/*
 * Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifndef OSSL_CRYPTO_S390X_ARCH_H
# define OSSL_CRYPTO_S390X_ARCH_H

# ifndef __ASSEMBLER__

void s390x_kimd(const unsigned char *in, size_t len, unsigned int fc,
                void *param);
void s390x_klmd(const unsigned char *in, size_t inlen, unsigned char *out,
                size_t outlen, unsigned int fc, void *param);
void s390x_km(const unsigned char *in, size_t len, unsigned char *out,
              unsigned int fc, void *param);
void s390x_kmac(const unsigned char *in, size_t len, unsigned int fc,
                void *param);
void s390x_kmo(const unsigned char *in, size_t len, unsigned char *out,
               unsigned int fc, void *param);
void s390x_kmf(const unsigned char *in, size_t len, unsigned char *out,
               unsigned int fc, void *param);
void s390x_kma(const unsigned char *aad, size_t alen, const unsigned char *in,
               size_t len, unsigned char *out, unsigned int fc, void *param);
int s390x_pcc(unsigned int fc, void *param);
int s390x_kdsa(unsigned int fc, void *param, const unsigned char *in,
               size_t len);

void s390x_flip_endian32(unsigned char dst[32], const unsigned char src[32]);
void s390x_flip_endian64(unsigned char dst[64], const unsigned char src[64]);

/*
 * The field elements of OPENSSL_s390xcap_P are the 64-bit words returned by
 * the STFLE instruction followed by the 64-bit word pairs returned by
 * instructions' QUERY functions. If STFLE returns fewer data or an instruction
 * is not supported, the corresponding field elements are zero.
 */
struct OPENSSL_s390xcap_st {
    unsigned long long stfle[4];
    unsigned long long kimd[2];
    unsigned long long klmd[2];
    unsigned long long km[2];
    unsigned long long kmc[2];
    unsigned long long kmac[2];
    unsigned long long kmctr[2];
    unsigned long long kmo[2];
    unsigned long long kmf[2];
    unsigned long long prno[2];
    unsigned long long kma[2];
    unsigned long long pcc[2];
    unsigned long long kdsa[2];
};

extern struct OPENSSL_s390xcap_st OPENSSL_s390xcap_P;

/* convert facility bit number or function code to bit mask */
#  define S390X_CAPBIT(i)	(1ULL << (63 - (i) % 64))

# endif

/* OPENSSL_s390xcap_P offsets [bytes] */
# define S390X_STFLE		0x00
# define S390X_KIMD		0x20
# define S390X_KLMD		0x30
# define S390X_KM		0x40
# define S390X_KMC		0x50
# define S390X_KMAC		0x60
# define S390X_KMCTR		0x70
# define S390X_KMO		0x80
# define S390X_KMF		0x90
# define S390X_PRNO		0xa0
# define S390X_KMA		0xb0
# define S390X_PCC		0xc0
# define S390X_KDSA		0xd0

/* Facility Bit Numbers */
# define S390X_VX		129
# define S390X_VXD		134
# define S390X_VXE		135
# define S390X_MSA9		155	/* message-security-assist-ext. 9 */

/* Function Codes */

/* all instructions */
# define S390X_QUERY		0

/* kimd/klmd */
# define S390X_SHA3_224		32
# define S390X_SHA3_256		33
# define S390X_SHA3_384		34
# define S390X_SHA3_512		35
# define S390X_SHAKE_128	36
# define S390X_SHAKE_256	37
# define S390X_GHASH		65

/* km/kmc/kmac/kmctr/kmo/kmf/kma */
# define S390X_AES_128		18
# define S390X_AES_192		19
# define S390X_AES_256		20

/* prno */
# define S390X_TRNG		114

/* pcc */
# define S390X_SCALAR_MULTIPLY_P256	64
# define S390X_SCALAR_MULTIPLY_P384	65
# define S390X_SCALAR_MULTIPLY_P521	66
# define S390X_SCALAR_MULTIPLY_ED25519  72
# define S390X_SCALAR_MULTIPLY_ED448    73
# define S390X_SCALAR_MULTIPLY_X25519   80
# define S390X_SCALAR_MULTIPLY_X448     81

/* kdsa */
# define S390X_ECDSA_VERIFY_P256	1
# define S390X_ECDSA_VERIFY_P384	2
# define S390X_ECDSA_VERIFY_P521	3
# define S390X_ECDSA_SIGN_P256		9
# define S390X_ECDSA_SIGN_P384		10
# define S390X_ECDSA_SIGN_P521		11
# define S390X_EDDSA_VERIFY_ED25519     32
# define S390X_EDDSA_VERIFY_ED448       36
# define S390X_EDDSA_SIGN_ED25519       40
# define S390X_EDDSA_SIGN_ED448         44

/* Register 0 Flags */
# define S390X_DECRYPT		0x80
# define S390X_KMA_LPC		0x100
# define S390X_KMA_LAAD		0x200
# define S390X_KMA_HS		0x400
# define S390X_KDSA_D		0x80

#endif