forked from Mirrors/opensbi
bf21632860
As per RISC-V privilege specification, a platform may choose to implement a coarser granularity scheme for PMP addresses. In that case, we shouldn't allow any pmp region size smaller than the platform supports. A platform may not also implement all the bits for a PMP address specified in the priv specification. The pmp range granularity and address bits should be detected dynamically before detecing PMP regions. Any pmp modification request beyond these detected value must not succeed. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
57 lines
1.7 KiB
C
57 lines
1.7 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 timer csr implementation in hardware */
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SBI_HART_HAS_TIME = (1 << 2),
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/** Last index of Hart features*/
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SBI_HART_HAS_LAST_FEATURE = SBI_HART_HAS_TIME,
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};
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struct sbi_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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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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