<div dir="ltr"><div dir="ltr"><div dir="ltr"><div>i searched it by add -i <br></div><div><br></div><div>56794:0000d040 <_CPU_Thread_Idle_body>:<br>56795-#ifdef ARM_MULTILIB_HAS_WFI<br>56796-<br>56797:void *_CPU_Thread_Idle_body( uintptr_t ignored )<br>56798-{<br>56799- while ( true ) {<br>56800- __asm__ volatile ("wfi");<br>56801- d040: bf30 wfi<br>56802- }<br>56803: d042: e7fd b.n d040 <_CPU_Thread_Idle_body><br>56804-<br>56805-0000d044 <rtems_filesystem_default_close>:<br>56806-int rtems_filesystem_default_close(<br>56807- rtems_libio_t *iop<br>56808-)<br>56809-{<br>56810- return 0;<br>56811-}<br>56812- d044: 2000 movs r0, #0<br>56813- d046: 4770 bx lr<br></div><div><br></div><div><br></div><div>that's to say when i want to enter low power i just need to call sleep or rtems_task_wake_after or just while(1); ?<br></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 24, 2019 at 4:36 PM Christian Mauderer <<a href="mailto:christian.mauderer@embedded-brains.de">christian.mauderer@embedded-brains.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">For some reason your grep hasn't found the _CPU_Thread_Idle_body. It's<br>
possible that the stm32f4 uses some other function for that also I don't<br>
know why.<br>
<br>
For example for the xilinx_zynq_a9_qemu BSP the disassembled idle body<br>
looks like follows:<br>
<br>
void *_CPU_Thread_Idle_body( uintptr_t ignored )<br>
{<br>
11d70: b480 push {r7}<br>
11d72: b083 sub sp, #12<br>
11d74: af00 add r7, sp, #0<br>
11d76: 6078 str r0, [r7, #4]<br>
while ( true ) {<br>
#ifdef ARM_MULTILIB_HAS_WFI<br>
__asm__ volatile ("wfi");<br>
11d78: bf30 wfi<br>
11d7a: e7fd b.n 11d78 <_CPU_Thread_Idle_body+0x8><br>
<br>
Am 24.04.19 um 10:25 schrieb Jython:<br>
> arm-rtems4.11-objdump -dS hello.exe | grep idle --color=auto -n -B 5 -A 12<br>
> <br>
> there is no idle function which calls wfi command<br>
> // log<br>
> 508- <br>
> 509- <br>
> 510- <br>
> 511- }<br>
> 512- <br>
> 513: if((*USART2_SR) & (1<<4)) // idle<br>
> 514- 3aa: 4b13 ldr r3, [pc, #76] ; (3f8<br>
> <USART2_handler+0x94>)<br>
> 515- 3ac: 681b ldr r3, [r3, #0]<br>
> 516- 3ae: 681b ldr r3, [r3, #0]<br>
> 517- 3b0: f003 0310 and.w r3, r3, #16<br>
> 518- 3b4: 2b00 cmp r3, #0<br>
> 519- 3b6: d00a beq.n 3ce <USART2_handler+0x6a><br>
> 520- {<br>
> 521: //printk("idle ");<br>
> 522- <br>
> 523- temp = (*USART2_SR);<br>
> 524- 3b8: 4b0f ldr r3, [pc, #60] ; (3f8<br>
> <USART2_handler+0x94>)<br>
> 525- 3ba: 681b ldr r3, [r3, #0]<br>
> 526- 3bc: 681b ldr r3, [r3, #0]<br>
> 527- 3be: 60fb str r3, [r7, #12]<br>
> 528- temp = (*USART2_DR);<br>
> 529- 3c0: 4b0f ldr r3, [pc, #60] ; (400<br>
> <USART2_handler+0x9c>)<br>
> 530- 3c2: 681b ldr r3, [r3, #0]<br>
> 531- 3c4: 681b ldr r3, [r3, #0]<br>
> 532- 3c6: 60fb str r3, [r7, #12]<br>
> 533- //temp = temp;<br>
> --<br>
> 627- <br>
> 628- <br>
> 629- <br>
> 630- }<br>
> 631- <br>
> 632: if((*USART3_SR) & (1<<4)) // idle<br>
> 633- 44c: 4b12 ldr r3, [pc, #72] ; (498<br>
> <USART3_handler+0x8c>)<br>
> 634- 44e: 681b ldr r3, [r3, #0]<br>
> 635- 450: 681b ldr r3, [r3, #0]<br>
> 636- 452: f003 0310 and.w r3, r3, #16<br>
> 637- 456: 2b00 cmp r3, #0<br>
> 638- 458: d00a beq.n 470 <USART3_handler+0x64><br>
> 639- {<br>
> 640: //printk("idle ");<br>
> 641- <br>
> 642- temp = (*USART3_SR);<br>
> 643- 45a: 4b0f ldr r3, [pc, #60] ; (498<br>
> <USART3_handler+0x8c>)<br>
> 644- 45c: 681b ldr r3, [r3, #0]<br>
> 645- 45e: 681b ldr r3, [r3, #0]<br>
> 646- 460: 60fb str r3, [r7, #12]<br>
> 647- temp = (*USART3_DR);<br>
> 648- 462: 4b0f ldr r3, [pc, #60] ; (4a0<br>
> <USART3_handler+0x94>)<br>
> 649- 464: 681b ldr r3, [r3, #0]<br>
> 650- 466: 681b ldr r3, [r3, #0]<br>
> 651- 468: 60fb str r3, [r7, #12]<br>
> 652- <br>
> --<br>
> 26329-<br>
> 26330- if (newTail == tty->rawOutBuf.Head) {<br>
> 26331- /*<br>
> 26332- * Buffer has become empty<br>
> 26333- */<br>
> 26334: tty->rawOutBufState = rob_idle;<br>
> 26335- 69a0: f880 5094 strb.w r5, [r0, #148] ; 0x94<br>
