// SPDX-License-Identifier: GPL-2.0
|
#include <asm/ebcdic.h>
|
#include <asm/ipl.h>
|
|
/* VM IPL PARM routines */
|
size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
|
const struct ipl_parameter_block *ipb)
|
{
|
int i;
|
size_t len;
|
char has_lowercase = 0;
|
|
len = 0;
|
if ((ipb->ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP) &&
|
(ipb->ccw.vm_parm_len > 0)) {
|
|
len = min_t(size_t, size - 1, ipb->ccw.vm_parm_len);
|
memcpy(dest, ipb->ccw.vm_parm, len);
|
/* If at least one character is lowercase, we assume mixed
|
* case; otherwise we convert everything to lowercase.
|
*/
|
for (i = 0; i < len; i++)
|
if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
|
(dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
|
(dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
|
has_lowercase = 1;
|
break;
|
}
|
if (!has_lowercase)
|
EBC_TOLOWER(dest, len);
|
EBCASC(dest, len);
|
}
|
dest[len] = 0;
|
|
return len;
|
}
|
