49698745e5
To distinguish zfcpdump case and to be able to parse some of the kernel command line arguments early (e.g. mem=) ipl block retrieval and command line construction code is moved to the early boot phase. "memory_end" is set up correctly respecting "mem=" and hsa_size in case of the zfcpdump. arch/s390/boot/string.c is introduced to provide string handling and command line parsing functions to early boot phase code for the compressed kernel image case. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
37 lines
955 B
C
37 lines
955 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <asm/ebcdic.h>
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#include <asm/ipl.h>
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/* VM IPL PARM routines */
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size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
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const struct ipl_parameter_block *ipb)
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{
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int i;
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size_t len;
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char has_lowercase = 0;
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len = 0;
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if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
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(ipb->ipl_info.ccw.vm_parm_len > 0)) {
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len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
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memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
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/* If at least one character is lowercase, we assume mixed
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* case; otherwise we convert everything to lowercase.
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*/
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for (i = 0; i < len; i++)
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if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
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(dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
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(dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
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has_lowercase = 1;
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break;
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}
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if (!has_lowercase)
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EBC_TOLOWER(dest, len);
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EBCASC(dest, len);
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}
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dest[len] = 0;
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return len;
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}
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