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| author | Patrick Delaunay <patrick.delaunay@foss.st.com> | 2021-05-07 14:50:29 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-06-07 10:48:40 -0400 |
| commit | 59c0ea5df33fc4d9b62226d29e3b5c61d639303f (patch) | |
| tree | 0e9a9f4f5036d537fa01ee598f49045ad50661ab /include/lmb.h | |
| parent | e3b64beda5dd1a6b6bedfd1fe0e50be1ddea7044 (diff) | |
| download | u-boot-59c0ea5df33fc4d9b62226d29e3b5c61d639303f.tar.gz u-boot-59c0ea5df33fc4d9b62226d29e3b5c61d639303f.tar.bz2 u-boot-59c0ea5df33fc4d9b62226d29e3b5c61d639303f.zip | |
lmb: Add support of flags for no-map properties
Add "flags" in lmb_property to save the "no-map" property of
reserved region and a new function lmb_reserve_flags() to check
this flag.
The default allocation use flags = LMB_NONE.
The adjacent reserved memory region are merged only when they have
the same flags value.
This patch is partially based on flags support done in Linux kernel
mm/memblock .c (previously lmb.c); it is why LMB_NOMAP = 0x4, it is
aligned with MEMBLOCK_NOMAP value.
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/lmb.h')
| -rw-r--r-- | include/lmb.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/lmb.h b/include/lmb.h index 541e17093c..e900b3dd65 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -13,6 +13,16 @@ */ /** + * enum lmb_flags - definition of memory region attributes + * @LMB_NONE: no special request + * @LMB_NOMAP: don't add to mmu configuration + */ +enum lmb_flags { + LMB_NONE = 0x0, + LMB_NOMAP = 0x4, +}; + +/** * struct lmb_property - Description of one region. * * @base: Base address of the region. @@ -21,6 +31,7 @@ struct lmb_property { phys_addr_t base; phys_size_t size; + enum lmb_flags flags; }; /** @@ -69,6 +80,17 @@ extern void lmb_init_and_reserve_range(struct lmb *lmb, phys_addr_t base, phys_size_t size, void *fdt_blob); extern long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size); extern long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size); +/** + * lmb_reserve_flags - Reserve one region with a specific flags bitfield. + * + * @lmb the logical memory block struct + * @base base address of the memory region + * @size size of the memory region + * @flags flags for the memory region + * @return 0 if OK, > 0 for coalesced region or a negative error code. + */ +long lmb_reserve_flags(struct lmb *lmb, phys_addr_t base, + phys_size_t size, enum lmb_flags flags); extern phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align); extern phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, phys_addr_t max_addr); @@ -92,6 +114,13 @@ lmb_size_bytes(struct lmb_region *type, unsigned long region_nr) void board_lmb_reserve(struct lmb *lmb); void arch_lmb_reserve(struct lmb *lmb); +/* Low level functions */ + +static inline bool lmb_is_nomap(struct lmb_property *m) +{ + return m->flags & LMB_NOMAP; +} + #endif /* __KERNEL__ */ #endif /* _LINUX_LMB_H */ |