| // 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->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && |
| (ipb->ipl_info.ccw.vm_parm_len > 0)) { |
| |
| len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len); |
| memcpy(dest, ipb->ipl_info.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; |
| } |