[OpenBIOS] Haiku/ppc regression?

[Andreas Färber]

Am 26.12.2009 um 23:24 schrieb Andreas Färber:

>
> Am 22.12.2009 um 22:48 schrieb Andreas Färber:
>
>> checking for memory...
>> 0: base = 0x00000000, size = 134217728
>> 1: empty region
>> total physical memory = 128 MB
>> suggested page table size = 1048576
>> need new page table, size = 1048576!
>> new table at: 0x07f00000
>
> This hang here can be reproduced by the following 1-byte memset  
> (given -m 128). The commented-out memset does not trigger it.

For comparison, my PowerMac G3 b&w (NewWorld) allocated that table at  
0x00400000.

> Does the address ring a bell for anyone?
> The address of env->nip appears to be 0x4703dec, so no obvious  
> connection between the two.
>
> Andreas
>
> diff --git a/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp  
> b/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp
> index 262e2c1..7af7247 100644
> --- a/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp
> +++ b/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp
> @@ -909,7 +909,8 @@ arch_mmu_init(void)
>
> 	sPageTableHashMask = tableSize / sizeof(page_table_entry_group) - 1;
> 	if (sPageTable != oldTable)
> -		memset(sPageTable, 0, tableSize);
> +		//memset(sPageTable, 0, 9308 /*tableSize*/);
> +		memset((void*)0x7F0245c, 0, 1);
>
> 	// turn off address translation via the page table/segment mechanism,
> 	// identity map the first 256 MB (where our code/data reside)
>
>
> -- 
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