MHR-23: :boom:, refactors.

- Move NewBoot to /Boot, thus making Kernel directory only containing the kernel.

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>

10 files changed, 263 insertions, 0 deletions

diff --git a/Kernel/DriverKit/KernelCall.c b/Kernel/DriverKit/KernelCall.c
new file mode 100644
index 00000000..43f8f714
--- /dev/null
+++ b/Kernel/DriverKit/KernelCall.c
@@ -0,0 +1,25 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Definitions.
+
+------------------------------------------- */
+
+#include <DriverKit/KernelStd.h>
+#include <stdarg.h>
+
+DK_EXTERN __attribute__((naked)) void __kernelDispatchCall(int32_t cnt, ...);
+
+DK_EXTERN void* kernelCall(const char* kernelRpcName, int32_t cnt, ...)
+{
+	if (!kernelRpcName || cnt == 0)
+		return NIL;
+
+	va_list arg;
+	va_start(arg, cnt);
+
+	__kernelDispatchCall(cnt, arg);
+
+	va_end(arg);
+}
diff --git a/Kernel/DriverKit/KernelDev.c b/Kernel/DriverKit/KernelDev.c
new file mode 100644
index 00000000..3cf8e4ea
--- /dev/null
+++ b/Kernel/DriverKit/KernelDev.c
@@ -0,0 +1,37 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Text I/O.
+
+------------------------------------------- */
+
+#include <DriverKit/KernelDev.h>
+
+/// @brief Open a new binary device from path.
+DK_EXTERN kernelDeviceRef kernelOpenBinaryDevice(const char* devicePath)
+{
+	if (!devicePath)
+		return NIL;
+
+	return kernelCall("OpenBinaryDevice", 1, devicePath);
+}
+
+/// @brief Open a new character device from path.
+DK_EXTERN kernelDeviceRef kernelOpenCharDevice(const char* devicePath)
+{
+	if (!devicePath)
+		return NIL;
+
+	return kernelCall("OpenCharDevice", 1, devicePath);
+}
+
+/// @brief Close any device.
+/// @param device valid device.
+DK_EXTERN void kernelCloseDevice(kernelDeviceRef device)
+{
+	if (!device)
+		return;
+
+	kernelCall("CloseDevice", 1, device);
+}
diff --git a/Kernel/DriverKit/KernelDev.h b/Kernel/DriverKit/KernelDev.h
new file mode 100644
index 00000000..7ce833e5
--- /dev/null
+++ b/Kernel/DriverKit/KernelDev.h
@@ -0,0 +1,33 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Devices.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <DriverKit/KernelStd.h>
+
+struct _kernelDevice;
+
+/// @brief Kernel Device driver.
+typedef struct _kernelDevice
+{
+	char name[255];									 // the device name. Could be /./DEVICE_NAME/
+	int32_t (*read)();								 // read from device.
+	int32_t (*write)();								 // write to device.
+	struct _kernelDevice* (*open)(const char* path); // open device.
+	void (*close)(struct _kernelDevice* dev);		 // close device.
+} kernelDevice, *kernelDeviceRef;
+
+/// @brief Open a new binary device from path.
+DK_EXTERN kernelDeviceRef kernelOpenBinaryDevice(const char* devicePath);
+
+/// @brief Open a new character device from path.
+DK_EXTERN kernelDeviceRef kernelOpenCharDevice(const char* devicePath);
+
+/// @brief Close any device.
+/// @param device valid device.
+DK_EXTERN void kernelCloseDevice(kernelDeviceRef device);
diff --git a/Kernel/DriverKit/KernelDispatchCall.S b/Kernel/DriverKit/KernelDispatchCall.S
new file mode 100644
index 00000000..64b6663e
--- /dev/null
+++ b/Kernel/DriverKit/KernelDispatchCall.S
@@ -0,0 +1,21 @@
+.globl __kernelDispatchCall
+
+.section .text
+
+/* Really simple function, takes our va-list,
+    and brings it to the trap handler in the kernel. */
+
+#ifdef __x86_64__
+
+__kernelDispatchCall:
+    int $0x33
+    ret
+
+#elif defined(__powerpc64__)
+
+__kernelDispatchCall:
+    /* There is no specific interrupt request id for a system call in POWER. */
+    sc
+    blr
+
+#endif
diff --git a/Kernel/DriverKit/KernelPrint.c b/Kernel/DriverKit/KernelPrint.c
new file mode 100644
index 00000000..04be86fa
