diff mbox series

[v2,3/3] eficonfig: add vertical scroll support

Message ID 20221223225745.16985-4-masahisa.kojima@linaro.org
State Superseded
Headers show
Series eficonfig: add vertical scroll support | expand

Commit Message

Masahisa Kojima Dec. 23, 2022, 10:57 p.m. UTC 
The current eficonfig menu does not support vertical scroll,
so it can not display the menu entries greater than
the console row size.

This commit add the vertial scroll support.
The console size is retrieved by
SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode() service, then
calculates the row size for menu entry by subtracting
menu header and description row size from the console row size.
"start" and "end" are added in the efimenu structure.
"start" keeps the menu entry index at the top, "end" keeps
the bottom menu entry index. item_data_print() menu function
only draws the menu entry between "start" and "end".

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
---
No update since v1

 cmd/eficonfig.c      | 79 ++++++++++++++++++++++++++++++++++++--------
 include/efi_config.h |  4 +++
 include/efi_loader.h |  1 +
 3 files changed, 70 insertions(+), 14 deletions(-)

Comments

Ilias Apalodimas Dec. 27, 2022, 2:55 p.m. UTC | #1 
This looks correct to me.
Heinrich can you check if that solves your scrolling issues?

On Sat, Dec 24, 2022 at 07:57:44AM +0900, Masahisa Kojima wrote:
> The current eficonfig menu does not support vertical scroll,
> so it can not display the menu entries greater than
> the console row size.
>
> This commit add the vertial scroll support.
> The console size is retrieved by
> SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode() service, then
> calculates the row size for menu entry by subtracting
> menu header and description row size from the console row size.
> "start" and "end" are added in the efimenu structure.
> "start" keeps the menu entry index at the top, "end" keeps
> the bottom menu entry index. item_data_print() menu function
> only draws the menu entry between "start" and "end".
>
> Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
> ---
> No update since v1
>
>  cmd/eficonfig.c      | 79 ++++++++++++++++++++++++++++++++++++--------
>  include/efi_config.h |  4 +++
>  include/efi_loader.h |  1 +
>  3 files changed, 70 insertions(+), 14 deletions(-)
>
> diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
> index 13929cb003..e289d95589 100644
> --- a/cmd/eficonfig.c
> +++ b/cmd/eficonfig.c
> @@ -29,8 +29,13 @@ static const char *eficonfig_change_boot_order_desc =
>  	"  Press SPACE to activate or deactivate the entry\n"
>  	"  Select [Save] to complete, ESC/CTRL+C to quit";
>
> +static struct efi_simple_text_output_protocol *cout;
> +static int avail_row;
> +
>  #define EFICONFIG_DESCRIPTION_MAX 32
>  #define EFICONFIG_OPTIONAL_DATA_MAX 64
> +#define EFICONFIG_MENU_HEADER_ROW_NUM 3
> +#define EFICONFIG_MENU_DESC_ROW_NUM 5
>
>  /**
>   * struct eficonfig_filepath_info - structure to be used to store file path
> @@ -156,18 +161,16 @@ void eficonfig_print_entry(void *data)
>  	struct eficonfig_entry *entry = data;
>  	int reverse = (entry->efi_menu->active == entry->num);
>
> -	/* TODO: support scroll or page for many entries */
> +	if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
> +		return;
>
> -	/*
> -	 * Move cursor to line where the entry will be drawn (entry->num)
> -	 * First 3 lines(menu header) + 1 empty line
> -	 */
> -	printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> +	printf(ANSI_CURSOR_POSITION, (entry->num - entry->efi_menu->start) +
> +	       EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
>
>  	if (reverse)
>  		puts(ANSI_COLOR_REVERSE);
>
> -	printf("%s", entry->title);
> +	printf(ANSI_CLEAR_LINE "%s", entry->title);
>
>  	if (reverse)
>  		puts(ANSI_COLOR_RESET);
