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Refine platform features control

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Allow a platform to report its supported features in more details.
The new features defined are:
* SBI_PLATFORM_HAS_PMP
* SBI_PLATFORM_HAS_SCOUNTEREN
* SBI_PLATFORM_HAS_MCOUNTEREN

In addition, define the macro SBI_PLATFORM_DEFAULT_FEATURES as the set
of features that are generally expected to be supported by a Linux
capable platform.

Operations touching the features controlled with these falgs are not
executed if the platform does not set the corresponding feature flags.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
This commit is contained in:
Damien Le Moal
2018-12-21 09:13:37 +09:00
parent f003787455
commit aa68f0252f
7 changed files with 45 additions and 26 deletions
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2
include/sbi/sbi_hart.h
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@@ -16,7 +16,7 @@ struct sbi_scratch;
int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid);
void sbi_hart_pmp_dump(void);
void sbi_hart_pmp_dump(struct sbi_scratch *scratch);
void __attribute__((noreturn)) sbi_hart_hang(void);