Improved version showing how writing to 0xE000EF70 DCCIMVAC (Data cache clean and invalidate by address to the PoC=Point of Coherency) makes the correct data accessible

trace1.txt

GNU gdb (GNU Tools for ARM Embedded Processors 6-2017-q2-update) 7.12.1.20170417-git
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Reading symbols from Debug/FokliftController.elf...done.
MX_GPIO_Init () at ../Src/main.c:476
476	  GPIO_InitStruct.Pull = GPIO_NOPULL;
Target voltage: 3.3V
Available Targets:
No. Att Driver
 1      STM32F7xx
A program is being debugged already.  Kill it? (y or n) [answered Y; input not from terminal]
MX_GPIO_Init () at ../Src/main.c:476
476	  GPIO_InitStruct.Pull = GPIO_NOPULL;
7BB37DAD:05:85
(gdb) load
Loading section .isr_vector, size 0x1f8 lma 0x8000000
Loading section .text, size 0xa374 lma 0x8000200
Loading section .rodata, size 0x884 lma 0x800a574
Loading section .ARM, size 0x8 lma 0x800adf8
Loading section .init_array, size 0x4 lma 0x800ae00
Loading section .fini_array, size 0x4 lma 0x800ae04
Loading section .data, size 0x12c lma 0x800ae08
Start address 0x8000620, load size 44844
Transfer rate: 18 KB/sec, 862 bytes/write.
(gdb) break StartDefaultTask
Breakpoint 1 at 0x8002210: file ../Src/main.c, line 491.
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /home/nick/burtek/FokliftController/Debug/FokliftController.elf 
Note: automatically using hardware breakpoints for read-only addresses.

Breakpoint 1, StartDefaultTask (argument=0x0) at ../Src/main.c:491
491		InitGraphics(&hltdc);
(gdb) step
InitGraphics (pNewLCD=0x0) at ../Src/Graphics/graphics.c:141
141		pLCD = pNewLCD;
(gdb) p/x &pNewLCD
$1 = 0x2002be84
(gdb) p/x {int}0x2002be84
$2 = 0x0
(gdb) set {int}0xe000ef70 = 0x2002be84
(gdb) p/x {int}0x2002be84
$3 = 0x2002fa04
(gdb) quit
A debugging session is active.

	Inferior 1 [Remote target] will be killed.

Quit anyway? (y or n) y