mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
86 lines
1.7 KiB
C
86 lines
1.7 KiB
C
/*
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* zipl - zSeries Initial Program Loader tool
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*
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* Single-volume ECKD DASD dump tool
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*
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* Copyright IBM Corp. 2013, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include "eckd2dump.h"
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#include "error.h"
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#include "stage2dump.h"
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/*
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* Magic number at start of dump record
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*/
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uint64_t magic __attribute__((section(".stage2.head"))) =
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0x5a45434b44363404ULL; /* "ZECKD64", version 4 */
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/*
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* ECKD parameter block passed by zipl
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*/
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struct eckd_dump_param {
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uint32_t blk_start;
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uint32_t blk_end;
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uint16_t blk_size;
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uint8_t num_heads;
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uint8_t bpt;
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char reserved[4];
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} __packed;
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/*
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* Get device characteristics from zipl parameter block
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*/
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void dt_device_parm_setup(void)
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{
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struct eckd_dump_param *parm = (void *) __stage2_desc;
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device.blk_start = parm->blk_start;
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device.blk_end = parm->blk_end;
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device.blk_size = parm->blk_size;
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device.num_heads = parm->num_heads;
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device.bpt = parm->bpt;
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device.sid = IPL_SC;
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}
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/*
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* Enable DASD device
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*/
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void dt_device_enable(void)
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{
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io_irq_enable();
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set_device(device.sid, ENABLED);
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stage2dump_eckd_init();
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}
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/*
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* Dump all memory to DASD partition
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*/
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void dt_dump_mem(void)
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{
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unsigned long blk, addr, page;
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blk = device.blk_start;
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page = get_zeroed_page();
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/* Write dump header */
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writeblock(blk, __pa(dump_hdr), m2b(DF_S390_HDR_SIZE), 0);
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blk += m2b(DF_S390_HDR_SIZE);
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/* Write memory */
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for (addr = 0; addr < dump_hdr->mem_size; addr += b2m(eckd_blk_max)) {
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writeblock(blk, addr, eckd_blk_max, page);
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progress_print(addr);
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blk += eckd_blk_max;
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}
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progress_print(addr);
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/* Write end marker */
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df_s390_em_page_init(page);
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writeblock(blk, page, 1, 0);
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free_page(page);
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}
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