文件列表:

threadx_mips\build\default.con (6475, 2008-01-07)
threadx_mips\build\libosf.gpj (2302, 2008-01-07)
threadx_mips\build\vssver.scc (64, 2008-01-07)
threadx_mips\inc\osf.h (30006, 2008-01-07)
threadx_mips\inc\tx_api.h (46067, 2008-01-07)
threadx_mips\inc\tx_blo.h (8923, 2008-01-07)
threadx_mips\inc\tx_byt.h (9193, 2008-01-07)
threadx_mips\inc\tx_el.h (45207, 2008-01-07)
threadx_mips\inc\tx_eve.h (9078, 2008-01-07)
threadx_mips\inc\tx_ghs.h (1549, 2008-01-07)
threadx_mips\inc\tx_ini.h (6870, 2008-01-07)
threadx_mips\inc\tx_mut.h (7758, 2008-01-07)
threadx_mips\inc\tx_port.h (10162, 2008-01-07)
threadx_mips\inc\tx_que.h (9384, 2008-01-07)
threadx_mips\inc\tx_sem.h (8689, 2008-01-07)
threadx_mips\inc\tx_thr.h (14212, 2008-01-07)
threadx_mips\inc\tx_tim.h (10218, 2008-01-07)
threadx_mips\inc\vssver.scc (256, 2008-01-07)
threadx_mips\lib\tx.a (371818, 2008-01-07)
threadx_mips\lib\tx.dba (1255518, 2008-01-07)
threadx_mips\lib\txe.a (382876, 2008-01-07)
threadx_mips\lib\txe.dba (264812, 2008-01-07)
threadx_mips\lib\vssver.scc (96, 2008-01-07)
threadx_mips\src\threadx\build_ap.bat (305, 2008-01-07)
threadx_mips\src\threadx\build_tx.bat (13850, 2008-01-07)
threadx_mips\src\threadx\build_txe.bat (19195, 2008-01-07)
threadx_mips\src\threadx\demo.bld (279, 2008-01-07)
threadx_mips\src\threadx\demo.c (11279, 2008-01-07)
threadx_mips\src\threadx\demo.con (383, 2008-01-07)
threadx_mips\src\threadx\demo.dbo (16246, 2008-01-07)
threadx_mips\src\threadx\demo.inf (131, 2008-01-07)
threadx_mips\src\threadx\demo.ld (496, 2008-01-07)
threadx_mips\src\threadx\demo.o (6999, 2008-01-07)
threadx_mips\src\threadx\demo_el (71612, 2008-01-07)
threadx_mips\src\threadx\demo_el.bld (318, 2008-01-07)
threadx_mips\src\threadx\demo_el.dla (97856, 2008-01-07)
threadx_mips\src\threadx\demo_el.dnm (51501, 2008-01-07)
threadx_mips\src\threadx\demo_el.ld (536, 2008-01-07)
threadx_mips\src\threadx\demo_el.map (19619, 2008-01-07)
... ...

