lldb/source/Utility/AddressableBits.cpp

   1 //===-- AddressableBits.cpp -----------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "lldb/Utility/AddressableBits.h"
  10 #include "lldb/lldb-types.h"
  11
  12 #include <cassert>
  13
  14 using namespace lldb;
  15 using namespace lldb_private;
  16
  17 void AddressableBits::SetAddressableBits(uint32_t addressing_bits) {
  18   m_low_memory_addr_bits = m_high_memory_addr_bits = addressing_bits;
  19 }
  20
  21 void AddressableBits::SetAddressableBits(uint32_t lowmem_addressing_bits,
  22                                          uint32_t highmem_addressing_bits) {
  23   m_low_memory_addr_bits = lowmem_addressing_bits;
  24   m_high_memory_addr_bits = highmem_addressing_bits;
  25 }
  26
  27 void AddressableBits::SetLowmemAddressableBits(
  28     uint32_t lowmem_addressing_bits) {
  29   m_low_memory_addr_bits = lowmem_addressing_bits;
  30 }
  31
  32 uint32_t AddressableBits::GetLowmemAddressableBits() const {
  33   return m_low_memory_addr_bits;
  34 }
  35
  36 void AddressableBits::SetHighmemAddressableBits(
  37     uint32_t highmem_addressing_bits) {
  38   m_high_memory_addr_bits = highmem_addressing_bits;
  39 }
  40
  41 uint32_t AddressableBits::GetHighmemAddressableBits() const {
  42   return m_high_memory_addr_bits;
  43 }
  44
  45 addr_t AddressableBits::AddressableBitToMask(uint32_t addressable_bits) {
  46   assert(addressable_bits <= sizeof(addr_t) * 8);
  47   if (addressable_bits == 64)
  48     return 0; // all bits used for addressing
  49   else
  50     return ~((1ULL << addressable_bits) - 1);
  51 }