Hi, in a driver that I'm trying to port, I want to remap some physical memory to a new virtual address. In Linux I simply used ioremap and I see there is an equivalent to remap device registers with the ddi_regs_map_setup() but what I want to remap is main memory.
I was thinking of a work around where by I call devmap_segmap() but I am not sure of two things. Can I pass a kmem_alloc'd address for devmap_segmap's 'addrp' parameter? i.e. can an address that already has page table entries be used? If not then how do I generate a virtual address with no corresponding physical page? I guess the call to devmap_segmap expects such an empty page. I'm also thinking of using my PCI driver's major and minor device number for the dev_t parameter of devmap_segmap. Is that fine? Of course since devmap_segmap calls the drivers, segmap routine, in that routine I'll return the page frame number that I wish to remap. Regards, Bhaskar.
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