> 26336- (*tty->handler.write) (ctx, NULL, 0);<br>
> 26337- 69a4: f8d4 30c4 ldr.w r3, [r4, #196] ; 0xc4<br>
> 26338- 69a8: 4670 mov r0, lr<br>
> 26339- 69aa: 4629 mov r1, r5<br>
> 26340- 69ac: 462a mov r2, r5<br>
> 26341- 69ae: 4798 blx r3<br>
> 26342- nToSend = 0;<br>
> 26343-<br>
> 26344- /*<br>
> 26345- * check to see if snd wakeup callback was set<br>
> 26346- */<br>
> --<br>
> 26443- 6a12: 2600 movs r6, #0<br>
> 26444- 6a14: e7ac b.n 6970<br>
> <rtems_termios_refill_transmitter+0x7c><br>
> 26445- /*<br>
> 26446- * Buffer has become empty<br>
> 26447- */<br>
> 26448: tty->rawOutBufState = rob_idle;<br>
> 26449- (*tty->handler.write) (ctx, NULL, 0);<br>
> 26450- nToSend = 0;<br>
> 26451- 6a16: 461d mov r5, r3<br>
> 26452- 6a18: e7aa b.n 6970<br>
> <rtems_termios_refill_transmitter+0x7c><br>
> 26453- 6a1a: bf00 nop<br>
> 26454-<br>
> 26455-00006a1c <rtems_termios_txdaemon>:<br>
> 26456-<br>
> 26457-/*<br>
> 26458- * this task actually processes any transmit events<br>
> 26459- */<br>
> 26460-static rtems_task rtems_termios_txdaemon(rtems_task_argument argument)<br>
> --<br>
> 27083- RTEMS_NO_PRIORITY,<br>
> 27084- &tty->rawOutBuf.Semaphore);<br>
> 27085- if (sc != RTEMS_SUCCESSFUL)<br>
> 27086- 6cc0: 2800 cmp r0, #0<br>
> 27087- 6cc2: f040 80d6 bne.w 6e72<br>
> <rtems_termios_open_tty+0x2de><br>
> 27088: tty->rawOutBufState = rob_idle;<br>
> 27089-<br>
> 27090- /*<br>
> 27091- * Set callbacks<br>
> 27092- */<br>
> 27093- if (device_node != NULL) {<br>
> 27094- 6cc6: 9b0e ldr r3, [sp, #56] ; 0x38<br>
> 27095- RTEMS_SIMPLE_BINARY_SEMAPHORE | RTEMS_FIFO,<br>
> 27096- RTEMS_NO_PRIORITY,<br>
> 27097- &tty->rawOutBuf.Semaphore);<br>
> 27098- if (sc != RTEMS_SUCCESSFUL)<br>
> 27099- rtems_fatal_error_occurred (sc);<br>
> 27100: tty->rawOutBufState = rob_idle;<br>
> 27101- 6cc8: f884 0094 strb.w r0, [r4, #148] ; 0x94<br>
> 27102-<br>
> 27103- /*<br>
> 27104- * Set callbacks<br>
> 27105- */<br>
> 27106- if (device_node != NULL) {<br>
> 27107- 6ccc: 2b00 cmp r3, #0<br>
> 27108- 6cce: f000 80e9 beq.w 6ea4<br>
> <rtems_termios_open_tty+0x310><br>
> 27109- device_node->tty = tty;<br>
> 27110- tty->handler = *device_node->handler;<br>
> 27111- 6cd2: f104 0cb8 add.w ip, r4, #184 ; 0xb8<br>
> 27112- 6cd6: 4666 mov r6, ip<br>
> --<br>
> 29226- /* disable interrupts */<br>
> 29227- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 29228- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 29229- 7442: f8d4 30d8 ldr.w r3, [r4, #216] ; 0xd8<br>
> 29230- /* check for chars in output buffer (or rob_state?) */<br>
> 29231: if (tty->rawOutBufState != rob_idle) {<br>
> 29232- 7446: f894 2094 ldrb.w r2, [r4, #148] ; 0x94<br>
> 29233-<br>
> 29234- /* has output been stopped due to received XOFF? */<br>
> 29235- if (tty->flow_ctrl & FL_OSTOP) {<br>
> 29236- /* disable interrupts */<br>
> 29237- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 29238- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 29239- 744a: f023 0320 bic.w r3, r3, #32<br>
> 29240- 744e: f8c4 30d8 str.w r3, [r4, #216] ; 0xd8<br>
> 29241- /* check for chars in output buffer (or rob_state?) */<br>
> 29242: if (tty->rawOutBufState != rob_idle) {<br>
> 29243- 7452: 2a00 cmp r2, #0<br>
> 29244- 7454: f040 80cf bne.w 75f6 <rtems_termios_ioctl+0x306><br>
> 29245- ARM_SWITCH_BACK<br>
> 29246- : ARM_SWITCH_OUTPUT<br>
> 29247- : [level] "r" (level)<br>
> 29248- );<br>
> 29249-#elif defined(ARM_MULTILIB_ARCH_V7M)<br>
> 29250- __asm__ volatile (<br>
> 29251- 7458: f387 8811 msr BASEPRI, r7<br>
> 29252- /* reenable interrupts */<br>
> 29253- rtems_termios_device_lock_release (ctx, &lock_context);<br>
> 29254- }<br>
> --<br>
> 29492-<br>
> 29493- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 29494- tty->rawOutBuf.Tail = 0;<br>
> 29495- 7572: f8c4 0084 str.w r0, [r4, #132] ; 0x84<br>
> 29496- tty->rawOutBuf.Head = 0;<br>
> 29497: tty->rawOutBufState = rob_idle;<br>
> 29498- 7576: f884 0094 strb.w r0, [r4, #148] ; 0x94<br>
> 29499- rtems_termios_device_context *ctx = tty->device_context;<br>
