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Diffstat (limited to 'arch/sparc64/prom/devops.c')
-rw-r--r-- | arch/sparc64/prom/devops.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/sparc64/prom/devops.c b/arch/sparc64/prom/devops.c new file mode 100644 index 0000000..2c99b21 --- /dev/null +++ b/arch/sparc64/prom/devops.c @@ -0,0 +1,41 @@ +/* $Id: devops.c,v 1.3 1997/10/29 07:43:28 ecd Exp $ + * devops.c: Device operations using the PROM. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + */ +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> + +#include <asm/openprom.h> +#include <asm/oplib.h> + +/* Open the device described by the string 'dstr'. Returns the handle + * to that device used for subsequent operations on that device. + * Returns 0 on failure. + */ +int +prom_devopen(char *dstr) +{ + return p1275_cmd ("open", P1275_ARG(0,P1275_ARG_IN_STRING)| + P1275_INOUT(1,1), + dstr); +} + +/* Close the device described by device handle 'dhandle'. */ +int +prom_devclose(int dhandle) +{ + p1275_cmd ("close", P1275_INOUT(1,0), dhandle); + return 0; +} + +/* Seek to specified location described by 'seekhi' and 'seeklo' + * for device 'dhandle'. + */ +void +prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo) +{ + p1275_cmd ("seek", P1275_INOUT(3,1), dhandle, seekhi, seeklo); +} |