Added bridging header for swift

c structures are now exposed to swift using a bridging header.
it is possible to access bootinfo using the structure (as oppossed to doing bytesfifts blind)
tested on aarch64 apple.
please test on other systems

Kernel/CMakeLists.txt

@@ -70,6 +70,8 @@ add_custom_command(
         -wmo
         -O
         -Xcc -fno-stack-protector
+        -Xcc -I${CMAKE_CURRENT_SOURCE_DIR}/../Common
+        -import-bridging-header ${CMAKE_CURRENT_SOURCE_DIR}/Source/BridgingHeader.h
         -resource-dir ${SWIFT_RESOURCE_DIR}
         -c ${SWIFT_SOURCES}
         -o ${SWIFT_OBJ}

Kernel/Source/BridgingHeader.h

@@ -0,0 +1 @@
+#include "bootinfo.h"

Kernel/Source/kernel.swift

@@ -1,12 +1,10 @@
 @_cdecl("kmain")
-public func kernelMain(_ bootInfo: UInt) {
-    // Bootinfo offsets: fb starts at 64, then base(8), baseSize(8), width(8), height(8)
-    let fbBase = UnsafePointer<UInt>(bitPattern: bootInfo &+ 64)!.pointee
-    let width  = UnsafePointer<UInt64>(bitPattern: bootInfo &+ 80)!.pointee
-    let height = UnsafePointer<UInt64>(bitPattern: bootInfo &+ 88)!.pointee
-
-    let pixels = UnsafeMutablePointer<UInt32>(bitPattern: fbBase)!
-    let total  = Int(width) &* Int(height)
+public func kernelMain(_ bootInfo: UnsafeMutablePointer<Bootinfo>) {
+    let fb = bootInfo.pointee.framebuffer
+    let pixels = fb.base!
+    let width  = Int(fb.width)
+    let height = Int(fb.height)
+    let total  = width * height
     let stripe = total / 5
 
     var i = 0
@@ -15,7 +13,7 @@ public func kernelMain(_ bootInfo: UInt) {
         let color: UInt32
         if s == 0 || s >= 4 { color = 0x5BCEFA }
         else if s == 2      { color = 0xFFFFFF  }
-        else                 { color = 0xF5A7B8  }
+        else                { color = 0xF5A7B8  }
         pixels[i] = color
         i &+= 1
     }