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>
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/*
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* zipl - zSeries Initial Program Loader tool
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*
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* Common I/O functions
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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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#ifndef CIO_H
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#define CIO_H
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#include "libc.h"
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#include "s390.h"
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/* Condition codes */
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#define CC_INITIATED 0
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#define CC_STATUS_PENDING 1
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#define CC_BUSY 2
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#define CC_NOT_OPER 3
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/* CCW FLAGS */
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#define CCW_FLAG_IDA 0x04
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#define CCW_FLAG_CC 0x40
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#define CCW_FLAG_SLI 0x20
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#define FIRST_PATH_MASK 0x80
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#define DISABLED 0
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#define ENABLED 1
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#define MAX_RETRIES 255
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struct subchannel_id {
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uint32_t cssid:8;
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uint32_t:4;
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uint32_t m:1;
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uint32_t ssid:2;
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uint32_t one:1;
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uint32_t sch_no:16;
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} __packed __aligned(4);
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struct ccw1 {
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uint8_t cmd_code;
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uint8_t flags;
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uint16_t count;
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uint32_t cda;
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} __packed __aligned(8);
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struct irb {
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uint8_t data[64];
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} __packed __aligned(4);
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struct orb {
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uint32_t intparm; /* interruption parameter */
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uint32_t key:4; /* flags, like key, suspend control, etc. */
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uint32_t spnd:1; /* suspend control */
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uint32_t res1:1; /* reserved */
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uint32_t mod:1; /* modification control */
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uint32_t sync:1; /* synchronize control */
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uint32_t fmt:1; /* format control */
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uint32_t pfch:1; /* prefetch control */
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uint32_t isic:1; /* initial-status-interruption control */
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uint32_t alcc:1; /* address-limit-checking control */
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uint32_t ssic:1; /* suppress-suspended-interr. control */
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uint32_t res2:1; /* reserved */
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uint32_t c64:1; /* IDAW/QDIO 64 bit control */
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uint32_t i2k:1; /* IDAW 2/4kB block size control */
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uint32_t lpm:8; /* logical path mask */
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uint32_t ils:1; /* incorrect length */
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uint32_t zero:6; /* reserved zeros */
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uint32_t orbx:1; /* ORB extension control */
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uint32_t cpa; /* channel program address */
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uint8_t reserved[20];
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} __packed __aligned(4);
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struct scsw {
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uint32_t key:4;
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uint32_t sctl:1;
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uint32_t eswf:1;
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uint32_t cc:2;
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uint32_t fmt:1;
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uint32_t pfch:1;
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uint32_t isic:1;
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uint32_t alcc:1;
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uint32_t ssi:1;
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uint32_t zcc:1;
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uint32_t ectl:1;
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uint32_t pno:1;
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uint32_t res:1;
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uint32_t fctl:3;
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uint32_t actl:7;
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uint32_t stctl:5;
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uint32_t cpa;
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uint32_t dstat:8;
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uint32_t cstat:8;
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uint32_t count:16;
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} __packed;
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struct pmcw {
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uint32_t intparm; /* interruption parameter */
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uint32_t qf:1;
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uint32_t w:1;
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uint32_t isc:3; /* interruption sublass */
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uint32_t res5:3; /* reserved zeros */
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uint32_t ena:1; /* enabled */
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uint32_t lm:2; /* limit mode */
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uint32_t mme:2; /* measurement-mode enable */
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uint32_t mp:1; /* multipath mode */
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uint32_t tf:1; /* timing facility */
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uint32_t dnv:1; /* device number valid */
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uint32_t dev:16; /* device number */
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uint8_t lpm; /* logical path mask */
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uint8_t pnom; /* path not operational mask */
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uint8_t lpum; /* last path used mask */
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uint8_t pim; /* path installed mask */
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uint16_t mbi; /* measurement-block index */
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uint8_t pom; /* path operational mask */
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uint8_t pam; /* path available mask */
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uint8_t chpid[8]; /* CHPID 0-7 (if available) */
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uint32_t unused1:8; /* reserved zeros */
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uint32_t st:3;
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uint32_t unused2:18; /* reserved zeros */
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uint32_t mbfc:1; /* measurement block format control */
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uint32_t xmwme:1; /* extended measurement word mode enable */
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uint32_t csense:1; /* concurrent sense; can be enabled ...*/
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/* ... per MSCH, however, if facility */
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/* ... is not installed, this results */
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/* ... in an operand exception. */
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} __packed;
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struct schib {
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struct pmcw pmcw; /* path management control word */
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struct scsw scsw; /* subchannel status word */
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uint64_t mba; /* measurement block address */
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uint8_t mda[4]; /* model dependent area */
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} __packed __aligned(4);
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int start_io(struct subchannel_id, struct irb *, struct orb *, int panic);
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int store_subchannel(struct subchannel_id, struct schib *);
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void io_irq_enable(void);
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void io_irq_disable(void);
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void set_device(struct subchannel_id, int);
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#endif /* CIO_H */
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