale entrie avoid incorrect memory access.
*/
#define THEAD_QUIRK_TLB_FLUSH_FIXUP BIT(0)
void _thead_tlb_flush_fixup_trap_handler(void);
void thead_register_tlb_flush_trap_handler(void)
{
csr_write(CSR_MTVEC, &_thead_tlb_flush_fixup_trap_handler);
}
struct thead_generic_quirks {
u64 errata;
};
static int thead_generic_early_init(bool cold_boot,
const struct fdt_match *match)
{
unsigned long quirks = (unsigned long)match->data;
struct thead_generic_quirks *quirks = (void *)match->data;
if (quirks & THEAD_QUIRK_TLB_FLUSH_FIXUP)
if (quirks->errata & THEAD_QUIRK_ERRATA_TLB_FLUSH)
thead_register_tlb_flush_trap_handler();
return 0;
}
static struct thead_generic_quirks thead_th1520_quirks = {
.errata = THEAD_QUIRK_ERRATA_TLB_FLUSH,
};
static const struct fdt_match thead_generic_match[] = {
{ .compatible = "thead,th1520",
.data = (void*)THEAD_QUIRK_TLB_FLUSH_FIXUP },
{ .compatible = "thead,th1520", .data = &thead_th1520_quirks },
{ },
};

17
platform/generic/thead/thead_c9xx_errata_tlb_flush.c Normal file
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@@ -0,0 +1,17 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Authors:
* Inochi Amaoto <inochiama@outlook.com>
*
*/
#include <sbi/riscv_encoding.h>
#include <sbi/riscv_asm.h>
void _thead_tlb_flush_fixup_trap_handler(void);
void thead_register_tlb_flush_trap_handler(void)
{
csr_write(CSR_MTVEC, &_thead_tlb_flush_fixup_trap_handler);
}

0
platform/generic/thead/thead-trap-handler.S → platform/generic/thead/thead_c9xx_tlb_trap_handler.S
View File