Express Logic's ThreadX for MIPS MIPS32_4Kx Using the Green Hills Tools 1. Installation ThreadX for the MIPS MIPS32_4Kx is delivered on a single CD-ROM compatible disk. The entire distribution can be found in the sub-directory: \THREADX To install ThreadX to your hard-disk, make a THREADX directory on your hard-disk (we recommend C:\THREADX\MIPS32_4Kx\GREEN) and copy all the contents of the THREADX sub-directory on the distribution disk. The following is an example MS-DOS copy command from the distribution directory (assuming source is D: and C: is your hard-drive): D:\THREADX> xcopy /S *.* C:\THREADX\MIPS32_4Kx\GREEN 2. Building the ThreadX run-time Library Building the ThreadX library is easy, simply load the MULTI project file TX.BLD, which is located inside your ThreadX directory: C:\THREADX\MIPS32_4Kx\GREEN\TX.BLD Once the ThreadX library files are displayed in the MULTI project window, select the "Project Build" operation and observe the compilation and assembly of the ThreadX library. This project build produces the ThreadX library file TX.A. 3. Demonstration System The ThreadX demonstration is designed to execute under the MULTI environment using the MULTI MIPS instruction set simulator. The instructions that follow will show you how to get the ThreadX demonstration running in this environment. Building the demonstration is easy, simply load the MULTI project file DEMO.BLD, which is located inside your ThreadX directory: C:\THREADX\MIPS32_4Kx\GREEN\DEMO.BLD You should observe the following files in the project view area: DEMO.BLD RESET.MIP TX_ILL.MIP DEMO.C DEMO.LD README.TXT DEMO.CON At this point, select the "Project Build" operation and observe the compilation, assembly, and linkage of the ThreadX application. After the demonstration is built, invoke the MIPS simulator by selecting the CONNECT button. Now select the DEBUG button. You should now observe the main function of DEMO.C. Once the debug server is connected, select the MULTI "Debug" option. You should now observe the main function in DEMO.C. You are now ready to execute the ThreadX demonstration system. The MULTI MIPS32_4Kx simulator also simulates interrupts. To setup a simulated timer interrupt for ThreadX, please enter the following command at the "Target" window prompt: timer 9999 7 This command will cause a simulated interrupt 5 every 9999 cycles. ThreadX is setup to use this interrupt as its periodic timer interrupt source. 3.1 EventAnalyzer Demonstration To build a demonstration system that will also log events for the MULTI EventAnalyzer, perform the same steps as the regular demo, except build the ThreadX library with the TXE.BAT build file and use the DEMO_EL.BLD build file to build the demonstration that logs all system events. 4. System Initialization The system entry point using Green Hills tools is at the label _start. This is defined within the CRT0.MIP file supplied by Green Hills. In addition, this is where all static and global pre-set C variable initialization processing is called from. After the Green Hills startup function returns, ThreadX initialization is is called. The main initialization function is _tx_initialize_low_level and is located in the file TX_ILL.MIP. This function is responsible for setting up various system data structures, and interrupt vectors. In addition, _tx_initialize_low_level also determines the first available address for use by the application. By default, the first available address is assumed to start at the beginning of the ThreadX section .free_mem. If changes are made to the DEMO.LD file, the .free_mem section should remain the last allocated section in the main RAM area. The starting address of this section is passed to the application definition function, tx_application_define. 5. Assembler / Compiler Switches The following are compiler switches used in building the demonstration system: Compiler Switch Meaning -G Specifies debug information -c Specifies object code generation -cpu=mips32_4kc Specifies MIPS32_4Kx code generation -noasmwarn Disable in-line assembly warnings 5.1 User defines The following defines and their associated action are as follows: Define Meaning TX_DISABLE_ERROR_CHECKING If defined before tx_api.h is included, this define causes basic ThreadX error checking to be disabled. Please see Chapter 4 in the "ThreadX User Guide" for more details. TX_DISABLE_STACK_CHECKING By default, the thread create function fills the thread's stack with a 0xEF data pattern, which is used by the MULTI debugger to calculate stack usage. This can be bypassed by compiling tx_tc.c with this define. TX_ENABLE_EVENT_LOGGING This define enables event logging for any or all of the ThreadX source