Files
opensbi/platform/generic/thead/thead-generic.c
Yangyu Chen 019a8e69a1 platform: generic: thead: add Canaan Kendryte K230
Canaan Kendryte K230 SoC has T-Head C908 cores inside. The dt-binding has
been merged into the linux kernel [1]. However, it has early version of
C908 core which does not have Sscofpmf and need to use T-Head PMU
extension. Thus, we add a K230 compatible string to thead_generic_match
and set quirk for T-Head PMU.

[1] https://lore.kernel.org/linux-riscv/tencent_4D85743622F39109466913393EE2F6C5980A@qq.com/

Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Reviewed-by: Inochi Amaoto <inochiama@outlook.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2024-05-09 18:10:25 +05:30

63 lines
1.5 KiB
C

/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Authors:
* Inochi Amaoto <inochiama@outlook.com>
*
*/
#include <platform_override.h>
#include <thead/c9xx_errata.h>
#include <thead/c9xx_pmu.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>
struct thead_generic_quirks {
u64 errata;
};
static int thead_generic_early_init(bool cold_boot,
const struct fdt_match *match)
{
struct thead_generic_quirks *quirks = (void *)match->data;
if (quirks->errata & THEAD_QUIRK_ERRATA_TLB_FLUSH)
thead_register_tlb_flush_trap_handler();
return 0;
}
static int thead_generic_extensions_init(const struct fdt_match *match,
struct sbi_hart_features *hfeatures)
{
struct thead_generic_quirks *quirks = (void *)match->data;
if (quirks->errata & THEAD_QUIRK_ERRATA_THEAD_PMU)
thead_c9xx_register_pmu_device();
return 0;
}
static struct thead_generic_quirks thead_th1520_quirks = {
.errata = THEAD_QUIRK_ERRATA_TLB_FLUSH | THEAD_QUIRK_ERRATA_THEAD_PMU,
};
static struct thead_generic_quirks canaan_k230_quirks = {
.errata = THEAD_QUIRK_ERRATA_THEAD_PMU,
};
static const struct fdt_match thead_generic_match[] = {
{ .compatible = "thead,th1520", .data = &thead_th1520_quirks },
{ .compatible = "canaan,kendryte-k230", .data = &canaan_k230_quirks },
{ },
};
const struct platform_override thead_generic = {
.match_table = thead_generic_match,
.early_init = thead_generic_early_init,
.extensions_init = thead_generic_extensions_init,
};