From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/sparc/prom/devmap.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 arch/sparc/prom/devmap.c (limited to 'arch/sparc/prom/devmap.c') diff --git a/arch/sparc/prom/devmap.c b/arch/sparc/prom/devmap.c new file mode 100644 index 000000000000..eb12073578ad --- /dev/null +++ b/arch/sparc/prom/devmap.c @@ -0,0 +1,54 @@ +/* $Id: devmap.c,v 1.7 2000/08/26 02:38:03 anton Exp $ + * promdevmap.c: Map device/IO areas to virtual addresses. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +#include +#include +#include + +#include +#include + +extern void restore_current(void); + +/* 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) +{ + unsigned long flags; + char *ret; + + spin_lock_irqsave(&prom_lock, flags); + if((num_bytes == 0) || (paddr == 0)) ret = (char *) 0x0; + else + ret = (*(romvec->pv_v2devops.v2_dumb_mmap))(vhint, ios, paddr, + num_bytes); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return ret; +} + +/* Unmap an IO/device area that was mapped using the above routine. */ +void +prom_unmapio(char *vaddr, unsigned int num_bytes) +{ + unsigned long flags; + + if(num_bytes == 0x0) return; + spin_lock_irqsave(&prom_lock, flags); + (*(romvec->pv_v2devops.v2_dumb_munmap))(vaddr, num_bytes); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return; +} -- cgit v1.2.3-58-ga151