> @@ -190,8 +193,8 @@ void eficonfig_display_statusline(struct menu *m)
>  	       ANSI_CURSOR_POSITION ANSI_CLEAR_LINE ANSI_CURSOR_POSITION
>  	       "%s"
>  	       ANSI_CLEAR_LINE_TO_END,
> -	       1, 1, entry->efi_menu->menu_header, entry->efi_menu->count + 5, 1,
> -	       entry->efi_menu->count + 6, 1, entry->efi_menu->menu_desc);
> +	       1, 1, entry->efi_menu->menu_header, avail_row + 4, 1,
> +	       avail_row + 5, 1, entry->efi_menu->menu_desc);
>  }
>
>  /**
> @@ -213,13 +216,23 @@ char *eficonfig_choice_entry(void *data)
>
>  		switch (key) {
>  		case KEY_UP:
> -			if (efi_menu->active > 0)
> +			if (efi_menu->active > 0) {
>  				--efi_menu->active;
> +				if (efi_menu->start > efi_menu->active) {
> +					efi_menu->start--;
> +					efi_menu->end--;
> +				}
> +			}
>  			/* no menu key selected, regenerate menu */
>  			return NULL;
>  		case KEY_DOWN:
> -			if (efi_menu->active < efi_menu->count - 1)
> +			if (efi_menu->active < efi_menu->count - 1) {
>  				++efi_menu->active;
> +				if (efi_menu->end < efi_menu->active) {
> +					efi_menu->start++;
> +					efi_menu->end++;
> +				}
> +			}
>  			/* no menu key selected, regenerate menu */
>  			return NULL;
>  		case KEY_SELECT:
> @@ -399,6 +412,8 @@ efi_status_t eficonfig_process_common(struct efimenu *efi_menu,
>
>  	efi_menu->delay = -1;
>  	efi_menu->active = 0;
> +	efi_menu->start = 0;
> +	efi_menu->end = avail_row - 1;
>
>  	if (menu_header) {
>  		efi_menu->menu_header = strdup(menu_header);
> @@ -1865,7 +1880,11 @@ static void eficonfig_print_change_boot_order_entry(void *data)
>  	struct eficonfig_entry *entry = data;
>  	int reverse = (entry->efi_menu->active == entry->num);
>
> -	printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> +	if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
> +		return;
> +
> +	printf(ANSI_CURSOR_POSITION ANSI_CLEAR_LINE,
> +	       (entry->num - entry->efi_menu->start) + EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
>
>  	if (reverse)
>  		puts(ANSI_COLOR_REVERSE);
> @@ -1916,8 +1935,13 @@ char *eficonfig_choice_change_boot_order(void *data)
>  			}
>  			fallthrough;
>  		case KEY_UP:
> -			if (efi_menu->active > 0)
> +			if (efi_menu->active > 0) {
>  				--efi_menu->active;
> +				if (efi_menu->start > efi_menu->active) {
> +					efi_menu->start--;
> +					efi_menu->end--;
> +				}
> +			}
>  			return NULL;
>  		case KEY_MINUS:
>  			if (efi_menu->active < efi_menu->count - 3) {
> @@ -1933,11 +1957,20 @@ char *eficonfig_choice_change_boot_order(void *data)
>  				list_add(&entry->list, &tmp->list);
>
>  				++efi_menu->active;
> +				if (efi_menu->end < efi_menu->active) {
> +					efi_menu->start++;
> +					efi_menu->end++;
> +				}
>  			}
>  			return NULL;
>  		case KEY_DOWN:
> -			if (efi_menu->active < efi_menu->count - 1)
> +			if (efi_menu->active < efi_menu->count - 1) {
>  				++efi_menu->active;
> +				if (efi_menu->end < efi_menu->active) {
> +					efi_menu->start++;
> +					efi_menu->end++;
> +				}
> +			}
>  			return NULL;
>  		case KEY_SELECT:
>  			/* "Save" */
> @@ -2585,6 +2618,7 @@ static efi_status_t eficonfig_init(void)
>  	efi_status_t ret = EFI_SUCCESS;
>  	static bool init;
>  	struct efi_handler *handler;
> +	unsigned long columns, rows;
>
>  	if (!init) {
>  		ret = efi_search_protocol(efi_root, &efi_guid_text_input_protocol, &handler);
> @@ -2595,6 +2629,23 @@ static efi_status_t eficonfig_init(void)
>  					EFI_OPEN_PROTOCOL_GET_PROTOCOL);
>  		if (ret != EFI_SUCCESS)
>  			return ret;
> +		ret = efi_search_protocol(efi_root, &efi_guid_text_output_protocol, &handler);
> +		if (ret != EFI_SUCCESS)
> +			return ret;
> +
> +		ret = efi_protocol_open(handler, (void **)&cout, efi_root, NULL,
> +					EFI_OPEN_PROTOCOL_GET_PROTOCOL);

Shouldn't we be closing the protocol if eficonfig terminates?

