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Re: [Qemu-devel] [PATCH] Add MIPS ELF loader

From: Dirk Behme
Subject: Re: [Qemu-devel] [PATCH] Add MIPS ELF loader
Date: Thu, 30 Mar 2006 15:40:25 +0200
User-agent: Mozilla Thunderbird 1.0.7 (X11/20050923)

Thiemo Seufer wrote:
On Tue, Mar 28, 2006 at 08:57:15AM +0200, Dirk Behme wrote:
What about the patch in attachment? It first tries to load
image as an ELF file. If this fails it falls back to raw
image load. Additionally, it takes feature of patch above to
go on even if no BIOS is found.

A slightly more polished version with less noisy messages is appended.
It also adjusts the ramdisk load address to physical addressing,
similiar to the binary kernel load.

One question I just found:

If we go on if no BIOS is found/executed and we load some stuff to e.g. 0x80010000, where is the default address translation made? As I understand MIPS, code in kseg0 (0x80000000) and kseg1 (0xA0000000) should be executable without MMU/TLB setup because it is mapped by default to physical 0x0. But looks to me that I get a

cpu_mips_handle_mmu_fault pc 80010000 ad 80010000 rw 2 is_user 0 smmu 1

for it.


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