src: fix wbuild warnings

src/arch/arm64/arm_generic_timer.cc

@@ -12,13 +12,13 @@ namespace evisor {
 namespace {
 
 /* CNTHCTL_EL2 definitions */
-constexpr uint64_t kCnthctlEl2Evntdir = BIT64(3);
-constexpr uint64_t kCnthctlEl2Evnten = BIT64(2);
+[[maybe_unused]] constexpr uint64_t kCnthctlEl2Evntdir = BIT64(3);
+[[maybe_unused]] constexpr uint64_t kCnthctlEl2Evnten = BIT64(2);
 constexpr uint64_t kCnthctlEl2El1Pcen = BIT64(1);
 constexpr uint64_t kCnthctlEl2El1Pcten = BIT64(0);
 
 /* CNTHP_CTL_EL2 definitions */
-constexpr uint64_t kCnthpCtlEl2IStatus = BIT64(2);
+[[maybe_unused]] constexpr uint64_t kCnthpCtlEl2IStatus = BIT64(2);
 constexpr uint64_t kCnthpCtlEl2IMask = BIT64(1);
 constexpr uint64_t kCnthpCtlEl2Enable = BIT64(0);
 

src/arch/arm64/boot_el2.cc

@@ -133,9 +133,9 @@ constexpr uint64_t kSctlrEl2InitVal =
     kSctlrEl2SctlrEl1 | kSctlrEl2SaEl1 | kSctlrEl2SaEl2;
 
 /* HCR_EL2, Hypervisor Configuration Register */
-constexpr uint64_t kHcrEl2E2H = BIT64(34);
+[[maybe_unused]] constexpr uint64_t kHcrEl2E2H = BIT64(34);
 constexpr uint64_t kHcrEl2RW = BIT64(31);
-constexpr uint64_t kHcrEl2TGE = BIT64(27);
+[[maybe_unused]] constexpr uint64_t kHcrEl2TGE = BIT64(27);
 constexpr uint64_t kHcrEl2TACR = BIT64(21);
 constexpr uint64_t kHcrEl2TID3 = BIT64(18);
 constexpr uint64_t kHcrEl2TID2 = BIT64(17);

src/arch/arm64/irq/gic_v2.cc

@@ -22,7 +22,7 @@ constexpr uint32_t kGichHcrEn = (1 << 0);
 /* GICH_LR */
 constexpr uint32_t kGichLrHw = (1 << 31);
 constexpr uint32_t kGichLrVirtualIrqGrp0 = (0 << 30);
-constexpr uint32_t kGichLrVirtualIrqGrp1 = (1 << 30);
+[[maybe_unused]] constexpr uint32_t kGichLrVirtualIrqGrp1 = (1 << 30);
 constexpr uint32_t kGichLrStatePending = (1 << 28);
 constexpr uint32_t GICH_LR_PRIORITY(uint32_t x) {
   return x << 23;

