From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?Andr=E9_Schwarz?= Date: Wed, 05 Mar 2008 09:20:13 +0100 Subject: [U-Boot-Users] the question about the Flat Device Tree on MPC8360? In-Reply-To: <47CE07B5.5000308@gmail.com> References: <404550970.22832@tsinghua.org.cn> <47CE064A.9000203@gmail.com> <47CE07B5.5000308@gmail.com> Message-ID: <47CE57BD.5010409@matrix-vision.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Jerry, everybody running an MPC83xx should habe this problem with the latest kernel. "FSL_EMB_PERFMON" will be selected automatically as soon as you chose a mpc83xx platform. It's a "select FSL_EMB_PERFMON" in arch/powerpc/platforms/Kconfig ... mtpmr is not a valid instruction on MPC834x. http://www.freescale.com/files/32bit/doc/ref_manual/MPC8349EARMAD.pdf 7.3.2.2, 7-27Removed last bullet and sub-bullets concerning performance monitor instructions(mfmpr and mtmpr); these instructions are not supported on this device. Maybe Kumar can fix the Kconfig along with pmc.c. regards, Andr? Schwarz Jerry Van Baren schrieb: > Jerry Van Baren wrote: >> ?? wrote: >>> HI, friends. >>> >>> I want to update my linux version from 2.6.11 to 2.6.22 on MPC8360 board, I >>> always fail when the linux version is about 2.6.11. Someone told me that I need to >>> build the Flat Device Tree. I see that the U-boot-1.2.0 has one FDT command, but I >>> did not know how to use this command and how to use the Flat Device Tree. >>> I once see a document from freescale that the FDT file need tftp download to DDR >>> memory first then bootm the linux. What's that FDT file? how can i get it? which >>> DDR address that I need to tftp download? >>> What is the FDT? Could someone teach me? Thanks. >> Hi ??, >> >> u-boot 1.2.0's support of FDT is crude. Upgrade to the tip o' the tree >> (1.3.2rc3), or at least to 1.3.1. >> >> The flattened device tree (FDT) is a method of passing hardware >> configuration information to the kernel. It is described in the kernel >> documentation directory/file: >> ./Documentation/powerpc/booting-without-of.txt >> >> You need a recent kernel, 2.6.22 probably is OK. I'm running 2.6.25rc3 >> (tip 'o the tree as of a week or so ago). >> >> I have a mpc8360emds eval board, so I configure the kernel: >> $ make mpc836x_mds_defconfig >> and build it >> $ make > > I forgot to mention, with the tip 'o the kernel tree and the ELDK 4.1 > (4.2rc), the kernel compile breaks on an unrecognized register due to > CONFIG_FSL_EMB_PERFMON. I have not succeeded in chasing down the cause > yet, so I simply commented it out: > > diff --git a/arch/powerpc/kernel/pmc.c b/arch/powerpc/kernel/pmc.c > index 0516e2d..e26e63a 100644 > --- a/arch/powerpc/kernel/pmc.c > +++ b/arch/powerpc/kernel/pmc.c > @@ -26,7 +26,7 @@ > > static void dummy_perf(struct pt_regs *regs) > { > -#if defined(CONFIG_FSL_EMB_PERFMON) > +#if 0 //gvb// defined(CONFIG_FSL_EMB_PERFMON) > mtpmr(PMRN_PMGC0, mfpmr(PMRN_PMGC0) & ~PMGC0_PMIE); > #elif defined(CONFIG_PPC64) || defined(CONFIG_6xx) > if (cur_cpu_spec->pmc_type == PPC_PMC_IBM) > > Best regards, > gvb > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > U-Boot-Users mailing list > U-Boot-Users at lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/u-boot-users MATRIX VISION GmbH, Talstra?e 16, DE-71570 Oppenweiler - Registergericht: Amtsgericht Stuttgart, HRB 271090 Gesch?ftsf?hrer: Gerhard Thullner, Werner Armingeon, Uwe Furtner