> 29500- rtems_interrupt_lock_context lock_context;<br>
> 29501-<br>
> 29502- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 29503- tty->rawOutBuf.Tail = 0;<br>
> 29504- tty->rawOutBuf.Head = 0;<br>
> 29505- 757a: f8c4 0080 str.w r0, [r4, #128] ; 0x80<br>
> 29506- ARM_SWITCH_BACK<br>
> 29507- : ARM_SWITCH_OUTPUT<br>
> 29508- : [level] "r" (level)<br>
> 29509- );<br>
> --<br>
> 29562-<br>
> 29563- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 29564- tty->rawOutBuf.Tail = 0;<br>
> 29565- 75b0: f8c4 0084 str.w r0, [r4, #132] ; 0x84<br>
> 29566- tty->rawOutBuf.Head = 0;<br>
> 29567: tty->rawOutBufState = rob_idle;<br>
> 29568- 75b4: f884 0094 strb.w r0, [r4, #148] ; 0x94<br>
> 29569- rtems_termios_device_context *ctx = tty->device_context;<br>
> 29570- rtems_interrupt_lock_context lock_context;<br>
> 29571-<br>
> 29572- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 29573- tty->rawOutBuf.Tail = 0;<br>
> 29574- tty->rawOutBuf.Head = 0;<br>
> 29575- 75b8: f8c4 0080 str.w r0, [r4, #128] ; 0x80<br>
> 29576- ARM_SWITCH_BACK<br>
> 29577- : ARM_SWITCH_OUTPUT<br>
> 29578- : [level] "r" (level)<br>
> 29579- );<br>
> --<br>
> 29629- 75f0: 2301 movs r3, #1<br>
> 29630- 75f2: 66e3 str r3, [r4, #108] ; 0x6c<br>
> 29631- 75f4: e77e b.n 74f4 <rtems_termios_ioctl+0x204><br>
> 29632- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 29633- /* check for chars in output buffer (or rob_state?) */<br>
> 29634: if (tty->rawOutBufState != rob_idle) {<br>
> 29635- /* if chars available, call write function... */<br>
> 29636- (*tty->handler.write)(<br>
> 29637- ctx, &tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail],1);<br>
> 29638- 75f6: f8d4 2084 ldr.w r2, [r4, #132] ; 0x84<br>
> 29639- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 29640- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 29641- /* check for chars in output buffer (or rob_state?) */<br>
> 29642: if (tty->rawOutBufState != rob_idle) {<br>
> 29643- /* if chars available, call write function... */<br>
> 29644- (*tty->handler.write)(<br>
> 29645- 75fa: 6fe1 ldr r1, [r4, #124] ; 0x7c<br>
> 29646- 75fc: f8d4 30c4 ldr.w r3, [r4, #196] ; 0xc4<br>
> 29647- 7600: 4411 add r1, r2<br>
> 29648- 7602: 4628 mov r0, r5<br>
> 29649- 7604: 2201 movs r2, #1<br>
> 29650- 7606: 4798 blx r3<br>
> 29651- 7608: e726 b.n 7458 <rtems_termios_ioctl+0x168><br>
> 29652- 760a: bf00 nop<br>
> 29653-<br>
> 29654-0000760c <rtems_termios_puts>:<br>
> --<br>
> 29815- 76b2: bf24 itt cs<br>
> 29816- 76b4: f8d4 2088 ldrcs.w r2, [r4, #136] ; 0x88<br>
> 29817- 76b8: 1a9b subcs r3, r3, r2<br>
> 29818- tty->rawOutBuf.Head = newHead;<br>
> 29819-<br>
> 29820: if (tty->rawOutBufState == rob_idle) {<br>
> 29821- 76ba: f894 2094 ldrb.w r2, [r4, #148] ; 0x94<br>
> 29822- memcpy(&tty->rawOutBuf.theBuf[tty->rawOutBuf.Head], buf, nToCopy);<br>
> 29823-<br>
> 29824- newHead = tty->rawOutBuf.Head + nToCopy;<br>
> 29825- if (newHead >= tty->rawOutBuf.Size)<br>
> 29826- newHead -= tty->rawOutBuf.Size;<br>
> 29827- tty->rawOutBuf.Head = newHead;<br>
> 29828- 76be: f8c4 3080 str.w r3, [r4, #128] ; 0x80<br>
> 29829-<br>
> 29830: if (tty->rawOutBufState == rob_idle) {<br>
> 29831- 76c2: b192 cbz r2, 76ea <rtems_termios_puts+0xde><br>
> 29832- ARM_SWITCH_BACK<br>
> 29833- : ARM_SWITCH_OUTPUT<br>
> 29834- : [level] "r" (level)<br>
> 29835- );<br>
> 29836-#elif defined(ARM_MULTILIB_ARCH_V7M)<br>
> 29837- __asm__ volatile (<br>
> 29838- 76c4: f385 8811 msr BASEPRI, r5<br>
> 29839- if (tty->handler.mode == TERMIOS_POLLED) {<br>
> 29840- (*tty->handler.write)(ctx, buf, len);<br>
> 29841- return;<br>
> 29842- }<br>
> --<br>
> 29885- 76e8: e7d2 b.n 7690 <rtems_termios_puts+0x84><br>
> 29886- if (newHead >= tty->rawOutBuf.Size)<br>
> 29887- newHead -= tty->rawOutBuf.Size;<br>
> 29888- tty->rawOutBuf.Head = newHead;<br>
> 29889-<br>
> 29890: if (tty->rawOutBufState == rob_idle) {<br>
> 29891- startXmit (tty, tty->rawOutBuf.Tail, false);<br>