src/arch/arm64/irq/trap.cc

@@ -88,24 +88,24 @@ constexpr uint8_t kOp1SCR = 0b000;
 constexpr uint8_t kOp1PCR = 0b001;
 constexpr uint8_t kOp1DBG = 0b010;
 constexpr uint8_t kOp1VMSA_SCR = 0b011;
-constexpr uint8_t kOp1VMSA_HCR = 0b100;
-constexpr uint8_t kOp1VMSA_VTCR = 0b101;
+[[maybe_unused]] constexpr uint8_t kOp1VMSA_HCR = 0b100;
+[[maybe_unused]] constexpr uint8_t kOp1VMSA_VTCR = 0b101;
 constexpr uint8_t kCrnSCTLR_EL1 = 0;
 constexpr uint8_t kCrnACTLR_EL1 = 1;
-constexpr uint8_t kCrnCPACR_EL1 = 2;
-constexpr uint8_t kCrnSCR_EL1 = 3;
-constexpr uint8_t kCrnSDER32_EL3 = 4;
-constexpr uint8_t kCrnAFSR0_EL1 = 5;
-constexpr uint8_t kCrnAFSR1_EL1 = 6;
-constexpr uint8_t kCrnESR_EL1 = 7;
-constexpr uint8_t kCrnFAR_EL1 = 8;
-constexpr uint8_t kCrnHPFAR_EL2 = 9;
-constexpr uint8_t kCrnPAR_EL1 = 10;
-constexpr uint8_t kCrnPMCR_EL0 = 11;
-constexpr uint8_t kCrnPMCCFILTR_EL0 = 12;
+[[maybe_unused]] constexpr uint8_t kCrnCPACR_EL1 = 2;
+[[maybe_unused]] constexpr uint8_t kCrnSCR_EL1 = 3;
+[[maybe_unused]] constexpr uint8_t kCrnSDER32_EL3 = 4;
+[[maybe_unused]] constexpr uint8_t kCrnAFSR0_EL1 = 5;
+[[maybe_unused]] constexpr uint8_t kCrnAFSR1_EL1 = 6;
+[[maybe_unused]] constexpr uint8_t kCrnESR_EL1 = 7;
+[[maybe_unused]] constexpr uint8_t kCrnFAR_EL1 = 8;
+[[maybe_unused]] constexpr uint8_t kCrnHPFAR_EL2 = 9;
+[[maybe_unused]] constexpr uint8_t kCrnPAR_EL1 = 10;
+[[maybe_unused]] constexpr uint8_t kCrnPMCR_EL0 = 11;
+[[maybe_unused]] constexpr uint8_t kCrnPMCCFILTR_EL0 = 12;
 
 constexpr uint8_t kIssDirectionWrite = 0b0;
-constexpr uint8_t kIssDirectionRead = 0b1;
+[[maybe_unused]] constexpr uint8_t kIssDirectionRead = 0b1;
 
 inline uint8_t EsrEl2Ec(uint64_t esr) {
   return ((esr >> kEsrEl2EcShift) & 0x3f);
@@ -263,9 +263,9 @@ inline void HandleTrapSystem(uint32_t iss) {
 inline uint8_t ESR_EL2_ISS_EXCEPTION_FROM_DATA_ABORT_DFSC(uint64_t esr) {
   return esr & 0x3f;
 }
-constexpr uint8_t kEsrEl2DfscAddressSizeFault = 0b0000;
+[[maybe_unused]] constexpr uint8_t kEsrEl2DfscAddressSizeFault = 0b0000;
 constexpr uint8_t kEsrEl2DfscTranslationFault = 0b0001;
-constexpr uint8_t kEsrEl2DfscAccessFlagFault = 0b0010;
+[[maybe_unused]] constexpr uint8_t kEsrEl2DfscAccessFlagFault = 0b0010;
 constexpr uint8_t kEsrEl2DfscPermissionFault = 0b0011;
 
 /// SRT, bits [20:16]:
@@ -283,7 +283,7 @@ inline uint8_t ESR_EL2_ISS_EXCEPTION_FROM_DATA_ABORT_WNR(uint64_t esr) {
   return (esr >> 6) & 0x1;
 }
 constexpr uint8_t kEsrEl2IssExceptionFromDataAboartCausedByRead = 0;
-constexpr uint8_t kEsrEl2IssExceptionFromDataAboartCausedByWrite = 1;
+[[maybe_unused]] constexpr uint8_t kEsrEl2IssExceptionFromDataAboartCausedByWrite = 1;
 
 inline bool HandleTrapMemAbort(va_t addr, uint64_t esr) {
   const auto dfsc = ESR_EL2_ISS_EXCEPTION_FROM_DATA_ABORT_DFSC(esr);

src/drivers/mailbox/mailbox_bcm2711.cc

@@ -26,21 +26,21 @@ constexpr uint32_t kStatus0MessageFull = 0x8000'0000;
 /// Channel 9: Request from VC for response by ARM (none currently defined)
 
