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-rw-r--r--include/efi_loader.h5
-rw-r--r--lib/efi_loader/efi_console.c360
2 files changed, 365 insertions, 0 deletions
diff --git a/include/efi_loader.h b/include/efi_loader.h
index adb3315..d9e9d8f 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -32,6 +32,11 @@
extern struct efi_system_table systab;
+extern const struct efi_simple_text_output_protocol efi_con_out;
+extern const struct efi_simple_input_interface efi_con_in;
+extern const struct efi_console_control_protocol efi_console_control;
+
+extern const efi_guid_t efi_guid_console_control;
extern const efi_guid_t efi_guid_device_path;
extern const efi_guid_t efi_guid_loaded_image;
diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
new file mode 100644
index 0000000..2e0228c
--- /dev/null
+++ b/lib/efi_loader/efi_console.c
@@ -0,0 +1,360 @@
+/*
+ * EFI application console interface
+ *
+ * Copyright (c) 2016 Alexander Graf
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <efi_loader.h>
+
+/* If we can't determine the console size, default to 80x24 */
+static int console_columns = 80;
+static int console_rows = 24;
+static bool console_size_queried;
+
+const efi_guid_t efi_guid_console_control = CONSOLE_CONTROL_GUID;
+
+#define cESC '\x1b'
+#define ESC "\x1b"
+
+static efi_status_t EFIAPI efi_cin_get_mode(
+ struct efi_console_control_protocol *this,
+ int *mode, char *uga_exists, char *std_in_locked)
+{
+ EFI_ENTRY("%p, %p, %p, %p", this, mode, uga_exists, std_in_locked);
+
+ if (mode)
+ *mode = EFI_CONSOLE_MODE_TEXT;
+ if (uga_exists)
+ *uga_exists = 0;
+ if (std_in_locked)
+ *std_in_locked = 0;
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI efi_cin_set_mode(
+ struct efi_console_control_protocol *this, int mode)
+{
+ EFI_ENTRY("%p, %d", this, mode);
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI efi_cin_lock_std_in(
+ struct efi_console_control_protocol *this,
+ uint16_t *password)
+{
+ EFI_ENTRY("%p, %p", this, password);
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+const struct efi_console_control_protocol efi_console_control = {
+ .get_mode = efi_cin_get_mode,
+ .set_mode = efi_cin_set_mode,
+ .lock_std_in = efi_cin_lock_std_in,
+};
+
+static struct simple_text_output_mode efi_con_mode = {
+ .max_mode = 0,
+ .mode = 0,
+ .attribute = 0,
+ .cursor_column = 0,
+ .cursor_row = 0,
+ .cursor_visible = 1,
+};
+
+static int term_read_reply(int *n, int maxnum, char end_char)
+{
+ char c;
+ int i = 0;
+
+ c = getc();
+ if (c != cESC)
+ return -1;
+ c = getc();
+ if (c != '[')
+ return -1;
+
+ n[0] = 0;
+ while (1) {
+ c = getc();
+ if (c == ';') {
+ i++;
+ if (i >= maxnum)
+ return -1;
+ n[i] = 0;
+ continue;
+ } else if (c == end_char) {
+ break;
+ } else if (c > '9' || c < '0') {
+ return -1;
+ }
+
+ /* Read one more decimal position */
+ n[i] *= 10;
+ n[i] += c - '0';
+ }
+
+ return 0;
+}
+
+static efi_status_t EFIAPI efi_cout_reset(
+ struct efi_simple_text_output_protocol *this,
+ char extended_verification)
+{
+ EFI_ENTRY("%p, %d", this, extended_verification);
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static void print_unicode_in_utf8(u16 c)
+{
+ char utf8[4] = { 0 };
+ char *b = utf8;
+
+ if (c < 0x80) {
+ *(b++) = c;
+ } else if (c < 0x800) {
+ *(b++) = 192 + c / 64;
+ *(b++) = 128 + c % 64;
+ } else {
+ *(b++) = 224 + c / 4096;
+ *(b++) = 128 + c / 64 % 64;
+ *(b++) = 128 + c % 64;
+ }
+
+ puts(utf8);
+}
+
+static efi_status_t EFIAPI efi_cout_output_string(
+ struct efi_simple_text_output_protocol *this,
+ const unsigned short *string)
+{
+ u16 ch;
+
+ EFI_ENTRY("%p, %p", this, string);
+ for (;(ch = *string); string++) {
+ print_unicode_in_utf8(ch);
+ efi_con_mode.cursor_column++;
+ if (ch == '\n') {
+ efi_con_mode.cursor_column = 1;
+ efi_con_mode.cursor_row++;
+ } else if (efi_con_mode.cursor_column > console_columns) {
+ efi_con_mode.cursor_column = 1;
+ efi_con_mode.cursor_row++;
+ }
+ if (efi_con_mode.cursor_row > console_rows) {
+ efi_con_mode.cursor_row = console_rows;
+ }
+ }
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI efi_cout_test_string(
+ struct efi_simple_text_output_protocol *this,
+ const unsigned short *string)
+{
+ EFI_ENTRY("%p, %p", this, string);
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI efi_cout_query_mode(
+ struct efi_simple_text_output_protocol *this,
+ unsigned long mode_number, unsigned long *columns,
