net: fec: use correct sizes to clear and flush descriptors

[karo-tx-uboot.git] / doc / README.autoboot

diff --git a/doc/README.autoboot b/doc/README.autoboot
index c971bb141d354f0a66e785876579ae2b7886dc2c..227e3b5dbbe1be7cbdc89d27196e31850e6d9d0b 100644 (file)
--- a/doc/README.autoboot
+++ b/doc/README.autoboot
@@ -2,23 +2,7 @@
  * (C) Copyright 2001
  * Dave Ellis, SIXNET, dge@sixnetio.com
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 Using autoboot configuration options
@@ -90,23 +74,20 @@ What they do
        "bootretry" is >= 0.
 
   CONFIG_AUTOBOOT_KEYED
+  CONFIG_AUTOBOOT_KEYED_CTRLC
   CONFIG_AUTOBOOT_PROMPT
   CONFIG_AUTOBOOT_DELAY_STR
   CONFIG_AUTOBOOT_STOP_STR
-  CONFIG_AUTOBOOT_DELAY_STR2
-  CONFIG_AUTOBOOT_STOP_STR2
 
   "bootdelaykey"  environment variable
-  "bootstopkey"   environment variable
-  "bootdelaykey2" environment variable
-  "bootstopkey2"  environment variable
+  "bootstopkey"          environment variable
 
        These options give more control over stopping autoboot. When
        they are used a specific character or string is required to
        stop or delay autoboot.
 
        Define CONFIG_AUTOBOOT_KEYED (no value required) to enable
-       this group of options.  CONFIG_AUTOBOOT_DELAY_STR,
+       this group of options.  CONFIG_AUTOBOOT_DELAY_STR,
        CONFIG_AUTOBOOT_STOP_STR or both should be specified (or
        specified by the corresponding environment variable),
        otherwise there is no way to stop autoboot.
@@ -114,22 +95,29 @@ What they do
        CONFIG_AUTOBOOT_PROMPT is displayed before the boot delay
        selected by CONFIG_BOOTDELAY starts. If it is not defined
        there is no output indicating that autoboot is in progress.
-       If "%d" is included, it is replaced by the number of seconds
-       remaining before autoboot will start, but it does not count
-       down the seconds. "autoboot in %d seconds\n" is a reasonable
-       prompt.
-
-        If CONFIG_AUTOBOOT_DELAY_STR or "bootdelaykey" is specified
-        and this string is received from console input before
-        autoboot starts booting, U-Boot gives a command prompt. The
-        U-Boot prompt will time out if CONFIG_BOOT_RETRY_TIME is
-        used, otherwise it never times out.
-
-        If CONFIG_AUTOBOOT_STOP_STR or "bootstopkey" is specified and
-        this string is received from console input before autoboot
-        starts booting, U-Boot gives a command prompt. The U-Boot
-        prompt never times out, even if CONFIG_BOOT_RETRY_TIME is
-        used.
+
+       Note that CONFIG_AUTOBOOT_PROMPT is used as the (only)
+       argument to a printf() call, so it may contain '%' format
+       specifications, provided that it also includes, sepearated by
+       commas exactly like in a printf statement, the required
+       arguments. It is the responsibility of the user to select only
+       such arguments that are valid in the given context. A
+       reasonable prompt could be defined as
+
+               #define CONFIG_AUTOBOOT_PROMPT \
+                       "autoboot in %d seconds\n",bootdelay
+
+       If CONFIG_AUTOBOOT_DELAY_STR or "bootdelaykey" is specified
+       and this string is received from console input before
+       autoboot starts booting, U-Boot gives a command prompt. The
+       U-Boot prompt will time out if CONFIG_BOOT_RETRY_TIME is
+       used, otherwise it never times out.
+
+       If CONFIG_AUTOBOOT_STOP_STR or "bootstopkey" is specified and
+       this string is received from console input before autoboot
+       starts booting, U-Boot gives a command prompt. The U-Boot
+       prompt never times out, even if CONFIG_BOOT_RETRY_TIME is
+       used.
 
        The string recognition is not very sophisticated. If a
        partial match is detected, the first non-matching character
@@ -138,11 +126,12 @@ What they do
        character of a key string does not appear in the rest of the
        string.
 
-        Using the CONFIG_AUTOBOOT_DELAY_STR2 #define or the
-        "bootdelaykey2" environment variable and/or the
-        CONFIG_AUTOBOOT_STOP_STR2 #define or the "bootstopkey"
-        environment variable you can specify a second, alternate
-        string (which allows you to have two "password" strings).
+       The CONFIG_AUTOBOOT_KEYED_CTRLC #define allows for the boot
+       sequence to be interrupted by ctrl-c, in addition to the
+       "bootdelaykey" and "bootstopkey". Setting this variable
+       provides an escape sequence from the limited "password"
+       strings.
+
 
   CONFIG_ZERO_BOOTDELAY_CHECK