[Bug 1897680] [NEW] memory address over 0x2000_7ffc is not accessible in mps2-an505

[Changho Choi]

Public bug reported:

I currently run qemu with the following options
`qemu-system-aarch64 -machine mps2-an505 -cpu cortex-m33 -m 16`

For some reason, memory address over 0x2000_7ffc is not accessible.
It can be tested in gdb as follow.

(gdb) x/x 0x20007ffc
0x20007ffc:     0x00000000
(gdb) x/x 0x20007ffd
0x20007ffd:     Cannot access memory at address 0x20007ffd
(gdb) x/x 0x20008000
0x20008000:     Cannot access memory at address 0x20008000

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1897680

Title:
  memory address over 0x2000_7ffc is not accessible in mps2-an505

Status in QEMU:
  New

Bug description:
  I currently run qemu with the following options
  `qemu-system-aarch64 -machine mps2-an505 -cpu cortex-m33 -m 16`

  For some reason, memory address over 0x2000_7ffc is not accessible.
  It can be tested in gdb as follow.

  (gdb) x/x 0x20007ffc
  0x20007ffc:   0x00000000
  (gdb) x/x 0x20007ffd
  0x20007ffd:   Cannot access memory at address 0x20007ffd
  (gdb) x/x 0x20008000
  0x20008000:   Cannot access memory at address 0x20008000

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