+ unsigned long *rows)
+{
+ EFI_ENTRY("%p, %ld, %p, %p", this, mode_number, columns, rows);
+
+ if (!console_size_queried) {
+ /* Ask the terminal about its size */
+ int n[3];
+ u64 timeout;
+
+ console_size_queried = true;
+
+ /* Empty input buffer */
+ while (tstc())
+ getc();
+
+ printf(ESC"[18t");
+
+ /* Check if we have a terminal that understands */
+ timeout = timer_get_us() + 1000000;
+ while (!tstc())
+ if (timer_get_us() > timeout)
+ goto out;
+
+ /* Read {depth,rows,cols} */
+ if (term_read_reply(n, 3, 't')) {
+ goto out;
+ }
+
+ console_columns = n[2];
+ console_rows = n[1];
+ }
+
+out:
+ if (columns)
+ *columns = console_columns;
+ if (rows)
+ *rows = console_rows;
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI efi_cout_set_mode(
+ struct efi_simple_text_output_protocol *this,
+ unsigned long mode_number)
+{
+ EFI_ENTRY("%p, %ld", this, mode_number);
+
+ /* We only support text output for now */
+ if (mode_number == EFI_CONSOLE_MODE_TEXT)
+ return EFI_EXIT(EFI_SUCCESS);
+
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI efi_cout_set_attribute(
+ struct efi_simple_text_output_protocol *this,
+ unsigned long attribute)
+{
+ EFI_ENTRY("%p, %lx", this, attribute);
+
+ /* Just ignore attributes (colors) for now */
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI efi_cout_clear_screen(
+ struct efi_simple_text_output_protocol *this)
+{
+ EFI_ENTRY("%p", this);
+
+ printf(ESC"[2J");
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI efi_cout_set_cursor_position(
+ struct efi_simple_text_output_protocol *this,
+ unsigned long column, unsigned long row)
+{
+ EFI_ENTRY("%p, %ld, %ld", this, column, row);
+
+ printf(ESC"[%d;%df", (int)row, (int)column);
+ efi_con_mode.cursor_column = column;
+ efi_con_mode.cursor_row = row;
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t EFIAPI efi_cout_enable_cursor(
+ struct efi_simple_text_output_protocol *this,
+ bool enable)
+{
+ EFI_ENTRY("%p, %d", this, enable);
+
+ printf(ESC"[?25%c", enable ? 'h' : 'l');
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+const struct efi_simple_text_output_protocol efi_con_out = {
+ .reset = efi_cout_reset,
+ .output_string = efi_cout_output_string,
+ .test_string = efi_cout_test_string,
+ .query_mode = efi_cout_query_mode,
+ .set_mode = efi_cout_set_mode,
+ .set_attribute = efi_cout_set_attribute,
+ .clear_screen = efi_cout_clear_screen,
+ .set_cursor_position = efi_cout_set_cursor_position,
+ .enable_cursor = efi_cout_enable_cursor,
+ .mode = (void*)&efi_con_mode,
+};
+
+static efi_status_t EFIAPI efi_cin_reset(
+ struct efi_simple_input_interface *this,
+ bool extended_verification)
+{
+ EFI_ENTRY("%p, %d", this, extended_verification);
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static efi_status_t EFIAPI efi_cin_read_key_stroke(
+ struct efi_simple_input_interface *this,
+ struct efi_input_key *key)
+{
+ struct efi_input_key pressed_key = {
+ .scan_code = 0,
+ .unicode_char = 0,
+ };
+ char ch;
+
+ EFI_ENTRY("%p, %p", this, key);
+
+ /* We don't do interrupts, so check for timers cooperatively */
+ efi_timer_check();
+
+ if (!tstc()) {
+ /* No key pressed */
+ return EFI_EXIT(EFI_NOT_READY);
+ }
+
+ ch = getc();
+ if (ch == cESC) {
+ /* Escape Sequence */
+ ch = getc();
+ switch (ch) {
+ case cESC: /* ESC */
+ pressed_key.scan_code = 23;
+ break;
+ case 'O': /* F1 - F4 */
+ pressed_key.scan_code = getc() - 'P' + 11;
+ break;
+ case 'a'...'z':
+ ch = ch - 'a';
+ break;
+ case '[':
+ ch = getc();
+ switch (ch) {
+ case 'A'...'D': /* up, down right, left */
+ pressed_key.scan_code = ch - 'A' + 1;
+ break;
+ case 'F': /* End */
+ pressed_key.scan_code = 6;
+ break;
+ case 'H': /* Home */
+ pressed_key.scan_code = 5;
+ break;
+ case '1': /* F5 - F8 */
+ pressed_key.scan_code = getc() - '0' + 11;
+ getc();
+ break;
+ case '2': /* F9 - F12 */
+ pressed_key.scan_code = getc() - '0' + 19;
+ getc();
+ break;
+ case '3': /* DEL */
+ pressed_key.scan_code = 8;
+ getc();
+ break;
+ }
+ break;
+ }
+ } else if (ch == 0x7f) {
+ /* Backspace */
+ ch = 0x08;
+ }
+ pressed_key.unicode_char = ch;
+ *key = pressed_key;
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+const struct efi_simple_input_interface efi_con_in = {
+ .reset = efi_cin_reset,
+ .read_key_stroke = efi_cin_read_key_stroke,
+ .wait_for_key = NULL,
+};
generated by cgit v1.1 at 2024-11-27 22:20:17 +0000