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    1: ==================================================================
    2: "Modification of T-Kernel 2.0 Source Code Package Ver 2.01.00"
    3:                                                 September 8, 2011
    4: 
    5: - Modification of T-Kernel Ver 2.01.00 -
    6: 
    7: ----
    8: [K-201-1] The version number has been changed to Ver 2.01.00.
    9: 
   10: MODIFICATION:
   11: ProductVer has been modified from 0x0200 to 0x0201.
   12: The version string has been modified from 2.00.00 to 2.01.00.
   13: 
   14: MODIFIED FILE(S): 
   15: config/launch-ramkernel/src/sysdepend/tef_em1d/SYSCONF
   16: config/src/sysdepend/tef_em1d/SYSCONF
   17: kernel/sysmain/src/sysmain.h
   18: 
   19: ----
   20: 
   21: [K-201-2] Error detection of tk_cre_mpl(), tk_get_mpl()
   22: 
   23: ISSUE(S) IN THE PREVIOUS VERSION:
   24: If 0x7ffffff9 - 0x7fffffff is specified as blksz of tk_get_mpl(), it exits normally without error.
   25: 
   26: This is because blksz for the internal processing becomes 0 (zero) and no error is detected as a result of the processing of rounding up blksz to allocation unit.
   27: 
   28: The same applies to tk_get_mpl_u().
   29: 
   30: pk_cmpl->mplsz of tk_cre_mpl() has the similar issue. If 0x7ffffff9 or above is specified, it exits normally without error. 
   31: 
   32: MODIFICATION:
   33: Error is returned even in the above case now.
   34: 
   35: MODIFIED FILE(S):
   36: kernel/tkernel/src/mempool.c
   37: 
   38: ----
   39: [K-201-3] tk_opn_dev(), tk_cls_dev() : The order relation between open processing and close processing
   40: 
   41: ISSUE(S) IN THE PREVIOUS VERSION:
   42: If open/close processing is requested to the same device from multiple tasks, the temporal order relation between the exit of the open/close function of the device driver and the exit of tk_opn_dev() and tk_cls_dev() may not be as expected.
   43: 
   44: A failure occurs if TDA_OPENREQ attribute is not specified.
   45: 
   46: Examples of Failure:
   47: 
   48: (A) If multiple tasks initiate open processing at a time
   49:     1. task1 calls tk_opn_dev().
   50:     2. openfn of device driver is called. (has not returned yet)
   51:     3. task2 calls tk_opn_dev().
   52:     4. As TDA_OPENREQ is not specified, openfn of device driver is not called.
   53:     5. tk_opn_dev() of task2 is complete.
   54:        openfn of the device driver of 2. is not complete at this point.
   55:   
   56:   Thus, tk_opn_dev() may finish before the processing of openfn of device driver is complete.
   57: 
   58: (B) If a device is opened during close processing
   59:     1. task1 calls tk_cls_dev().
   60:     2. Before calling closefn of device driver, the processing switches to task2.
   61:     3. task2 calls tk_opn_dev().
   62:     4. openfn of device driver is called.
   63:     5. tk_opn_dev() of task2 is complete.
   64:     6. Switches to task1, and closefn of device driver is called.
   65:     7. tk_cls_dev() of task1 is complete.
   66:   
   67:   Thus, even if open processing is complete from user program's viewpoint, closefn may have been called at the end when viewed from the device driver.
   68: 
   69: If TDA_OPENREQ is specified, there is no actual problem as open/close function of device driver is called every time.
   70: 
   71: MODIFICATION: 
   72: To handle the above failure cases, open/close requests from other tasks are put to wait during open/close processing now.
   73: 
   74: MODIFIED FILE(S): 
   75: kernel/sysmgr/src/device.c
   76: kernel/sysmgr/src/deviceio.c
   77: kernel/sysmgr/src/sysmgr.h
   78: 
   79: ----
   80: [K-201-4] tk_srea_dev(), tk_swri_dev() : Abort and wait for multiple requests 
   81: 
   82: ISSUE(S) IN THE PREVIOUS VERSION:
   83: In the following situations in synchronous I/O (tk_srea_dev tk_swri_dev), requests to the device driver may be left incomplete. 
   84: 
   85:  (A) When abort occurs in the middle of synchronous I/O processing, tk_wai_dev() for internal processing of synchronous I/O detects abort, which causes an error (E_ABORT), and the request may not be completed and returned. 
   86: 
   87:  (B) When synchronous I/O is performed while another task is in the wait state for multiple requests by tk_wai_dev(), (because other requests cannot be in the waiting state at the same time during the wait for multiple requests) tk_wai_dev() for internal processing of synchronous I/O results in an error (E_OBJ), and the request may not be completed and returned.    
   88: 
   89: MODIFICATION: 
   90: Processing of tk_srea_dev() and tk_swri_dev() has been modified so that the processing takes place correctly in the above situations. 
   91: 
   92: MODIFIED FILE(S): 
   93: kernel/sysmgr/src/device.c
   94: kernel/sysmgr/src/deviceio.c
   95: kernel/sysmgr/src/sysmgr.h
   96: 
   97: ============================================================================
   98: - Modification of T-Monitor Ver 2.01.00 -
   99: 
  100: ----
  101: [M-201-1] The version number has been changed to Ver 2.01.00.
  102: 
  103: MODIFICATION: 
  104: The version number has been changed form 2.00.00 to 2.01.00. 
  105: 
  106: MODIFIED FILE(S): 
  107: monitor/tmmain/build/tef_em1d/Makefile
  108: 
  109: ----
  110: [M-201-2] Disabling interrupts from the touch panel when the exit command is executed 
  111: 
  112: ISSUE(S) IN THE PREVIOUS VERSION:
  113: The system may reboot when the user touches the touch panel after executing exit. 
  114: 
  115: MODIFICATION: 
  116: Processing at the time of power off has been rearranged. powerOff(), usbPower() and resetStart() have been added so that these functions are invoked when the power is turned off. 
  117: Additionally, the processing to disable interrupts from the touch panel has been added in powerOff(). 
  118: 
  119: MODIFIED FILE(S): 
  120: monitor/hwdepend/tef_em1d/src/config.c
  121: monitor/hwdepend/tef_em1d/src/system.c
  122: 
  123: ----
  124: [M-201-3] Processing of cpuLED()
  125: 
  126: Issue(s) in the previous version:
  127: cpuLED() for controlling GPIO connected to LED5 to LED8 may not behave the way the parameter intends depending on the lighting condition of LED. 
  128: 
  129: cpuLED() is invoked only at the time of startup/exit of T-Monitor. Therefore, it does not cause any trouble in normal T-Monitor use. It may cause a problem in case such program that invokes cpuLED() is written by the user himself/herself. 
  130: 
  131: MODIFICATION: 
  132: Processing of cpuLED() has been modified. 
  133: 
  134: MODIFIED FILE(s): 
  135: monitor/hwdepend/tef_em1d/src/config.c
  136: 
  137: ============================================================================
  138: - Modification in a driver for T-Kernel -
  139: 
  140: [D-201-1] The SPI polarity to be set by the clock driver
  141: 
  142: ISSUE(S) IN THE PREVIOUS VERSION:
  143: The polarity of the CS line for Audio CODEC (SPI0:CS1) and the temperature sensor (SPI2:CS0) is not set correctly and access is not possible. 
  144: 
  145: MODIFICATION: 
  146: Modification has been made so that the polarity is set to the correct value. 
  147: 
  148: MODIFIED FILE(s): 
  149: drv/tef_em1d/clk/src/em1d512_spi.c
  150: 
  151: [EOF]
  152: ============================================================================