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Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging

From: Andreas Färber
Subject: Re: [Qemu-devel] [PATCH v3 5/6] vga: Use linear mapping + dirty logging in chain 4 memory access mode
Date: Tue, 13 Sep 2011 10:19:52 +0200 
Am 13.09.2011 um 10:14 schrieb Jan Kiszka:


On 2011-09-13 09:39, Alexander Graf wrote:

(qemu) device_show #3
dev: VGA, id "#3", version 2
 dev.
   version_id:         00000002
config: 00 00 00 00 10 d1 cf 20 - 00 00 00 00 10 d1 d0 30 
                       ...
irq_state: 00 00 00 00 00 00 00 10 - 00 00 00 00 00 00 00 00 
 vga.
   latch:              00000000
   sr_index:           00
   sr:                 00 00 0f 00 08 00 00 00
   gr_index:           00
gr: 00 00 00 00 00 40 05 00 - 00 00 00 00 00 00 00 00 
   ar_index:           20
ar: 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 
                       ...
   ar_flip_flop:       00000001
   cr_index:           00
cr: 00 63 00 00 00 00 00 50 - 00 40 00 00 00 00 00 00 
                       ...
   msr:                00
   fcr:                00
   st00:               00
   st01:               00
   dac_state:          00
   dac_sub_index:      00
   dac_read_index:     00
   dac_write_index:    10
   dac_cache:          3f 3f 3f
palette: 00 00 00 00 00 2a 00 2a - 00 00 2a 2a 2a 00 00 2a 
                       ...
   bank_offset:        00000000
   is_vbe_vmstate:     01
   vbe_index:          0004
   vbe_regs[00]:       b0c5
   vbe_regs[01]:       0320
   vbe_regs[02]:       0258
   vbe_regs[03]:       000f
   vbe_regs[04]:       0001
   vbe_regs[05]:       0000
   vbe_regs[06]:       0320
   vbe_regs[07]:       0258
   vbe_regs[08]:       0000
   vbe_regs[09]:       0000
   vbe_start_addr:     00000000
   vbe_line_offset:    00000640
   vbe_bank_mask:      0000007f



Makes no sense, must work with this setup. Maybe it's dynamic effect
when switching modes of bank offsets. Do you have some test image for me?
I've been using a Debian netinst image, but businesscard should do as well: 
http://cdimage.debian.org/debian-cd/6.0.2.1/powerpc/iso-cd/debian-6.0.2.1-powerpc-businesscard.iso
qemu-system-ppc -boot d -cdrom path/to.iso # at yaboot prompt type: install
Then in addition to the black bar in Alex' image, the penguin gets beheaded. 

Andreas
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