diff options
Diffstat (limited to 'include/lmb.h')
| -rw-r--r-- | include/lmb.h | 129 |
1 files changed, 45 insertions, 84 deletions
diff --git a/include/lmb.h b/include/lmb.h index 231b68b27d9..fc2daaa7bfc 100644 --- a/include/lmb.h +++ b/include/lmb.h @@ -3,8 +3,10 @@ #define _LINUX_LMB_H #ifdef __KERNEL__ +#include <alist.h> #include <asm/types.h> #include <asm/u-boot.h> +#include <linux/bitops.h> /* * Logical memory blocks. @@ -18,115 +20,75 @@ * @LMB_NOMAP: don't add to mmu configuration */ enum lmb_flags { - LMB_NONE = 0x0, - LMB_NOMAP = 0x4, + LMB_NONE = 0, + LMB_NOMAP = BIT(1), + LMB_NOOVERWRITE = BIT(2), }; /** - * struct lmb_property - Description of one region. + * struct lmb_region - Description of one region. * * @base: Base address of the region. * @size: Size of the region * @flags: memory region attributes */ -struct lmb_property { +struct lmb_region { phys_addr_t base; phys_size_t size; enum lmb_flags flags; }; -/* - * For regions size management, see LMB configuration in KConfig - * all the #if test are done with CONFIG_LMB_USE_MAX_REGIONS (boolean) - * - * case 1. CONFIG_LMB_USE_MAX_REGIONS is defined (legacy mode) - * => CONFIG_LMB_MAX_REGIONS is used to configure the region size, - * directly in the array lmb_region.region[], with the same - * configuration for memory and reserved regions. +/** + * struct lmb - The LMB structure * - * case 2. CONFIG_LMB_USE_MAX_REGIONS is not defined, the size of each - * region is configurated *independently* with - * => CONFIG_LMB_MEMORY_REGIONS: struct lmb.memory_regions - * => CONFIG_LMB_RESERVED_REGIONS: struct lmb.reserved_regions - * lmb_region.region is only a pointer to the correct buffer, - * initialized in lmb_init(). This configuration is useful to manage - * more reserved memory regions with CONFIG_LMB_RESERVED_REGIONS. + * @free_mem: List of free memory regions + * @used_mem: List of used/reserved memory regions */ +struct lmb { + struct alist free_mem; + struct alist used_mem; +}; /** - * struct lmb_region - Description of a set of region. + * lmb_init() - Initialise the LMB module + * + * Initialise the LMB lists needed for keeping the memory map. There + * are two lists, in form of alloced list data structure. One for the + * available memory, and one for the used memory. Initialise the two + * lists as part of board init. Add memory to the available memory + * list and reserve common areas by adding them to the used memory + * list. * - * @cnt: Number of regions. - * @max: Size of the region array, max value of cnt. - * @region: Array of the region properties + * Return: 0 on success, -ve on error */ -struct lmb_region { - unsigned long cnt; - unsigned long max; -#if IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS) - struct lmb_property region[CONFIG_LMB_MAX_REGIONS]; -#else - struct lmb_property *region; -#endif -}; +int lmb_init(void); /** - * struct lmb - Logical memory block handle. + * lmb_add_memory() - Add memory range for LMB allocations * - * Clients provide storage for Logical memory block (lmb) handles. - * The content of the structure is managed by the lmb library. - * A lmb struct is initialized by lmb_init() functions. - * The lmb struct is passed to all other lmb APIs. + * Add the entire available memory range to the pool of memory that + * can be used by the LMB module for allocations. * - * @memory: Description of memory regions. - * @reserved: Description of reserved regions. - * @memory_regions: Array of the memory regions (statically allocated) - * @reserved_regions: Array of the reserved regions (statically allocated) + * Return: None */ -struct lmb { - struct lmb_region memory; - struct lmb_region reserved; -#if !IS_ENABLED(CONFIG_LMB_USE_MAX_REGIONS) - struct lmb_property memory_regions[CONFIG_LMB_MEMORY_REGIONS]; - struct lmb_property reserved_regions[CONFIG_LMB_RESERVED_REGIONS]; -#endif -}; +void lmb_add_memory(void); -void lmb_init(struct lmb *lmb); -void lmb_init_and_reserve(struct lmb *lmb, struct bd_info *bd, void *fdt_blob); -void lmb_init_and_reserve_range(struct lmb *lmb, phys_addr_t base, - phys_size_t size, void *fdt_blob); -long lmb_add(struct lmb *lmb, phys_addr_t base, phys_size_t size); -long lmb_reserve(struct lmb *lmb, phys_addr_t base, phys_size_t size); +long lmb_add(phys_addr_t base, phys_size_t size); +long lmb_reserve(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); -phys_addr_t lmb_alloc(struct lmb *lmb, phys_size_t size, ulong align); -phys_addr_t lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, - phys_addr_t max_addr); -phys_addr_t __lmb_alloc_base(struct lmb *lmb, phys_size_t size, ulong align, - phys_addr_t max_addr); -phys_addr_t lmb_alloc_addr(struct lmb *lmb, phys_addr_t base, phys_size_t size); -phys_size_t lmb_get_free_size(struct lmb *lmb, phys_addr_t addr); - -/** - * lmb_is_reserved() - test if address is in reserved region - * - * The function checks if a reserved region comprising @addr exists. - * - * @lmb: the logical memory block struct - * @addr: address to be tested - * Return: 1 if reservation exists, 0 otherwise - */ -int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr); +long lmb_reserve_flags(phys_addr_t base, phys_size_t size, + enum lmb_flags flags); +phys_addr_t lmb_alloc(phys_size_t size, ulong align); +phys_addr_t lmb_alloc_base(phys_size_t size, ulong align, phys_addr_t max_addr); +phys_addr_t lmb_alloc_addr(phys_addr_t base, phys_size_t size); +phys_size_t lmb_get_free_size(phys_addr_t addr); /** * lmb_is_reserved_flags() - test if address is in reserved region with flag bits set @@ -134,21 +96,20 @@ int lmb_is_reserved(struct lmb *lmb, phys_addr_t addr); * The function checks if a reserved region comprising @addr exists which has * all flag bits set which are set in @flags. * - * @lmb: the logical memory block struct * @addr: address to be tested * @flags: bitmap with bits to be tested * Return: 1 if matching reservation exists, 0 otherwise */ -int lmb_is_reserved_flags(struct lmb *lmb, phys_addr_t addr, int flags); +int lmb_is_reserved_flags(phys_addr_t addr, int flags); -long lmb_free(struct lmb *lmb, phys_addr_t base, phys_size_t size); +long lmb_free(phys_addr_t base, phys_size_t size); -void lmb_dump_all(struct lmb *lmb); -void lmb_dump_all_force(struct lmb *lmb); +void lmb_dump_all(void); +void lmb_dump_all_force(void); -void board_lmb_reserve(struct lmb *lmb); -void arch_lmb_reserve(struct lmb *lmb); -void arch_lmb_reserve_generic(struct lmb *lmb, ulong sp, ulong end, ulong align); +struct lmb *lmb_get(void); +int lmb_push(struct lmb *store); +void lmb_pop(struct lmb *store); #endif /* __KERNEL__ */ |