Start EFI port

efi-port/core/src/efi.c

@@ -0,0 +1,6 @@
+#include "efi.h"
+#include "main.h"
+
+int efi_main(void *imageHandle, EfiSystemTable* systemTable) {
+    return kernel_main(systemTable);
+}

efi-port/core/src/efi.h

@@ -0,0 +1,49 @@
+#ifndef EFI_H
+#define EFI_H
+
+#include <stdint.h>
+
+typedef struct EfiTableHeader {
+    uint64_t  signature;
+    uint32_t  revision;
+    uint32_t  headerSize;
+    uint32_t  crc32;
+    uint32_t  reserved;
+} EfiTableHeader;
+
+struct EfiSimpleTextOutputProtocol;
+typedef uint64_t (__attribute__((ms_abi)) *EfiTextReset)(struct EfiSimpleTextOutputProtocol* this, uint8_t ExtendedVerification);
+typedef uint64_t (__attribute__((ms_abi)) *EfiTextString)(struct EfiSimpleTextOutputProtocol* this, uint16_t* string);
+typedef uint64_t (__attribute__((ms_abi)) *EfiTextSetAttribute)(struct EfiSimpleTextOutputProtocol* this, uint64_t Attribute);
+typedef uint64_t (__attribute__((ms_abi)) *EfiTextClearScreen)(struct EfiSimpleTextOutputProtocol* this);
+
+typedef struct EfiSimpleTextOutputProtocol {
+    EfiTextReset        reset;
+    EfiTextString       output_string;
+    uint64_t            test_string;
+    uint64_t            query_mode;
+    uint64_t            set_mode;
+    EfiTextSetAttribute set_attribute;
+    EfiTextClearScreen  clear_screen;
+    uint64_t            set_cursor_position;
+    uint64_t            enable_cursor;
+    uint64_t            mode;
+} EfiSimpleTextOutputProtocol;
+
+typedef struct EfiSystemTable {
+    EfiTableHeader               hdr;
+    uint16_t*                    firmwareVendor;
+    uint32_t                     firmwareRevision;
+    void*                        consoleInHandle;
+    uint64_t                     conIn;
+    void*                        consoleOutHandle;
+    EfiSimpleTextOutputProtocol* conOut;
+    void*                        standardErrorHandle;
+    uint64_t                     stdErr;
+    uint64_t                     runtimeServices;
+    uint64_t                     bootServices;
+    uint64_t                     numberOfTableEntries;
+    uint64_t                     configurationTable;
+} EfiSystemTable;
+
+#endif

efi-port/core/src/main.c

@@ -0,0 +1,15 @@
+#include "main.h" 
+#include "efi.h" 
+
+void halt() {
+  for (;;) {}
+}
+
+int kernel_main(EfiSystemTable* systemTable) {
+  systemTable->conOut->clear_screen(systemTable->conOut);
+  systemTable->conOut->output_string(systemTable->conOut, L"Hello, World!\n");
+
+  halt();
+
+  return 0;
+}

efi-port/core/src/main.h

@@ -0,0 +1,8 @@
+#include "efi.h"
+
+#ifndef MAIN_H
+#define MAIN_H
+
+int kernel_main(EfiSystemTable* systemTable);
+
+#endif