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lib: sbi: Add functions to map/unmap shared memory

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When Smepmp is enabled, M-mode will need to map/unmap the
shared memory before it can read/write to it. This patch
adds functions to create dynamic short-lived mappings.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Himanshu Chauhan
2023-07-12 10:04:35 +05:30
committed by Anup Patel
parent 5dd8db5b10
commit 6e44ef686a
2 changed files with 44 additions and 0 deletions
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include/sbi/sbi_hart.h
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@@ -90,6 +90,8 @@ unsigned long sbi_hart_pmp_granularity(struct sbi_scratch *scratch);
unsigned int sbi_hart_pmp_addrbits(struct sbi_scratch *scratch);
unsigned int sbi_hart_mhpm_bits(struct sbi_scratch *scratch);
int sbi_hart_pmp_configure(struct sbi_scratch *scratch);
int sbi_hart_map_saddr(unsigned long base, unsigned long size);
int sbi_hart_unmap_saddr(void);
int sbi_hart_priv_version(struct sbi_scratch *scratch);
void sbi_hart_get_priv_version_str(struct sbi_scratch *scratch,
char *version_str, int nvstr);