code. If this option is used anywhere, the tx_ihl.c file must be compiled with it as well, since this is where the event log is initialized. TX_NO_EVENT_INFO This is a sub-option for event logging. If this is enabled, only basic information is saved in the log. TX_ENABLE_EVENT_FILTERS This is also a sub-option for event-logging. If this is enabled, run-time filtering logic is added to the event logging code. 6. Register Usage and Stack Frames The Green Hills MIPS compiler assumes that registers t0-t9 ($8-$15, $24, $25) and f0-f19 are scratch registers for each function. All other registers used by a C function must be preserved by the function. ThreadX takes advantage of this in situations where a context switch happens as a result of making a ThreadX service call (which is itself a C function). In such cases, the saved context of a thread is only the non-scratch registers. The following defines the saved context stack frames for context switches that occur as a result of interrupt handling or from thread-level API calls. All suspended threads have one of these two types of stack frames. The top of the suspended thread's stack is pointed to by tx_stack_ptr in the associated thread control block TX_THREAD. Offset Interrupted Stack Frame Non-Interrupt Stack Frame 0x00 1 0 0x04 s8 ($30) s8 ($30) 0x08 s7 ($23) s7 ($23) 0x0C s6 ($22) s6 ($22) 0x10 s5 ($21) s5 ($21) 0x14 s4 ($20) s4 ($20) 0x18 s3 ($19) s3 ($19) 0x1C s2 ($18) s2 ($18) 0x20 s1 ($17) s1 ($17) 0x24 s0 ($16) s0 ($16) 0x28 hi hi 0x2C lo lo 0x30 t9 ($25) ra ($31) 0x34 t8 ($24) SR 0x38 t7 ($15) 0x3C t6 ($14) 0x40 t5 ($13) 0x44 t4 ($12) 0x48 t3 ($11) 0x4C t2 ($10) 0x50 t1 ($9) 0x54 t0 ($8) 0x58 a3 ($7) 0x5C a2 ($6) 0x60 a1 ($5) 0x*** a0 ($4) 0x68 v1 ($3) 0x6C v0 ($2) 0x70 at ($1) 0x74 ra ($31) 0x78 SR 0x7C EPC 7. Improving Performance The distribution version of ThreadX is built without any compiler optimizations. This makes it easy to debug because you can trace or set breakpoints inside of ThreadX itself. Of course, this costs some performance. To make ThreadX run faster, you can change the TX.BLD project to disable debug information and enable the desired optimizations. In addition, you can eliminate the ThreadX basic API error checking by compiling your application code with the symbol TX_DISABLE_ERROR_CHECKING defined before TX_API.H is included. 8. Interrupt Handling ThreadX provides complete and high-performance interrupt handling for MIPS32_4Kx targets. The general exception handler is at address: 0x80000180 (0xBFC00380 non- cached). The ThreadX general exception handler is defined in the file tx_ill.MIP at the label _tx_exception_handler. A small piece of code to jump to this exception handler is copied to the general exception handler address during initialization. 8.1 Application ISRs Multiple exceptions may be processed with a single execution of the exception handler. This is because the Cause register could indicate more than a single exception. Processing for each exception is also located in the general exception handler that starts at the label: _tx_exception_handler. Application ISRs can be added into this handler. 9. Revision History 01/01/2003 ThreadX update of MIPS32_4Kx/Green Hills port and new ThreadX Version 4.0b Generic Code. The following files were changed/added for version G4.0b.4.0b: TX_PORT.H Modified comments, changed VOID typedefs, and changed version ID. TX_BLO.H Modified the in-line initialization code. TX_BYT.H Modified the in-line initialization code. TX_EVE.H Modified the in-line initialization code. TX_MUT.H Modified the in-line initialization code. TX_QUE.H Modified the in-line initialization code. TX_SEM.H Modified the in-line initialization code. TX_THR.H Added volatile modifier for several system variables and added function prototype. TX_BPI.C Modified in-line initialization logic. TX_BYTI.C Modified in-line initialization logic. TX_EFI.C Modified in-line initialization logic. TX_IHL.C Changed and moved in-line initialization code. TX_MI.C Modified in-line initialization logic. TX_QF.C Fixed problem relating to not decrementing the _tx_thread_preempt_disable flag under interrupt protection. TX_QI.C Modified in-line initialization logic. TX_SI.C Modified in-line initialization logic. TX_TWA.C Fixed problem relating to not decrementing the _tx_thread_preempt_disable flag. TX_ILL.MIP Added logic for count/compare timer interrupt setup and handling. TX*.MIP Changed comments and copyright header. TX*.C Changed comments and copyright header. TX*.H Changed comments and copyright header. 