> 29892- 76ea: f8d4 1084 ldr.w r1, [r4, #132] ; 0x84<br>
> 29893- 76ee: 4620 mov r0, r4<br>
> 29894- 76f0: f7ff f8ca bl 6888 <startXmit><br>
> 29895- 76f4: e7e6 b.n 76c4 <rtems_termios_puts+0xb8><br>
> 29896- rtems_termios_device_context *ctx = tty->device_context;<br>
> 29897- rtems_interrupt_lock_context lock_context;<br>
> 29898- rtems_status_code sc;<br>
> 29899-<br>
> 29900- if (tty->handler.mode == TERMIOS_POLLED) {<br>
> 29901- (*tty->handler.write)(ctx, buf, len);<br>
> 29902- 76f6: f8d2 30c4 ldr.w r3, [r2, #196] ; 0xc4<br>
> --<br>
> 31283- while ((tty->rawInBuf.Head != tty->rawInBuf.Tail) &&<br>
> 31284- 7be4: 428a cmp r2, r1<br>
> 31285- 7be6: f04f 0501 mov.w r5, #1<br>
> 31286- 7bea: d968 bls.n 7cbe <rtems_termios_read+0x1a6><br>
> 31287- == (FL_MDXON | FL_ISNTXOF))<br>
> 31288: && ((tty->rawOutBufState == rob_idle)<br>
> 31289- || (tty->flow_ctrl & FL_OSTOP))) {<br>
> 31290- /* XON should be sent now... */<br>
> 31291- (*tty->handler.write)(<br>
> 31292- tty->device_context, (void<br>
> *)&(tty->termios.c_cc[VSTART]), 1);<br>
> 31293- 7bec: f104 0849 add.w r8, r4, #73 ; 0x49<br>
> 31294- 7bf0: e012 b.n 7c18 <rtems_termios_read+0x100><br>
> 31295-<br>
> 31296- rtems_termios_device_lock_release (ctx, &lock_context);<br>
> 31297-<br>
> 31298- /* continue processing new character */<br>
> 31299- if (tty->termios.c_lflag & ICANON) {<br>
> 31300- if (siproc (c, tty))<br>
> --<br>
> 31401- if (((tty->flow_ctrl & (FL_MDXON | FL_ISNTXOF))<br>
> 31402- 7c56: f8d4 20d8 ldr.w r2, [r4, #216] ; 0xd8<br>
> 31403- 7c5a: 4013 ands r3, r2<br>
> 31404- 7c5c: 4553 cmp r3, sl<br>
> 31405- 7c5e: d01e beq.n 7c9e <rtems_termios_read+0x186><br>
> 31406: && ((tty->rawOutBufState == rob_idle)<br>
> 31407- || (tty->flow_ctrl & FL_OSTOP))) {<br>
> 31408- /* XON should be sent now... */<br>
> 31409- (*tty->handler.write)(<br>
> 31410- tty->device_context, (void<br>
> *)&(tty->termios.c_cc[VSTART]), 1);<br>
> 31411- } else if (tty->flow_ctrl & FL_MDRTS) {<br>
> 31412- 7c60: f8d4 30d8 ldr.w r3, [r4, #216] ; 0xd8<br>
> 31413- 7c64: 05da lsls r2, r3, #23<br>
> 31414- 7c66: d50b bpl.n 7c80 <rtems_termios_read+0x168><br>
> 31415- tty->flow_ctrl &= ~FL_IRTSOFF;<br>
> 31416- 7c68: f8d4 30d8 ldr.w r3, [r4, #216] ; 0xd8<br>
> 31417- /* activate RTS line */<br>
> 31418- if (tty->flow.start_remote_tx != NULL) {<br>
> --<br>
> 31477- < tty->lowwater) {<br>
> 31478- tty->flow_ctrl &= ~FL_IREQXOF;<br>
> 31479- /* if tx stopped and XON should be sent... */<br>
> 31480- if (((tty->flow_ctrl & (FL_MDXON | FL_ISNTXOF))<br>
> 31481- == (FL_MDXON | FL_ISNTXOF))<br>
> 31482: && ((tty->rawOutBufState == rob_idle)<br>
> 31483- 7c9e: f894 3094 ldrb.w r3, [r4, #148] ; 0x94<br>
> 31484- 7ca2: b11b cbz r3, 7cac <rtems_termios_read+0x194><br>
> 31485- || (tty->flow_ctrl & FL_OSTOP))) {<br>
> 31486- 7ca4: f8d4 30d8 ldr.w r3, [r4, #216] ; 0xd8<br>
> 31487- 7ca8: 0699 lsls r1, r3, #26<br>
> 31488- 7caa: d5d9 bpl.n 7c60 <rtems_termios_read+0x148><br>
> 31489- /* XON should be sent now... */<br>
> 31490- (*tty->handler.write)(<br>
> 31491- 7cac: f8d4 30c4 ldr.w r3, [r4, #196] ; 0xc4<br>
> 31492- 7cb0: f8d4 010c ldr.w r0, [r4, #268] ; 0x10c<br>
> 31493- 7cb4: 4641 mov r1, r8<br>
> 31494- 7cb6: 2201 movs r2, #1<br>
> --<br>
> 32101- /* disable interrupts */<br>
> 32102- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 32103- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 32104- 7f34: f8d4 30d8 ldr.w r3, [r4, #216] ; 0xd8<br>
> 32105- /* check for chars in output buffer (or rob_state?) */<br>
> 32106: if (tty->rawOutBufState != rob_idle) {<br>
> 32107- 7f38: f894 2094 ldrb.w r2, [r4, #148] ; 0x94<br>
> 32108- if (flow_rcv) {<br>
> 32109- /* restart output according to FL_ORCVXOF flag */<br>
> 32110- if ((tty->flow_ctrl & (FL_ORCVXOF | FL_OSTOP)) == FL_OSTOP) {<br>
> 32111- /* disable interrupts */<br>
> 32112- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 32113- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 32114- 7f3c: f023 0320 bic.w r3, r3, #32<br>
