From: "Jürgen Kilb" <j.kilb@phytec.de>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] pca-a-l1: added memory device for int. 60kB RAM.
Date: Thu, 19 Jul 2012 20:04:09 +0200 [thread overview]
Message-ID: <50084C19.8070909@phytec.de> (raw)
In-Reply-To: <20120719131024.GX30009@pengutronix.de>
Hi Sascha,
On 19.07.2012 15:10, Sascha Hauer wrote:
> Hi Jürgen,
>
> On Wed, Jul 18, 2012 at 02:58:46PM +0200, Juergen Kilb wrote:
>> Signed-off-by: Juergen Kilb <J.Kilb@phytec.de>
>> ---
>> arch/arm/boards/phycard-a-l1/pca-a-l1.c | 2 ++
>> arch/arm/mach-omap/include/mach/omap3-silicon.h | 1 +
>> 2 files changed, 3 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/boards/phycard-a-l1/pca-a-l1.c b/arch/arm/boards/phycard-a-l1/pca-a-l1.c
>> index 1cc2815..8fae405 100644
>> --- a/arch/arm/boards/phycard-a-l1/pca-a-l1.c
>> +++ b/arch/arm/boards/phycard-a-l1/pca-a-l1.c
>> @@ -292,6 +292,8 @@ static int pcaal1_mem_init(void)
>> */
>> gpmc_generic_init(0x10);
>> #endif
>> + add_mem_device("sram0", OMAP_SRAM_BASE, 60 * SZ_1K,
>> + IORESOURCE_MEM_WRITEABLE);
> Isn't this 64K? Or does the ROM code store stuff in the upper 4k which
> you want to preserve?
Yes it is a 64K memory range but it is splitted into 5 regions and they are
used during the booting process.
0x4020_0000 - 0x4020_EFFF => Used for storing a downloaded booting image
0x4020_F000 - 0x4020_FCAF => Public Stack (reserved for stacks)
0x4020_FCB0 - 0x4020_FFC7 => Tracing Data
0x4020_FFC8 - 0x4020_FFFF => RAM exception Vectors
We can increase the size to 0xFCB0 but I think it's better to use only 60K.
At least the tracing vectors should be preserved.
> Sascha
>
Jürgen
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next prev parent reply other threads:[~2012-07-19 18:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-18 12:58 [PATCH] Added SDR-size auto detection Juergen Kilb
2012-07-18 12:58 ` [PATCH] omap_hsmmc: Hack allert! Add delay in omap_hsmmc Juergen Kilb
2012-07-18 12:58 ` [PATCH] pca-a-l1: added memory device for int. 60kB RAM Juergen Kilb
2012-07-19 13:10 ` Sascha Hauer
2012-07-19 18:04 ` Jürgen Kilb [this message]
2012-07-18 12:58 ` [PATCH] phyCARD-A-L1: Create xload configuration Juergen Kilb
2012-07-20 7:24 ` [PATCH] Added SDR-size auto detection Sascha Hauer
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