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lmb: add lmb_is_reserved_flags

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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@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-05-07 14:50:30 +02:00 • committed by Tom Rini
parent 59c0ea5df3
commit e359a4a5c1
2 changed files with 16 additions and 2 deletions
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9
include/lmb.h
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@ -100,6 +100,15 @@ extern phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base,
phys_size_t size); phys_size_t size);
extern phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr); 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); 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 long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size);
extern void lmb_dump_all(struct lmb *lmb); extern void lmb_dump_all(struct lmb *lmb);

9
lib/lmb.c
View file

@ -443,7 +443,7 @@ phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr)
return 0; 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; 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 + phys_addr_t upper = lmb->reserved.region[i].base +
lmb->reserved.region[i].size - 1; lmb->reserved.region[i].size - 1;
if ((addr >= lmb->reserved.region[i].base) && (addr <= upper)) if ((addr >= lmb->reserved.region[i].base) && (addr <= upper))
return 1; return (lmb->reserved.region[i].flags & flags) == flags;
} }
return 0; 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) __weak void board_lmb_reserve(struct lmb *lmb)
{ {
/* please define platform specific board_lmb_reserve() */ /* please define platform specific board_lmb_reserve() */