> 32115- 7f40: f8c4 30d8 str.w r3, [r4, #216] ; 0xd8<br>
> 32116- /* check for chars in output buffer (or rob_state?) */<br>
> 32117: if (tty->rawOutBufState != rob_idle) {<br>
> 32118- 7f44: b94a cbnz r2, 7f5a<br>
> <rtems_termios_enqueue_raw_characters+0x1ca><br>
> 32119- ARM_SWITCH_BACK<br>
> 32120- : ARM_SWITCH_OUTPUT<br>
> 32121- : [level] "r" (level)<br>
> 32122- );<br>
> 32123-#elif defined(ARM_MULTILIB_ARCH_V7M)<br>
> 32124- __asm__ volatile (<br>
> 32125- 7f46: f386 8811 msr BASEPRI, r6<br>
> 32126- 7f4a: 2601 movs r6, #1<br>
> 32127- 7f4c: e760 b.n 7e10<br>
> <rtems_termios_enqueue_raw_characters+0x80><br>
> 32128- if (( !tty->tty_rcvwakeup ) && ( tty->tty_rcv.sw_pfn !=<br>
> NULL )) {<br>
> 32129- (*tty->tty_rcv.sw_pfn)(&tty->termios, tty->tty_rcv.sw_arg);<br>
> --<br>
> 32136- 7f52: 9300 str r3, [sp, #0]<br>
> 32137- 7f54: f38a 8811 msr BASEPRI, sl<br>
> 32138- 7f58: e75a b.n 7e10<br>
> <rtems_termios_enqueue_raw_characters+0x80><br>
> 32139- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 32140- /* check for chars in output buffer (or rob_state?) */<br>
> 32141: if (tty->rawOutBufState != rob_idle) {<br>
> 32142- /* if chars available, call write function... */<br>
> 32143- (*tty->handler.write)(<br>
> 32144- ctx, &tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail], 1);<br>
> 32145- 7f5a: f8d4 2084 ldr.w r2, [r4, #132] ; 0x84<br>
> 32146- rtems_termios_device_lock_acquire (ctx, &lock_context);<br>
> 32147- tty->flow_ctrl &= ~FL_OSTOP;<br>
> 32148- /* check for chars in output buffer (or rob_state?) */<br>
> 32149: if (tty->rawOutBufState != rob_idle) {<br>
> 32150- /* if chars available, call write function... */<br>
> 32151- (*tty->handler.write)(<br>
> 32152- 7f5e: 6fe1 ldr r1, [r4, #124] ; 0x7c<br>
> 32153- 7f60: f8d4 30c4 ldr.w r3, [r4, #196] ; 0xc4<br>
> 32154- 7f64: 4411 add r1, r2<br>
> 32155- 7f66: 4658 mov r0, fp<br>
> 32156- 7f68: 2201 movs r2, #1<br>
> 32157- 7f6a: f8cd c004 str.w ip, [sp, #4]<br>
> 32158- 7f6e: 4798 blx r3<br>
> 32159- 7f70: f8dd c004 ldr.w ip, [sp, #4]<br>
> 32160- 7f74: e7e7 b.n 7f46<br>
> <rtems_termios_enqueue_raw_characters+0x1b6><br>
> 32161- + tty->rawInBuf.Size) % tty->rawInBuf.Size) ><br>
> tty->highwater)) {<br>
> --<br>
> 32167- 7f76: 0692 lsls r2, r2, #26<br>
> 32168- 7f78: d403 bmi.n 7f82<br>
> <rtems_termios_enqueue_raw_characters+0x1f2><br>
> 32169- 7f7a: f894 2094 ldrb.w r2, [r4, #148] ; 0x94<br>
> 32170- 7f7e: 2a00 cmp r2, #0<br>
> 32171- 7f80: d18c bne.n 7e9c<br>
> <rtems_termios_enqueue_raw_characters+0x10c><br>
> 32172: (tty->rawOutBufState == rob_idle)) {<br>
> 32173- /* if tx is stopped due to XOFF or out of data */<br>
> 32174- /* call write function here */<br>
> 32175- tty->flow_ctrl |= FL_ISNTXOF;<br>
> 32176- 7f82: f8d4 20d8 ldr.w r2, [r4, #216] ; 0xd8<br>
> 32177- 7f86: 9301 str r3, [sp, #4]<br>
> 32178- 7f88: f042 0202 orr.w r2, r2, #2<br>
> 32179- 7f8c: f8c4 20d8 str.w r2, [r4, #216] ; 0xd8<br>
> 32180- (*tty->handler.write)(ctx,<br>
> 32181- 7f90: f8d4 30c4 ldr.w r3, [r4, #196] ; 0xc4<br>
> 32182- 7f94: 4658 mov r0, fp<br>
> 32183- 7f96: f104 014a add.w r1, r4, #74 ; 0x4a<br>
> 32184- 7f9a: 2201 movs r2, #1<br>
> --<br>
> 38521- 9512: f000 f825 bl 9560<br>
> <_Extension_Manager_initialization><br>
> 38522-<br>
> 38523- _POSIX_API_Initialize();<br>
> 38524- 9516: f000 f863 bl 95e0 <_POSIX_API_Initialize><br>
> 38525- 951a: 7025 strb r5, [r4, #0]<br>
> 38526: _Thread_Create_idle();<br>
> 38527-<br>
> 38528- /*<br>
> 38529- * Scheduling can properly occur now as long as we avoid<br>
> dispatching.<br>
> 38530- */<br>
> 38531-}<br>
> 38532- 951c: e8bd 4038 ldmia.w sp!, {r3, r4, r5, lr}<br>
> 38533- * _Thread_Executing and _Thread_Heir are not set.<br>
> 38534- *<br>
> 38535- * At this point all API extensions are in place. After the<br>
> call to<br>
> 38536: * _Thread_Create_idle() _Thread_Executing and _Thread_Heir<br>
> will be set.<br>
> 38537- */<br>
> 38538: _Thread_Create_idle();<br>
