ucosman.ps

UCSO在三星S3C44B0X CPU上的移植。ｅｊｏｙ ｉｔ

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%%EndProlog
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSInit\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSInit\050\051) 506.67 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(1) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSInit) 108 708 T
0 14 Q
(Initialize) 135 674.67 T
1 F
(m) 188.27 674.67 T
0 F
(C/OS internal data structures.) 196.33 674.67 T
3 11 Q
(#include \322ucos.h\323;) 135 646.67 T
(void OSInit\050void\051;) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
3 11 Q
-0.18 (OSInit\050\051) 135 565 P
0 12 Q
-0.08 ( initializes the internal data structures of) 187.8 565 P
1 F
-0.08 ( m) 379.94 565 P
0 F
-0.08 (C/OS and resets the PID board.) 389.77 565 P
-0.52 (Upon entering,) 135 545 P
3 11 Q
-1.14 (OSInit\050\051) 208.95 545 P
0 12 Q
-0.52 ( uses) 261.75 545 P
3 11 Q
-1.14 (PIDInit\050\051) 287.38 545 P
0 12 Q
-0.52 ( to initialize the PID interrupt controller) 346.78 545 P
-0.52 (,) 534.52 545 P
(and the 16C551 serial communication controller) 135 531 T
(.) 366.65 531 T
3 11 Q
(PIDInit\050\051) 372.65 531 T
0 12 Q
( installs also new) 432.05 531 T
-0.38 (exeption handlers for IRQ interrupt requests, FIQ fast interrupt requests and for SWI) 135 517 P
-0.1 (software interrupts. These exeption handlers allow for user) 135 503 P
-0.1 (-de\336ned interrupt service) 416.66 503 P
(routines to be installed at subsequent times. No speci\336c interrupt service routine is) 135 489 T
(installed by) 135 475 T
3 11 Q
(OSInit\050\051) 193.67 475 T
0 12 Q
(.) 246.47 475 T
-0.04 (After initializing the PID board,) 135 455 P
3 11 Q
-0.08 (OSInit\050\051) 291.46 455 P
0 12 Q
-0.04 ( switches the ARM processor into super-) 344.26 455 P
(visor mode SVC32 and disables interrupts. Interrupts remain disabled until the) 135 441 T
1 F
(m) 515.64 441 T
0 F
(C/) 522.55 441 T
-0.13 (OS scheduler is activated with a call to) 135 427 P
3 11 Q
-0.28 (OSStart\050\051) 323.95 427 P
0 12 Q
-0.13 (. Finally) 383.35 427 P
-0.13 (, the idle task at the low-) 422.45 427 P
(est priority OS_LO_PRIO is created.) 135 413 T
2 F
(NOTES) 108 384.33 T
3 11 Q
-0.89 (OSInit\050\051) 135 363 P
0 12 Q
-0.41 ( must be called prior to calling any other) 187.8 363 P
1 F
-0.41 (m) 381.79 363 P
0 F
-0.41 (C/OS system call. After calling) 388.7 363 P
3 11 Q
-0.06 (OSInit\050\051) 135 349 P
0 12 Q
-0.03 ( the ARM CPU is in SVC32 mode. The) 187.8 349 P
1 F
-0.03 (m) 380.9 349 P
0 F
-0.03 (C/OS kernel requires the ARM) 387.82 349 P
(CPU to remain in this or other priviliged mode while using its services.) 135 335 T
(The) 135 315 T
1 F
(m) 156.66 315 T
0 F
(C/OS kernel assumes that the ARM CPU has been initialized by some other) 163.57 315 T
(startup code, such us the PID ROM-resident monitor demon, in the appropriate 32) 135 301 T
-0.14 (bit mode, with the MMU enabled and a page table initialized. It is also assumed that) 135 287 P
(stacks for each mode are allocated and that the stack pointer registers are initialized.) 135 273 T
-0.44 (The PID demon is deactivated byt he) 135 253 P
1 F
-0.44 (m) 312.88 253 P
0 F
-0.44 (C/OS kernel and the PID board has to be reset) 319.79 253 P
(to use it again.) 135 239 T
2 F
(SEE ALSO) 108 210.33 T
3 11 Q
(OSStart\050\051, IRQInstall\050\051, FIQInstall\050\051, SWIInstall\050\051.) 135 189.67 T
FMENDPAGE
%%EndPage: "1" 2
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSStart\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSStart\050\051) 501.67 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(2) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSStart) 108 708 T
0 14 Q
(Start the scheduler and multi-tasking under) 135 674.67 T
1 12 Q
(m) 379.97 674.67 T
2 F
(C/OS) 386.88 674.67 T
2 14 Q
(.) 414.89 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSStart\050void\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
3 11 Q
-0.68 (OSStart\050\051) 135 565 P
0 12 Q
-0.31 ( is called to start the multi-tasking activity of the) 194.4 565 P
1 F
-0.31 (m) 427.3 565 P
0 F
-0.31 (C/OS kernel. It has to) 434.22 565 P
-0.25 (be invoked after) 135 551 P
3 11 Q
-0.56 (OSInit\050\051) 215.21 551 P
0 12 Q
-0.25 ( and it completes the) 268.01 551 P
1 F
-0.25 (m) 369.07 551 P
0 F
-0.25 (C/OS inititialization. Splitting the) 375.98 551 P
1 F
(m) 135 537 T
0 F
