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>
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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* zipl - zSeries Initial Program Loader tool
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*
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* Subroutines for ECKD disks
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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 "eckd.h"
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#include "s390.h"
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#include "stage2.h"
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int extract_length(void *data)
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{
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struct eckd_blockptr *blockptr = (struct eckd_blockptr *)data;
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return blockptr->size * (blockptr->blockct + 1);
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}
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int is_zero_block(void *data)
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{
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struct eckd_blockptr *blockptr = (struct eckd_blockptr *)data;
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return blockptr->cyl || blockptr->head || blockptr->sec;
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}
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void * load_direct(disk_blockptr_t *data, struct subchannel_id subchannel_id,
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void *load_addr)
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{
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struct eckd_blockptr *blockptr = (struct eckd_blockptr *)data;
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struct ccw1 *ccws;
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unsigned long record_size;
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struct seek_arg seek_addr;
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struct chr_t search_arg;
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int record_number;
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struct irb *irb;
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struct orb orb;
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int i = 3;
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irb = (struct irb *)&S390_lowcore.irb;
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memset(irb, 0, sizeof(struct irb));
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memset(&orb, 0, sizeof(struct orb));
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memset(&seek_addr, 0, sizeof(struct ch_t));
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memset(&search_arg, 0, sizeof(struct chr_t));
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ccws = (struct ccw1 *)get_zeroed_page();
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/* initialise SEEK, SEARCH and TIC CCW*/
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ccws[0].cmd_code = DASD_ECKD_CCW_SEEK;
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ccws[0].flags = CCW_FLAG_CC | CCW_FLAG_SLI;
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ccws[0].count = 6;
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seek_addr.ch.cyl = blockptr->cyl;
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seek_addr.ch.head = blockptr->head;
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ccws[0].cda = (uint32_t) (unsigned long) &seek_addr;
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record_number = blockptr->blockct;
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record_size = blockptr->size;
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ccws[1].cmd_code = DASD_ECKD_CCW_SEARCH;
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ccws[1].flags = CCW_FLAG_CC | CCW_FLAG_SLI;
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ccws[1].count = 5;
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search_arg.cyl = blockptr->cyl;
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search_arg.head = blockptr->head;
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search_arg.record = blockptr->sec;
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ccws[1].cda = (uint32_t) (unsigned long) &search_arg;
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ccws[2].cmd_code = DASD_ECKD_CCW_TIC;
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ccws[2].flags = 0;
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ccws[2].count = 0;
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ccws[2].cda = (uint32_t) (unsigned long) &ccws[1];
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/* initialise READ CCWs */
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while (1) {
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ccws[i].cmd_code = DASD_ECKD_CCW_READ_MT;
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ccws[i].flags = CCW_FLAG_SLI;
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ccws[i].count = record_size;
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ccws[i].cda = (uint32_t) (unsigned long) load_addr;
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record_number--;
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load_addr += record_size;
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i++;
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if (record_number >= 0)
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ccws[i-1].flags |= CCW_FLAG_CC;
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else
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break;
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}
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orb.fmt = 1;
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orb.cpa = (uint32_t) (unsigned long) ccws;
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start_io(subchannel_id, irb, &orb, 1);
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free_page((unsigned long)ccws);
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return load_addr;
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}
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