> 38539: 9520: f002 ba3a b.w b998 <_Thread_Create_idle><br>
> 38540- 9524: 20004618 .word 0x20004618<br>
> 38541- 9528: 20004640 .word 0x20004640<br>
> 38542- 952c: 200041d0 .word 0x200041d0<br>
> 38543- 9530: 200041e0 .word 0x200041e0<br>
> 38544- 9534: 2000429c .word 0x2000429c<br>
> 38545- 9538: 20004298 .word 0x20004298<br>
> 38546-<br>
> 38547-0000953c <rtems_initialize_before_drivers>:<br>
> 38548- * Scheduling can properly occur now as long as we avoid<br>
> dispatching.<br>
> 38549- */<br>
> 38550-}<br>
> 38551-<br>
> --<br>
> 48137-)<br>
> 48138-{<br>
> 48139- b3c4: 4770 bx lr<br>
> 48140- b3c6: bf00 nop<br>
> 48141-<br>
> 48142:0000b3c8 <_Scheduler_default_Start_idle>:<br>
> 48143-#if defined(RTEMS_SMP)<br>
> 48144- Thread_Control *needs_help;<br>
> 48145-<br>
> 48146- needs_help =<br>
> 48147-#endif<br>
> 48148- ( *scheduler->Operations.unblock )( scheduler, the_thread );<br>
> 48149: b3c8: 4801 ldr r0, [pc, #4] ; (b3d0<br>
> <_Scheduler_default_Start_idle+0x8>)<br>
> 48150- b3ca: 6943 ldr r3, [r0, #20]<br>
> 48151- b3cc: 4718 bx r3<br>
> 48152- b3ce: bf00 nop<br>
> 48153- b3d0: 0001847c .word 0x0001847c<br>
> 48154-<br>
> 48155-0000b3d4 <_Scheduler_default_Tick>:<br>
> 48156- /*<br>
> 48157- * If the thread is not preemptible or is not ready, then<br>
> 48158- * just return.<br>
> 48159- */<br>
> 48160-<br>
> 48161- if ( !executing->is_preemptible )<br>
> --<br>
> 49735- b988: 0001847c .word 0x0001847c<br>
> 49736- b98c: 0001d828 .word 0x0001d828<br>
> 49737- b990: 0001d814 .word 0x0001d814<br>
> 49738- b994: 0001d878 .word 0x0001d878<br>
> 49739-<br>
> 49740:0000b998 <_Thread_Create_idle>:<br>
> 49741- cpu<br>
> 49742- );<br>
> 49743-}<br>
> 49744-<br>
> 49745:void _Thread_Create_idle( void )<br>
> 49746-{<br>
> 49747- b998: b5f0 push {r4, r5, r6, r7, lr}<br>
> 49748- return maximum_internal_threads;<br>
> 49749-}<br>
> 49750-<br>
> 49751-RTEMS_INLINE_ROUTINE Thread_Control *_Thread_Internal_allocate( void )<br>
> 49752-{<br>
> 49753- return (Thread_Control *)<br>
> 49754: b99a: 4f17 ldr r7, [pc, #92] ; (b9f8<br>
> <_Thread_Create_idle+0x60>)<br>
> 49755- b99c: b089 sub sp, #36 ; 0x24<br>
> 49756- b99e: 4638 mov r0, r7<br>
> 49757- b9a0: f7fe ff74 bl a88c <_Objects_Allocate_unprotected><br>
> 49758- _Thread_Initialize(<br>
> 49759- &_Thread_Internal_information,<br>
> 49760: idle,<br>
> 49761- _Scheduler_Get_by_CPU( cpu ),<br>
> 49762- NULL, /* allocate the stack */<br>
> 49763: _Stack_Ensure_minimum(<br>
> rtems_configuration_get_idle_task_stack_size() ),<br>
> 49764: b9a4: 4e15 ldr r6, [pc, #84] ; (b9fc<br>
> <_Thread_Create_idle+0x64>)<br>
> 49765- *<br>
> 49766- * @return This method returns the minimum stack size;<br>
> 49767- */<br>
> 49768-RTEMS_INLINE_ROUTINE uint32_t _Stack_Minimum (void)<br>
> 49769-{<br>
> 49770- return rtems_minimum_stack_size;<br>
> 49771: b9a6: 4a16 ldr r2, [pc, #88] ; (ba00<br>
> <_Thread_Create_idle+0x68>)<br>
> 49772- b9a8: 6a73 ldr r3, [r6, #36] ; 0x24<br>
> 49773- b9aa: 6811 ldr r1, [r2, #0]<br>
> 49774- b9ac: 4605 mov r5, r0<br>
> 49775- b9ae: 428b cmp r3, r1<br>
> 49776- b9b0: bf38 it cc<br>
> 49777- b9b2: 460b movcc r3, r1<br>
> 49778- * fields not explicitly assigned were explicitly zeroed by<br>
> 49779- * _Workspace_Initialization.<br>
> 49780- */<br>
> 49781: idle = _Thread_Internal_allocate();<br>
> 49782-<br>
> 49783- _Thread_Initialize(<br>
> 49784: b9b4: 4a13 ldr r2, [pc, #76] ; (ba04<br>
> <_Thread_Create_idle+0x6c>)<br>
> 49785:static void _Thread_Create_idle_for_cpu( Per_CPU_Control *cpu )<br>
> 49786-{<br>
> 49787- Objects_Name name;<br>
> 49788: Thread_Control *idle;<br>
> 49789-<br>
> 49790- name.name_u32 = _Objects_Build_name( 'I', 'D', 'L', 'E' );<br>
> 49791: b9b6: f8df e058 ldr.w lr, [pc, #88] ; ba10<br>
> <_Thread_Create_idle+0x78><br>
> 49792- * fields not explicitly assigned were explicitly zeroed by<br>
> 49793- * _Workspace_Initialization.<br>
> 49794- */<br>
> 49795: idle = _Thread_Internal_allocate();<br>
> 49796-<br>