(C/OS initialization into two steps gives a chance to the application\325) 141.91 537 T
(s programmer) 464.57 537 T
(using) 135 523 T
1 F
(m) 164 523 T
0 F
(C/OS, to create data structures and tasks without having) 170.92 523 T
1 F
(m) 442.88 523 T
0 F
(C/OS activated.) 449.8 523 T
(This system call installs also the standard timer interrupt routine used by) 135 503 T
1 F
(m) 486.31 503 T
0 F
(C/OS as) 493.22 503 T
(regular interrupt IRQ using interrupt #1 in the PID interrupt controller) 135 489 T
(. The PID) 470.96 489 T
-0.05 (timer is therefore for exclusive use by the) 135 475 P
1 F
-0.05 (m) 337.24 475 P
0 F
-0.05 (C/OS kernel. However) 344.15 475 P
-0.05 (,) 453.23 475 P
1 F
-0.05 (m) 459.18 475 P
0 F
-0.05 (C/OS provides) 466.09 475 P
-0.39 (other services for getting the current system time or delay a task for a certain number) 135 461 P
(of system ticks.) 135 447 T
(T) 135 427 T
(o manually change the way the system tick is handled, look at the routine) 141.49 427 T
3 11 Q
(OSTimeTick\050\051) 135 413 T
0 12 Q
(.) 214.2 413 T
2 F
(NOTES) 108 384.33 T
3 11 Q
(OSStart\050\051) 135 363 T
0 12 Q
( never returns.) 194.4 363 T
2 F
(SEE ALSO) 108 334.33 T
3 11 Q
(OSInit\050\051, IRQInstall\050\051, OSTimeGet\050\051, OSTimeDly\050\051.) 135 313.67 T
FMENDPAGE
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612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSDisableInt\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSDisableInt\050\051) 478.9 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(3) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSDisableInt) 108 708 T
0 14 Q
(Disable interrupts.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSDisableInt\050void\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
3 11 Q
-0.61 (OSDisableInt\050\051) 135 565 P
0 12 Q
-0.28 ( disables both FIQs and IRQs changing the current process status) 227.4 565 P
(register of the ARM. It is used to protect critical regions in application code.) 135 551 T
2 F
(NOTES) 108 522.33 T
0 F
(When executing an interrupt service routine registered with) 135 501 T
3 11 Q
(IRQInstall\050\051) 423.6 501 T
0 12 Q
( or) 502.8 501 T
3 11 Q
(FIQInstall\050\051) 135 487 T
0 12 Q
(, interrupts are re-enabled before entering the interrupt service rou-) 214.2 487 T
(tine, if they were enabled prior to the interrupt.) 135 473 T
(There are no limitations in using) 135 453 T
3 11 Q
(OSDisableInt\050\051) 294.32 453 T
0 12 Q
( inside an interrupt service rou-) 386.72 453 T
(tine. At the exit of an interrupt service routine the ARM process status register is) 135 439 T
(restored to the value it had at the time the interrupt occurred.) 135 425 T
(Even though the application is running in privileged mode it is not reccomended to) 135 405 T
(change the I and F interrupt \337ags in the CPSR directly) 135 391 T
(.) 394.87 391 T
2 F
(SEE ALSO) 108 362.33 T
3 11 Q
(OSEnableInt\050\051, IRQInstall\050\051, FIQInstall\050\051.) 135 341.67 T
FMENDPAGE
%%EndPage: "3" 4
%%Page: "4" 4
612 792 0 FMBEGINPAGE
0 10 Q
0 X
0 K
(OSEnableInt\050\051) 108 749.33 T
1 F
(m) 282.5 749.33 T
0 F
(C/OS System Calls) 288.26 749.33 T
(OSEnableInt\050\051) 481.68 749.33 T
108 54 540 54 2 L
1 H
2 Z
N
(VLSI T) 108 41.28 T
(echnology Inc.) 138.13 41.28 T
(July 1, 1993) 299.42 41.28 T
(4) 535 41.28 T
108 738 540 738 2 L
N
2 18 Q
(OSEnableInt) 108 708 T
0 14 Q
(Enable interrupts.) 135 674.67 T
3 11 Q
(#include \322ucos.h\323) 135 646.67 T
(void OSEnableInt\050void\051) 135 616.67 T
2 12 Q
(DESCRIPTION) 108 586.33 T
3 11 Q
(OSEnableInt\050\051) 135 565 T
0 12 Q
( enables both FIQs and IRQs in the ARM CPU. A call to) 220.8 565 T
3 11 Q
(OSEnableInt\050\051) 135 551 T
0 12 Q
( always results in resetting the I and F bits in the current process) 220.8 551 T
(status register CPSR, regardless their previous values.) 135 537 T
2 F
(NOTES) 108 508.33 T
0 F
(Always use) 135 487 T
3 11 Q
(OSEnableInt\050\051) 193.66 487 T
0 12 Q
( in pair with) 279.46 487 T
3 11 Q
(OSDisableInt\050\051) 340.79 487 T
0 12 Q
(.) 433.19 487 T
(No nesting of) 135 467 T
3 11 Q
(OSDisableInt\050\051) 203.33 467 T
0 12 Q
( is allowed. That is, the interrupts will be re-) 295.73 467 T
(enabled a the \336rst) 135 453 T
3 11 Q
(OSEnableInt\050\051) 222.98 453 T
0 12 Q
( call, regardless of the number of previous) 308.78 453 T
3 11 Q
(OSDisableInt\050\051) 135 439 T
0 12 Q
(.) 227.4 439 T