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author | Emmanuel Vadot <manu@bidouilliste.com> | 2016-11-08 05:03:29 (GMT) |
---|---|---|
committer | Alexander Graf <agraf@suse.de> | 2016-11-14 22:24:02 (GMT) |
commit | 5be8b0a338c56c606d1e615c181b1cc0545b4747 (patch) | |
tree | 00da40c73509c9f2534b2c5edf390e04a718c043 | |
parent | d7608aba38d760be4c40cb8f4591057e5e40c2d4 (diff) | |
download | u-boot-5be8b0a338c56c606d1e615c181b1cc0545b4747.tar.xz |
efi_loader: console: Correctly report modes
Add support for EFI console modes.
Mode 0 is always 80x25 and present by EFI specification.
Mode 1 is always 80x50 and not mandatory.
Mode 2 and above is freely usable.
If the terminal can handle mode 1, we mark it as supported.
If the terminal size is greater than mode 0 and different than mode 1,
we install it as mode 2.
Modes can be switch with cout_set_mode.
Changes in V5:
Correctly detect mode before enabling mode 2.
Changes in V4:
Reset cursor positon on mode switch
Use local variables in console query code
Changes in V3:
Valid mode are 0 to EFIMode-1
Fix style
Changes in V2:
Add mode switch
Report only the modes that we support
Signed-off-by: Emmanuel Vadot <manu@bidouilliste.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r-- | lib/efi_loader/efi_console.c | 100 |
1 files changed, 84 insertions, 16 deletions
diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c index 2e0228c..8ef7326 100644 --- a/lib/efi_loader/efi_console.c +++ b/lib/efi_loader/efi_console.c @@ -9,11 +9,38 @@ #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; +#define EFI_COUT_MODE_2 2 +#define EFI_MAX_COUT_MODE 3 + +struct cout_mode { + unsigned long columns; + unsigned long rows; + int present; +}; + +static struct cout_mode efi_cout_modes[] = { + /* EFI Mode 0 is 80x25 and always present */ + { + .columns = 80, + .rows = 25, + .present = 1, + }, + /* EFI Mode 1 is always 80x50 */ + { + .columns = 80, + .rows = 50, + .present = 0, + }, + /* Value are unknown until we query the console */ + { + .columns = 0, + .rows = 0, + .present = 0, + }, +}; + const efi_guid_t efi_guid_console_control = CONSOLE_CONTROL_GUID; #define cESC '\x1b' @@ -56,8 +83,9 @@ const struct efi_console_control_protocol efi_console_control = { .lock_std_in = efi_cin_lock_std_in, }; +/* Default to mode 0 */ static struct simple_text_output_mode efi_con_mode = { - .max_mode = 0, + .max_mode = 1, .mode = 0, .attribute = 0, .cursor_column = 0, @@ -131,8 +159,10 @@ static efi_status_t EFIAPI efi_cout_output_string( struct efi_simple_text_output_protocol *this, const unsigned short *string) { + struct cout_mode *mode; u16 ch; + mode = &efi_cout_modes[efi_con_mode.mode]; EFI_ENTRY("%p, %p", this, string); for (;(ch = *string); string++) { print_unicode_in_utf8(ch); @@ -140,13 +170,12 @@ static efi_status_t EFIAPI efi_cout_output_string( if (ch == '\n') { efi_con_mode.cursor_column = 1; efi_con_mode.cursor_row++; - } else if (efi_con_mode.cursor_column > console_columns) { + } else if (efi_con_mode.cursor_column > mode->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; - } + if (efi_con_mode.cursor_row > mode->rows) + efi_con_mode.cursor_row = mode->rows; } return EFI_EXIT(EFI_SUCCESS); @@ -160,6 +189,14 @@ static efi_status_t EFIAPI efi_cout_test_string( return EFI_EXIT(EFI_SUCCESS); } +static bool cout_mode_matches(struct cout_mode *mode, int rows, int cols) +{ + if (!mode->present) + return false; + + return (mode->rows == rows) && (mode->columns == cols); +} + static efi_status_t EFIAPI efi_cout_query_mode( struct efi_simple_text_output_protocol *this, unsigned long mode_number, unsigned long *columns, @@ -170,6 +207,8 @@ static efi_status_t EFIAPI efi_cout_query_mode( if (!console_size_queried) { /* Ask the terminal about its size */ int n[3]; + int cols; + int rows; u64 timeout; console_size_queried = true; @@ -191,15 +230,40 @@ static efi_status_t EFIAPI efi_cout_query_mode( goto out; } - console_columns = n[2]; - console_rows = n[1]; + cols = n[2]; + rows = n[1]; + + /* Test if we can have Mode 1 */ + if (cols >= 80 && rows >= 50) { + efi_cout_modes[1].present = 1; + efi_con_mode.max_mode = 2; + } + + /* + * Install our mode as mode 2 if it is different + * than mode 0 or 1 and set it as the currently selected mode + */ + if (!cout_mode_matches(&efi_cout_modes[0], rows, cols) && + !cout_mode_matches(&efi_cout_modes[1], rows, cols)) { + efi_cout_modes[EFI_COUT_MODE_2].columns = cols; + efi_cout_modes[EFI_COUT_MODE_2].rows = rows; + efi_cout_modes[EFI_COUT_MODE_2].present = 1; + efi_con_mode.max_mode = EFI_MAX_COUT_MODE; + efi_con_mode.mode = EFI_COUT_MODE_2; + } } + if (mode_number >= efi_con_mode.max_mode) + return EFI_EXIT(EFI_UNSUPPORTED); + + if (efi_cout_modes[mode_number].present != 1) + return EFI_EXIT(EFI_UNSUPPORTED); + out: if (columns) - *columns = console_columns; + *columns = efi_cout_modes[mode_number].columns; if (rows) - *rows = console_rows; + *rows = efi_cout_modes[mode_number].rows; return EFI_EXIT(EFI_SUCCESS); } @@ -210,11 +274,15 @@ static efi_status_t EFIAPI efi_cout_set_mode( { 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); + if (mode_number > efi_con_mode.max_mode) + return EFI_EXIT(EFI_UNSUPPORTED); + + efi_con_mode.mode = mode_number; + efi_con_mode.cursor_column = 0; + efi_con_mode.cursor_row = 0; + + return EFI_EXIT(EFI_SUCCESS); } static efi_status_t EFIAPI efi_cout_set_attribute( |