diff options
Diffstat (limited to 'include/lmb.h')
| -rw-r--r-- | include/lmb.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/lmb.h b/include/lmb.h index 541e17093c..3c4afdf9f0 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); @@ -78,6 +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); @@ -92,6 +123,13 @@ 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 */ |