[PATCH 6/8] lib: sbi_domain: add SBI_DOMAIN_MEMREGION_FW memregion flag

Yu-Chien Peter Lin
2025-08-14T15:37:23Z

Add a new memregion flag, SBI_DOMAIN_MEMREGION_FW and mark the
code and data sections of firmware.

Signed-off-by: Yu-Chien Peter Lin <peter.lin@sifive.com>
---
include/sbi/sbi_domain.h | 1 +
lib/sbi/sbi_domain.c | 8 ++++++--
2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/sbi/sbi_domain.h b/include/sbi/sbi_domain.h
index 8a51f289..d71354c7 100644
--- a/include/sbi/sbi_domain.h
+++ b/include/sbi/sbi_domain.h
@@ -157,6 +157,7 @@ struct sbi_domain_memregion {
SBI_DOMAIN_MEMREGION_M_EXECUTABLE)

#define SBI_DOMAIN_MEMREGION_MMIO (1UL << 31)
+#define SBI_DOMAIN_MEMREGION_FW (1UL << 32)
unsigned long flags;
};

diff --git a/lib/sbi/sbi_domain.c b/lib/sbi/sbi_domain.c
index d6566b12..ccfcc7f0 100644
--- a/lib/sbi/sbi_domain.c
+++ b/lib/sbi/sbi_domain.c
@@ -541,6 +541,8 @@ void sbi_domain_dump(const struct sbi_domain *dom, const char *suffix)
sbi_printf("M: ");
if (reg->flags & SBI_DOMAIN_MEMREGION_MMIO)
sbi_printf("%cI", (k++) ? ',' : '(');
+ if (reg->flags & SBI_DOMAIN_MEMREGION_FW)
+ sbi_printf("%cF", (k++) ? ',' : '(');
if (reg->flags & SBI_DOMAIN_MEMREGION_M_READABLE)
sbi_printf("%cR", (k++) ? ',' : '(');
if (reg->flags & SBI_DOMAIN_MEMREGION_M_WRITABLE)
@@ -894,13 +896,15 @@ int sbi_domain_init(struct sbi_scratch *scratch, u32 cold_hartid)
/* Root domain firmware memory region */
sbi_domain_memregion_init(scratch->fw_start, scratch->fw_rw_offset,
(SBI_DOMAIN_MEMREGION_M_READABLE |
- SBI_DOMAIN_MEMREGION_M_EXECUTABLE),
+ SBI_DOMAIN_MEMREGION_M_EXECUTABLE |
+ SBI_DOMAIN_MEMREGION_FW),
&root_memregs[root_memregs_count++]);

sbi_domain_memregion_init((scratch->fw_start + scratch->fw_rw_offset),
(scratch->fw_size - scratch->fw_rw_offset),
(SBI_DOMAIN_MEMREGION_M_READABLE |
- SBI_DOMAIN_MEMREGION_M_WRITABLE),
+ SBI_DOMAIN_MEMREGION_M_WRITABLE |
+ SBI_DOMAIN_MEMREGION_FW),
&root_memregs[root_memregs_count++]);

root.fw_region_inited = true;