From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout-de.gmx.net ([213.165.64.23]) by canuck.infradead.org with smtp (Exim 4.72 #1 (Red Hat Linux)) id 1QCWBN-0007Z7-WD for barebox@lists.infradead.org; Wed, 20 Apr 2011 12:06:59 +0000 Message-ID: <4DAECC5D.8060808@gmx.de> Date: Wed, 20 Apr 2011 14:06:53 +0200 From: Thomas Mayer MIME-Version: 1.0 References: <4DAEBBF4.30805@telemotive.de> <39A4B204C321D34DA3490E3B119D5A6C6967ED8015@SBS2008.wellsense.local> In-Reply-To: <39A4B204C321D34DA3490E3B119D5A6C6967ED8015@SBS2008.wellsense.local> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: i.MX35 3-stack use only 128MB RAM To: barebox@lists.infradead.org Hi, wow this was a really quick and good answer, thanks a lot! I will test it and try to adapt it to barebox too. Regards, Thomas Am 20.04.2011 13:20, schrieb Boaz Ben-David: > Hi, > > This is the procedure for modifying Redboot to support 256MB of RAM in Redboot, you can adapt it to barebox: > > How to extend RAM for Linux on MX35PDK > ======================================= > > Tested on: redboot_200910, MX35PDK green board, MX35 TO2, DDR2, SDK1.5 > > The current redboot images enable just half of the physically available DDR2 memory (128MB on MX35PDK). > This is due to the fact that redboot is only enabling SDCS0 (BANK0) and not SDCS1. > It seems that there was a little bug in redboot which has prevented the enablement of SDCS1 and so > nobody has tried this again. Physically the bank1 is working properly on MX35PDK CPU module. > > Step0 > ===== > > Check memory size of existing redboot on your MX35PDK > > under redboot check memory on SDCS1 which is mapped physically to 0x90000000. > You may also use 0x08000000 which is the first virtual address on SDCS1. > Note in redboot, the virtual address 0x80000000 is mapped to physical address 0x80000000 non cashable. > Virtual Address 0x0 is mapped to physical address 0x80000000 cashable. > The virtual address 0x90000000 is not in the MMU table. That is why we receive a "illegal memory address" error message. > This is not a memory exception because no memory transaction has taken place. > See also below... > > > RedBoot> dump -b 0x90000000 > 90000000: ** command abort - illegal memory access? > RedBoot> dump -b 0x08000000 > 08000000: ** command abort - illegal memory access? > RedBoot> dump -b 0x07ffff00 > 07FFFF00: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF |................| > 07FFFF10: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF |................| > > After booting linux use command "free": > > root@freescale ~$ free > total used free shared buffers > Mem: 126140 9920 116220 0 0 > Swap: 0 0 0 > Total: 126140 9920 116220 > > You have about 128MB free memory. But not 256MB. > > > Step 1 > ====== > > We will edit and recompile redboot. For this you may untar the redboot_200910.tgz archive in the linux BSP source > on your linux host. > Unpack redboot and configure the build process as described in > redboot_200910/doc/redboot_mx35.pdf Chapter 6 > > You should be able to run successfully: > > ecosconfig new mx35_3stack redboot > ecosconfig import $ECOS_REPOSITORY/hal/arm/mx35/3stack/current/misc/redboot_ROMRAM.ecm > ecosconfig tree > make > > Step 2 > ====== > > We will know edit some redboot source files as discribed below. Look at the comment > "// by michael for 256MB". > > > ~/redboot_200910/src/ecos/packages/hal/arm/mx35/3stack/current/include/pkgconf/mlt_arm_board_romram.h > > #ifndef __ASSEMBLER__ > #include > #include > > #endif > #define CYGMEM_REGION_ram (0x00000000) > #define CYGMEM_REGION_ram_SIZE (0x0FF00000) // by michael for 256MB > #define CYGMEM_REGION_ram_ATTR (CYGMEM_REGION_ATTR_R | CYGMEM_REGION_ATTR_W) > #define CYGMEM_REGION_rom (0x87F00000) > #define CYGMEM_REGION_rom_SIZE (0x100000) > #define CYGMEM_REGION_rom_ATTR (CYGMEM_REGION_ATTR_R) > #ifndef __ASSEMBLER__ > extern char CYG_LABEL_NAME (__heap1) []; > #endif > #define CYGMEM_SECTION_heap1 (CYG_LABEL_NAME (__heap1)) > #define CYGMEM_SECTION_heap1_SIZE (CYGMEM_REGION_ram_SIZE - (size_t) CYG_LABEL_NAME (__heap1)) > > > ~/redboot_200910/src/ecos/packages/hal/arm/mx35/3stack/current/include/hal_plaform_setup.h line 712: > > ldr r0, ESDCTL_BASE_W > /* deleted by michael > mov r3, #0x2000 > str r3, [r0, #0x0] > ldr r2, ROM_VER_ADDR_W > ldr r4, [r2] > cmp r4, #0x1 > streq r3, [r0, #0x8] > */ > mov r12, #0x00 > mov r2, #0x0 // DDR2 > mov r1, #RAM_BANK0_BASE > bl setup_sdram_bank > cmp r3, #0x0 > 3: bne 3b // loop forever if bank0 is not OK > > /* do not repeat with mDDR settings. We know we have DDR2 (r2=0) > cmp r3, #0x0 > orreq r12, r12, #1 > eorne r2, r2, #0x1 > blne setup_sdram_bank > */ > #if 1 // do the same for bank1 > /* CSD1 */ > mov r12, #0x00 > mov r2, #0x0 // DDR2 > mov r1, #RAM_BANK1_BASE > bl setup_sdram_bank > cmp r3, #0x0 > 4: bne 4b //loop forever if bank1 is not OK > > > /* do not try with