 // Mailbox Channel 0: Power Management Interface
-constexpr uint8_t kChannelPower = 0;
+[[maybe_unused]] constexpr uint8_t kChannelPower = 0;
 // Mailbox Channel 1: Frame Buffer
-constexpr uint8_t kChannelFb = 1;
+[[maybe_unused]] constexpr uint8_t kChannelFb = 1;
 // Mailbox Channel 2: Virtual UART
-constexpr uint8_t kChannelUart = 2;
+[[maybe_unused]] constexpr uint8_t kChannelUart = 2;
 // Mailbox Channel 3: VCHIQ Interface
-constexpr uint8_t kChannelVChiq = 3;
+[[maybe_unused]] constexpr uint8_t kChannelVChiq = 3;
 // Mailbox Channel 4: LEDs Interface
-constexpr uint8_t kChannelLeds = 4;
+[[maybe_unused]] constexpr uint8_t kChannelLeds = 4;
 // Mailbox Channel 5: Buttons Interface
-constexpr uint8_t kChannelButtons = 5;
+[[maybe_unused]] constexpr uint8_t kChannelButtons = 5;
 // Mailbox Channel 6: Touchscreen Interface
-constexpr uint8_t kChannelTouch = 6;
+[[maybe_unused]] constexpr uint8_t kChannelTouch = 6;
 // Mailbox Channel 7: Counter
-constexpr uint8_t kChannelCount = 7;
+[[maybe_unused]] constexpr uint8_t kChannelCount = 7;
 // Mailbox Channel 8: Tags (ARM to VC)
 constexpr uint8_t kChannelTags = 8;
 

src/fs/fat/fat32.cc

@@ -18,22 +18,22 @@ constexpr uint32_t kFat32MaxFileNameSize = 255;
 
 constexpr uint16_t kBootSignature = 0xAA55;
 
-constexpr uint8_t kAttrReadOnly = 0x01;
-constexpr uint8_t kAttrHidden = 0x02;
-constexpr uint8_t kAttrSystem = 0x04;
-constexpr uint8_t kAttrVolumeId = 0x08;
+[[maybe_unused]] constexpr uint8_t kAttrReadOnly = 0x01;
+[[maybe_unused]] constexpr uint8_t kAttrHidden = 0x02;
+[[maybe_unused]] constexpr uint8_t kAttrSystem = 0x04;
+[[maybe_unused]] constexpr uint8_t kAttrVolumeId = 0x08;
 constexpr uint8_t kAttrLongName = 0x0f;
 constexpr uint8_t kAttrDirectory = 0x10;
-constexpr uint8_t kAttrArchive = 0x20;
+[[maybe_unused]] constexpr uint8_t kAttrArchive = 0x20;
 
 constexpr uint8_t kDirNameEmptyEntry = 0x00;
 constexpr uint8_t kDirNameKanjiEntry = 0x05;
 constexpr uint8_t kDirNameRemovedEntry = 0xE5;
 
 constexpr uint8_t kLfnLastLongEntry = 0x40;
 
-constexpr uint32_t kUnusedCluster = 0;
-constexpr uint32_t kReservedCluster = 1;
+[[maybe_unused]] constexpr uint32_t kUnusedCluster = 0;
+[[maybe_unused]] constexpr uint32_t kReservedCluster = 1;
 constexpr uint32_t kBadCluster = 0x0FFFFFF7;
 }  // namespace
 

src/mm/heap/kmm_malloc.cc

@@ -17,14 +17,12 @@ namespace {
 bool kernelHeapMemMap[HEAP_PAGES] = {false};
 }  // namespace
 
-void* kmm_malloc(size_t size) {
+void* kmm_malloc([[maybe_unused]] size_t size) {
   if (size < 1) {
     return nullptr;
   }
 
-  // FIXME
-  size = size;
-
+  // FIXME: need to consider 'size' var
   for (uint32_t i = 0; i < HEAP_PAGES; i++) {
     if (!kernelHeapMemMap[i]) {
       kernelHeapMemMap[i] = true;

src/mm/pgtable_stage2.cc

@@ -11,7 +11,7 @@ namespace evisor {
 
 namespace {
 
-constexpr uint64_t kStage2PteTypeBlock = 1;
+[[maybe_unused]] constexpr uint64_t kStage2PteTypeBlock = 1;
 constexpr uint64_t kStage2PteTypePage = 3;
 constexpr uint64_t kStage2PteTypePageTable = 3;
 
