Yasha Cherikovsky (yasha.che3@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/12440
-gerrit
commit 6d55fd59fe680f795380982ccea32d0d7f465ec0 Author: Yasha Cherikovsky yasha.cherikovsky@gmail.com Date: Sat Nov 14 18:52:35 2015 +0200
coreinfo: Rewrite bootlog_module
The old bootlog_module implementation was completely broken: - It assumed that the console buffer is located at address 0x90000, and of size 64K. It is not correct nowadays. - It displayed the buffer in a very hacky way, the code was riddled with TODOs and FIXMEs. Scrolling had sometimes unexpected behavior.
The new implementation: - Uses the cbmem console as the source of data. It takes the console information from lib_sysinfo of libpayload, which is constructed from the coreboot tables (no more hardcoded adressess). - Properly sanitizes the console buffer for display, which makes scolling and display much easier to implement.
Change-Id: I3f87ec920631da2acfd3f52273228703f22f469f Signed-off-by: Yasha Cherikovsky yasha.che3@gmail.com --- payloads/coreinfo/bootlog_module.c | 209 +++++++++++++++++++++++++------------ 1 file changed, 142 insertions(+), 67 deletions(-)
diff --git a/payloads/coreinfo/bootlog_module.c b/payloads/coreinfo/bootlog_module.c index 27653d3..9e72e70 100644 --- a/payloads/coreinfo/bootlog_module.c +++ b/payloads/coreinfo/bootlog_module.c @@ -17,33 +17,130 @@
#if IS_ENABLED(CONFIG_MODULE_BOOTLOG)
-#define CONFIG_COREBOOT_PRINTK_BUFFER_ADDR 0x90000 -#define CONFIG_COREBOOT_PRINTK_BUFFER_SIZE 65536 +#define LINES_SHOWN 19 +#define TAB_WIDTH 2
-static char *buf; -static s32 cursor = 0; -static s32 cursor_max;
-static int bootlog_module_init(void) -{ - int i; - volatile unsigned long *ptr = - (void *)(CONFIG_COREBOOT_PRINTK_BUFFER_ADDR + 16); /* FIXME */ +/* Globals that are used for tracking screen state */ +static char *g_buf = NULL; +static s32 g_line = 0; +static s32 g_lines_count = 0; +static s32 g_max_cursor_line = 0; + + +/* Copied from libpayload/drivers/cbmem_console.c */ +struct cbmem_console { + uint32_t size; + uint32_t cursor; + uint8_t body[0]; +} __attribute__ ((__packed__)); + + +static u32 char_width(char c, u32 cursor, u32 screen_width) { + if (c == '\n') { + return screen_width - (cursor % screen_width); + } else if (c == '\t') { + return TAB_WIDTH; + } else if (isprint(c)) { + return 1; + } + + return 0; +} + +static u32 calculate_chars_count(char *str, u32 str_len, u32 screen_width, u32 screen_height) { + u32 i, count = 0; + + for (i = 0; i < str_len; i++) { + count += char_width(str[i], count, screen_width); + } + + /* Ensure that 'count' can occupy at least the whole screen */ + if (count < screen_width * screen_height) { + count = screen_width * screen_height; + } + + /* Pad to line end */ + if (count % screen_width != 0) { + count += screen_width - (count % screen_width); + } + + return count; +} + +/* + * This method takes an input buffer and sanitizes it for display, which means: + * - '\n' is converted to spaces until end of line + * - Tabs are converted to spaces of size TAB_WIDTH + * - Only printable characters are preserved + */ +static int sanitize_buffer_for_display(char *str, u32 str_len, char *out, u32 out_len, u32 screen_width) { + u32 cursor = 0; + u32 i; + + for (i = 0; i < str_len && cursor < out_len; i++) { + u32 width = char_width(str[i], cursor, screen_width); + if (width == 1) { + out[cursor++] = str[i]; + } else if (width > 1) { + while (width-- && cursor < out_len) { + out[cursor++] = ' '; + } + } + }
