| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <stdio.h> |
| |
| #include <hwreg/internal.h> |
| |
| namespace hwreg { |
| |
| namespace internal { |
| |
| void FieldPrinter::Print(uint64_t value, char* buf, size_t len) const { |
| unsigned num_bits = bit_high_incl_ - bit_low_ + 1; |
| uint64_t mask = internal::ComputeMask<uint64_t>(num_bits); |
| uint64_t val = static_cast<uint64_t>((value >> bit_low_) & mask); |
| #ifdef _KERNEL |
| // The kernel does not support the * directive in printf, so we lose out on |
| // the length-matching padding. |
| snprintf(buf, len, "%s[%u:%u]: 0x%" PRIx64 " (%" PRIu64 ")", name_, bit_high_incl_, bit_low_, val, |
| val); |
| #else |
| int pad_len = (num_bits + 3) / 4; |
| snprintf(buf, len, "%s[%" PRIu32 ":%" PRIu32 "]: 0x%0*" PRIx64 " (%" PRIu64 ")", name_, |
| bit_high_incl_, bit_low_, pad_len, val, val); |
| #endif // _KERNEL |
| buf[len - 1] = 0; |
| } |
| |
| void PrintRegisterPrintf(FieldPrinter fields[], size_t num_fields, uint64_t reg_value, |
| uint64_t fields_mask, int register_width_bytes) { |
| PrintRegister([](const char* arg) { printf("%s\n", arg); }, fields, num_fields, reg_value, |
| fields_mask, register_width_bytes); |
| } |
| |
| } // namespace internal |
| |
| } // namespace hwreg |
