[PATCH v4 2/7] lmb: add lmb_is_reserved_flags
Patrick Delaunay
patrick.delaunay at foss.st.com
Fri May 7 14:50:30 CEST 2021
Add a new function lmb_is_reserved_flags to check if
an address is reserved with a specific flags.
This function can be used to check if an address was
reserved with no-map flags with:
lmb_is_reserved_flags(lmb, addr, LMB_NOMAP);
Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>
---
Changes in v4:
- Add comment for lmb_is_reserved_flags and remove extern
- Remove unnecessary !! on return of boolean in lmb_is_reserved_flags
include/lmb.h | 9 +++++++++
lib/lmb.c | 9 +++++++--
2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/include/lmb.h b/include/lmb.h
index e900b3dd65..3c4afdf9f0 100644
--- a/include/lmb.h
+++ b/include/lmb.h
@@ -100,6 +100,15 @@ extern phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base,
phys_size_t size);
extern phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr);
extern int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr);
+/**
+ * lmb_is_reserved_flags - test if tha address is in reserved region with a bitfield flag
+ *
+ * @lmb the logical memory block struct
+ * @addr address to be tested
+ * @flags flags bitfied to be tested
+ * @return 0 if not reserved or reserved without the requested flag else 1
+ */
+int lmb_is_reserved_flags(struct lmb *lmb, phys_addr_t addr, int flags);
extern long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
extern void lmb_dump_all(struct lmb *lmb);
diff --git a/lib/lmb.c b/lib/lmb.c
index 69700bf9ba..a0fb8c7e88 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -443,7 +443,7 @@ phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr)
return 0;
}
-int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
+int lmb_is_reserved_flags(struct lmb *lmb, phys_addr_t addr, int flags)
{
int i;
@@ -451,11 +451,16 @@ int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
phys_addr_t upper = lmb->reserved.region[i].base +
lmb->reserved.region[i].size - 1;
if ((addr >= lmb->reserved.region[i].base) && (addr <= upper))
- return 1;
+ return (lmb->reserved.region[i].flags & flags) == flags;
}
return 0;
}
+int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr)
+{
+ return lmb_is_reserved_flags(lmb, addr, LMB_NONE);
+}
+
__weak void board_lmb_reserve(struct lmb *lmb)
{
/* please define platform specific board_lmb_reserve() */
--
2.17.1
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