> +		if (ret != EFI_SUCCESS)
> +			return ret;
> +
> +		cout->query_mode(cout, cout->mode->mode, &columns, &rows);

[...]

Regards
/Ilias
Masahisa Kojima Jan. 4, 2023, 2:40 a.m. UTC | #2 
On Tue, 27 Dec 2022 at 23:55, Ilias Apalodimas
<ilias.apalodimas@linaro.org> wrote:
>
>
> This looks correct to me.
> Heinrich can you check if that solves your scrolling issues?
>
> On Sat, Dec 24, 2022 at 07:57:44AM +0900, Masahisa Kojima wrote:
> > The current eficonfig menu does not support vertical scroll,
> > so it can not display the menu entries greater than
> > the console row size.
> >
> > This commit add the vertial scroll support.
> > The console size is retrieved by
> > SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode() service, then
> > calculates the row size for menu entry by subtracting
> > menu header and description row size from the console row size.
> > "start" and "end" are added in the efimenu structure.
> > "start" keeps the menu entry index at the top, "end" keeps
> > the bottom menu entry index. item_data_print() menu function
> > only draws the menu entry between "start" and "end".
> >
> > Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
> > ---
> > No update since v1
> >
> >  cmd/eficonfig.c      | 79 ++++++++++++++++++++++++++++++++++++--------
> >  include/efi_config.h |  4 +++
> >  include/efi_loader.h |  1 +
> >  3 files changed, 70 insertions(+), 14 deletions(-)
> >
> > diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
> > index 13929cb003..e289d95589 100644
> > --- a/cmd/eficonfig.c
> > +++ b/cmd/eficonfig.c
> > @@ -29,8 +29,13 @@ static const char *eficonfig_change_boot_order_desc =
> >       "  Press SPACE to activate or deactivate the entry\n"
> >       "  Select [Save] to complete, ESC/CTRL+C to quit";
> >
> > +static struct efi_simple_text_output_protocol *cout;
> > +static int avail_row;
> > +
> >  #define EFICONFIG_DESCRIPTION_MAX 32
> >  #define EFICONFIG_OPTIONAL_DATA_MAX 64
> > +#define EFICONFIG_MENU_HEADER_ROW_NUM 3
> > +#define EFICONFIG_MENU_DESC_ROW_NUM 5
> >
> >  /**
> >   * struct eficonfig_filepath_info - structure to be used to store file path
> > @@ -156,18 +161,16 @@ void eficonfig_print_entry(void *data)
> >       struct eficonfig_entry *entry = data;
> >       int reverse = (entry->efi_menu->active == entry->num);
> >
> > -     /* TODO: support scroll or page for many entries */
> > +     if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
> > +             return;
> >
> > -     /*
> > -      * Move cursor to line where the entry will be drawn (entry->num)
> > -      * First 3 lines(menu header) + 1 empty line
> > -      */
> > -     printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> > +     printf(ANSI_CURSOR_POSITION, (entry->num - entry->efi_menu->start) +
> > +            EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
> >
> >       if (reverse)
> >               puts(ANSI_COLOR_REVERSE);
> >
> > -     printf("%s", entry->title);
> > +     printf(ANSI_CLEAR_LINE "%s", entry->title);
> >
> >       if (reverse)
> >               puts(ANSI_COLOR_RESET);
> > @@ -190,8 +193,8 @@ void eficonfig_display_statusline(struct menu *m)
> >              ANSI_CURSOR_POSITION ANSI_CLEAR_LINE ANSI_CURSOR_POSITION
> >              "%s"
> >              ANSI_CLEAR_LINE_TO_END,
> > -            1, 1, entry->efi_menu->menu_header, entry->efi_menu->count + 5, 1,
> > -            entry->efi_menu->count + 6, 1, entry->efi_menu->menu_desc);
> > +            1, 1, entry->efi_menu->menu_header, avail_row + 4, 1,
> > +            avail_row + 5, 1, entry->efi_menu->menu_desc);
> >  }
> >
> >  /**
> > @@ -213,13 +216,23 @@ char *eficonfig_choice_entry(void *data)
> >
> >               switch (key) {
> >               case KEY_UP:
> > -                     if (efi_menu->active > 0)
> > +                     if (efi_menu->active > 0) {
> >                               --efi_menu->active;
> > +                             if (efi_menu->start > efi_menu->active) {
> > +                                     efi_menu->start--;
> > +                                     efi_menu->end--;
> > +                             }
> > +                     }
> >                       /* no menu key selected, regenerate menu */
> >                       return NULL;
> >               case KEY_DOWN:
