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https://github.com/riscv-software-src/opensbi.git
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31fecad46d
We add the menvcfg CSR as a HART feature and detect it at boot time using traping mechanism. Signed-off-by: Atish Patra <atishp@rivosinc.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Xiang W <wxjstz@126.com>
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*/
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#ifndef __SBI_HART_H__
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#define __SBI_HART_H__
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#include <sbi/sbi_types.h>
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/** Possible feature flags of a hart */
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enum sbi_hart_features {
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/** Hart has S-mode counter enable */
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SBI_HART_HAS_SCOUNTEREN = (1 << 0),
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/** Hart has M-mode counter enable */
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SBI_HART_HAS_MCOUNTEREN = (1 << 1),
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/** Hart has counter inhibit CSR */
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SBI_HART_HAS_MCOUNTINHIBIT = (1 << 2),
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/** Hart has sscofpmf extension */
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SBI_HART_HAS_SSCOFPMF = (1 << 3),
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/** HART has timer csr implementation in hardware */
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SBI_HART_HAS_TIME = (1 << 4),
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/** HART has AIA local interrupt CSRs */
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SBI_HART_HAS_AIA = (1 << 5),
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/** HART has menvcfg CSR */
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SBI_HART_HAS_MENVCFG = (1 << 6),
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/** Last index of Hart features*/
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SBI_HART_HAS_LAST_FEATURE = SBI_HART_HAS_MENVCFG,
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};
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struct sbi_scratch;
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int sbi_hart_reinit(struct sbi_scratch *scratch);
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int sbi_hart_init(struct sbi_scratch *scratch, bool cold_boot);
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extern void (*sbi_hart_expected_trap)(void);
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static inline ulong sbi_hart_expected_trap_addr(void)
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{
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return (ulong)sbi_hart_expected_trap;
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}
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unsigned int sbi_hart_mhpm_count(struct sbi_scratch *scratch);
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void sbi_hart_delegation_dump(struct sbi_scratch *scratch,
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const char *prefix, const char *suffix);
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unsigned int sbi_hart_pmp_count(struct sbi_scratch *scratch);
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unsigned long sbi_hart_pmp_granularity(struct sbi_scratch *scratch);
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unsigned int sbi_hart_pmp_addrbits(struct sbi_scratch *scratch);
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unsigned int sbi_hart_mhpm_bits(struct sbi_scratch *scratch);
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int sbi_hart_pmp_configure(struct sbi_scratch *scratch);
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bool sbi_hart_has_feature(struct sbi_scratch *scratch, unsigned long feature);
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void sbi_hart_get_features_str(struct sbi_scratch *scratch,
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char *features_str, int nfstr);
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void __attribute__((noreturn)) sbi_hart_hang(void);
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void __attribute__((noreturn))
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sbi_hart_switch_mode(unsigned long arg0, unsigned long arg1,
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unsigned long next_addr, unsigned long next_mode,
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bool next_virt);
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#endif
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