Hi! I am using this model: WR720N http://wiki.openwrt.org/toh/tp-link/tl-wr720n note that, there is a very different model with the same name. (*NOT* this one) http://www.tp-link.com/en/products/details/?model=TL-WR720N but I suggest you to buy this model: wr703n http://wiki.openwrt.org/ru/toh/tp-link/tl-wr703n http://wiki.openwrt.org/toh/tp-link/tl-wr703n it's even smaller. But only have one RJ45 port. The wr720n has two. wr703n is cute. I don't know if these two model available outside of china. But there are some model very similar to these two. and ar9331 based tp-link router: https://github.com/pepe2k/u-boot_mod#supported-devices http://wiki.openwrt.org/toh/tp-link/tl-mr10u in china, we can buy it from WR703N 99CNY http://item.yixun.com/item-216308.html?YTAG=3.21012001 WR720N 125CNY http://item.yixun.com/item-350056.html?YTAG=3.21012000 Or taobao.com, a site like Yahoo or ebay, C2C. 125CNY=21USD,99CNY=17USD, but I don’t know why it is 64.99USD in amazon USA. http://www.amazon.com/TP-Link-TL-WR720N-150Mbps-Wireless-N-Portable/dp/B00EYD1VKC/ref=sr_1_3?ie=UTF8&qid=1386231687&sr=8-3&keywords=wr720N if you can't find it in your location, I can buy you one. - - - The AR9331 datasheet is available there: http://see.sl088.com/w/images/6/69/AR9331.pdf serial console access, hardware and many things are there: http://wiki.openwrt.org/toh/tp-link/tl-wr703n u-boot is here: https://github.com/zhang3/u-boot_mod forked from https://github.com/pepe2k/u-boot_mod thanks to pepe2k(https://github.com/pepe2k) I have create a repository on github, now it's empty. https://github.com/zhang3/barebox-wr720n I will upload my source code and write document later. ... DuHuanpeng -----Original Message----- From: Antony Pavlov [mailto:antonynpavlov@xxxxxxxxx] Sent: 2013年12月5日 12:35 To: Kevin Du Huanpeng Subject: Re: 答复: [PATCH] MIPS: start.S: remove duplicate ADR macro definition On Thu, 5 Dec 2013 01:25:04 +0800 "Kevin Du Huanpeng" <u74147@xxxxxxxxx> wrote: > I am trying to port barebox on my TP-LINK WR720N router > (SoC: AR9331 24KC, DRAM: 32MiB, FLASH: 4MiB) http://market.yandex.ru/model.xml?modelid=8444230 If it's your model then I can easely buy it in Moscow :) > In the start.S, this ADR macro make me confuse... > But finally, I find it > .macro ADR rd label temp > just used to get the label's VMA. (correct me if I am wrong) . > in the start.S, it wants to get the _start 's VMA. > Assuming the _start is the first instruction of barebox. > Why not save the _start's VMA to ra when running the first instruction? > By > bal __start > nop > ... > __start: > I think the different between above and ADR is: > My code overwrite the ra register. > If any other bootloader or something call's barebox, It can't return. > >Personally I have no objections on removing ADR macro. > Just remove it from start.S > > By the way, I really need help... > Do you interested in porting barebox to ar9331? > The router is quite cute and small, and very cheap! > Just 125CNY, (20USD). > You can find quit a lot information about it on OpenWRT. > And there is a working u-boot for this router. > https://github.com/pepe2k/u-boot_mod > I have modify this u-boot and make it run In the kernel's position. > https://github.com/zhang3/u-boot_mod > So that the original u-boot can boot my u-boot. > By done this, > I modify the link address of barebox the same as the u-boot(second > one). > > > > -----邮件原件----- > 发件人: Antony Pavlov [mailto:antonynpavlov@xxxxxxxxx] > 发送时间: 2013年12月5日 0:34 > 收件人: Kevin Du Huanpeng > 主题: Re: [PATCH] MIPS: start.S: remove duplicate ADR macro definition > > On Wed, 4 Dec 2013 20:47:47 +0800 > Kevin Du Huanpeng <u74147@xxxxxxxxx> wrote: > > > hi, mips has a b/bal, why does mips have to use the macro: ADR in > > the start.S > > > > Personally I have no objections on removing ADR macro. It has some disadvantages (e.g. it can't be used twice in one program because it uses global label). > > If you want understand the situation with ADR macro you shoul track the MIPS barebox history. > > My original MIPS barebox has no ADR macro. See head.S file and > especialy 'compute_offset' label in this patch > http://lists.infradead.org/pipermail/barebox/2011-June/003695.html > > But after my publication Shinya Kuribayashi has appeared: > http://lists.infradead.org/pipermail/barebox/2011-June/003707.html > > Kuribayashi-san has his own (but not working) mips barebox implementation and Jean-Christophe enforced me to use Kuribayashi's start.S realisation (with ADR macro): > http://lists.infradead.org/pipermail/barebox/2011-June/003715.html > > As a result now we have start.S with ADR macro. > > You want drop ADR macro from start.S, but IMHO we can drop relocation code from start.S completely! > Today we have smart PBL (pre-boot loader) in barebox. This PBL can comress and relocate main barebox image. So we can easely drop relocation code from start.S: > if you need relocation then just simply use PBL! > > Can you please describe your interest in barebox for MIPS? > That type of board do you use? > > If you need any help on barebox for MIPS you are welcome! > > > _start: bal __start > > nop > > __start: > > addiu a0, ra, -8 > > a0, now is the _start's vma. > > > > > > 2013/12/4 Antony Pavlov <antonynpavlov@xxxxxxxxx>: > > > Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx> > > > --- > > > arch/mips/boot/start.S | 22 +--------------------- > > > 1 file changed, 1 insertion(+), 21 deletions(-) > > > > > > diff --git a/arch/mips/boot/start.S b/arch/mips/boot/start.S index > > > 7e2ae5e..d180157 100644 > > > --- a/arch/mips/boot/start.S > > > +++ b/arch/mips/boot/start.S > > > @@ -2,7 +2,6 @@ > > > * Startup Code for MIPS CPU > > > * > > > * Copyright (C) 2011 Antony Pavlov <antonynpavlov@xxxxxxxxx> > > > - * Used code copyrighted (C) 2009 by Shinya Kuribayashi <skuribay@xxxxxxxxx> > > > * > > > * This file is part of barebox. > > > * See file CREDITS for list of people who contributed to this project. > > > @@ -24,26 +23,7 @@ > > > #include <asm-generic/memory_layout.h> #include > > > <generated/compile.h> #include <generated/utsrelease.h> > > > - > > > - /* > > > - * ADR macro instruction (inspired by ARM) > > > - * > > > - * ARM architecture doesn't have PC-relative jump instruction > > > - * like MIPS' B/BAL insns. When ARM makes PC-relative jumps, > > > - * it uses ADR insn. ADR is used to get a destination address > > > - * of 'label' against current PC. With this, ARM can safely > > > - * make PC-relative jumps. > > > - */ > > > - .macro ADR rd label temp > > > - .set push > > > - .set noreorder > > > - move \temp, ra # preserve ra beforehand > > > - bal _pc > > > - nop > > > -_pc: addiu \rd, ra, \label - _pc # label is assumed to be > > > - move ra, \temp # within pc +/- 32KB > > > - .set pop > > > - .endm > > > +#include <asm/pbl_macros.h> > > > > > > .set noreorder > > > .text > > > -- > > > 1.8.4.4 > > > > > > -- > -- > Best regards, > Antony Pavlov > -- -- Best regards, Antony Pavlov _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
