From 0fa2cac4f0cdefaf1addd7f1fe0fd8113db9360b Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay@vrfy.org>
Date: Sun, 8 Feb 2015 12:25:35 +0100
Subject: sd-boot: add EFI boot manager and stub loader

---
 src/sd-boot/console.c | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 src/sd-boot/console.c

(limited to 'src/sd-boot/console.c')

diff --git a/src/sd-boot/console.c b/src/sd-boot/console.c
new file mode 100644
index 0000000000..6206c80317
--- /dev/null
+++ b/src/sd-boot/console.c
@@ -0,0 +1,141 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * Copyright (C) 2012-2013 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2012 Harald Hoyer <harald@redhat.com>
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+#include "util.h"
+#include "console.h"
+
+#define EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID \
+        { 0xdd9e7534, 0x7762, 0x4698, { 0x8c, 0x14, 0xf5, 0x85, 0x17, 0xa6, 0x25, 0xaa } }
+
+struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL;
+
+typedef EFI_STATUS (EFIAPI *EFI_INPUT_RESET_EX)(
+        struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This;
+        BOOLEAN ExtendedVerification;
+);
+
+typedef UINT8 EFI_KEY_TOGGLE_STATE;
+
+typedef struct {
+        UINT32 KeyShiftState;
+        EFI_KEY_TOGGLE_STATE KeyToggleState;
+} EFI_KEY_STATE;
+
+typedef struct {
+        EFI_INPUT_KEY Key;
+        EFI_KEY_STATE KeyState;
+} EFI_KEY_DATA;
+
+typedef EFI_STATUS (EFIAPI *EFI_INPUT_READ_KEY_EX)(
+        struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This;
+        EFI_KEY_DATA *KeyData;
+);
+
+typedef EFI_STATUS (EFIAPI *EFI_SET_STATE)(
+        struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This;
+        EFI_KEY_TOGGLE_STATE *KeyToggleState;
+);
+
+typedef EFI_STATUS (EFIAPI *EFI_KEY_NOTIFY_FUNCTION)(
+        EFI_KEY_DATA *KeyData;
+);
+
+typedef EFI_STATUS (EFIAPI *EFI_REGISTER_KEYSTROKE_NOTIFY)(
+        struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This;
+        EFI_KEY_DATA KeyData;
+        EFI_KEY_NOTIFY_FUNCTION KeyNotificationFunction;
+        VOID **NotifyHandle;
+);
+
+typedef EFI_STATUS (EFIAPI *EFI_UNREGISTER_KEYSTROKE_NOTIFY)(
+        struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This;
+        VOID *NotificationHandle;
+);
+
+typedef struct _EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL {
+        EFI_INPUT_RESET_EX Reset;
+        EFI_INPUT_READ_KEY_EX ReadKeyStrokeEx;
+        EFI_EVENT WaitForKeyEx;
+        EFI_SET_STATE SetState;
+        EFI_REGISTER_KEYSTROKE_NOTIFY RegisterKeyNotify;
+        EFI_UNREGISTER_KEYSTROKE_NOTIFY UnregisterKeyNotify;
+} EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL;
+
+EFI_STATUS console_key_read(UINT64 *key, BOOLEAN wait) {
+        EFI_GUID EfiSimpleTextInputExProtocolGuid = EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID;
+        static EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *TextInputEx;
+        static BOOLEAN checked;
+        UINTN index;
+        EFI_INPUT_KEY k;
+        EFI_STATUS err;
+
+        if (!checked) {
+                err = LibLocateProtocol(&EfiSimpleTextInputExProtocolGuid, (VOID **)&TextInputEx);
+                if (EFI_ERROR(err))
+                        TextInputEx = NULL;
+
+                checked = TRUE;
+        }
+
+        /* wait until key is pressed */
+        if (wait) {
+                if (TextInputEx)
+                        uefi_call_wrapper(BS->WaitForEvent, 3, 1, &TextInputEx->WaitForKeyEx, &index);
+                else
+                        uefi_call_wrapper(BS->WaitForEvent, 3, 1, &ST->ConIn->WaitForKey, &index);
+        }
+
+        if (TextInputEx) {
+                EFI_KEY_DATA keydata;
+                UINT64 keypress;
+
+                err = uefi_call_wrapper(TextInputEx->ReadKeyStrokeEx, 2, TextInputEx, &keydata);
+                if (!EFI_ERROR(err)) {
+                        UINT32 shift = 0;
+
+                        /* do not distinguish between left and right keys */
+                        if (keydata.KeyState.KeyShiftState & EFI_SHIFT_STATE_VALID) {
+                                if (keydata.KeyState.KeyShiftState & (EFI_RIGHT_CONTROL_PRESSED|EFI_LEFT_CONTROL_PRESSED))
+                                        shift |= EFI_CONTROL_PRESSED;
+                                if (keydata.KeyState.KeyShiftState & (EFI_RIGHT_ALT_PRESSED|EFI_LEFT_ALT_PRESSED))
+                                        shift |= EFI_ALT_PRESSED;
+                        };
+
+                        /* 32 bit modifier keys + 16 bit scan code + 16 bit unicode */
+                        keypress = KEYPRESS(shift, keydata.Key.ScanCode, keydata.Key.UnicodeChar);
+                        if (keypress > 0) {
+                                *key = keypress;
+                                return 0;
+                        }
+                }
+        }
+
+        /* fallback for firmware which does not support SimpleTextInputExProtocol
+         *
+         * This is also called in case ReadKeyStrokeEx did not return a key, because
+         * some broken firmwares offer SimpleTextInputExProtocol, but never acually
+         * handle any key. */
+        err  = uefi_call_wrapper(ST->ConIn->ReadKeyStroke, 2, ST->ConIn, &k);
+        if (EFI_ERROR(err))
+                return err;
+
+        *key = KEYPRESS(0, k.ScanCode, k.UnicodeChar);
+        return 0;
+}
-- 
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