> 49797- _Thread_Initialize(<br>
> 49798- b9ba: 7811 ldrb r1, [r2, #0]<br>
> 49799- b9bc: 2400 movs r4, #0<br>
> 49800- b9be: 2201 movs r2, #1<br>
> 49801- b9c0: 9300 str r3, [sp, #0]<br>
> 49802- b9c2: 9102 str r1, [sp, #8]<br>
> 49803- b9c4: f8cd e01c str.w lr, [sp, #28]<br>
> 49804- b9c8: 4629 mov r1, r5<br>
> 49805- b9ca: 4623 mov r3, r4<br>
> 49806- b9cc: 9203 str r2, [sp, #12]<br>
> 49807- b9ce: 4638 mov r0, r7<br>
> 49808- b9d0: 9401 str r4, [sp, #4]<br>
> 49809- b9d2: 9404 str r4, [sp, #16]<br>
> 49810- b9d4: 9405 str r4, [sp, #20]<br>
> 49811- b9d6: 9406 str r4, [sp, #24]<br>
> 49812: b9d8: 4a0b ldr r2, [pc, #44] ; (ba08<br>
> <_Thread_Create_idle+0x70>)<br>
> 49813- b9da: f000 f96d bl bcb8 <_Thread_Initialize><br>
> 49814- * MUST be done before _Thread_Start is invoked.<br>
> 49815- */<br>
> 49816- cpu->heir =<br>
> 49817: cpu->executing = idle;<br>
> 49818-<br>
> 49819- _Thread_Start(<br>
> 49820- b9de: 6a32 ldr r2, [r6, #32]<br>
> 49821- /*<br>
> 49822- * WARNING!!! This is necessary to "kick" start the system and<br>
> 49823- * MUST be done before _Thread_Start is invoked.<br>
> 49824- */<br>
> 49825- cpu->heir =<br>
> 49826: cpu->executing = idle;<br>
> 49827: b9e0: 4e0a ldr r6, [pc, #40] ; (ba0c<br>
> <_Thread_Create_idle+0x74>)<br>
> 49828-<br>
> 49829- _Thread_Start(<br>
> 49830- b9e2: 9400 str r4, [sp, #0]<br>
> 49831- b9e4: 9601 str r6, [sp, #4]<br>
> 49832- b9e6: 4628 mov r0, r5<br>
> 49833- b9e8: 4621 mov r1, r4<br>
> 49834- b9ea: 4623 mov r3, r4<br>
> 49835- /*<br>
> 49836- * WARNING!!! This is necessary to "kick" start the system and<br>
> 49837- * MUST be done before _Thread_Start is invoked.<br>
> 49838- */<br>
> 49839- cpu->heir =<br>
> 49840: cpu->executing = idle;<br>
> 49841- b9ec: 60b5 str r5, [r6, #8]<br>
> 49842-<br>
> 49843- /*<br>
> 49844- * WARNING!!! This is necessary to "kick" start the system and<br>
> 49845- * MUST be done before _Thread_Start is invoked.<br>
> 49846- */<br>
> 49847- cpu->heir =<br>
> 49848- b9ee: 60f5 str r5, [r6, #12]<br>
> 49849: cpu->executing = idle;<br>
> 49850-<br>
> 49851- _Thread_Start(<br>
> 49852- b9f0: f000 fee0 bl c7b4 <_Thread_Start><br>
> 49853-<br>
> 49854- if ( _Per_CPU_Is_processor_started( cpu ) ) {<br>
> 49855: _Thread_Create_idle_for_cpu( cpu );<br>
> 49856- }<br>
> 49857- }<br>
> 49858-}<br>
> 49859- b9f4: b009 add sp, #36 ; 0x24<br>
> 49860- b9f6: bdf0 pop {r4, r5, r6, r7, pc}<br>
> 49861- b9f8: 200042c0 .word 0x200042c0<br>
> 49862- b9fc: 000183c0 .word 0x000183c0<br>
> 49863- ba00: 200011c0 .word 0x200011c0<br>
> 49864- ba04: 200011bc .word 0x200011bc<br>
> 49865- ba08: 0001847c .word 0x0001847c<br>
> 49866- ba0c: 20004640 .word 0x20004640<br>
> 49867- ba10: 49444c45 .word 0x49444c45<br>
> --<br>
> 54093- const Scheduler_Control *scheduler,<br>
> 54094- Thread_Control *the_thread,<br>
> 54095- Per_CPU_Control *cpu<br>
> 54096-)<br>
> 54097-{<br>
> 54098: ( *scheduler->Operations.start_idle )( scheduler, the_thread, cpu );<br>
> 54099- c7de: 4809 ldr r0, [pc, #36] ; (c804<br>
> <_Thread_Start+0x50>)<br>
> 54100- _Thread_Ready( the_thread );<br>
> 54101- } else {<br>
> 54102- const Scheduler_Control *scheduler = _Scheduler_Get_by_CPU(<br>
> cpu );<br>
> 54103-<br>
> 54104- if ( scheduler != NULL ) {<br>
> 54105- the_thread->current_state = STATES_READY;<br>
> 54106- c7e0: 2200 movs r2, #0<br>
> 54107- c7e2: 612a str r2, [r5, #16]<br>
> 54108- c7e4: 6b43 ldr r3, [r0, #52] ; 0x34<br>
> 54109- c7e6: 4629 mov r1, r5<br>
> 54110- c7e8: 9a05 ldr r2, [sp, #20]<br>
> <br>
> On Wed, Apr 24, 2019 at 2:59 PM Christian Mauderer<br>
> <<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a><br>
> <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a>>> wrote:<br>
> <br>
> Am 24.04.19 um 02:35 schrieb Jython:<br>
> > yes, I need to do low power for stm32f4<br>
> > will this line work __asm__ volatile ("wfi");?<br>
> <br>
> That line should be correct. Please note that the instruction is already<br>
> used in the armv7 idle thread:<br>