mDDR again for bank1. we know we have DDR2 > beq 1b > eorne r2, r2, #0x1 > blne setup_sdram_bank > orr r12, r12, #1 > 1: > */ > #endif > > ~/redboot_200910/src/ecos/packages/hal/arm/mx35/3stack/current/include/fsl_board.h > > /* MX35 3-Stack SDRAM is from 0x90000000, 64M */ > #define SDRAM_BASE_ADDR CSD0_BASE_ADDR > //#define SDRAM_SIZE 0x08000000 > #define SDRAM_SIZE 0x10000000 // by michael for 256MB > #define RAM_BANK0_BASE CSD0_BASE_ADDR > #define RAM_BANK1_BASE CSD1_BASE_ADDR > > > ~/redboot_200910/src/ecos/packages/hal/arm/mx35/3stack/current/src/board_misc.c > > /* Actual Virtual Size Attributes Function */ > /* Base Base MB cached? buffered? access permissions */ > /* xxx00000 xxx00000 */ > X_ARM_MMU_SECTION(0x000, 0xF00, 0x1, ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* ROM */ > X_ARM_MMU_SECTION(0x100, 0x100, 0x1, ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* iRAM */ > X_ARM_MMU_SECTION(0x300, 0x300, 0x1, ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* L2CC */ > X_ARM_MMU_SECTION(0x400, 0x400, 0x400, ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* Internal Regsisters upto SDRAM*/ > X_ARM_MMU_SECTION(0x800, 0x000, 0x80, ARM_CACHEABLE, ARM_BUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* SDRAM 0:128M*/ > X_ARM_MMU_SECTION(0x800, 0x800, 0x80, ARM_CACHEABLE, ARM_BUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* SDRAM 0:128M*/ > X_ARM_MMU_SECTION(0x800, 0x880, 0x80, ARM_UNCACHEABLE, ARM_UNBUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* SDRAM 0:128M*/ > // start by michael for 256MB. Enter new MMU entries for SDCS1 > X_ARM_MMU_SECTION(0x900, 0x080, 0x80, ARM_CACHEABLE, ARM_BUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* SDRAM 1:128M*/ > X_ARM_MMU_SECTION(0x900, 0x900, 0x80, ARM_CACHEABLE, ARM_BUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* SDRAM 1:128M*/ > X_ARM_MMU_SECTION(0x900, 0x980, 0x80, ARM_CACHEABLE, ARM_BUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* SDRAM 1:128M*/ > // end by michael for 256MB > X_ARM_MMU_SECTION(0xA00, 0xA00, 0x40, ARM_CACHEABLE, ARM_BUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* Flash */ > X_ARM_MMU_SECTION(0xB00, 0xB00, 0x20, ARM_CACHEABLE, ARM_BUFFERABLE, ARM_ACCESS_PERM_RW_RW); /* PSRAM */ > X_ARM_MMU_SECTION(0xB20, 0xB20, 0x1E0, ARM_UNCACHEABLE, ARM_UNBUFFERABLE,ARM_ACCESS_PERM_RW_RW); /* ESDCTL, WEIM, M3IF, EMI, NFC, External I/O */ > > > Step 4 > ====== > > rebuild redboot. Now it comes: > > The make scripte does not recognize any changes in hal_platform_setup.h file because this file is been used to build > the lib "vectors". This is not in the dependencies of the make script. It is either not removed by "make clean". > You have to remove the vectors.o by hand. > > So to properly rebuild redboot you need to: > > cd ~/redboot_200910/src/ecos > rm install/lib/vectors.* > make > cp install/bin/redboot.bin ~/shared_folder/redboot_mx35_TO2_256MB.bin # if you have a VMWare and use a shared_folder in ~/shared_folder > > > Step 5 > ====== > > Flash new redboot to MX35PDK using ATK1.6. You do not need to erase the NAND flash. So, you keep the > same fconfig settings. Do not forget the BBT tick! > > > Step 6 > ====== > > Check the new memories: > > RedBoot> dump -b 0x90000000 > 90000000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > 90000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > > > root@freescale ~$ free > total used free shared buffers > Mem: 256088 10040 246048 0 0 > Swap: 0 0 0 > Total: 256088 10040 246048 > > > > > Boaz Ben-David > R&D Engineer > > Tel: +972.2.6470.700Mob: +972.54.678.1511Email: boaz.bd@wellsense-tech.com > www.themapsystem.com > > > Please consider the impact on the environment before printing this e-mail and/or the attachment(s). > ________________________________________ > From: barebox-bounces@lists.infradead.org [barebox-bounces@lists.infradead.org] On Behalf Of Thomas Mayer [thomas.mayer@telemotive.de] > Sent: Wednesday, April 20, 2011 1:56 PM > To: barebox@lists.infradead.org > Subject: i.MX35 3-stack use only 128MB RAM > > Hi, > > I read in the freescale documentation "U-Boot for i.MX35 based Designs" > that the i.MX35 3-stack board has 256MB SDRAM, but we can use only 128MB > because the second chip select isn't configured. Depending on the > circuit diagrams I think "CSD1" isn't configured. > I looked already in the datasheet of the cpu, but I couldn't found a > solution for this problem. > > Have anybody ever tried to enable this second chip select? > > > Regards, > Thomas > > _______________________________________________ > barebox mailing list > barebox@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/barebox > > _______________________________________________ > barebox mailing list > barebox@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/barebox > _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox