Add PCI driver

src/core/efi.h

@@ -1,11 +1,31 @@
 #ifndef EFI_H
 #define EFI_H
+
+#include <stdint.h>
+
 #define NULL ((void*)0)
 
-// EFI definitions
+// Basic Types
+typedef uint64_t UINT64;
+typedef uint32_t UINT32;
+typedef uint16_t UINT16;
+typedef uint8_t  UINT8;
+typedef uintptr_t UINTN;
+typedef intptr_t  INTN;
+typedef void     VOID;
+
 typedef uint64_t EFI_STATUS;
 typedef void* EFI_HANDLE;
+
 #define EFI_SUCCESS 0
+#define EFI_ERROR(status) (((INTN)(status)) < 0)
+
+typedef struct {
+    UINT32  Data1;
+    UINT16  Data2;
+    UINT16  Data3;
+    UINT8   Data4[8];
+} EFI_GUID;
 
 typedef struct {
     uint64_t signature;
@@ -15,6 +35,7 @@ typedef struct {
     uint32_t reserved;
 } EFI_TABLE_HEADER;
 
+// Simple Text Output Protocol
 struct EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL;
 typedef EFI_STATUS (*EFI_TEXT_STRING)(
     struct EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,
@@ -38,6 +59,112 @@ typedef struct EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL {
     void *mode;
 } EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL;
 
+// Boot Services
+typedef struct {
+    EFI_TABLE_HEADER Hdr;
+    void *RaiseTPL;
+    void *RestoreTPL;
+    void *AllocatePages;
+    void *FreePages;
+    void *GetMemoryMap;
+    void *AllocatePool;
+    void *FreePool;
+    void *CreateEvent;
+    void *SetTimer;
+    void *WaitForEvent;
+    void *SignalEvent;
+    void *CloseEvent;
+    void *CheckEvent;
+    void *InstallProtocolInterface;
+    void *ReinstallProtocolInterface;
+    void *UninstallProtocolInterface;
+    void *HandleProtocol;
+    void *Reserved;
+    void *RegisterProtocolNotify;
+    void *LocateHandle;
+    void *LocateDevicePath;
+    void *InstallConfigurationTable;
+    void *LoadImage;
+    void *StartImage;
+    void *Exit;
+    void *UnloadImage;
+    void *ExitBootServices;
+    void *GetNextMonotonicCount;
+    void *Stall;
+    void *SetWatchdogTimer;
+    void *ConnectController;
+    void *DisconnectController;
+    void *OpenProtocol;
+    void *CloseProtocol;
+    void *OpenProtocolInformation;
+    void *ProtocolsPerHandle;
+    void *LocateHandleBuffer;
+    EFI_STATUS (*LocateProtocol)(EFI_GUID *Protocol, void *Registration, void **Interface);
+    void *InstallMultipleProtocolInterfaces;
+    void *UninstallMultipleProtocolInterfaces;
+    void *CalculateCrc32;
+    void *CopyMem;
+    void *SetMem;
+    void *CreateEventEx;
+} EFI_BOOT_SERVICES;
+
+// PCI Root Bridge IO Protocol
+#define EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_GUID \
+    { 0x2f707ebb, 0x4a1a, 0x11d4, {0x9a, 0x38, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d} }
+
+typedef enum {
+  EfiPciWidthUint8,
+  EfiPciWidthUint16,
+  EfiPciWidthUint32,
+  EfiPciWidthUint64,
+  EfiPciWidthFifoUint8,
+  EfiPciWidthFifoUint16,
+  EfiPciWidthFifoUint32,
+  EfiPciWidthFifoUint64,
+  EfiPciWidthFillUint8,
+  EfiPciWidthFillUint16,
+  EfiPciWidthFillUint32,
+  EfiPciWidthFillUint64,
+  EfiPciWidthMaximum
+} EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH;
+
+typedef struct _EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL;
+
+typedef
+EFI_STATUS
+(*EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_IO_MEM) (
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL  *This,
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH  Width,
+  UINT64                                 Address,
+  UINTN                                  Count,
+  VOID                                   *Buffer
+  );
+
+typedef struct {
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_IO_MEM  Read;
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_IO_MEM  Write;
+} EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS;
+
+struct _EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL {
+  void *ParentHandle;
+  void *PollMem;
+  void *PollIo;
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS Mem;
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS Io;
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS Pci;
+  void *CopyMem;
+  void *Map;
+  void *Unmap;
+  void *AllocateBuffer;
+  void *FreeBuffer;
+  void *Flush;
+  void *GetAttributes;
+  void *SetAttributes;
+  void *Configuration;
+  UINT32 SegmentNumber;
+};
+
+// System Table
 typedef struct EFI_SYSTEM_TABLE {
     EFI_TABLE_HEADER hdr;
     uint16_t *firmwareVendor;
@@ -49,8 +176,9 @@ typedef struct EFI_SYSTEM_TABLE {
     void *standardErrorHandle;
     void *stdErr;
     void *runtimeServices;
-    void *bootServices;
+    EFI_BOOT_SERVICES *BootServices;
     uint64_t numberOfTableEntries;
     void *configurationTable;
 } EFI_SYSTEM_TABLE;
+
 #endif