> <br>
> <a href="https://git.rtems.org/rtems/tree/cpukit/score/cpu/arm/armv7-thread-idle.c#n32" rel="noreferrer" target="_blank">https://git.rtems.org/rtems/tree/cpukit/score/cpu/arm/armv7-thread-idle.c#n32</a><br>
> <br>
> The stm32f4 is a Cortex-M4 so it's quite likely that this routine is<br>
> used. You can check by doing an "arm-rtems5-objdump -dS" on your file<br>
> and search for the idle body.<br>
> <br>
> With kind regards<br>
> <br>
> Christian<br>
> <br>
> ><br>
> ><br>
> > On Tue, Apr 23, 2019 at 10:28 PM Christian Mauderer<br>
> > <<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a><br>
> <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a>><br>
> > <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a><br>
> <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a>>>> wrote:<br>
> ><br>
> > Am 22.04.19 um 09:47 schrieb Jython:<br>
> > > HI, ALL!<br>
> > > wfi<br>
> > <br>
> <a href="http://www.keil.com/support/man/docs/armcc/armcc_chr1359125004400.htm" rel="noreferrer" target="_blank">http://www.keil.com/support/man/docs/armcc/armcc_chr1359125004400.htm</a><br>
> > > how can i call the arm __wfi?<br>
> > ><br>
> > > _______________________________________________<br>
> > > users mailing list<br>
> > > <a href="mailto:users@rtems.org" target="_blank">users@rtems.org</a> <mailto:<a href="mailto:users@rtems.org" target="_blank">users@rtems.org</a>><br>
> <mailto:<a href="mailto:users@rtems.org" target="_blank">users@rtems.org</a> <mailto:<a href="mailto:users@rtems.org" target="_blank">users@rtems.org</a>>><br>
> > > <a href="http://lists.rtems.org/mailman/listinfo/users" rel="noreferrer" target="_blank">http://lists.rtems.org/mailman/listinfo/users</a><br>
> > ><br>
> ><br>
> > Hello Jython,<br>
> ><br>
> > WFI is an assembler instruction. The Keil wrapper isn't<br>
> available in<br>
> > gcc. I know of no direct replacement. Most likely you need a<br>
> gcc inline<br>
> > assembly for that.<br>
> ><br>
> > May I ask why you would need "wfi"? If you use a operating<br>
> system, the<br>
> > system typically handles such low level stuff for you. The only<br>
> > application that springs to mind for that instruction is<br>
> overwriting the<br>
> > idle loop to save energy.<br>
> ><br>
> > Best regards<br>
> ><br>
> > Christian<br>
> ><br>
> > --<br>
> > --------------------------------------------<br>
> > embedded brains GmbH<br>
> > Herr Christian Mauderer<br>
> > Dornierstr. 4<br>
> > D-82178 Puchheim<br>
> > Germany<br>
> > email: <a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a><br>
> <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a>><br>
> > <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a><br>
> <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a>>><br>
> > Phone: +49-89-18 94 741 - 18<br>
> > Fax: +49-89-18 94 741 - 08<br>
> > PGP: Public key available on request.<br>
> ><br>
> > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne<br>
> des EHUG.<br>
> ><br>
> <br>
> -- <br>
> --------------------------------------------<br>
> embedded brains GmbH<br>
> Herr Christian Mauderer<br>
> Dornierstr. 4<br>
> D-82178 Puchheim<br>
> Germany<br>
> email: <a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a><br>
> <mailto:<a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a>><br>
> Phone: +49-89-18 94 741 - 18<br>
> Fax: +49-89-18 94 741 - 08<br>
> PGP: Public key available on request.<br>
> <br>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.<br>
> <br>
<br>
-- <br>
--------------------------------------------<br>
embedded brains GmbH<br>
Herr Christian Mauderer<br>
Dornierstr. 4<br>
D-82178 Puchheim<br>
Germany<br>
email: <a href="mailto:christian.mauderer@embedded-brains.de" target="_blank">christian.mauderer@embedded-brains.de</a><br>
Phone: +49-89-18 94 741 - 18<br>
Fax: +49-89-18 94 741 - 08<br>
PGP: Public key available on request.<br>
<br>
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.<br>
</blockquote></div>