abd696e4f7
Remove tabs, tweak whitespace and comments. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
|
|
* SCLP ASCII access driver
|
|
*
|
|
* Copyright (c) 2013 Alexander Graf <agraf@suse.de>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or (at
|
|
* your option) any later version. See the COPYING file in the top-level
|
|
* directory.
|
|
*/
|
|
|
|
#include "s390-ccw.h"
|
|
#include "sclp.h"
|
|
|
|
static char _sccb[PAGE_SIZE] __attribute__((__aligned__(4096)));
|
|
|
|
/* Perform service call. Return 0 on success, non-zero otherwise. */
|
|
static int sclp_service_call(unsigned int command, void *sccb)
|
|
{
|
|
int cc;
|
|
|
|
asm volatile(
|
|
" .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
|
|
" ipm %0\n"
|
|
" srl %0,28"
|
|
: "=&d" (cc) : "d" (command), "a" (__pa(sccb))
|
|
: "cc", "memory");
|
|
if (cc == 3)
|
|
return -EIO;
|
|
if (cc == 2)
|
|
return -EBUSY;
|
|
return 0;
|
|
}
|
|
|
|
static void sclp_set_write_mask(void)
|
|
{
|
|
WriteEventMask *sccb = (void *)_sccb;
|
|
|
|
sccb->h.length = sizeof(WriteEventMask);
|
|
sccb->mask_length = sizeof(unsigned int);
|
|
sccb->receive_mask = SCLP_EVENT_MASK_MSG_ASCII;
|
|
sccb->cp_receive_mask = SCLP_EVENT_MASK_MSG_ASCII;
|
|
sccb->send_mask = SCLP_EVENT_MASK_MSG_ASCII;
|
|
sccb->cp_send_mask = SCLP_EVENT_MASK_MSG_ASCII;
|
|
|
|
sclp_service_call(SCLP_CMD_WRITE_EVENT_MASK, sccb);
|
|
}
|
|
|
|
void sclp_setup(void)
|
|
{
|
|
sclp_set_write_mask();
|
|
}
|
|
|
|
static int _strlen(const char *str)
|
|
{
|
|
int i;
|
|
for (i = 0; *str; i++)
|
|
str++;
|
|
return i;
|
|
}
|
|
|
|
static void _memcpy(char *dest, const char *src, int len)
|
|
{
|
|
int i;
|
|
for (i = 0; i < len; i++)
|
|
dest[i] = src[i];
|
|
}
|
|
|
|
void sclp_print(const char *str)
|
|
{
|
|
int len = _strlen(str);
|
|
WriteEventData *sccb = (void *)_sccb;
|
|
|
|
sccb->h.length = sizeof(WriteEventData) + len;
|
|
sccb->h.function_code = SCLP_FC_NORMAL_WRITE;
|
|
sccb->ebh.length = sizeof(EventBufferHeader) + len;
|
|
sccb->ebh.type = SCLP_EVENT_ASCII_CONSOLE_DATA;
|
|
sccb->ebh.flags = 0;
|
|
_memcpy(sccb->data, str, len);
|
|
|
|
sclp_service_call(SCLP_CMD_WRITE_EVENT_DATA, sccb);
|
|
}
|