[feat] Serial output

2026-05-10 20:06:17 +08:00
parent 4433d2ef85
commit e6ccc7cbcf
6 changed files with 111 additions and 7 deletions
@@ -0,0 +1,40 @@
+#include <serial.h>
+#include <efilib.h>
+
+serial_context g_serial;
+
+void serial_init(EFI_SERIAL_IO_PROTOCOL *SerialIo) {
+    g_serial.SerialIo = SerialIo;
+    uefi_call_wrapper((void*)SerialIo->Reset, 1, SerialIo);
+}
+
+void serial_write_char(char c) {
+    if (!g_serial.SerialIo) {
+        uefi_call_wrapper((void*)ST->ConOut->OutputString, 2, ST->ConOut, L"serial: null io\n");
+        return;
+    }
+    UINTN size = 1;
+    EFI_STATUS status = uefi_call_wrapper((void*)g_serial.SerialIo->Write, 3, g_serial.SerialIo, &size, &c);
+    if (status != EFI_SUCCESS) {
+        uefi_call_wrapper((void*)ST->ConOut->OutputString, 2, ST->ConOut, L"serial: write failed\n");
+    }
+}
+
+void serial_write(const char *str) {
+    if (!g_serial.SerialIo) {
+        uefi_call_wrapper((void*)ST->ConOut->OutputString, 2, ST->ConOut, L"serial: null io\n");
+        return;
+    }
+    while (*str) {
+        serial_write_char(*str++);
+    }
+}
+
+char serial_read_char() {
+    if (!g_serial.SerialIo) return 0;
+    char c = 0;
+    UINTN size = 1;
+    EFI_STATUS status = uefi_call_wrapper((void*)g_serial.SerialIo->Read, 3, g_serial.SerialIo, &size, &c);
+    if (status != EFI_SUCCESS || size == 0) return 0;
+    return c;
+}