OpenWRT firmware for routers
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Chuanhong Guo 49c563a829 ramips: mt7621: add support for memory detection
mt7621 has the following memory map:
0x0-0x1c000000: lower 448m memory
0x1c000000-0x2000000: peripheral registers
0x20000000-0x2400000: higher 64m memory

detect_memory_region in arch/mips/kernel/setup.c only add the first
memory region and isn't suitable for 512m memory detection because
it may accidentally read the memory area for peripheral registers.

This commit adds memory detection capability for mt7621:
1. add the highmem area when 512m is detected.
2. guard memcmp from accessing peripheral registers:
     This only happens when some weird user decided to change
     kernel load address to 256m or higher address. Since this
     is a quite unusual case, we just skip 512m testing and return
     256m as memory size.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
(cherry picked from commit 6d91ddf517)
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
5 years ago
.github build: Update README & github help 6 years ago
config build: add buildinfo files for reproducibility 5 years ago
include build: adjust gcc/g++ version checks for newer apple compilers 5 years ago
package iwinfo: update to latest Git HEAD 5 years ago
scripts build: fix xconfig target 5 years ago
target ramips: mt7621: add support for memory detection 5 years ago
toolchain toolchain: fix gcc depends on kernel headers 5 years ago
tools tools: mkimage: fix __u64 typedef conflict with new glibc 5 years ago
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 12 years ago
.gitignore .gitignore: add .project & .cproject for eclipse users 6 years ago
BSDmakefile add missing copyright header 17 years ago
Config.in merge: base: update base-files and basic config 6 years ago
LICENSE finally move buildroot-ng to trunk 8 years ago
Makefile build: fix host menu config targets using ncurses 5 years ago
README build: README punctuation pendantry 6 years ago
feeds.conf.default OpenWrt v19.07: set branch defaults 5 years ago
rules.mk librpc: remove package 5 years ago

README

  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------

This is the buildsystem for the OpenWrt Linux distribution.

To build your own firmware you need a Linux, BSD or MacOSX system (case
sensitive filesystem required). Cygwin is unsupported because of the lack
of a case sensitive file system.

You need gcc, binutils, bzip2, flex, python, perl, make, find, grep, diff,
unzip, gawk, getopt, subversion, libz-dev and libc headers installed.

1. Run "./scripts/feeds update -a" to obtain all the latest package definitions
defined in feeds.conf / feeds.conf.default

2. Run "./scripts/feeds install -a" to install symlinks for all obtained
packages into package/feeds/

3. Run "make menuconfig" to select your preferred configuration for the
toolchain, target system & firmware packages.

4. Run "make" to build your firmware. This will download all sources, build
the cross-compile toolchain and then cross-compile the Linux kernel & all
chosen applications for your target system.

Sunshine!
	Your OpenWrt Community
	http://www.openwrt.org