07/15/2002 ThreadX update of MIPS32_4Kx/Green Hills port and new ThreadX Version 4.0a Generic Code. The following files were changed/added for version G4.0a.4.0a: TX_API.H Added logic to select API runtime errors, declared tx_application_define as extern "C", and changed constant TX_FOREVER to TX_LOOP_FOREVER. TX_PORT.H Added in-line initialization define, added system timer stack and priority constants, modified interrupt restore macro, and changed version ID. TX_TIM.H Added logic for setup of the system timer thread's stack area. TX_BA.C Changed to use ULONG_PTR type. TX_BPCLE.C Optimized out extra disable interrupts call. TX_BPI.C Added logic to detect in-line initialization and avoid duplicate data declarations. TX_BYTA.C Changed to use ULONG_PTR and UCHAR_PTR types. TX_BYTC.C Changed to use ULONG_PTR type. TX_BYTCL.C Corrected double restore of interrupts problem. TX_BYTI.C Added logic to detect in-line initialization and avoid duplicate data declarations. TX_BYTR.C Changed to use ULONG_PTR type and added update of search pointer to the released memory block. TX_BYTS.C Changed to use ULONG_PTR type. TX_EFCLE.C Optimized out extra disable interrupts call. TX_EFI.C Added logic to detect in-line initialization and avoid duplicate data declarations. TX_EFS.C Changed to use ULONG_PTR type. TX_GHS.C Corrected __ghs_flock_create() for thread-safe I/O, remove MULTI stack checking code when TX_DISABLE_STACK_CHECKING is defined. TX_IHL.C Moved TX_INLINE_INITIALIZATION define to tx_port.h. TX_MCLE.C Optimized out extra disable interrupts call. TX_MI.C Added logic to detect in-line initialization and avoid duplicate data declarations. TX_QCLE.C Optimized out extra disable interrupts call. TX_QFS.C Changed to use ULONG_PTR type. TX_QI.C Added logic to detect in-line initialization and avoid duplicate data declarations. TX_QR.C Changed to use ULONG_PTR type. TX_QS.C Changed to use ULONG_PTR type. TX_SCLE.C Optimized out extra disable interrupts call. TX_SI.C Added logic to detect in-line initialization and avoid duplicate data declarations. TX_TI.C Changed to use UCHAR_PTR type. TX_TIMI.C Added logic for setting up the system timer thread's stack and priority, moving the setup from the TX_ILL. TX_TPCH.C Moved check for valid preemption-threshold to txe_tpch.c and optimized return case when preemption is needed. TX_TPRCH.C Moved check for valid priority to txe_trpc.c. TX_TSA.C Optimized out extra disable interrupts call. TX_TTE.C Changed constant from TX_FOREVER to TX_LOOP_FOREVER. TX_TTO.C Optimized out extra disable interrupts call. TXE_MG.C Added check for valid caller of this service. TXE_QF.C Allow this service to be called from anywhere. TXE_TPCH.C Moved check for valid preemption-threshold here. TXE_TRPC.C Moved check for valid priority here. TX_ILL.MIP Removed timer thread stack and priority setup. TX_TS.MIP Changed addi to addu. TXR*.C Added run-time error checking routines for MULTI, including the run-time stack checking function _stkchk() which is defined in TXR_GHS.C. User programs built with the -Xstackcheck option can take advantage of this feature. TX*.C Changed comments and copyright header. TX*.H Changed comments and copyright header. TX*.MIP Changed comments and copyright header. 01/28/2001 ThreadX update of MIPS32_4Kx/Green Hills port and new ThreadX Version 4.0 Generic Code. The following files were changed/added for version G4.0.4.0: TX_API.H Added TX_MUTEX object, added a new member to the thread control block, and added new Version 4.0 service call prototypes and constants. TX_BLO.H Added in-line block pool initialize capability and new block pool service prototypes. TX_BYT.H Added in-line byte pool initialize capability and new byte pool service prototypes. TX_EL.H Corrected problem with filtering semaphore events, added new Version 4.0 service calls, and made the include file more generic. TX_EVE.H Added in-line event flag initialize capability and new event flag service prototypes. TX_GHS.H Simplified and cleaned up. TX_PORT.H Changed version ID. TX_QUE.H Added in-line queue initialize capability and new queue service prototypes. TX_SEM.H Added in-line initialization capability and new semaphore service prototypes. TX_THR.H Added group masks for optimizing and added new service prototypes. TX_TIM.H Added new service prototypes. TX_BYTR.C Removed reset of the search pointer on memory release. TX_BYTS.C Added code to updated search pointer to next block on a successful search. TX_EL.C Converted into a generic file that is the same on all ports of ThreadX. TX_GHS.C Simplified by using new ThreadX Version 4.0 MUTEX and cleaned up. TX_IHL.C Added mutex initialization and in-line initialization. TX_QR.C Optimized message copy code. TX_QS.C Optimized message copy code. TX_TC.C Added zero initi ... ...

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