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[PATCH] powerpc: hvc_console updates

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These are some updates from both Ryan and Arnd for the hvc_console
driver:

The main point is to enable the inclusion of a console driver
for rtas, which is currrently needed for the cell platform.

Also shuffle around some data-type declarations and moves some
functions out of include/asm-ppc64/hvconsole.h and into a new
drivers/char/hvc_console.h file.

Signed-off-by: "Ryan S. Arnold" <rsa@us.ibm.com>
Signed-off-by: Arnd Bergmann <abergman@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Ryan S. Arnold
2006-03-27 21:25:16 +02:00
committed by Paul Mackerras
parent 11089f08d9
commit 45d607ed92
7 changed files with 128 additions and 59 deletions
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26
include/asm-powerpc/hvconsole.h
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@ -24,28 +24,18 @@
#ifdef __KERNEL__
/*
* This is the max number of console adapters that can/will be found as
* console devices on first stage console init. Any number beyond this range
* can't be used as a console device but is still a valid tty device.
* PSeries firmware will only send/recv up to 16 bytes of character data per
* hcall.
*/
#define MAX_NR_HVC_CONSOLES 16
#define MAX_VIO_PUT_CHARS 16
#define SIZE_VIO_GET_CHARS 16
/* implemented by a low level driver */
struct hv_ops {
int (*get_chars)(uint32_t vtermno, char *buf, int count);
int (*put_chars)(uint32_t vtermno, const char *buf, int count);
};
/*
* Vio firmware always attempts to fetch MAX_VIO_GET_CHARS chars. The 'count'
* parm is included to conform to put_chars() function pointer template
*/
extern int hvc_get_chars(uint32_t vtermno, char *buf, int count);
extern int hvc_put_chars(uint32_t vtermno, const char *buf, int count);
struct hvc_struct;
/* Register a vterm and a slot index for use as a console (console_init) */
extern int hvc_instantiate(uint32_t vtermno, int index, struct hv_ops *ops);
/* register a vterm for hvc tty operation (module_init or hotplug add) */
extern struct hvc_struct * __devinit hvc_alloc(uint32_t vtermno, int irq,
struct hv_ops *ops);
/* remove a vterm from hvc tty operation (modele_exit or hotplug remove) */
extern int __devexit hvc_remove(struct hvc_struct *hp);
#endif /* __KERNEL__ */
#endif /* _PPC64_HVCONSOLE_H */