35 static int check_offs_len(struct mtd_info *mtd, loff_t ofs, uint64_t len)  in check_offs_len()  argument
40 	if (mtd_mod_by_eb(ofs, mtd)) {  in check_offs_len()
46 	if (mtd_mod_by_eb(len, mtd)) {  in check_offs_len()
54 static int ram_erase(struct mtd_info *mtd, struct erase_info *instr)  in ram_erase()  argument
56 	if (check_offs_len(mtd, instr->addr, instr->len))  in ram_erase()
58 	memset((char *)mtd->priv + instr->addr, 0xff, instr->len);  in ram_erase()
64 static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,  in ram_point()  argument
67 	*virt = mtd->priv + from;  in ram_point()
72 static int ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)  in ram_unpoint()  argument
82 static unsigned long ram_get_unmapped_area(struct mtd_info *mtd,  in ram_get_unmapped_area()  argument
87 	return (unsigned long) mtd->priv + offset;  in ram_get_unmapped_area()
90 static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,  in ram_read()  argument
93 	memcpy(buf, mtd->priv + from, len);  in ram_read()
98 static int ram_write(struct mtd_info *mtd, loff_t to, size_t len,  in ram_write()  argument
101 	memcpy((char *)mtd->priv + to, buf, len);  in ram_write()
115 int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,  in mtdram_init_device()  argument
118 	memset(mtd, 0, sizeof(*mtd));  in mtdram_init_device()
121 	mtd->name = name;  in mtdram_init_device()
122 	mtd->type = MTD_RAM;  in mtdram_init_device()
123 	mtd->flags = MTD_CAP_RAM;  in mtdram_init_device()
124 	mtd->size = size;  in mtdram_init_device()
125 	mtd->writesize = 1;  in mtdram_init_device()
126 	mtd->writebufsize = 64; /* Mimic CFI NOR flashes */  in mtdram_init_device()
127 	mtd->erasesize = MTDRAM_ERASE_SIZE;  in mtdram_init_device()
128 	mtd->priv = mapped_address;  in mtdram_init_device()
130 	mtd->owner = THIS_MODULE;  in mtdram_init_device()
131 	mtd->_erase = ram_erase;  in mtdram_init_device()
132 	mtd->_point = ram_point;  in mtdram_init_device()
133 	mtd->_unpoint = ram_unpoint;  in mtdram_init_device()
134 	mtd->_get_unmapped_area = ram_get_unmapped_area;  in mtdram_init_device()
135 	mtd->_read = ram_read;  in mtdram_init_device()
136 	mtd->_write = ram_write;  in mtdram_init_device()
138 	if (mtd_device_register(mtd, NULL, 0))  in mtdram_init_device()