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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [sparc/] [prom/] [devmap.c] - Rev 1777
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/* $Id: devmap.c,v 1.1 2005-12-20 09:49:32 jcastillo Exp $ * promdevmap.c: Map device/IO areas to virtual addresses. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) */ #include <asm/openprom.h> #include <asm/oplib.h> /* Just like the routines in palloc.c, these should not be used * by the kernel at all. Bootloader facility mainly. And again, * this is only available on V2 proms and above. */ /* Map physical device address 'paddr' in IO space 'ios' of size * 'num_bytes' to a virtual address, with 'vhint' being a hint to * the prom as to where you would prefer the mapping. We return * where the prom actually mapped it. */ char * prom_mapio(char *vhint, int ios, unsigned int paddr, unsigned int num_bytes) { if((num_bytes == 0) || (paddr == 0)) return (char *) 0x0; return (*(romvec->pv_v2devops.v2_dumb_mmap))(vhint, ios, paddr, num_bytes); } /* Unmap an IO/device area that was mapped using the above routine. */ void prom_unmapio(char *vaddr, unsigned int num_bytes) { if(num_bytes == 0x0) return; (*(romvec->pv_v2devops.v2_dumb_munmap))(vaddr, num_bytes); return; }
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