From 5339d016c07bf717ee388f4feb73544087324af0 Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
Date: Sat, 6 Jan 2024 09:14:11 +0100
Subject: git: port from mercurial repo.

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
---
 HALKit/AMD64/PCI/Device.cpp | 127 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 HALKit/AMD64/PCI/Device.cpp

(limited to 'HALKit/AMD64/PCI/Device.cpp')

diff --git a/HALKit/AMD64/PCI/Device.cpp b/HALKit/AMD64/PCI/Device.cpp
new file mode 100644
index 00000000..4cd35636
--- /dev/null
+++ b/HALKit/AMD64/PCI/Device.cpp
@@ -0,0 +1,127 @@
+/*
+ *	========================================================
+ *
+ *	hCore
+ * 	Copyright Mahrouss Logic, all rights reserved.
+ *
+ * 	========================================================
+ */
+
+#include <ArchKit/Arch.hpp>
+#include <KernelKit/PCI/Device.hpp>
+
+
+hCore::UInt LumiaPCIReadRaw(hCore::UInt bar, hCore::UShort bus, hCore::UShort dev, hCore::UShort fun)
+{
+    hCore::UInt target = 0x80000000 | ((hCore::UInt) bus << 16) | ((hCore::UInt) dev << 11) | ((hCore::UInt) fun << 8) |
+                  (bar & 0xFC);
+
+    hCore::HAL::out32((hCore::UShort) hCore::PCI::PciConfigKind::ConfigAddress, target);
+
+    return hCore::HAL::in32((hCore::UShort) hCore::PCI::PciConfigKind::ConfigData);
+}
+
+void LumiaPCISetCfgTarget(hCore::UInt bar, hCore::UShort bus, hCore::UShort dev, hCore::UShort fun)
+{
+    hCore::UInt target =
+            0x80000000 | ((hCore::UInt) bus << 16) | ((hCore::UInt) dev << 11) | ((hCore::UInt) fun << 8) | (bar & ~3);
+
+    hCore::HAL::out32((hCore::UShort) hCore::PCI::PciConfigKind::ConfigAddress, target);
+}
+
+namespace hCore::PCI
+{
+    Device::Device(UShort bus, UShort device, UShort func, UShort bar)
+            : m_Bus(bus), m_Device(device), m_Function(func), m_Bar(bar)
+    {}
+
+    Device::~Device() {}
+
+    UInt Device::Read(UInt bar, Size sz)
+    {
+        LumiaPCISetCfgTarget(bar, m_Bus, m_Device, m_Function);
+
+        if (sz == 4)
+            return HAL::in32((UShort) PciConfigKind::ConfigData + (m_Bar & 3));
+        if (sz == 2)
+            return HAL::in16((UShort) PciConfigKind::ConfigData + (m_Bar & 3));
+        if (sz == 1)
+            return HAL::in8((UShort) PciConfigKind::ConfigData + (m_Bar & 3));
+
+        return 0xFFFF;
+    }
+
+    void Device::Write(UInt bar, UIntPtr data, Size sz)
+    {
+        LumiaPCISetCfgTarget(bar, m_Bus, m_Device, m_Function);
+
+        if (sz == 4)
+            HAL::out32((UShort) PciConfigKind::ConfigData + (m_Bar & 3), (UInt) data);
+        if (sz == 2)
+            HAL::out16((UShort) PciConfigKind::ConfigData + (m_Bar & 3), (UShort) data);
+        if (sz == 1)
+            HAL::out8((UShort) PciConfigKind::ConfigData + (m_Bar & 3), (UChar) data);
+    }
+
+    UShort Device::DeviceId()
+    {
+        return (UShort)(LumiaPCIReadRaw(0x0 >> 16, m_Bus, m_Device, m_Function));
+    }
+
+    UShort Device::VendorId()
+    {
+        return (UShort) (LumiaPCIReadRaw(0x0, m_Bus, m_Device, m_Function) >> 16);
+    }
+
+    UShort Device::InterfaceId()
+    {
+        return (UShort)(LumiaPCIReadRaw(0x0, m_Bus, m_Device, m_Function) >> 16);
+    }
+
+    UChar Device::Class()
+    {
+        return (UChar)(LumiaPCIReadRaw(0x08, m_Bus, m_Device, m_Function) >> 24);
+    }
+
+    UChar Device::Subclass()
+    {
+        return (UChar)(LumiaPCIReadRaw(0x08, m_Bus, m_Device, m_Function) >> 16);
+    }
+
+    UChar Device::ProgIf()
+    {
+        return (UChar)(LumiaPCIReadRaw(0x08, m_Bus, m_Device, m_Function) >> 8);
+    }
+
+    UChar Device::HeaderType()
+    {
+        return (UChar)(LumiaPCIReadRaw(0xC, m_Bus, m_Device, m_Function) >> 16);
+    }
+
+    void Device::EnableMmio()
+    {
+        bool enable = Read(0x04, sizeof(UChar)) | (1 << 1);
+        Write(0x04, enable, sizeof(UShort));
+    }
+
+    void Device::BecomeBusMaster()
+    {
+        bool enable = Read(0x04, sizeof(UShort)) | (1 << 2);
+        Write(0x04, enable, sizeof(UShort));
+    }
+
+    UShort Device::Vendor()
+    {
+        UShort vendor = VendorId();
+
+        if (vendor != (UShort) PciConfigKind::Invalid)
+            m_Device = (UShort) Read(0x0, sizeof(UShort));
+
+        return m_Device;
+    }
+
+    Device::operator bool()
+    {
+        return VendorId() != (UShort) PciConfigKind::Invalid;
+    }
+} // namespace hCore::PCI
-- 
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