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SubjectRe: [PATCH 1/1] davinci: changed SRAM allocator to shared ram.
Date
--------------------------------------------------
From: "Nori, Sekhar" <nsekhar@ti.com>
Sent: Wednesday, February 23, 2011 9:00 PM
To: "Subhasish Ghosh" <subhasish@mistralsolutions.com>;
<davinci-linux-open-source@linux.davincidsp.com>
Cc: <linux-arm-kernel@lists.infradead.org>; "Watkins, Melissa"
<m-watkins@ti.com>; <sachi@mistralsolutions.com>; "Kevin Hilman"
<khilman@deeprootsystems.com>; "Russell King" <linux@arm.linux.org.uk>;
"Michael Williamson" <michael.williamson@criticallink.com>; "Chemparathy,
Cyril" <cyril@ti.com>; "Sergei Shtylyov" <sshtylyov@ru.mvista.com>; "open
list" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH 1/1] davinci: changed SRAM allocator to shared ram.

> Hi Subhasish,
>
> On Fri, Feb 11, 2011 at 19:51:28, Subhasish Ghosh wrote:
>> This patch modifies the sram allocator to allocate memory
>> from the DA8XX shared RAM.
>
> It will be nice to know if you tried suspend-to-RAM
> after this change and found it to be working.
>

SG -- My file system is currently mounted from MMC.
Suspend to RAM seems to have bug with MMC.
(http://processors.wiki.ti.com/index.php/OMAP-L1_Linux_Drivers_Usage#Suspend-to-RAM)
I had tried NFS earlier, but I think there is some problem with
NFS boot and udev with this kernel.
So, currently I will not be able to do it, but will try if I get
a chance.

> Thanks,
> Sekhar
>
>>
>> Signed-off-by: Subhasish Ghosh <subhasish@mistralsolutions.com>
>> ---
>> arch/arm/mach-davinci/da850.c | 6 +++---
>> arch/arm/mach-davinci/include/mach/da8xx.h | 1 +
>> 2 files changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arm/mach-davinci/da850.c
>> b/arch/arm/mach-davinci/da850.c
>> index 3443d97..8a4de97 100644
>> --- a/arch/arm/mach-davinci/da850.c
>> +++ b/arch/arm/mach-davinci/da850.c
>> @@ -711,7 +711,7 @@ static struct map_desc da850_io_desc[] = {
>> },
>> {
>> .virtual = SRAM_VIRT,
>> - .pfn = __phys_to_pfn(DA8XX_ARM_RAM_BASE),
>> + .pfn = __phys_to_pfn(DA8XX_SHARED_RAM_BASE),
>> .length = SZ_8K,
>> .type = MT_DEVICE
>> },
>> @@ -1083,8 +1083,8 @@ static struct davinci_soc_info
>> davinci_soc_info_da850 = {
>> .gpio_irq = IRQ_DA8XX_GPIO0,
>> .serial_dev = &da8xx_serial_device,
>> .emac_pdata = &da8xx_emac_pdata,
>> - .sram_dma = DA8XX_ARM_RAM_BASE,
>> - .sram_len = SZ_8K,
>> + .sram_dma = DA8XX_SHARED_RAM_BASE,
>> + .sram_len = SZ_128K,
>> .reset_device = &da8xx_wdt_device,
>> };
>>
>> diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h
>> b/arch/arm/mach-davinci/include/mach/da8xx.h
>> index cfcb223..c3c3339 100644
>> --- a/arch/arm/mach-davinci/include/mach/da8xx.h
>> +++ b/arch/arm/mach-davinci/include/mach/da8xx.h
>> @@ -70,6 +70,7 @@ extern unsigned int da850_max_speed;
>> #define DA8XX_AEMIF_CTL_BASE 0x68000000
>> #define DA8XX_DDR2_CTL_BASE 0xb0000000
>> #define DA8XX_ARM_RAM_BASE 0xffff0000
>> +#define DA8XX_SHARED_RAM_BASE 0x80000000
>>
>> void __init da830_init(void);
>> void __init da850_init(void);
>> --
>> 1.7.2.3
>>
>>
>


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