mca-legacy.h
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上传日期:2009-04-28
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- /* -*- mode: c; c-basic-offset: 8 -*- */
- /* This is the function prototypes for the old legacy MCA interface
- *
- * Please move your driver to the new sysfs based one instead */
- #ifndef _LINUX_MCA_LEGACY_H
- #define _LINUX_MCA_LEGACY_H
- #include <linux/mca.h>
- #warning "MCA legacy - please move your driver to the new sysfs api"
- /* MCA_NOTFOUND is an error condition. The other two indicate
- * motherboard POS registers contain the adapter. They might be
- * returned by the mca_find_adapter() function, and can be used as
- * arguments to mca_read_stored_pos(). I'm not going to allow direct
- * access to the motherboard registers until we run across an adapter
- * that requires it. We don't know enough about them to know if it's
- * safe.
- *
- * See Documentation/mca.txt or one of the existing drivers for
- * more information.
- */
- #define MCA_NOTFOUND (-1)
- /* Returns the slot of the first enabled adapter matching id. User can
- * specify a starting slot beyond zero, to deal with detecting multiple
- * devices. Returns MCA_NOTFOUND if id not found. Also checks the
- * integrated adapters.
- */
- extern int mca_find_adapter(int id, int start);
- extern int mca_find_unused_adapter(int id, int start);
- extern int mca_is_adapter_used(int slot);
- extern int mca_mark_as_used(int slot);
- extern void mca_mark_as_unused(int slot);
- /* gets a byte out of POS register (stored in memory) */
- extern unsigned char mca_read_stored_pos(int slot, int reg);
- /* This can be expanded later. Right now, it gives us a way of
- * getting meaningful information into the MCA_info structure,
- * so we can have a more interesting /proc/mca.
- */
- extern void mca_set_adapter_name(int slot, char* name);
- /* These routines actually mess with the hardware POS registers. They
- * temporarily disable the device (and interrupts), so make sure you know
- * what you're doing if you use them. Furthermore, writing to a POS may
- * result in two devices trying to share a resource, which in turn can
- * result in multiple devices sharing memory spaces, IRQs, or even trashing
- * hardware. YOU HAVE BEEN WARNED.
- *
- * You can only access slots with this. Motherboard registers are off
- * limits.
- */
- /* read a byte from the specified POS register. */
- extern unsigned char mca_read_pos(int slot, int reg);
- /* write a byte to the specified POS register. */
- extern void mca_write_pos(int slot, int reg, unsigned char byte);
- #endif