src/core/main.c

@@ -99,6 +99,28 @@ JSValue jsKCClearScreen(JSContext *ctx, JSValueConst jsThis, int argc, JSValueCo
   return JS_UNDEFINED;
 }
 
+JSValue jsKCPCIReadDword(JSContext *ctx, JSValueConst jsThis, int argc, JSValueConst *argv) {
+  if (argc < 1) return JS_ThrowSyntaxError(ctx, "Missing argument");
+
+  uint32_t addr_u32;
+  JS_ToUint32(ctx, &addr_u32, argv[0]);
+  UINT64 addr = (UINT64)addr_u32; // Ensure type matches EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_PCI_RW's Address parameter
+
+  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL* pci;
+  EFI_GUID pciGuid = EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_GUID;
+  EFI_STATUS status = gST->BootServices->LocateProtocol(&pciGuid, NULL, (void**)&pci);
+
+  if (EFI_ERROR(status)) {
+    return JS_ThrowInternalError(ctx, "Failed to locate PCI Root Bridge IO Protocol: %d", status);
+  }
+
+  UINT32 data = 0;
+
+  status = pci->Pci.Read(pci, EfiPciWidthUint32, addr, 1, &data);
+
+  return JS_NewUint32(ctx, data);
+}
+
 void initKC(JSContext *ctx) {
   JSValue global = JS_GetGlobalObject(ctx);
   JSValue kc = JS_NewObject(ctx);
@@ -107,6 +129,7 @@ void initKC(JSContext *ctx) {
 
   JS_SetPropertyStr(ctx, kc, "println", JS_NewCFunction(ctx, jsKCPrintln, "println", 1));
   JS_SetPropertyStr(ctx, kc, "clearScreen", JS_NewCFunction(ctx, jsKCClearScreen, "clearScreen", 0));
+  JS_SetPropertyStr(ctx, kc, "pciReadDword", JS_NewCFunction(ctx, jsKCPCIReadDword, "pciReadDword", 1));
 
   JS_FreeValue(ctx, global);
 }

src/system/src/kernel/drivers/dev/pci.drv.ts

@@ -0,0 +1,82 @@
+import { Logger } from "../../../lib/logger";
+import { numtohex } from "../../../util/hex";
+import { SysFS } from "../../filesystem/sys.fs";
+import { KernelDriver } from "../kdriver";
+
+export class PCIKDriver extends KernelDriver {
+  static instance: PCIKDriver = new this();
+
+  constructor() {
+    super("pci");
+  }
+
+  static init() {
+    PCIKDriver.instance.init();
+  }
+
+  override init() {
+    super.init();
+
+    SysFS.instance.pMkdir("/pci");
+    this.#detectDevices();
+  }
+
+  #detectDevices() {
+    Logger.log("[PCI] Scanning...");
+
+    for (let bus = 0; bus < 256; bus++) {
+      for (let device = 0; device < 32; device++) {
+        this.#checkDevice(bus, device, 0);
+      }
+    }
+  }
+
+  #checkDevice(bus: number, device: number, func: number) {
+    const data = this.#readConfig(bus, device, func, 0);
+    if (data === 0 || data === 0xffffffff) return;
+
+    const vendorId = this.#getDeviceVendorId(bus, device, func);
+    const deviceId = this.#getDeviceId(bus, device, func);
+    const classId = this.#getDeviceClass(bus, device, func);
+    const subclassId = this.#getDeviceSubclass(bus, device, func);
+
+    const filename = `pci.${bus}.${device}.${func}`;
+
+    Logger.log(
+      `[PCI] Found device: ${filename} (vendor: ${numtohex(
+        vendorId
+      )}, device: ${numtohex(deviceId)}, class: ${numtohex(
+        classId
+      )}, subclass: ${numtohex(subclassId)})`
+    );
+
+    SysFS.instance.pMkdir(`/pci/${filename}`);
+    SysFS.instance.pWriteFile(`/pci/${filename}/vendor`, numtohex(vendorId));
+    SysFS.instance.pWriteFile(`/pci/${filename}/device`, numtohex(deviceId));
+    SysFS.instance.pWriteFile(`/pci/${filename}/class`, numtohex(classId));
+    SysFS.instance.pWriteFile(
+      `/pci/${filename}/subclass`,
+      numtohex(subclassId)
+    );
+  }
+
+  #getDeviceId(bus: number, device: number, func: number) {
+    return this.#readConfig(bus, device, func, 0) >>> 16;
+  }
+
+  #getDeviceVendorId(bus: number, device: number, func: number) {
+    return this.#readConfig(bus, device, func, 0) & 0xffff;
+  }
+
+  #getDeviceClass(bus: number, device: number, func: number) {
+    return (this.#readConfig(bus, device, func, 8) >> 24) & 0xff;
+  }
+
+  #getDeviceSubclass(bus: number, device: number, func: number) {
+    return (this.#readConfig(bus, device, func, 8) >> 16) & 0xff;
+  }
+
+  #readConfig(bus: number, device: number, func: number, offset: number) {
+    return kc.pciReadDword((bus << 16) | (device << 11) | (func << 8) | offset);
+  }
+}