> > -                     if (efi_menu->active < efi_menu->count - 1)
> > +                     if (efi_menu->active < efi_menu->count - 1) {
> >                               ++efi_menu->active;
> > +                             if (efi_menu->end < efi_menu->active) {
> > +                                     efi_menu->start++;
> > +                                     efi_menu->end++;
> > +                             }
> > +                     }
> >                       /* no menu key selected, regenerate menu */
> >                       return NULL;
> >               case KEY_SELECT:
> > @@ -399,6 +412,8 @@ efi_status_t eficonfig_process_common(struct efimenu *efi_menu,
> >
> >       efi_menu->delay = -1;
> >       efi_menu->active = 0;
> > +     efi_menu->start = 0;
> > +     efi_menu->end = avail_row - 1;
> >
> >       if (menu_header) {
> >               efi_menu->menu_header = strdup(menu_header);
> > @@ -1865,7 +1880,11 @@ static void eficonfig_print_change_boot_order_entry(void *data)
> >       struct eficonfig_entry *entry = data;
> >       int reverse = (entry->efi_menu->active == entry->num);
> >
> > -     printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
> > +     if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
> > +             return;
> > +
> > +     printf(ANSI_CURSOR_POSITION ANSI_CLEAR_LINE,
> > +            (entry->num - entry->efi_menu->start) + EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
> >
> >       if (reverse)
> >               puts(ANSI_COLOR_REVERSE);
> > @@ -1916,8 +1935,13 @@ char *eficonfig_choice_change_boot_order(void *data)
> >                       }
> >                       fallthrough;
> >               case KEY_UP:
> > -                     if (efi_menu->active > 0)
> > +                     if (efi_menu->active > 0) {
> >                               --efi_menu->active;
> > +                             if (efi_menu->start > efi_menu->active) {
> > +                                     efi_menu->start--;
> > +                                     efi_menu->end--;
> > +                             }
> > +                     }
> >                       return NULL;
> >               case KEY_MINUS:
> >                       if (efi_menu->active < efi_menu->count - 3) {
> > @@ -1933,11 +1957,20 @@ char *eficonfig_choice_change_boot_order(void *data)
> >                               list_add(&entry->list, &tmp->list);
> >
> >                               ++efi_menu->active;
> > +                             if (efi_menu->end < efi_menu->active) {
> > +                                     efi_menu->start++;
> > +                                     efi_menu->end++;
> > +                             }
> >                       }
> >                       return NULL;
> >               case KEY_DOWN:
> > -                     if (efi_menu->active < efi_menu->count - 1)
> > +                     if (efi_menu->active < efi_menu->count - 1) {
> >                               ++efi_menu->active;
> > +                             if (efi_menu->end < efi_menu->active) {
> > +                                     efi_menu->start++;
> > +                                     efi_menu->end++;
> > +                             }
> > +                     }
> >                       return NULL;
> >               case KEY_SELECT:
> >                       /* "Save" */
> > @@ -2585,6 +2618,7 @@ static efi_status_t eficonfig_init(void)
> >       efi_status_t ret = EFI_SUCCESS;
> >       static bool init;
> >       struct efi_handler *handler;
> > +     unsigned long columns, rows;
> >
> >       if (!init) {
> >               ret = efi_search_protocol(efi_root, &efi_guid_text_input_protocol, &handler);
> > @@ -2595,6 +2629,23 @@ static efi_status_t eficonfig_init(void)
> >                                       EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> >               if (ret != EFI_SUCCESS)
> >                       return ret;
> > +             ret = efi_search_protocol(efi_root, &efi_guid_text_output_protocol, &handler);
> > +             if (ret != EFI_SUCCESS)
> > +                     return ret;
> > +
> > +             ret = efi_protocol_open(handler, (void **)&cout, efi_root, NULL,
> > +                                     EFI_OPEN_PROTOCOL_GET_PROTOCOL);
>
> Shouldn't we be closing the protocol if eficonfig terminates?

