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[Qemu-devel] softmmu macro meaning


From: Clemens Kolbitsch
Subject: [Qemu-devel] softmmu macro meaning
Date: Thu, 27 Sep 2007 10:39:46 +0200
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hi guys!
just a short question:

in softmmu_header.h, for example in function 

glue(glue(ld, USUFFIX), MEMSUFFIX)(target_ulong ptr)

which boils down to be included in (e.g.)

op_ldl_kernel_T0_A0
or
op_ldub_user_T0_A0
or
...

does the MEMSUFFIX macro ("kernel" / "user") mean that the memory is access by 
code running in ring0/ring3 or does this tell about the memory region being 
access (mem < or > TASK_SIZE / 0xc0000000)?


and while I'm asking two other related questions I just don't quite 
understand:

1.) why does the TLB (e.g. tlb_table[CPU_MEM_INDEX][...]) have 2 different 
arrays? is this because some CPU offer different page sizes depending on a 
TASK_SIZE border or something??

2.) the MMUSUFFIX macro ("mmu" / "cmmu") what does this stand for??

Thanks!!!
Clemens




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