Date: Mon, 03 Dec 2012 15:08:21 +0100 From: Ralf.Wenk@hs-karlsruhe.de To: freebsd-arm@freebsd.org Subject: Re: FreeBSD on Raspberry Pi 512MB (with U-Boot + ubldr) Message-ID: <E1TfWh4-00BZ82-Is@smtp.hs-karlsruhe.de> In-Reply-To: <50B8058C.9030909@bluezbox.com> References: <3988C1622A974F19A9D3888F0334FF10@ad.peach.ne.jp> <50B8058C.9030909@bluezbox.com>
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Hello, >> BTW, SDHCI is not yet stable? > > There is one issue with setting SDHCI clock. I'll commit fix later today. I like to share some information about the SD card reading speed. While exchanging the old boot sequence with then new one I once booted with the new boot sequence but without an /boot/loader.rc file. The reading speed achieved with dd if=/dev/mmcsd0 of=/dev/null bs=1m count=100 from the SD card was 10 Mbyte/sec. After creating the file with "echo 'fdt addr 0x100' > /boot/loader.rc" and rebooting the reading speed achieved from the SD card was down to 2.8 Mbyte/sec. Although the SDHCI frequency was shown on the second boot as double high as on the first (100MHz versus 50MHz) the reading speed was much lower. I think the cause was the mmcsd bus bit width which was reported as 4 at the first and as 1 at the second boot. Deleting /boot/loader.rc or changing the SDHCI frequency down to 50Hz did not regain the 4 mmcsd bus bit width shown at the first boot. The differences between the boot messages are: $ diff -u rpi-with-newbios rpi-with-newbios-lr --- rpi-with-newbios 2012-12-01 13:40:03.000000000 +0100 +++ rpi-with-newbios-lr 2012-12-01 13:38:14.000000000 +0100 @@ -30,11 +30,10 @@ DRAM: 384MB Device: disk -- +\ /boot/kernel/kernel data=0x35f5f8+0x1fe84 syms=[0x4+0x79640+0x4+0x5cfdf] Hit [Enter] to boot immediately, or any other key for command prompt. Booting [/boot/kernel/kernel]... -fdt_start: 0x00439650 Kernel entry at 0x100100... Kernel args: (null) KDB: debugger backends: ddb @@ -50,8 +49,8 @@ WB enabled LABT branch prediction enabled 16KB/32B 4-way instruction cache 16KB/32B 4-way write-back-locking-C data cache -real memory = 134217728 (128 MB) -avail memory = 125120512 (119 MB) +real memory = 536870912 (512 MB) +avail memory = 386912256 (368 MB) random device not loaded; using insecure entropy simplebus0: <Flattened device tree simple bus> mem 0xf2000000-0xf2ffffff on fdtbus0 intc0: <BCM2835 Interrupt Controller> mem 0xf200b200-0xf200b3ff on simplebus0 @@ -59,7 +58,7 @@ Event timer "BCM2835 Event Timer 3" frequency 1000000 Hz quality 1000 Timecounter "BCM2835 Timecounter" frequency 1000000 Hz quality 1000 sdhci_bcm0: <Broadcom 2708 SDHCI controller> mem 0xf2300000-0xf23000ff irq 70 on simplebus0 -bcm_sdhci_attach(): SDHCI frequency: 50MHz +bcm_sdhci_attach(): SDHCI frequency: 100MHz mmc0: <MMC/SD bus> on sdhci_bcm0 mbox0: <BCM2835 VideoCore Mailbox> mem 0xf200b880-0xf200b8bf irq 1 on simplebus0 mbox0: [GIANT-LOCKED] @@ -77,13 +76,12 @@ usbus0: 480Mbps High Speed USB v2.0 ugen0.1: <DWCOTG> at usbus0 uhub0: <DWCOTG OTG Root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus0 -mmcsd0: 3781MB <SDHC SD04G 8.0 SN 288979219 MFG 09/2011 by 3 SD> at mmc0 25.0MHz/4bit/65535-block +mmcsd0: 3781MB <SDHC SD04G 8.0 SN 288979219 MFG 09/2011 by 3 SD> at mmc0 25.0MHz/1bit/65535-block Root mount waiting for: usbus0 uhub0: 1 port with 1 removable, self powered ugen0.2: <vendor 0x0424> at usbus0 uhub1: <vendor 0x0424 product 0x9512, class 9/0, rev 2.00/2.00, addr 2> on usbus0 uhub1: MTT enabled -Root mount waiting for: usbus0 uhub1: 3 ports with 2 removable, self powered Root mount waiting for: usbus0 ugen0.3: <vendor 0x0424> at usbus0 @@ -95,14 +93,14 @@ @@ -102,7 +100,7 @@ Entropy harvesting: interrupts ethernet point_to_point kickstart. Starting file system checks: /dev/mmcsd0s2a: FILE SYSTEM CLEAN; SKIPPING CHECKS -/dev/mmcsd0s2a: clean, 393149 free (1125 frags, 49003 blocks, 0.2% fragmentation) +/dev/mmcsd0s2a: clean, 393117 free (1125 frags, 48999 blocks, 0.2% fragmentation) Mounting local file systems:. Writing entropy file:. Setting hostname: raspberry-pi. First boot: root@raspberry-pi:~ # dd if=/dev/mmcsd0 of=/dev/null bs=1m count=100 100+0 records in 100+0 records out 104857600 bytes transferred in 9.715465 secs (10792855 bytes/sec) Second boot: root@raspberry-pi:~ # dd if=/dev/mmcsd0 of=/dev/null bs=1m count=100 100+0 records in 100+0 records out 104857600 bytes transferred in 36.061109 secs (2907775 bytes/sec) Kind regards, Ralf
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