cregit-Linux how code gets into the kernel

Release 4.11 drivers/s390/crypto/ap_asm.h

/*
 * Copyright IBM Corp. 2016
 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
 *
 * Adjunct processor bus inline assemblies.
 */

#ifndef _AP_ASM_H_

#define _AP_ASM_H_

#include <asm/isc.h>

/**
 * ap_intructions_available() - Test if AP instructions are available.
 *
 * Returns 0 if the AP instructions are installed.
 */

static inline int ap_instructions_available(void) { register unsigned long reg0 asm ("0") = AP_MKQID(0, 0); register unsigned long reg1 asm ("1") = -ENODEV; register unsigned long reg2 asm ("2") = 0UL; asm volatile( " .long 0xb2af0000\n" /* PQAP(TAPQ) */ "0: la %1,0\n" "1:\n" EX_TABLE(0b, 1b) : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc"); return reg1; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky56100.00%1100.00%
Total56100.00%1100.00%

/** * ap_tapq(): Test adjunct processor queue. * @qid: The AP queue number * @info: Pointer to queue descriptor * * Returns AP queue status structure. */
static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info) { register unsigned long reg0 asm ("0") = qid; register struct ap_queue_status reg1 asm ("1"); register unsigned long reg2 asm ("2") = 0UL; asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); if (info) *info = reg2; return reg1; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky64100.00%1100.00%
Total64100.00%1100.00%

/** * ap_pqap_rapq(): Reset adjunct processor queue. * @qid: The AP queue number * * Returns AP queue status structure. */
static inline struct ap_queue_status ap_rapq(ap_qid_t qid) { register unsigned long reg0 asm ("0") = qid | 0x01000000UL; register struct ap_queue_status reg1 asm ("1"); register unsigned long reg2 asm ("2") = 0UL; asm volatile( ".long 0xb2af0000" /* PQAP(RAPQ) */ : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); return reg1; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky52100.00%1100.00%
Total52100.00%1100.00%

/** * ap_aqic(): Enable interruption for a specific AP. * @qid: The AP queue number * @ind: The notification indicator byte * * Returns AP queue status. */
static inline struct ap_queue_status ap_aqic(ap_qid_t qid, void *ind) { register unsigned long reg0 asm ("0") = qid | (3UL << 24); register unsigned long reg1_in asm ("1") = (8UL << 44) | AP_ISC; register struct ap_queue_status reg1_out asm ("1"); register void *reg2 asm ("2") = ind; asm volatile( ".long 0xb2af0000" /* PQAP(AQIC) */ : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) : : "cc"); return reg1_out; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky77100.00%1100.00%
Total77100.00%1100.00%

/** * ap_qci(): Get AP configuration data * * Returns 0 on success, or -EOPNOTSUPP. */
static inline int ap_qci(void *config) { register unsigned long reg0 asm ("0") = 0x04000000UL; register unsigned long reg1 asm ("1") = -EINVAL; register void *reg2 asm ("2") = (void *) config; asm volatile( ".long 0xb2af0000\n" /* PQAP(QCI) */ "0: la %1,0\n" "1:\n" EX_TABLE(0b, 1b) : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc", "memory"); return reg1; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky5698.25%150.00%
Heiko Carstens11.75%150.00%
Total57100.00%2100.00%

/** * ap_nqap(): Send message to adjunct processor queue. * @qid: The AP queue number * @psmid: The program supplied message identifier * @msg: The message text * @length: The message length * * Returns AP queue status structure. * Condition code 1 on NQAP can't happen because the L bit is 1. * Condition code 2 on NQAP also means the send is incomplete, * because a segment boundary was reached. The NQAP is repeated. */
static inline struct ap_queue_status ap_nqap(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) { register unsigned long reg0 asm ("0") = qid | 0x40000000UL; register struct ap_queue_status reg1 asm ("1"); register unsigned long reg2 asm ("2") = (unsigned long) msg; register unsigned long reg3 asm ("3") = (unsigned long) length; register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); register unsigned long reg5 asm ("5") = psmid & 0xffffffff; asm volatile ( "0: .long 0xb2ad0042\n" /* NQAP */ " brc 2,0b" : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) : "d" (reg4), "d" (reg5) : "cc", "memory"); return reg1; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky11499.13%150.00%
Heiko Carstens10.87%150.00%
Total115100.00%2100.00%

/** * ap_dqap(): Receive message from adjunct processor queue. * @qid: The AP queue number * @psmid: Pointer to program supplied message identifier * @msg: The message text * @length: The message length * * Returns AP queue status structure. * Condition code 1 on DQAP means the receive has taken place * but only partially. The response is incomplete, hence the * DQAP is repeated. * Condition code 2 on DQAP also means the receive is incomplete, * this time because a segment boundary was reached. Again, the * DQAP is repeated. * Note that gpr2 is used by the DQAP instruction to keep track of * any 'residual' length, in case the instruction gets interrupted. * Hence it gets zeroed before the instruction. */
static inline struct ap_queue_status ap_dqap(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) { register unsigned long reg0 asm("0") = qid | 0x80000000UL; register struct ap_queue_status reg1 asm ("1"); register unsigned long reg2 asm("2") = 0UL; register unsigned long reg4 asm("4") = (unsigned long) msg; register unsigned long reg5 asm("5") = (unsigned long) length; register unsigned long reg6 asm("6") = 0UL; register unsigned long reg7 asm("7") = 0UL; asm volatile( "0: .long 0xb2ae0064\n" /* DQAP */ " brc 6,0b\n" : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7) : : "cc", "memory"); *psmid = (((unsigned long long) reg6) << 32) + reg7; return reg1; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky13499.26%150.00%
Heiko Carstens10.74%150.00%
Total135100.00%2100.00%

#endif /* _AP_ASM_H_ */

Overall Contributors

PersonTokensPropCommitsCommitProp
Martin Schwidefsky57399.48%133.33%
Heiko Carstens30.52%266.67%
Total576100.00%3100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.