@@ -24,7 +24,7 @@ constexpr uint64_t kStage2PteAf = (1 << 10);
 // Non-shaeable
 constexpr uint64_t kStage2PteShNonShareable = (0 << 8);
 // SH Inner Shareable
-constexpr uint64_t kStage2PteShInnerShareable = (2 << 8);
+[[maybe_unused]] constexpr uint64_t kStage2PteShInnerShareable = (2 << 8);
 // SH Outer Shareable
 constexpr uint64_t kStage2PteShOuterShareable = (3 << 8);
 
@@ -35,9 +35,9 @@ constexpr uint64_t kStage2PteShOuterShareable = (3 << 8);
 // No access from EL1
 constexpr uint64_t kStage2PteS2ApNone = (0 << 6);
 // RO access from EL1
-constexpr uint64_t kStage2PteS2ApRO = (1 << 6);
+[[maybe_unused]] constexpr uint64_t kStage2PteS2ApRO = (1 << 6);
 // WO access from EL1
-constexpr uint64_t kStage2PteS2ApWO = (2 << 6);
+[[maybe_unused]] constexpr uint64_t kStage2PteS2ApWO = (2 << 6);
 // R/W Full access from EL1
 constexpr uint64_t kStage2PteS2ApRW = (3 << 6);
 
@@ -159,7 +159,7 @@ void PgTableStage2::FlushTlbVMID() {
       "tlbi vmalls12e1is\n"
       "dsb ish\n"
       "isb");
-  WRITE_CPU_REG(vttbr_el2, 0);
+  WRITE_CPU_REG(vttbr_el2, static_cast<uint64_t>(0));
 }
 
 }  // namespace evisor

src/mm/uncached/kmm_uncached_malloc.cc

@@ -17,14 +17,12 @@ namespace {
 bool kernelUncachedMemMap[UNCACHED_PAGES] = {false};
 }  // namespace
 
-void* kmm_uncached_malloc(size_t size) {
+void* kmm_uncached_malloc([[maybe_unused]] size_t size) {
   if (size < 1) {
     return nullptr;
   }
 
-  // FIXME
-  size = size;
-
+  // FIXME: need to consider 'size' var
   for (uint32_t i = 0; i < UNCACHED_PAGES; i++) {
     if (!kernelUncachedMemMap[i]) {
       kernelUncachedMemMap[i] = true;

src/mm/user_heap/umm_malloc.cc

@@ -13,7 +13,7 @@ namespace {
 // FIXME: use kUserSize
 constexpr uint32_t kPagingPages =
     static_cast<uint64_t>(1024) * 1024 * 1024 * 2 / PAGE_SIZE;
-constexpr uint32_t kMemMapSize = kPagingPages / 8;
+[[maybe_unused]] constexpr uint32_t kMemMapSize = kPagingPages / 8;
 
 uint8_t userMemoryRegionMap_[kPagingPages] = {0};
 uint32_t nextFreeSpaceIndex = 0;

src/platforms/bcm2711/system_timer.cc

@@ -5,10 +5,10 @@
 namespace evisor {
 
 namespace {
-constexpr uint32_t kCsM0 = (1 << 0);
+[[maybe_unused]] constexpr uint32_t kCsM0 = (1 << 0);
 constexpr uint32_t kCsM1 = (1 << 1);
-constexpr uint32_t kCsM2 = (1 << 2);
-constexpr uint32_t kCsM3 = (1 << 3);
+[[maybe_unused]] constexpr uint32_t kCsM2 = (1 << 2);
+[[maybe_unused]] constexpr uint32_t kCsM3 = (1 << 3);
 }  // namespace
 
 SystemTimer::SystemTimer() {