From: Stephen Warren <swarren@wwwdotorg.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 08/12] ARM: rpi_b: drop RAM size to 128M
Date: Tue, 03 Jul 2012 20:27:49 -0600 [thread overview]
Message-ID: <4FF3AA25.6010102@wwwdotorg.org> (raw)
In-Reply-To: <930F248225E0FA44A2AE486086E959AEA56E33@SJEXCHMB06.corp.ad.broadcom.com>
On 07/03/2012 08:09 PM, Naren (Narendra) Sankar wrote:
> This should not be hard-coded.
>
> The current board has 256MB but still allows the VC to use different RAM configuration splits. So the u-boot/Linux partition can get more than 128MB.
While that's true, I believe there's currently no runtime API available
to retrieve the memory split information. When such an API is available,
we can remove the hard-coded limit and use the API instead.
Such an API has been requested; see:
https://github.com/raspberrypi/firmware/issues/47
> And it is possible to support up to 1GB of DRAM on this platform.
The hard-coding is in a location specific to the Raspberry-Pi model B.
So, it doesn't impose any restrictions on any other boards using the
same SoC. While the BCM2835 SoC may allow more memory, the RPi B
specifically only supports exactly 256MB.
next prev parent reply other threads:[~2012-07-04 2:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-04 2:02 [U-Boot] [PATCH 00/12] ARM: rpi_b: many minor enhancements Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 01/12] ARM: arm1176: enable instruction cache in arch_cpu_init() Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 02/12] ARM: rpi_b: enable CONFIG_ARCH_CPU_INIT for icache Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 03/12] ARM: rpi_b: define CONFIG_MACH_TYPE Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 04/12] ARM: rpi_b: include config_cmd_default.h Stephen Warren
2012-07-09 12:21 ` Tom Rini
2012-07-04 2:02 ` [U-Boot] [PATCH 05/12] ARM: rpi_b: enable CONFIG_OF_LIBFDT Stephen Warren
2012-07-09 12:24 ` Tom Rini
2012-07-04 2:02 ` [U-Boot] [PATCH 06/12] ARM: rpi_b: set bi_boot_params Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 07/12] ARM: rpi_b: add ATAG support for bootm/bootz Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 08/12] ARM: rpi_b: drop RAM size to 128M Stephen Warren
[not found] ` <930F248225E0FA44A2AE486086E959AEA56E33@SJEXCHMB06.corp.ad.broadcom.com>
2012-07-04 2:27 ` Stephen Warren [this message]
2012-07-04 2:02 ` [U-Boot] [PATCH 09/12] ARM: rpi_b: move stack to top of RAM Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 10/12] ARM: rpi_b: re-order rpi_b.h to keep related defines adjacent Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 11/12] ARM: bcm2835: implement reset using watchdog Stephen Warren
2012-07-04 2:02 ` [U-Boot] [PATCH 12/12] ARM: rpi_b: enabled bootz command Stephen Warren
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