This protocol is opened with the EFI_OPEN_PROTOCOL_GET_PROTOCOL attribute,
so we don't need to close the protocol.

Thanks,
Masahisa Kojima

>
> > +             if (ret != EFI_SUCCESS)
> > +                     return ret;
> > +
> > +             cout->query_mode(cout, cout->mode->mode, &columns, &rows);
>
> [...]
>
> Regards
> /Ilias
diff mbox series

Patch

diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
index 13929cb003..e289d95589 100644
--- a/cmd/eficonfig.c
+++ b/cmd/eficonfig.c
@@ -29,8 +29,13 @@  static const char *eficonfig_change_boot_order_desc =
 	"  Press SPACE to activate or deactivate the entry\n"
 	"  Select [Save] to complete, ESC/CTRL+C to quit";
 
+static struct efi_simple_text_output_protocol *cout;
+static int avail_row;
+
 #define EFICONFIG_DESCRIPTION_MAX 32
 #define EFICONFIG_OPTIONAL_DATA_MAX 64
+#define EFICONFIG_MENU_HEADER_ROW_NUM 3
+#define EFICONFIG_MENU_DESC_ROW_NUM 5
 
 /**
  * struct eficonfig_filepath_info - structure to be used to store file path
@@ -156,18 +161,16 @@  void eficonfig_print_entry(void *data)
 	struct eficonfig_entry *entry = data;
 	int reverse = (entry->efi_menu->active == entry->num);
 
-	/* TODO: support scroll or page for many entries */
+	if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
+		return;
 
-	/*
-	 * Move cursor to line where the entry will be drawn (entry->num)
-	 * First 3 lines(menu header) + 1 empty line
-	 */
-	printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
+	printf(ANSI_CURSOR_POSITION, (entry->num - entry->efi_menu->start) +
+	       EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
 
 	if (reverse)
 		puts(ANSI_COLOR_REVERSE);
 
-	printf("%s", entry->title);
+	printf(ANSI_CLEAR_LINE "%s", entry->title);
 
 	if (reverse)
 		puts(ANSI_COLOR_RESET);
@@ -190,8 +193,8 @@  void eficonfig_display_statusline(struct menu *m)
 	       ANSI_CURSOR_POSITION ANSI_CLEAR_LINE ANSI_CURSOR_POSITION
 	       "%s"
 	       ANSI_CLEAR_LINE_TO_END,
-	       1, 1, entry->efi_menu->menu_header, entry->efi_menu->count + 5, 1,
-	       entry->efi_menu->count + 6, 1, entry->efi_menu->menu_desc);
+	       1, 1, entry->efi_menu->menu_header, avail_row + 4, 1,
+	       avail_row + 5, 1, entry->efi_menu->menu_desc);
 }
 
 /**
@@ -213,13 +216,23 @@  char *eficonfig_choice_entry(void *data)
 
 		switch (key) {
 		case KEY_UP:
-			if (efi_menu->active > 0)
+			if (efi_menu->active > 0) {
 				--efi_menu->active;
+				if (efi_menu->start > efi_menu->active) {
+					efi_menu->start--;
+					efi_menu->end--;
+				}
+			}
 			/* no menu key selected, regenerate menu */
 			return NULL;
 		case KEY_DOWN:
-			if (efi_menu->active < efi_menu->count - 1)
+			if (efi_menu->active < efi_menu->count - 1) {
 				++efi_menu->active;
+				if (efi_menu->end < efi_menu->active) {
+					efi_menu->start++;
+					efi_menu->end++;
+				}
+			}
 			/* no menu key selected, regenerate menu */
 			return NULL;
 		case KEY_SELECT:
@@ -399,6 +412,8 @@  efi_status_t eficonfig_process_common(struct efimenu *efi_menu,
 
 	efi_menu->delay = -1;
 	efi_menu->active = 0;
+	efi_menu->start = 0;
+	efi_menu->end = avail_row - 1;
 
 	if (menu_header) {
 		efi_menu->menu_header = strdup(menu_header);
@@ -1865,7 +1880,11 @@  static void eficonfig_print_change_boot_order_entry(void *data)
 	struct eficonfig_entry *entry = data;
 	int reverse = (entry->efi_menu->active == entry->num);
 
