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Proper kernel

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JimmyBinoculars
2026-02-26 18:11:24 +00:00
parent f266dd7c8c
commit 4d447d3dec
7 changed files with 490 additions and 70 deletions
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140
kernel.c
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@@ -1,69 +1,109 @@
#include <efi.h>
#include "boot_info.h"
#include "commands.h"
#define SAFE_PRINT(Boot, ...) \
do { \
if ((Boot) != NULL && (Boot)->print != NULL) { \
(Boot)->print(__VA_ARGS__); \
} \
} while (0)
void kmain(BootInfo *Boot)
{
EFI_INPUT_KEY Key;
EFI_STATUS Status;
UINTN read_errors = 0;
Boot->clear_screen();
Boot->set_attribute(EFI_TEXT_ATTR(EFI_LIGHTGREEN, EFI_BLACK));
if (Boot == NULL) {
return;
}
Boot->print(L"================================================\n\r");
Boot->print(L" Welcome to Simple UEFI Operating System!\n\r");
Boot->print(L"================================================\n\r");
Boot->print(L"\n\r");
Boot->print(L"System Information:\n\r");
Boot->print(L" UEFI Firmware Vendor: %s\n\r", Boot->SystemTable->FirmwareVendor);
Boot->print(L" UEFI Firmware Revision: %d.%d\n\r",
Boot->SystemTable->FirmwareRevision >> 16,
Boot->SystemTable->FirmwareRevision & 0xFFFF);
Boot->print(L"\n\r");
if (Boot->clear_screen != NULL) {
Status = Boot->clear_screen();
if (EFI_ERROR(Status)) {
SAFE_PRINT(Boot, L"clear_screen failed: %r\n\r", Status);
}
}
Boot->print(L"Available Services:\n\r");
Boot->print(L" - Console Input/Output: Active\n\r");
Boot->print(L" - Runtime Services: Active\n\r");
Boot->print(L" - Boot Services: Active\n\r");
Boot->print(L"\n\r");
if (Boot->set_attribute != NULL) {
Status = Boot->set_attribute(EFI_TEXT_ATTR(EFI_LIGHTGREEN, EFI_BLACK));
if (EFI_ERROR(Status)) {
SAFE_PRINT(Boot, L"set_attribute failed: %r\n\r", Status);
}
}
Boot->print(L"Commands:\n\r");
Boot->print(L" 'h' - Display help\n\r");
Boot->print(L" 'i' - Display system info\n\r");
Boot->print(L" 'c' - Clear screen\n\r");
Boot->print(L" 'q' - Shutdown\n\r");
Boot->print(L"\n\r");
Boot->print(L"Press a key to start...\n\r");
SAFE_PRINT(Boot, L"================================================\n\r");
SAFE_PRINT(Boot, L" Welcome to Simple UEFI Operating System!\n\r");
SAFE_PRINT(Boot, L"================================================\n\r");
SAFE_PRINT(Boot, L"\n\r");
SAFE_PRINT(Boot, L"System Information:\n\r");
if (Boot->SystemTable != NULL) {
SAFE_PRINT(Boot, L" UEFI Firmware Vendor: %s\n\r",
Boot->SystemTable->FirmwareVendor);
SAFE_PRINT(Boot, L" UEFI Firmware Revision: %d.%d\n\r",
Boot->SystemTable->FirmwareRevision >> 16,
Boot->SystemTable->FirmwareRevision & 0xFFFF);
} else {
SAFE_PRINT(Boot, L" UEFI System Table: Unavailable\n\r");
}
SAFE_PRINT(Boot, L"\n\r");
SAFE_PRINT(Boot, L"Available Services:\n\r");
SAFE_PRINT(Boot, L" - Console Input/Output: %s\n\r",
(Boot->read_key != NULL && Boot->print != NULL) ? L"Active" : L"Unavailable");
SAFE_PRINT(Boot, L" - Runtime Services: %s\n\r",
(Boot->SystemTable != NULL &&
Boot->SystemTable->RuntimeServices != NULL) ? L"Active" : L"Unavailable");
SAFE_PRINT(Boot, L" - Boot Services: %s\n\r",
(Boot->SystemTable != NULL &&
Boot->SystemTable->BootServices != NULL) ? L"Active" : L"Unavailable");
SAFE_PRINT(Boot, L"\n\r");
SAFE_PRINT(Boot, L"Type 'help' for a list of commands.\n\r\n\r");
// Simple line buffer
CHAR16 line[128];
UINTN len = 0;
SAFE_PRINT(Boot, L"-> ");
while (TRUE) {
if (EFI_ERROR(Boot->read_key(&Key))) {
continue;
if (Boot->read_key == NULL) {
SAFE_PRINT(Boot, L"Console input unavailable.\n\r");
break;
}
if (Key.UnicodeChar == L'q' || Key.UnicodeChar == L'Q') {
Boot->print(L"\n\rShutting down...\n\r");
Boot->shutdown();
} else if (Key.UnicodeChar == L'h' || Key.UnicodeChar == L'H') {
Boot->print(L"\n\r=== Help ===\n\r");
Boot->print(L"This is a minimal UEFI operating system.\n\r");
Boot->print(L"It demonstrates basic UEFI functionality.\n\r");
Boot->print(L"\n\r");
} else if (Key.UnicodeChar == L'i' || Key.UnicodeChar == L'I') {
Boot->print(L"\n\r=== System Info ===\n\r");
Boot->print(L"Firmware Vendor: %s\n\r", Boot->SystemTable->FirmwareVendor);
Boot->print(L"Firmware Revision: %d.%d\n\r",
Boot->SystemTable->FirmwareRevision >> 16,
Boot->SystemTable->FirmwareRevision & 0xFFFF);
Boot->print(L"UEFI Specification: %d.%d\n\r",
Boot->SystemTable->Hdr.Revision >> 16,
Boot->SystemTable->Hdr.Revision & 0xFFFF);
Boot->print(L"\n\r");
} else if (Key.UnicodeChar == L'c' || Key.UnicodeChar == L'C') {
Boot->clear_screen();
Boot->print(L"Screen cleared. Press 'h' for help.\n\r");
Status = Boot->read_key(&Key);
if (EFI_ERROR(Status)) {
read_errors++;
if (read_errors == 1 || (read_errors % 64) == 0) {
SAFE_PRINT(Boot, L"read_key failed: %r\n\r", Status);
}
continue;
}
read_errors = 0;
if (Key.UnicodeChar == L'\r' || Key.UnicodeChar == L'\n') {
// Enter pressed: terminate string and handle
line[len] = L'\0';
SAFE_PRINT(Boot, L"\n\r");
execute_command(Boot, line);
// Reset for next command
len = 0;
SAFE_PRINT(Boot, L"-> ");
} else if (Key.UnicodeChar == L'\b' || Key.UnicodeChar == 0x7F) {
// Backspace
if (len > 0) {
len--;
SAFE_PRINT(Boot, L"\b \b");
}
} else if (Key.UnicodeChar >= 32 && Key.UnicodeChar < 127) {
Boot->print(L"%c", Key.UnicodeChar);
} else if (Key.UnicodeChar == L'\r') {
Boot->print(L"\n\r> ");
if (len < (sizeof(line) / sizeof(line[0]) - 1)) {
line[len++] = Key.UnicodeChar;
SAFE_PRINT(Boot, L"%c", Key.UnicodeChar);
}
}
}
}