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-rwxr-xr-x[-rw-r--r--]ports/cortex_m7/gnu/CMakeLists.txt0
-rw-r--r--ports/cortex_m7/gnu/readme_threadx.txt92
-rw-r--r--[-rwxr-xr-x]ports/cortex_m7/gnu/src/tx_thread_context_restore.S0
-rw-r--r--[-rwxr-xr-x]ports/cortex_m7/gnu/src/tx_thread_context_save.S0
-rw-r--r--[-rwxr-xr-x]ports/cortex_m7/gnu/src/tx_thread_interrupt_control.S0
-rw-r--r--[-rwxr-xr-x]ports/cortex_m7/gnu/src/tx_thread_schedule.S29
-rw-r--r--[-rwxr-xr-x]ports/cortex_m7/gnu/src/tx_thread_stack_build.S0
-rw-r--r--[-rwxr-xr-x]ports/cortex_m7/gnu/src/tx_thread_system_return.S0
-rw-r--r--[-rwxr-xr-x]ports/cortex_m7/gnu/src/tx_timer_interrupt.S0
9 files changed, 100 insertions, 21 deletions
diff --git a/ports/cortex_m7/gnu/CMakeLists.txt b/ports/cortex_m7/gnu/CMakeLists.txt
index 6a8d5852..6a8d5852 100644..100755
--- a/ports/cortex_m7/gnu/CMakeLists.txt
+++ b/ports/cortex_m7/gnu/CMakeLists.txt
diff --git a/ports/cortex_m7/gnu/readme_threadx.txt b/ports/cortex_m7/gnu/readme_threadx.txt
index 04a541cd..cdc66a3e 100644
--- a/ports/cortex_m7/gnu/readme_threadx.txt
+++ b/ports/cortex_m7/gnu/readme_threadx.txt
@@ -52,24 +52,82 @@ ThreadX. The top of the suspended thread's stack is pointed to by
tx_thread_stack_ptr in the associated thread control block TX_THREAD.
- Stack Offset Stack Contents
+Non-FPU Stack Frame:
- 0x00 r4
- 0x04 r5
- 0x08 r6
- 0x0C r7
- 0x10 r8
- 0x14 r9
- 0x18 r10
- 0x1C r11
- 0x20 r0 (Hardware stack starts here!!)
- 0x24 r1
- 0x28 r2
- 0x2C r3
- 0x30 r12
- 0x34 lr
- 0x38 pc
- 0x3C xPSR
+ Stack Offset Stack Contents
+
+ 0x00 LR Interrupted LR (LR at time of PENDSV)
+ 0x04 r4 Software stacked GP registers
+ 0x08 r5
+ 0x0C r6
+ 0x10 r7
+ 0x14 r8
+ 0x18 r9
+ 0x1C r10
+ 0x20 r11
+ 0x24 r0 Hardware stacked registers
+ 0x28 r1
+ 0x2C r2
+ 0x30 r3
+ 0x34 r12
+ 0x38 lr
+ 0x3C pc
+ 0x40 xPSR
+
+FPU Stack Frame (only interrupted thread with FPU enabled):
+
+ Stack Offset Stack Contents
+
+ 0x00 LR Interrupted LR (LR at time of PENDSV)
+ 0x04 s16 Software stacked FPU registers
+ 0x08 s17
+ 0x0C s18
+ 0x10 s19
+ 0x14 s20
+ 0x18 s21
+ 0x1C s22
+ 0x20 s23
+ 0x24 s24
+ 0x28 s25
+ 0x2C s26
+ 0x30 s27
+ 0x34 s28
+ 0x38 s29
+ 0x3C s30
+ 0x40 s31
+ 0x44 r4 Software stacked registers
+ 0x48 r5
+ 0x4C r6
+ 0x50 r7
+ 0x54 r8
+ 0x58 r9
+ 0x5C r10
+ 0x60 r11
+ 0x64 r0 Hardware stacked registers
+ 0x68 r1
+ 0x6C r2
+ 0x70 r3
+ 0x74 r12
+ 0x78 lr
+ 0x7C pc
+ 0x80 xPSR
+ 0x84 s0 Hardware stacked FPU registers
+ 0x88 s1
+ 0x8C s2
+ 0x90 s3
+ 0x94 s4
+ 0x98 s5
+ 0x9C s6
+ 0xA0 s7
+ 0xA4 s8
+ 0xA8 s9
+ 0xAC s10
+ 0xB0 s11
+ 0xB4 s12
+ 0xB8 s13
+ 0xBC s14
+ 0xC0 s15
+ 0xC4 fpscr
5. Improving Performance
diff --git a/ports/cortex_m7/gnu/src/tx_thread_context_restore.S b/ports/cortex_m7/gnu/src/tx_thread_context_restore.S
index 2cc089dd..2cc089dd 100755..100644
--- a/ports/cortex_m7/gnu/src/tx_thread_context_restore.S
+++ b/ports/cortex_m7/gnu/src/tx_thread_context_restore.S
diff --git a/ports/cortex_m7/gnu/src/tx_thread_context_save.S b/ports/cortex_m7/gnu/src/tx_thread_context_save.S
index 98330daa..98330daa 100755..100644
