From e31425df3877636c098ec7426ebd2067920715cb Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Mon, 24 Feb 2020 22:04:12 -0400
Subject: General: Recover Prometheus project from harddrive failure

This commit: Implements CPU Interrupts, Replaces Cycle Timing for Host
Timing, Reworks the Kernel's Scheduler, Introduce Idle State and
Suspended State, Recreates the bootmanager, Initializes Multicore
system.
---
 src/core/arm/unicorn/arm_unicorn.cpp | 14 +++++++++-----
 src/core/arm/unicorn/arm_unicorn.h   |  3 ++-
 2 files changed, 11 insertions(+), 6 deletions(-)

(limited to 'src/core/arm/unicorn')

diff --git a/src/core/arm/unicorn/arm_unicorn.cpp b/src/core/arm/unicorn/arm_unicorn.cpp
index e40e9626a..0393fe641 100644
--- a/src/core/arm/unicorn/arm_unicorn.cpp
+++ b/src/core/arm/unicorn/arm_unicorn.cpp
@@ -6,6 +6,7 @@
 #include <unicorn/arm64.h>
 #include "common/assert.h"
 #include "common/microprofile.h"
+#include "core/arm/cpu_interrupt_handler.h"
 #include "core/arm/unicorn/arm_unicorn.h"
 #include "core/core.h"
 #include "core/core_timing.h"
@@ -62,7 +63,8 @@ static bool UnmappedMemoryHook(uc_engine* uc, uc_mem_type type, u64 addr, int si
     return false;
 }
 
-ARM_Unicorn::ARM_Unicorn(System& system, Arch architecture) : ARM_Interface{system} {
+ARM_Unicorn::ARM_Unicorn(System& system, CPUInterruptHandler& interrupt_handler, Arch architecture)
+    : ARM_Interface{system, interrupt_handler} {
     const auto arch = architecture == Arch::AArch32 ? UC_ARCH_ARM : UC_ARCH_ARM64;
     CHECKED(uc_open(arch, UC_MODE_ARM, &uc));
 
@@ -160,8 +162,12 @@ void ARM_Unicorn::Run() {
     if (GDBStub::IsServerEnabled()) {
         ExecuteInstructions(std::max(4000000U, 0U));
     } else {
-        ExecuteInstructions(
-            std::max(std::size_t(system.CoreTiming().GetDowncount()), std::size_t{0}));
+        while (true) {
+            if (interrupt_handler.IsInterrupted()) {
+                return;
+            }
+            ExecuteInstructions(10);
+        }
     }
 }
 
@@ -183,8 +189,6 @@ void ARM_Unicorn::ExecuteInstructions(std::size_t num_instructions) {
                            UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC, page_buffer.data()));
     CHECKED(uc_emu_start(uc, GetPC(), 1ULL << 63, 0, num_instructions));
     CHECKED(uc_mem_unmap(uc, map_addr, page_buffer.size()));
-
-    system.CoreTiming().AddTicks(num_instructions);
     if (GDBStub::IsServerEnabled()) {
         if (last_bkpt_hit && last_bkpt.type == GDBStub::BreakpointType::Execute) {
             uc_reg_write(uc, UC_ARM64_REG_PC, &last_bkpt.address);
diff --git a/src/core/arm/unicorn/arm_unicorn.h b/src/core/arm/unicorn/arm_unicorn.h
index 725c65085..0a4c087cd 100644
--- a/src/core/arm/unicorn/arm_unicorn.h
+++ b/src/core/arm/unicorn/arm_unicorn.h
@@ -11,6 +11,7 @@
 
 namespace Core {
 
+class CPUInterruptHandler;
 class System;
 
 class ARM_Unicorn final : public ARM_Interface {
@@ -20,7 +21,7 @@ public:
         AArch64, // 64-bit ARM
     };
 
-    explicit ARM_Unicorn(System& system, Arch architecture);
+    explicit ARM_Unicorn(System& system, CPUInterruptHandler& interrupt_handler, Arch architecture);
     ~ARM_Unicorn() override;
 
     void SetPC(u64 pc) override;
-- 
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