Xtensa port version 2.0.

Major reorg of Xtensa port sources. See readme and relnotes files for details.

demos/cadence/sim/README.TXT

@@ -1,8 +1,4 @@
 
-Release Notes for FreeRTOS Xtensa port
---------------------------------------
-
-
 How to build and run the tests
 ------------------------------
 
@@ -55,109 +51,5 @@ If you build from Xplorer, remember to enable -mlongcalls in the Assembler
 options for certain targets (e.g. when you get the linker warning: dangerous
 relocation).
 
-
-Notes for version 1.7
----------------------
-
-- portSTACK_TYPE changed to uint32_t from uint8_t. Stack size definitions
-  adjusted accordingly.
-
-- portYIELD_FROM_ISR changed to call _frxt_setup_switch conditionally.
-
-- Tick handler calls xTaskIncrementTick inside critical region to prevent
-  interrupt nesting issues.
-
-
-Notes for version 1.6
----------------------
-
-- This version supports FreeRTOS version 10.0.0.
-
-- The directory structure and makefiles have been reorganized to conform
-  to the structure of FreeRTOS version 10.0.0.
-
-
-Notes for version 1.5
----------------------
-
-- This version supports FreeRTOS version 9.0.0.
-
-- This version supports thread safe operation with the Xtensa C Library
-  (xclib) in addition to the Newlib C library (newlib).
-  The xtensa_config.h file is set up to enable thread safe operation by
-  default if xclib or newlib is detected. Use -D XT_USE_THREAD_SAFE_CLIB=0
-  on the command line or in the project definition to disable this.
-
-- Incorrect function prototypes for xt_ints_on/xt_ints_off have been fixed.
-
-
-Notes for version 1.4.2
------------------------
-
-- This version implements a bugfix. The bug was that even when the
-  config parameter "configUSE_TIME_SLICING" was set to zero, time
-  slicing would still occur due to a problem in the Xtensa interrupt
-  processing code.
-
-- The "small_test" test has been added to illustrate how FreeRTOS 
-  can be configured to reduce the memory footprint.
-
-
-Notes for version 1.4
----------------------
-
-- This version supports FreeRTOS version 8.2.0.
-
-- This version adds a new test xt_intr.c for interrupts testing.
-
-- This version separates the trace and benchmark facilities into a
-  separate downloadable.
-
-
-Notes for version 1.3
----------------------
-
-- This version implements a separate interrupt stack. The interrupt
-  dispatch code saves the current task's state on to the task's own
-  stack and then switches to the interrupt stack for the interrupt
-  processing. Nested interrupts will continue to use the interrupt
-  stack. This helps to reduce the sizes of task stacks, since task
-  stacks no longer have to account for space to accommodate possible
-  nested interrupts. The size of the interrupt stack is controlled
-  by a config parameter.
-
-
-Notes for version 1.2
----------------------
-
-- This version supports FreeRTOS version 8.1.2.
-
-- This version supports both CALL0 and windowed Xtensa configurations.
-
-- This version supports thread safe operation for the Newlib C library.
-
-- This version introduces an API for installing low/medium priority
-  interrupt handlers and exception handlers, which can be written in C.
-  See xtensa_api.h for details.
-
-- This version supports software prioritization of interrupts at the
-  same level. Define XT_USE_SWPRI to use this feature. Higher-numbered
-  interrupts are handled at a higher priority than lower-numbered ones.
-
-- The FreeRTOS demo application requires a stack size of at least 4 KB.
-  The standalone tests should be able to run with smaller stack sizes.
-  The minimum stack size depends on the specific Xtensa configuration.
-  Adjust the stack size of your application as required.
-
-- The examples are all defined with a heap size of 256 KB. This could
-  be a problem with Xtensa configurations that have only small amounts
-  of memory. Adjust the heap size to suit your platform and application.
-  There is an example of a small-footprint configuration in the directory
-  Xtensa_XCC_small.
-
-- NOTE: Code overlay support is not yet enabled for this port, even though
-  the support code is present. This feature is not enabled nor tested.
-  Do not define XT_USE_OVLY when building.
-
 -End-