Executing C code in HYP mode

Prodigy 40 points

Pierre Lucas

Replies: 3

Views: 3554

Hello everyone.

I'mcurrently  working with CCSv6.1 and the OMAP_5432_UEVM

I'm trying to execute the following C code :

void init_distr(){

	uint32 i = 0;
	uint32 addr = 0x0;

	// get max number of interrupt
	addr = GICD + GICD_TYPER; //0x48211004
	uint32 max_interrupt = *((uint32*)addr);

The idea is very simple: I want to read the value at 0x48211004 in order to initialize the GIC & the VGIC according to the hypervisor XEN configuration.

When the code is executing in HYP mode, the application returns a Prefetch Abort, while in SPV mode it works just fine.
I investigated a little and found that in HYP mode, the variable addr was allocated in 0x3Exxxxxx which according to the documentation of the OMAP, is reserved.

I'm using GNU compiler (Linaro 4.8.4) and cannot really switch to TI for porting purposes.

I am available for any questions, informations.

Best regards,

Pierre

• ccs_v6 A15 Gnu OMAP5432

Prodigy 40 points

Pierre Lucas

• Jun 23, 2015 9:35 AM
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3 Replies

• Prodigy 40 points

  

  Pierre Lucas

  

  • Jun 23, 2015 11:02 AM

  If it may help, this is the flags used by the compiler.
  -marm -mfloat-abi=hard -fexceptions -DCORTEX_A15 -DOMAP_5432 -I"C:/ti/ccsv6/tools/compiler/gcc-arm-none-eabi-4_8-2014q3/arm-none-eabi/include" -g -gdwarf-3 -gstrict-dwarf -Wall
  
  CORTEX_A15 & OMAP_5432 are symbol I use in my headers

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• Prodigy 338355 points

  

  Ki

  

  • Jun 26, 2015 7:11 PM

  In reply to Pierre Lucas:

  Hello Pierre,
  I will move this to the OMAP where the device experts can provide more insight. I will monitor the thread from there in case any tools specific questions come up.
  
  Thanks
  ki

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• Mastermind 29520 points

  

  Yanko Todorov-XID

  

  • Jun 29, 2015 9:08 AM

  Hello Pierre,

  Please take a look on following sources:

  http://lists.denx.de/pipermail/u-boot/2015-January/202920.html

  https://e2e.ti.com/support/omap/f/885/p/333908/1164639

  https://e2e.ti.com/support/omap/f/885/p/292817/1022121

  Best regards,

  Yanko

  

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