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34 #ifndef _RTE_MEMORY_H_
35 #define _RTE_MEMORY_H_
40 * Memory-related RTE API.
46 #ifdef RTE_EXEC_ENV_LINUXAPP
47 #include <exec-env/rte_dom0_common.h>
55 RTE_PGSIZE_4K = 1 << 12,
56 RTE_PGSIZE_2M = RTE_PGSIZE_4K << 9,
57 RTE_PGSIZE_1G = RTE_PGSIZE_2M <<9
60 #define SOCKET_ID_ANY -1 /**< Any NUMA socket. */
61 #ifndef CACHE_LINE_SIZE
62 #define CACHE_LINE_SIZE 64 /**< Cache line size. */
64 #define CACHE_LINE_MASK (CACHE_LINE_SIZE-1) /**< Cache line mask. */
66 #define CACHE_LINE_ROUNDUP(size) \
67 (CACHE_LINE_SIZE * ((size + CACHE_LINE_SIZE - 1) / CACHE_LINE_SIZE))
68 /**< Return the first cache-aligned value greater or equal to size. */
71 * Force alignment to cache line.
73 #define __rte_cache_aligned __attribute__((__aligned__(CACHE_LINE_SIZE)))
75 typedef uint64_t phys_addr_t; /**< Physical address definition. */
76 #define RTE_BAD_PHYS_ADDR ((phys_addr_t)-1)
79 * Physical memory segment descriptor.
82 phys_addr_t phys_addr; /**< Start physical address. */
84 void *addr; /**< Start virtual address. */
85 uint64_t addr_64; /**< Makes sure addr is always 64 bits */
87 #ifdef RTE_LIBRTE_IVSHMEM
88 phys_addr_t ioremap_addr; /**< Real physical address inside the VM */
90 size_t len; /**< Length of the segment. */
91 size_t hugepage_sz; /**< The pagesize of underlying memory */
92 int32_t socket_id; /**< NUMA socket ID. */
93 uint32_t nchannel; /**< Number of channels. */
94 uint32_t nrank; /**< Number of ranks. */
95 #ifdef RTE_LIBRTE_XEN_DOM0
96 /**< store segment MFNs */
97 uint64_t mfn[DOM0_NUM_MEMBLOCK];
99 } __attribute__((__packed__));
102 * Lock page in physical memory and prevent from swapping.
105 * The virtual address.
107 * 0 on success, negative on error.
109 int rte_mem_lock_page(const void *virt);
112 * Get physical address of any mapped virtual address in the current process.
113 * It is found by browsing the /proc/self/pagemap special file.
114 * The page must be locked.
117 * The virtual address.
119 * The physical address or RTE_BAD_PHYS_ADDR on error.
121 phys_addr_t rte_mem_virt2phy(const void *virt);
124 * Get the layout of the available physical memory.
126 * It can be useful for an application to have the full physical
127 * memory layout to decide the size of a memory zone to reserve. This
128 * table is stored in rte_config (see rte_eal_get_configuration()).
131 * - On success, return a pointer to a read-only table of struct
132 * rte_physmem_desc elements, containing the layout of all
133 * addressable physical memory. The last element of the table
134 * contains a NULL address.
135 * - On error, return NULL. This should not happen since it is a fatal
136 * error that will probably cause the entire system to panic.
138 const struct rte_memseg *rte_eal_get_physmem_layout(void);
141 * Dump the physical memory layout to the console.
143 void rte_dump_physmem_layout(void);
146 * Get the total amount of available physical memory.
149 * The total amount of available physical memory in bytes.
151 uint64_t rte_eal_get_physmem_size(void);
154 * Get the number of memory channels.
157 * The number of memory channels on the system. The value is 0 if unknown
158 * or not the same on all devices.
160 unsigned rte_memory_get_nchannel(void);
163 * Get the number of memory ranks.
166 * The number of memory ranks on the system. The value is 0 if unknown or
167 * not the same on all devices.
169 unsigned rte_memory_get_nrank(void);
171 #ifdef RTE_LIBRTE_XEN_DOM0
173 * Return the physical address of elt, which is an element of the pool mp.
176 * The mempool is from which memory segment.
178 * physical address of elt.
181 * The physical address or error.
183 phys_addr_t rte_mem_phy2mch(uint32_t memseg_id, const phys_addr_t phy_addr);
186 * Memory init for supporting application running on Xen domain0.
194 int rte_xen_dom0_memory_init(void);
197 * Attach to memory setments of primary process on Xen domain0.
205 int rte_xen_dom0_memory_attach(void);
211 #endif /* _RTE_MEMORY_H_ */