1 // SPDX-License-Identifier: GPL-2.0 2 #include <asm/ebcdic.h> 3 #include <asm/ipl.h> 4 5 /* VM IPL PARM routines */ 6 size_t ipl_block_get_ascii_vmparm(char *dest, size_t size, 7 const struct ipl_parameter_block *ipb) 8 { 9 int i; 10 size_t len; 11 char has_lowercase = 0; 12 13 len = 0; 14 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && 15 (ipb->ipl_info.ccw.vm_parm_len > 0)) { 16 17 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len); 18 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); 19 /* If at least one character is lowercase, we assume mixed 20 * case; otherwise we convert everything to lowercase. 21 */ 22 for (i = 0; i < len; i++) 23 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ 24 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ 25 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ 26 has_lowercase = 1; 27 break; 28 } 29 if (!has_lowercase) 30 EBC_TOLOWER(dest, len); 31 EBCASC(dest, len); 32 } 33 dest[len] = 0; 34 35 return len; 36 } 37