--- a/ports/cortex_m7/gnu/src/tx_thread_context_save.S
+++ b/ports/cortex_m7/gnu/src/tx_thread_context_save.S
diff --git a/ports/cortex_m7/gnu/src/tx_thread_interrupt_control.S b/ports/cortex_m7/gnu/src/tx_thread_interrupt_control.S
index ba269498..ba269498 100755..100644
--- a/ports/cortex_m7/gnu/src/tx_thread_interrupt_control.S
+++ b/ports/cortex_m7/gnu/src/tx_thread_interrupt_control.S
diff --git a/ports/cortex_m7/gnu/src/tx_thread_schedule.S b/ports/cortex_m7/gnu/src/tx_thread_schedule.S
index 4dd2ae83..83363d36 100755..100644
--- a/ports/cortex_m7/gnu/src/tx_thread_schedule.S
+++ b/ports/cortex_m7/gnu/src/tx_thread_schedule.S
@@ -27,6 +27,10 @@
.global _tx_thread_system_stack_ptr
.global _tx_execution_thread_enter
.global _tx_execution_thread_exit
+#ifdef TX_LOW_POWER
+ .global tx_low_power_enter
+ .global tx_low_power_exit
+#endif
@
@
.text
@@ -37,7 +41,7 @@
@/* FUNCTION RELEASE */
@/* */
@/* _tx_thread_schedule Cortex-M7/GNU */
-@/* 6.1 */
+@/* 6.1.5 */
@/* AUTHOR */
@/* */
@/* William E. Lamie, Microsoft Corporation */
@@ -70,9 +74,12 @@
@/* */
@/* DATE NAME DESCRIPTION */
@/* */
-@/* 05-19-2020 William E. Lamie Initial Version 6.0 */
-@/* 09-30-2020 William E. Lamie Modified comment(s), */
-@/* resulting in version 6.1 */
+@/* 05-19-2020 William E. Lamie Initial Version 6.0 */
+@/* 09-30-2020 William E. Lamie Modified comment(s), */
+@/* resulting in version 6.1 */
+@/* 03-02-2021 Scott Larson Modified comment(s), add */
+@/* low power code, */
+@/* resulting in version 6.1.5 */
@/* */
@/**************************************************************************/
@VOID _tx_thread_schedule(VOID)
@@ -241,11 +248,25 @@ __tx_ts_wait:
LDR r1, [r2] @ Pickup the next thread to execute pointer
STR r1, [r0] @ Store it in the current pointer
CBNZ r1, __tx_ts_ready @ If non-NULL, a new thread is ready!
+
+#ifdef TX_LOW_POWER
+ PUSH {r0-r3}
+ BL tx_low_power_enter @ Possibly enter low power mode
+ POP {r0-r3}
+#endif
+
#ifdef TX_ENABLE_WFI
DSB @ Ensure no outstanding memory transactions
WFI @ Wait for interrupt
ISB @ Ensure pipeline is flushed
#endif
+
+#ifdef TX_LOW_POWER
+ PUSH {r0-r3}
+ BL tx_low_power_exit @ Exit low power mode
+ POP {r0-r3}
+#endif
+
CPSIE i @ Enable interrupts
B __tx_ts_wait @ Loop to continue waiting
@
diff --git a/ports/cortex_m7/gnu/src/tx_thread_stack_build.S b/ports/cortex_m7/gnu/src/tx_thread_stack_build.S
index a163ab91..a163ab91 100755..100644
--- a/ports/cortex_m7/gnu/src/tx_thread_stack_build.S
+++ b/ports/cortex_m7/gnu/src/tx_thread_stack_build.S
diff --git a/ports/cortex_m7/gnu/src/tx_thread_system_return.S b/ports/cortex_m7/gnu/src/tx_thread_system_return.S
index 965f4482..965f4482 100755..100644
--- a/ports/cortex_m7/gnu/src/tx_thread_system_return.S
+++ b/ports/cortex_m7/gnu/src/tx_thread_system_return.S
diff --git a/ports/cortex_m7/gnu/src/tx_timer_interrupt.S b/ports/cortex_m7/gnu/src/tx_timer_interrupt.S
index 5e1a1570..5e1a1570 100755..100644
--- a/ports/cortex_m7/gnu/src/tx_timer_interrupt.S
+++ b/ports/cortex_m7/gnu/src/tx_timer_interrupt.S
generated by cgit v1.3.1 (git 2.54.0) at 2026-08-31 05:28:44 +0000