diff options
author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 23:05:57 +1030 |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 23:05:57 +1030 |
commit | 2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch) | |
tree | 726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /arch/sparc/prom/devops_32.c | |
parent | e12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff) | |
parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/x86/kernel/io_apic.c
Diffstat (limited to 'arch/sparc/prom/devops_32.c')
-rw-r--r-- | arch/sparc/prom/devops_32.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/sparc/prom/devops_32.c b/arch/sparc/prom/devops_32.c new file mode 100644 index 000000000000..9f1a95c91ad1 --- /dev/null +++ b/arch/sparc/prom/devops_32.c @@ -0,0 +1,89 @@ +/* + * devops.c: Device operations using the PROM. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> + +#include <asm/openprom.h> +#include <asm/oplib.h> + +extern void restore_current(void); + +/* Open the device described by the string 'dstr'. Returns the handle + * to that device used for subsequent operations on that device. + * Returns -1 on failure. + */ +int +prom_devopen(char *dstr) +{ + int handle; + unsigned long flags; + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + handle = (*(romvec->pv_v0devops.v0_devopen))(dstr); + if(handle == 0) handle = -1; + break; + case PROM_V2: + case PROM_V3: + handle = (*(romvec->pv_v2devops.v2_dev_open))(dstr); + break; + default: + handle = -1; + break; + }; + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + + return handle; +} + +/* Close the device described by device handle 'dhandle'. */ +int +prom_devclose(int dhandle) +{ + unsigned long flags; + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + (*(romvec->pv_v0devops.v0_devclose))(dhandle); + break; + case PROM_V2: + case PROM_V3: + (*(romvec->pv_v2devops.v2_dev_close))(dhandle); + break; + default: + break; + }; + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + 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) +{ + unsigned long flags; + spin_lock_irqsave(&prom_lock, flags); + switch(prom_vers) { + case PROM_V0: + (*(romvec->pv_v0devops.v0_seekdev))(dhandle, seekhi, seeklo); + break; + case PROM_V2: + case PROM_V3: + (*(romvec->pv_v2devops.v2_dev_seek))(dhandle, seekhi, seeklo); + break; + default: + break; + }; + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + + return; +} |