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/*
* zipl - zSeries Initial Program Loader tool
*
* Common I/O functions
*
* Copyright IBM Corp. 2013, 2017
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef CIO_H
#define CIO_H
#include "libc.h"
#include "boot/s390.h"
/* Condition codes */
#define CC_INITIATED 0
#define CC_STATUS_PENDING 1
#define CC_BUSY 2
#define CC_NOT_OPER 3
/* CCW FLAGS */
#define CCW_FLAG_IDA 0x04
#define CCW_FLAG_CC 0x40
#define CCW_FLAG_SLI 0x20
#define FIRST_PATH_MASK 0x80
#define DISABLED 0
#define ENABLED 1
#define MAX_RETRIES 255
struct subchannel_id {
uint32_t cssid:8;
uint32_t:4;
uint32_t m:1;
uint32_t ssid:2;
uint32_t one:1;
uint32_t sch_no:16;
} __packed __aligned(4);
struct ccw1 {
uint8_t cmd_code;
uint8_t flags;
uint16_t count;
uint32_t cda;
} __packed __aligned(8);
struct irb {
uint8_t data[64];
} __packed __aligned(4);
struct orb {
uint32_t intparm; /* interruption parameter */
uint32_t key:4; /* flags, like key, suspend control, etc. */
uint32_t spnd:1; /* suspend control */
uint32_t res1:1; /* reserved */
uint32_t mod:1; /* modification control */
uint32_t sync:1; /* synchronize control */
uint32_t fmt:1; /* format control */
uint32_t pfch:1; /* prefetch control */
uint32_t isic:1; /* initial-status-interruption control */
uint32_t alcc:1; /* address-limit-checking control */
uint32_t ssic:1; /* suppress-suspended-interr. control */
uint32_t res2:1; /* reserved */
uint32_t c64:1; /* IDAW/QDIO 64 bit control */
uint32_t i2k:1; /* IDAW 2/4kB block size control */
uint32_t lpm:8; /* logical path mask */
uint32_t ils:1; /* incorrect length */
uint32_t zero:6; /* reserved zeros */
uint32_t orbx:1; /* ORB extension control */
uint32_t cpa; /* channel program address */
uint8_t reserved[20];
} __packed __aligned(4);
struct scsw {
uint32_t key:4;
uint32_t sctl:1;
uint32_t eswf:1;
uint32_t cc:2;
uint32_t fmt:1;
uint32_t pfch:1;
uint32_t isic:1;
uint32_t alcc:1;
uint32_t ssi:1;
uint32_t zcc:1;
uint32_t ectl:1;
uint32_t pno:1;
uint32_t res:1;
uint32_t fctl:3;
uint32_t actl:7;
uint32_t stctl:5;
uint32_t cpa;
uint32_t dstat:8;
uint32_t cstat:8;
uint32_t count:16;
} __packed;
struct pmcw {
uint32_t intparm; /* interruption parameter */
uint32_t qf:1;
uint32_t w:1;
uint32_t isc:3; /* interruption sublass */
uint32_t res5:3; /* reserved zeros */
uint32_t ena:1; /* enabled */
uint32_t lm:2; /* limit mode */
uint32_t mme:2; /* measurement-mode enable */
uint32_t mp:1; /* multipath mode */
uint32_t tf:1; /* timing facility */
uint32_t dnv:1; /* device number valid */
uint32_t dev:16; /* device number */
uint8_t lpm; /* logical path mask */
uint8_t pnom; /* path not operational mask */
uint8_t lpum; /* last path used mask */
uint8_t pim; /* path installed mask */
uint16_t mbi; /* measurement-block index */
uint8_t pom; /* path operational mask */
uint8_t pam; /* path available mask */
uint8_t chpid[8]; /* CHPID 0-7 (if available) */
uint32_t unused1:8; /* reserved zeros */
uint32_t st:3;
uint32_t unused2:18; /* reserved zeros */
uint32_t mbfc:1; /* measurement block format control */
uint32_t xmwme:1; /* extended measurement word mode enable */
uint32_t csense:1; /* concurrent sense; can be enabled ...*/
/* ... per MSCH, however, if facility */
/* ... is not installed, this results */
/* ... in an operand exception. */
} __packed;
struct schib {
struct pmcw pmcw; /* path management control word */
struct scsw scsw; /* subchannel status word */
uint64_t mba; /* measurement block address */
uint8_t mda[4]; /* model dependent area */
} __packed __aligned(4);
int start_io(struct subchannel_id, struct irb *, struct orb *, int panic);
int store_subchannel(struct subchannel_id, struct schib *);
void io_irq_enable(void);
void io_irq_disable(void);
void set_device(struct subchannel_id, int);
#endif /* CIO_H */
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