- buf = malloc(CONFIG_COREBOOT_PRINTK_BUFFER_SIZE); - if (!buf) { - /* TODO */ + /* Fill the rest of the out buffer with spaces */ + while (cursor < out_len) { + out[cursor++] = ' '; }
- memcpy(buf, (char *)ptr, CONFIG_COREBOOT_PRINTK_BUFFER_SIZE); + return 0; +} + +static int bootlog_module_init(void) { + /* Make sure that lib_sysinfo is initialized */ + int ret = lib_get_sysinfo(); + if (ret) { + return -1; + } + + struct cbmem_console *console = lib_sysinfo.cbmem_cons; + if (console == NULL) { + return -1; + } + /* Extract console information */ + char *buffer = (char *)(&(console->body)); + u32 buffer_size = console->size; + u32 cursor = console->cursor; + + /* The cursor may be bigger than buffer size when the buffer is full */ + if (cursor >= buffer_size) { + cursor = buffer_size - 1; + } + + /* Calculate how much characters will be displayed on screen */ + u32 chars_count = calculate_chars_count(buffer, cursor + 1, SCREEN_X, LINES_SHOWN); + + /* Sanity check, chars_count must be padded to full line */ + if (chars_count % SCREEN_X != 0) { + return -2; + } + + g_lines_count = chars_count / SCREEN_X; + g_max_cursor_line = MAX(g_lines_count - 1 - LINES_SHOWN, 0);
- cursor_max = CONFIG_COREBOOT_PRINTK_BUFFER_SIZE; - for (i = 0; i < 20; i++) { - do { - cursor_max--; - } while (*(buf + cursor_max) != '\n'); + g_buf = malloc(chars_count); + if (!g_buf) { + return -3; + } + + if (sanitize_buffer_for_display(buffer, cursor + 1, + g_buf, chars_count, + SCREEN_X) < 0) { + free(g_buf); + g_buf = NULL; + return -4; } - cursor_max++; /* Stay _behind_ the newline. */
/* TODO: Maybe a _cleanup hook where we call free()? */
@@ -52,74 +149,52 @@ static int bootlog_module_init(void)
static int bootlog_module_redraw(WINDOW *win) { - int x = 0, y = 0; - char *tmp = buf + cursor; - print_module_title(win, "Coreboot Bootlog");
- /* FIXME: Handle lines longer than 80 characters. */ - while (y <= 18) { - mvwaddch(win, y + 2, x, isprint(*tmp) ? *tmp : ' '); - x++; - tmp++; - if (*tmp == '\n') { - y++; - x = 0; - tmp++; /* Skip the newline. */ + if (!g_buf) { + return -1; + } + + int x = 0, y = 0; + char *tmp = g_buf + g_line * SCREEN_X; + + for (y = 0; y < LINES_SHOWN; y++) { + for (x = 0; x < SCREEN_X; x++) { + mvwaddch(win, y + 2, x, *tmp); + tmp++; } + }
return 0; }
-/* TODO: Simplify code. */ static int bootlog_module_handle(int key) { - int i; + if (!g_buf) { + return 0; + }
switch (key) { case KEY_DOWN: - if (cursor == cursor_max) - return 0; - while (*(buf + cursor) != '\n') - cursor++; - cursor++; /* Skip the newline. */ + g_line++; break; case KEY_UP: - if (cursor == 0) - return 0; - cursor--; /* Skip the newline. */ - do { - cursor--; - } while (*(buf + cursor) != '\n'); - cursor++; /* Stay _behind_ the newline. */ + g_line--; break; - case KEY_NPAGE: - if (cursor == cursor_max) - return 0; - for (i = 0; i < 20; i++) { - while (*(buf + cursor) != '\n') - cursor++; - cursor++; /* Skip the newline. */ - } + case KEY_NPAGE: /* Page up */ + g_line -= LINES_SHOWN; break; - case KEY_PPAGE: - if (cursor == 0) - return 0; - for (i = 0; i < 20; i++) { - do { - cursor--; - } while (*(buf + cursor) != '\n'); - } - cursor++; /* Stay _behind_ the newline. */ + case KEY_PPAGE: /* Page down */ + g_line += LINES_SHOWN; break; }
- if (cursor > cursor_max) - cursor = cursor_max; + if (g_line < 0) + g_line = 0;
- if (cursor < 0) - cursor = 0; + if (g_line > g_max_cursor_line) + g_line = g_max_cursor_line;
return 1; }