--- /dev/null
+++ b/Kernel/DriverKit/KernelPrint.c
@@ -0,0 +1,33 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Text I/O.
+
+------------------------------------------- */
+
+#include <DriverKit/KernelPrint.h>
+
+DK_EXTERN void kernelPrintChar(const char ch)
+{
+	kernelCall("WriteCharacter", 1, ch);
+}
+
+/// @brief print string to UART.
+/// @param message UART to transmit.
+DK_EXTERN void kernelPrintStr(const char* message)
+{
+	if (!message)
+		return;
+	if (*message == 0)
+		return;
+
+	size_t index = 0;
+	size_t len	 = kernelStringLength(message);
+
+	while (index < len)
+	{
+		kernelPrintChar(message[index]);
+		++index;
+	}
+}
diff --git a/Kernel/DriverKit/KernelPrint.h b/Kernel/DriverKit/KernelPrint.h
new file mode 100644
index 00000000..f40c8cea
--- /dev/null
+++ b/Kernel/DriverKit/KernelPrint.h
@@ -0,0 +1,18 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Text I/O.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <DriverKit/KernelString.h>
+
+/// @brief print character into UART.
+DK_EXTERN void kernelPrintChar(const char ch);
+
+/// @brief print string to UART.
+/// @param message UART to transmit.
+DK_EXTERN void kernelPrintStr(const char* message);
diff --git a/Kernel/DriverKit/KernelStd.h b/Kernel/DriverKit/KernelStd.h
new file mode 100644
index 00000000..8bc53d89
--- /dev/null
+++ b/Kernel/DriverKit/KernelStd.h
@@ -0,0 +1,22 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Definitions.
+
+------------------------------------------- */
+
+#pragma once
+
+#if defined(__cplusplus)
+#define DK_EXTERN extern "C"
+#define NIL		  nullptr
+#else
+#define DK_EXTERN extern
+#define NIL		  NULL
+#endif // defined(__cplusplus)
+
+#include <stdint.h>
+#include <stddef.h>
+
+DK_EXTERN void* kernelCall(const char* kernelRpcName, int32_t cnt, ...);
diff --git a/Kernel/DriverKit/KernelStdCxx.cc b/Kernel/DriverKit/KernelStdCxx.cc
new file mode 100644
index 00000000..99bcc579
--- /dev/null
+++ b/Kernel/DriverKit/KernelStdCxx.cc
@@ -0,0 +1,24 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Driver C++ Definitions.
+
+------------------------------------------- */
+
+#include <DriverKit/KernelStd.h>
+
+void* operator new(size_t sz) {
+    if (!sz) ++sz;
+
+    auto ptr = kernelCall("NewKernelHeap", 1, sz);
+    kernelCall("KernelHeapProtect", 1, ptr);
+
+    return ptr;
+}
+
+void operator delete(void* ptr) noexcept {
+    if (!ptr) return;
+
+    kernelCall("DeleteKernelHeap", 1,ptr);
+}
diff --git a/Kernel/DriverKit/KernelString.c b/Kernel/DriverKit/KernelString.c
new file mode 100644
index 00000000..4a5af99a
--- /dev/null
+++ b/Kernel/DriverKit/KernelString.c
@@ -0,0 +1,34 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Strings.
+
+------------------------------------------- */
+
+#include <DriverKit/KernelString.h>
+
+DK_EXTERN size_t kernelStringLength(const char* str)
+{
+	size_t index = 0;
+
+	while (str[index] != 0)
+	{
+		++index;
+	}
+
+	return index;
+}
+
+DK_EXTERN int kernelStringCopy(char* dst, const char* src, size_t len)
+{
+	size_t index = 0;
+
+	while (index != len)
+	{
+		dst[index] = src[index];
+		++index;
+	}
+
+	return index;
+}
diff --git a/Kernel/DriverKit/KernelString.h b/Kernel/DriverKit/KernelString.h
new file mode 100644
index 00000000..a9d592e4
--- /dev/null
+++ b/Kernel/DriverKit/KernelString.h
@@ -0,0 +1,16 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    Purpose: Kernel Strings.
+
+------------------------------------------- */
+
+#pragma once
+
+#include <DriverKit/KernelStd.h>
+
+/// @brief DriverKit equivalent of POSIX's string.h.
+
+DK_EXTERN size_t kernelStringLength(const char* str);
+DK_EXTERN int	 kernelStringCopy(char* dst, const char* src, size_t len);