-	printf(ANSI_CURSOR_POSITION, entry->num + 4, 7);
+	if (entry->efi_menu->start > entry->num || entry->efi_menu->end < entry->num)
+		return;
+
+	printf(ANSI_CURSOR_POSITION ANSI_CLEAR_LINE,
+	       (entry->num - entry->efi_menu->start) + EFICONFIG_MENU_HEADER_ROW_NUM + 1, 7);
 
 	if (reverse)
 		puts(ANSI_COLOR_REVERSE);
@@ -1916,8 +1935,13 @@  char *eficonfig_choice_change_boot_order(void *data)
 			}
 			fallthrough;
 		case KEY_UP:
-			if (efi_menu->active > 0)
+			if (efi_menu->active > 0) {
 				--efi_menu->active;
+				if (efi_menu->start > efi_menu->active) {
+					efi_menu->start--;
+					efi_menu->end--;
+				}
+			}
 			return NULL;
 		case KEY_MINUS:
 			if (efi_menu->active < efi_menu->count - 3) {
@@ -1933,11 +1957,20 @@  char *eficonfig_choice_change_boot_order(void *data)
 				list_add(&entry->list, &tmp->list);
 
 				++efi_menu->active;
+				if (efi_menu->end < efi_menu->active) {
+					efi_menu->start++;
+					efi_menu->end++;
+				}
 			}
 			return NULL;
 		case KEY_DOWN:
-			if (efi_menu->active < efi_menu->count - 1)
+			if (efi_menu->active < efi_menu->count - 1) {
 				++efi_menu->active;
+				if (efi_menu->end < efi_menu->active) {
+					efi_menu->start++;
+					efi_menu->end++;
+				}
+			}
 			return NULL;
 		case KEY_SELECT:
 			/* "Save" */
@@ -2585,6 +2618,7 @@  static efi_status_t eficonfig_init(void)
 	efi_status_t ret = EFI_SUCCESS;
 	static bool init;
 	struct efi_handler *handler;
+	unsigned long columns, rows;
 
 	if (!init) {
 		ret = efi_search_protocol(efi_root, &efi_guid_text_input_protocol, &handler);
@@ -2595,6 +2629,23 @@  static efi_status_t eficonfig_init(void)
 					EFI_OPEN_PROTOCOL_GET_PROTOCOL);
 		if (ret != EFI_SUCCESS)
 			return ret;
+		ret = efi_search_protocol(efi_root, &efi_guid_text_output_protocol, &handler);
+		if (ret != EFI_SUCCESS)
+			return ret;
+
+		ret = efi_protocol_open(handler, (void **)&cout, efi_root, NULL,
+					EFI_OPEN_PROTOCOL_GET_PROTOCOL);
+		if (ret != EFI_SUCCESS)
+			return ret;
+
+		cout->query_mode(cout, cout->mode->mode, &columns, &rows);
+		avail_row = rows - (EFICONFIG_MENU_HEADER_ROW_NUM +
+				    EFICONFIG_MENU_DESC_ROW_NUM);
+		if (avail_row <= 0) {
+			eficonfig_print_msg("Console size is too small!");
+			return EFI_INVALID_PARAMETER;
+		}
+		/* TODO: Should we check the minimum column size? */
 	}
 
 	init = true;
diff --git a/include/efi_config.h b/include/efi_config.h
index cec5715f84..6a104e4b1d 100644
--- a/include/efi_config.h
+++ b/include/efi_config.h
@@ -49,6 +49,8 @@  struct eficonfig_entry {
  * @menu_header:	menu header string
  * @menu_desc:		menu description string
  * @list:		menu entry list structure
+ * @start:		top menu index to draw
+ * @end:		bottom menu index to draw
  */
 struct efimenu {
 	int delay;
@@ -57,6 +59,8 @@  struct efimenu {
 	char *menu_header;
 	const char *menu_desc;
 	struct list_head list;
+	int start;
+	int end;
 };
 
 /**
diff --git a/include/efi_loader.h b/include/efi_loader.h
index 699176872d..91d8a5ef0c 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -328,6 +328,7 @@  extern const efi_guid_t efi_esrt_guid;
 extern const efi_guid_t smbios_guid;
 /*GUID of console */
 extern const efi_guid_t efi_guid_text_input_protocol;
+extern const efi_guid_t efi_guid_text_output_protocol;
 
 extern char __efi_runtime_start[], __efi_runtime_stop[];
 extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];