/*
 * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (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
 */

/* X Macro Definitions for Specification of RISC-V Arch Capabilities */

/*
 * Each RISC-V capability ends up encoded as a single set bit in an array of
 * words. When specifying a new capability, write a new RISCV_DEFINE_CAP
 * statement, with an argument as the extension name in all-caps,
 * second argument as the index in the array where the capability will be stored
 * and third argument as the index of the bit to be used to encode the
 * capability.
 *
 * The fourth and the fifth arguments are copied from linux header asm/hwprobe.h.
 * Directly coping values instead of macro names comes from the fact
 * that an old version may lack definition of some macro.
 * When there is no hwprobe key/value pair for a capability, the key is set to -1
 * and the value is set to 0, as when the hwprobe syscall returns a key of -1,
 * the value is set to 0 and the corresponding capability would not be enabled.
 *
 * RISCV_DEFINE_CAP(EXTENSION NAME, array index, bit index, hwprobe key, hwprobe value) */

RISCV_DEFINE_CAP(ZBA, 0, 0, 4, (1 << 3))
RISCV_DEFINE_CAP(ZBB, 0, 1, 4, (1 << 4))
RISCV_DEFINE_CAP(ZBC, 0, 2, 4, (1 << 7))
RISCV_DEFINE_CAP(ZBS, 0, 3, 4, (1 << 5))
RISCV_DEFINE_CAP(ZBKB, 0, 4, 4, (1 << 8))
RISCV_DEFINE_CAP(ZBKC, 0, 5, 4, (1 << 9))
RISCV_DEFINE_CAP(ZBKX, 0, 6, 4, (1 << 10))
RISCV_DEFINE_CAP(ZKND, 0, 7, 4, (1 << 11))
RISCV_DEFINE_CAP(ZKNE, 0, 8, 4, (1 << 12))
RISCV_DEFINE_CAP(ZKNH, 0, 9, 4, (1 << 13))
RISCV_DEFINE_CAP(ZKSED, 0, 10, 4, (1 << 14))
RISCV_DEFINE_CAP(ZKSH, 0, 11, 4, (1 << 15))
RISCV_DEFINE_CAP(ZKR, 0, 12, -1, 0)
RISCV_DEFINE_CAP(ZKT, 0, 13, 4, (1 << 16))
RISCV_DEFINE_CAP(V, 0, 14, 4, (1 << 2))
RISCV_DEFINE_CAP(ZVBB, 0, 15, 4, (1 << 17))
RISCV_DEFINE_CAP(ZVBC, 0, 16, 4, (1 << 18))
RISCV_DEFINE_CAP(ZVKB, 0, 17, 4, (1 << 19))
RISCV_DEFINE_CAP(ZVKG, 0, 18, 4, (1 << 20))
RISCV_DEFINE_CAP(ZVKNED, 0, 19, 4, (1 << 21))
RISCV_DEFINE_CAP(ZVKNHA, 0, 20, 4, (1 << 22))
RISCV_DEFINE_CAP(ZVKNHB, 0, 21, 4, (1 << 23))
RISCV_DEFINE_CAP(ZVKSED, 0, 22, 4, (1 << 24))
RISCV_DEFINE_CAP(ZVKSH, 0, 23, 4, (1 << 25))

/*
 * In the future ...
 * RISCV_DEFINE_CAP(ZFOO, 0, 31, ..., ...)
 * RISCV_DEFINE_CAP(ZBAR, 1, 0, ..., ...)
 * ... and so on.
 */

#undef RISCV_DEFINE_CAP