[Bug 88868] PowerPC e5500, kernel crash, GT520, GT610

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=88868

--- Comment #21 from Dmitriy <oboturoff-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
for example some debug in function "nouveau_bios_shadow_pramin" in kernel
3.18.5:

    if (device->card_type >= NV_50) {
        if (device->card_type >= NV_C0 && device->card_type < GM100) {
            printk ("%s(%d)\n",__FUNCTION__,__LINE__);
            if (nv_rd32(bios, 0x022500) & 0x00000001)
                return;
        } else
        if (device->card_type >= GM100) {
            printk ("##%s(%d)\n",__FUNCTION__,__LINE__);
            if (nv_rd32(bios, 0x021c04) & 0x00000001)
                return;
        }

        addr = nv_rd32(bios, 0x619f04);
        printk ("addr0=%x\n",addr);

               .....

        bar0 = nv_mask(bios, 0x001700, 0xffffffff, addr >> 16);
        printk ("bar0=%x\n",bar0);

log from x86_64:
[    0.279595] [drm] Initialized drm 1.1.0 20060810
[    0.280027] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0d90a0a1
[    0.280196] nouveau  [  DEVICE][0000:01:00.0] Chipset: GF119 (NVD9)
[    0.280361] nouveau  [  DEVICE][0000:01:00.0] Family : NVC0
[    0.280533] nouveau  [   VBIOS][0000:01:00.0] checking PRAMIN for image...
[    0.280723] nouveau_bios_shadow_pramin(94)
[    0.280881] addr=3ffe09
[    0.281032] bar0=3ff0
[    0.358740] nouveau  [   VBIOS][0000:01:00.0] ... appears to be valid
[    0.358913] nouveau  [   VBIOS][0000:01:00.0] using image from PRAMIN
[    0.359161] nouveau  [   VBIOS][0000:01:00.0] BIT signature found
[    0.359333] nouveau  [   VBIOS][0000:01:00.0] version 75.19.55.00.02
[    0.359705] nouveau 0000:01:00.0: irq 25 for MSI/MSI-X
[    0.359712] nouveau  [     PMC][0000:01:00.0] MSI interrupts enabled
[    0.359974] nouveau W[     PFB][0000:01:00.0][0x00000000][ffff88021385e800]
reclocking of this ram type unsupported
[    0.360322] nouveau  [     PFB][0000:01:00.0] RAM type: DDR3
[    0.360542] nouveau  [     PFB][0000:01:00.0] RAM size: 1024 MiB
[    0.360794] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
[    0.362663] nouveau  [    VOLT][0000:01:00.0] GPU voltage: 900000uv
[    0.412297] nouveau  [  PTHERM][0000:01:00.0] FAN control: PWM
[    0.412543] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
[    0.412822] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
[    0.413119] nouveau  [     CLK][0000:01:00.0] 07: core 270 MHz memory 405
MHz
[    0.413454] nouveau  [     CLK][0000:01:00.0] 0f: core 810 MHz memory 500
MHz
[    0.413951] nouveau  [     CLK][0000:01:00.0] --: core 270 MHz memory 405
MHz



log from powerpc e5500 64bit:
[drm] Initialized drm 1.1.0 20060810
nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x0d90a0a1
nouveau  [  DEVICE][0000:01:00.0] Chipset: GF119 (NVD9)
nouveau  [  DEVICE][0000:01:00.0] Family : NVC0
nouveau  [   VBIOS][0000:01:00.0] checking OpenFirmware for image...
nouveau  [   VBIOS][0000:01:00.0] Unable to get the OF node
nouveau  [   VBIOS][0000:01:00.0] ... signature not found
nouveau  [   VBIOS][0000:01:00.0] checking PRAMIN for image...
nouveau_bios_shadow_pramin(94)
addr0=1
nouveau  [   VBIOS][0000:01:00.0] ... signature not found
nouveau  [   VBIOS][0000:01:00.0] checking PROM for image...
nouveau  [   VBIOS][0000:01:00.0] ... appears to be valid
nouveau  [   VBIOS][0000:01:00.0] using image from PROM
nouveau  [   VBIOS][0000:01:00.0] BIT signature found
nouveau  [   VBIOS][0000:01:00.0] version 75.19.55.00.02
nouveau  [ DEVINIT][0000:01:00.0] adaptor not initialised
nouveau  [   VBIOS][0000:01:00.0] running init tables
nouveau  [     PMC][0000:01:00.0] MSI interrupts enabled
nouveau W[     PFB][0000:01:00.0][0x00000000][c0000001fe53c000] reclocking of
this ram type unsupported
nouveau  [     PFB][0000:01:00.0] RAM type: DDR3
nouveau  [     PFB][0000:01:00.0] RAM size: 1024 MiB
nouveau  [     PFB][0000:01:00.0]    ZCOMP: 0 tags
nouveau  [    VOLT][0000:01:00.0] GPU voltage: 900000uv
nouveau  [  PTHERM][0000:01:00.0] FAN control: PWM
nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes
nouveau  [     CLK][0000:01:00.0] 07: core 270 MHz memory 405 MHz 
nouveau  [     CLK][0000:01:00.0] 0f: core 810 MHz memory 500 MHz 
nouveau  [     CLK][0000:01:00.0] --: core 270 MHz memory 405 MHz 


result of operation:
addr = nv_rd32(bios, 0x619f04);

for x86: addr=3ffe09
for ppc: addr0=1

Why do the results of reading operation differ from each other?

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