I am trying to develop a simple character device driver that access the reserved memory region as described in the site: http://www.wiki.xilinx.com/Linux+Reserved+Memory
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/* Get reserved memory region from Device-tree */
np = of_parse_phandle(dev->of_node, "memory-region", 0);
if (!np) {
dev_err(dev, "No %s specified\n", "memory-region");
goto error1;
}
rc = of_address_to_resource(np, 0, &r);
if (rc) {
dev_err(dev, "No memory address assigned to the region\n");
goto error1;
}
lp->paddr = r.start;
lp->vaddr = memremap(r.start, resource_size(&r), MEMREMAP_WB);
dev_info(dev, "Allocated reserved memory, vaddr: 0x%0llX, paddr: 0x%0llX\n", (u64)lp->vaddr, lp->paddr);
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The site does not give any information regarding lp->paddr and lp->vaddr
What is the datatype of "lp" ?