vxworks programmer's guide.pdf - DAQ Plone Site

VxWorks 5.4
Programmer’s Guide
/*
* Forever, modify data in private memory and display string in
* global memory.
*/
FOREVER
{
for (val = 0; val stuff = val;
pMem->myStuff = val / 2;
/* make sure can access global virtual memory */
printf (string);
taskDelay (sysClkRateGet() * 10);
}
}
return (OK);
}
/************************************************************************
*
* testVmContextGet - return a task’s virtual memory context stored in TCB
*
* Used with vmContextShow() 1 to display a task’s virtual memory context.
* For example, from the shell, type:
* -> tid = sp (testTask)
* -> vmContextShow (testVmContextGet (tid))
*/
VM_CONTEXT_ID testVmContextGet
(
UINT tid
)
{
return ((VM_CONTEXT_ID) ((taskTcb (tid))->spare1));
}
7.5.3 Noncacheable Memory
Architectures that do not support bus snooping must disable the memory caching
that is used for interprocessor communication (or by DMA devices). If multiple
1. This routine is not built in to the Tornado shell. To use it from the Tornado shell, you must
define INCLUDE_MMU_FULL_SHOW in your VxWorks configuration; see the Tornado
User’s Guide: Projects. When invoked this routine’s output is sent to the standard output
device.
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