Thanks for the suggestion, Jerome.
As you suggested, I tried passing the value with $, like below
asm(" SWI $458752");
But it did not worked.
Then, In some link in internet , I found out that, my arm cross
compiler(arm-linux-gnueabi-gcc) automatically generates thumb
instructions, and somehow this instruction is not supported with that.
So, I just added "-marm" in the compiler option, to not to generate thumb
instructions and it worked out.
Now, I am not getting this error, and it compiled perfectly.
Thanks for your help. Regards,
On Sunday, August 3, 2014 11:26:11 PM UTC+5:30, Jerome wrote:
>
> The SWI op code accepts a 24 bit immedtiate operand, which is assembled as
> its lower 24 bits. The interrupt routine called by SWI extracts it and
> interprets it. Perhaps you need to indicate its an immediate value using
> your assemblers syntax.
> On Aug 2, 2014 5:30 PM, "William Hermans" <[email protected] <javascript:>>
> wrote:
>
>> Except that the value passed in as is will have to be between 0 and
>> 65535( max range for a 16bit type ).
>>
>>
>> On Sat, Aug 2, 2014 at 3:28 PM, William Hermans <[email protected]
>> <javascript:>> wrote:
>>
>>> Manish,
>>>
>>> I have no idea how the underlying code uses this value so I could not
>>> give an 100% accurate answer.
>>>
>>>
>>> On Sat, Aug 2, 2014 at 8:59 AM, manish <[email protected]
>>> <javascript:>> wrote:
>>>
>>>> So, what value I should use to enable privileged mode of
>>>> BeagleBoneBlack?
>>>>
>>>> void CPUSwitchToPrivilegedMode(void)
>>>> {
>>>> asm(" SWI ??????");
>>>> }
>>>>
>>>> On Saturday, August 2, 2014 6:01:30 PM UTC+5:30, William Hermans wrote:
>>>>
>>>>> *Can anyone help me to fix this problem? Is it a gcc compiler issue or
>>>>>> issue with the code.*
>>>>>>
>>>>>
>>>>> Aside from 458752 being about 7 times to big to fit in a 16 bit field ?
>>>>>
>>>>>
>>>>> On Sat, Aug 2, 2014 at 4:00 AM, manish <[email protected]> wrote:
>>>>>
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I am trying to compile the uart code comes
>>>>>> with AM335X_StarterWare_02_00_01_01 for BeagleBoneBlack.
>>>>>> But I get below error :
>>>>>>
>>>>>> /tmp/ccKSsL5N.s:43: Error: invalid swi expression
>>>>>> /tmp/ccKSsL5N.s:43: Error: value of 0000000000070000 too large for
>>>>>> field of 2 bytes at 0000000000000004
>>>>>>
>>>>>>
>>>>>> this error comes for the below code:
>>>>>>
>>>>>> ************************************************************
>>>>>> ******************/
>>>>>> /**
>>>>>> * \brief This API can be used to switch from user mode to
>>>>>> privileged mode
>>>>>> * The priviledge mode will be system mode. System mode
>>>>>> will share
>>>>>> * the same resources as user mode, but with privileges.
>>>>>> *
>>>>>> * \param None.
>>>>>> *
>>>>>> * \return None.
>>>>>> *
>>>>>> * Note : All the access to system configuration which needs
>>>>>> privileged access
>>>>>> * can be done after calling this API.
>>>>>> **/
>>>>>> void CPUSwitchToPrivilegedMode(void)
>>>>>> {
>>>>>> asm(" SWI 458752");
>>>>>> }
>>>>>>
>>>>>> I do not see any issue with this instructions as the last bits should
>>>>>> be set to 1 to operate in privileged mode.
>>>>>> Please refer http://www.riscos.com/support/developers/prm/swis.
>>>>>> html#57602
>>>>>>
>>>>>> Can anyone help me to fix this problem? Is it a gcc compiler issue or
>>>>>> issue with the code.
>>>>>>
>>>>>> Thanks & Regards,
>>>>>> Manish
>>>>>>
>>>>>> --
>>>>>> For more options, visit http://beagleboard.org/discuss
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>>>>>>
>>>>>
>>>>> --
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>>>
>>>
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