CM_CTRL always reads as 0x00000000 (arm/integratorcp)

[Steven G. Messervey]

qemu -version: QEMU PC emulator version 0.12.5, Copyright (c) 2003-2008 Fabrice Bellard

uname -a: Linux zenwalk 2.6.37.4 #1 SMP PREEMPT Fri Mar 18 18:17:50 CET 2011 i686 Intel(R) Pentium(R) Dual CPU T2330 @ 1.60GHz GenuineIntel GNU/Linux

command-line: qemu-system-arm -M integratorcp -cpu arm926 -m 16 -kernel mykernel.elf -serial stdio

steps to reproduce:
--------------8<------------------------
@ assembler
@ after trivial set up for arm
read_ccmr:
  ld r4,=0x10000000
  ld r0,[r4,#0x0C]
------------------>8--------------------

---------------8<------------------------
; in C
int main(void) {
  unsigned int volatile *ccmr,test1,test2,value;
  ccmr = (unsigned int volatile *)0x1000000C;
  test1 = (*ccmr); // reads as zero
  (printk, printf,etc....)
  value = 0x00000001; // set GREEN LED
  (*ccmr) = value; // should set bit 0 in CM_CTL
  test2 = (*ccmr); // should return 1!
  if (test1 == test2) {
    // printk.printf,etc
    // if test2 == 1, this code
    // is not reached
  }
}
------------------------------>8-----------------

[Peter Maydell (pmaydell)]

On 13 November 2011 15:51, Steven G. Messervey
<email address hidden> wrote:

> qemu -version: QEMU PC emulator version 0.12.5, Copyright (c) 2003-2008
> Fabrice Bellard

This is an ancient version of QEMU which there is very little point
reporting bugs against. That said, I think this bug is fixed by commit
df3f457b which will be in the 1.0 release of QEMU (due out shortly).

-- PMM

[Peter Maydell (pmaydell)]

1.0 is out now, so let's call this bug fixed.