src/system/src/kernel/drivers/kdriver.ts

@@ -0,0 +1,20 @@
+import { Logger } from "../../lib/logger";
+
+export class KernelDriver {
+  #name: string;
+  #initialized: boolean = false;
+
+  constructor(name: string) {
+    this.#name = name;
+  }
+
+  init() {
+    Logger.log(`[Kernel] Initializing ${this.#name} driver...`);
+
+    this.#initialized = true;
+  }
+
+  get initialized() {
+    return this.#initialized;
+  }
+}

src/system/src/kernel/index.ts

@@ -1,6 +1,7 @@
 import { Logger } from "../lib/logger";
 import { SysFS } from "./filesystem/sys.fs";
 import { ConsoleKModule } from "./modules/console/console.kmod";
+import { DriverKModule } from "./modules/driver";
 import { VFSKModule } from "./modules/vfs/vfs.kmod";
 
 export function KMain() {
@@ -8,11 +9,9 @@ export function KMain() {
   Logger.log("[Kernel] Initializing kernel...");
 
   ConsoleKModule.init();
+
   VFSKModule.init();
   VFSKModule.instance.mount(SysFS.instance, "/sys");
 
-  SysFS.instance.pMkdir("/pci");
-  SysFS.instance.pWriteFile("/pci/test", "test");
-
-  Logger.log(SysFS.instance.readFile("/pci/test"));
+  DriverKModule.init();
 }

src/system/src/kernel/modules/driver.ts

@@ -0,0 +1,25 @@
+import { PCIKDriver } from "../drivers/dev/pci.drv";
+import type { KernelDriver } from "../drivers/kdriver";
+import { KernelModule } from "./kmod";
+
+export const DRIVERS: KernelDriver[] = [PCIKDriver.instance];
+
+export class DriverKModule extends KernelModule {
+  static instance: DriverKModule = new this();
+
+  constructor() {
+    super("driver");
+  }
+
+  static init() {
+    DriverKModule.instance.init();
+  }
+
+  override init() {
+    super.init();
+
+    for (const driver of DRIVERS) {
+      driver.init();
+    }
+  }
+}

src/system/src/kernel/modules/vfs/vfs.kmod.ts

@@ -18,7 +18,7 @@ export class VFSKModule extends KernelModule {
   mount(fs: FileSystem, mountPoint: string) {
     if (!this.initialized) return;
 
-    Logger.log(`Mounting ${fs.id} at ${mountPoint}`);
+    Logger.log(`[VFS] Mounting ${fs.id} at ${mountPoint}`);
     this.#mounts.set(mountPoint, fs);
   }
 

src/system/src/types/kc.d.ts

@@ -1,4 +1,5 @@
 declare namespace kc {
   function println(msg: string): void;
   function clearScreen(): void;
+  function pciReadDword(addr: number): number;
 }

src/system/src/util/hex.ts

@@ -0,0 +1,3 @@
+export function numtohex(num: number) {
+  return num.toString(16);
+}