feat: make kernel architecture-agnostic; primitive work on arm port

kernel/src/Drivers/USB/Bluetooth/A2dp.cpp

@@ -5,6 +5,7 @@
 */
 
 #include "A2dp.hpp"
+#include <Arch/Cpu.hpp>
 #include "Sbc.hpp"
 #include "L2cap.hpp"
 #include "Hci.hpp"
@@ -12,7 +13,7 @@
 #include <Terminal/Terminal.hpp>
 #include <CppLib/Stream.hpp>
 #include <Libraries/Memory.hpp>
-#include <Timekeeping/ApicTimer.hpp>
+#include <Timekeeping/Timer.hpp>
 #include <atomic>
 
 using namespace Kt;
@@ -232,7 +233,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
                 return true;
             }
             for (int j = 0; j < 100; j++) {
-                asm volatile("" ::: "memory");
+                Arch::CompilerBarrier();
             }
         }
         g_expectLabel.store(0xFF, std::memory_order_release);
@@ -1166,7 +1167,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
                 answered = true;
                 break;
             }
-            for (int j = 0; j < 100; j++) asm volatile("" ::: "memory");
+            for (int j = 0; j < 100; j++) Arch::CompilerBarrier();
         }
 
         // Transaction over: CLOSE the client channel (FreeChannel sends the
@@ -1200,7 +1201,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
             Hci::ProcessPendingCommands();
             auto* c = Hci::GetConnection(g_aclHandle.load(std::memory_order_acquire));
             if (c && c->Encrypted) return true;
-            for (int j = 0; j < 100; j++) asm volatile("" ::: "memory");
+            for (int j = 0; j < 100; j++) Arch::CompilerBarrier();
         }
         return false;
     }
@@ -1236,7 +1237,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
                    && Timekeeping::GetMilliseconds() - waitStart < timeoutMs) {
                 Xhci::PollEvents();
                 Hci::DrainEvents();
-                for (int j = 0; j < 100; j++) asm volatile("pause" ::: "memory");
+                for (int j = 0; j < 100; j++) Arch::Pause();
             }
             return IsReady();
         }
@@ -1268,7 +1269,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
                 Hci::DrainEvents();
                 Hci::ProcessPendingCommands();
                 if (g_sigCid.load(std::memory_order_acquire) != 0) break;
-                for (int j = 0; j < 100; j++) asm volatile("" ::: "memory");
+                for (int j = 0; j < 100; j++) Arch::CompilerBarrier();
             }
         }
         if (g_sigCid.load(std::memory_order_acquire) != 0) {
@@ -1327,7 +1328,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
                 // timer.
                 if (L2cap::ConnRspResult(sig) == L2cap::CONN_PENDING)
                     waitBudgetMs = timeoutMs;
-                for (int j = 0; j < 100; j++) asm volatile("" ::: "memory");
+                for (int j = 0; j < 100; j++) Arch::CompilerBarrier();
             }
             uint16_t readySig = g_sigCid.load(std::memory_order_acquire);
             if (readySig != 0) {
@@ -1364,7 +1365,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
             while (Timekeeping::GetMilliseconds() - st < 400) {
                 Xhci::PollEvents();
                 Hci::DrainEvents();
-                for (int j = 0; j < 200; j++) asm volatile("pause" ::: "memory");
+                for (int j = 0; j < 200; j++) Arch::Pause();
             }
         }
 
@@ -1387,7 +1388,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
                 Hci::DrainEvents();
                 State s = g_state.load(std::memory_order_acquire);
                 if (s == State::Open || s == State::Streaming) break;
-                for (int j = 0; j < 100; j++) asm volatile("" ::: "memory");
+                for (int j = 0; j < 100; j++) Arch::CompilerBarrier();
             }
             State s = g_state.load(std::memory_order_acquire);
             if (s != State::Open && s != State::Streaming) {
@@ -1495,7 +1496,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
                 g_mediaCid.store(other, std::memory_order_release);
                 break;
             }
-            for (int j = 0; j < 100; j++) asm volatile("" ::: "memory");
+            for (int j = 0; j < 100; j++) Arch::CompilerBarrier();
         }
 
         if (g_mediaCid.load(std::memory_order_acquire) == 0) {
@@ -1879,7 +1880,7 @@ namespace Drivers::USB::Bluetooth::A2dp {
             if (g_serviceActive.compare_exchange_weak(expected, true,
                                                       std::memory_order_acquire))
                 return true;
-            asm volatile("pause" ::: "memory");
+            Arch::Pause();
         }
         return false;
     }