From: "Jonathan Neuschäfer" <j.neuschaefer@gmx.net>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: "Paul Mackerras" <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org,
"Jonathan Neuschäfer" <j.neuschaefer@gmx.net>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 03/13] powerpc/mm/32s: rework mmu_mapin_ram()
Date: Tue, 18 Dec 2018 04:05:38 +0100 [thread overview]
Message-ID: <20181218030538.GA24278@latitude> (raw)
In-Reply-To: <18ba3a7c-ebfa-66aa-e231-b56985d0e89a@c-s.fr>
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On Mon, Dec 17, 2018 at 10:29:18AM +0100, Christophe Leroy wrote:
> > With patches 1-3:
> > [ 0.000000] setbat(0, c0000000, 00000000, 01000000, 311)
> > [ 0.000000] setbat(2, c1000000, 01000000, 00800000, 311)
> > [ 0.000000] setbat(4, d0000000, 10000000, 02000000, 791)
>
> What we see is that BAT0 is not used in the origin. I have always wondered
> the reason, maybe there is something odd behind and BAT0 shall no ne used.
>
> Could you try and modify find_free_bat() so that it starts at b = 1 instead
> of b = 0 ?
In this case, setbat is called with index 2, 3, and 4, but the Wii still
doesn't boot.
> > According to arch/powerpc/include/asm/book3s/32/hash.h,
> > - 0x591 = _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | _PAGE_PRESENT
> > - 0x311 = _PAGE_EXEC | _PAGE_ACCESSED | _PAGE_COHERENT | _PAGE_PRESENT
> > - 0x791 = _PAGE_RW | _PAGE_EXEC | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | _PAGE_PRESENT
> >
>
> Yes, patch 1 added _PAGE_EXEC which explains this 0x200.
> Do you confirm it still works well with only patch 1 ?
Patch 1 alone boots to userspace.
Jonathan
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next prev parent reply other threads:[~2018-12-18 3:13 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-29 19:00 [PATCH v1 00/13] powerpc/32s: Use BATs for STRICT_KERNEL_RWX Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 01/13] powerpc/mm: add exec protection on powerpc 603 Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 02/13] powerpc/mm/32: add base address to mmu_mapin_ram() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 03/13] powerpc/mm/32s: rework mmu_mapin_ram() Christophe Leroy
2018-12-03 21:55 ` Jonathan Neuschäfer
2018-12-13 12:16 ` Christophe Leroy
2018-12-13 14:51 ` Christophe Leroy
2018-12-17 1:28 ` Jonathan Neuschäfer
2018-12-17 9:29 ` Christophe Leroy
2018-12-18 3:05 ` Jonathan Neuschäfer [this message]
2018-12-18 9:18 ` Christophe Leroy
2018-12-18 14:07 ` Jonathan Neuschäfer
2018-12-18 14:15 ` Christophe Leroy
2018-12-18 14:55 ` Christophe Leroy
2018-12-18 15:04 ` Christophe Leroy
2018-12-18 17:04 ` Jonathan Neuschäfer
2018-12-18 18:13 ` Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 04/13] powerpc/mm/32s: use generic mmu_mapin_ram() for all blocks Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 05/13] powerpc/wii: remove wii_mmu_mapin_mem2() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 06/13] powerpc/mm/32s: use _PAGE_EXEC in setbat() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 07/13] powerpc/mm/32s: add setibat() clearibat() and update_bats() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 08/13] powerpc/32: add helper to write into segment registers Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 09/13] powerpc/mmu: add is_strict_kernel_rwx() helper Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 10/13] powerpc/kconfig: define PAGE_SHIFT inside Kconfig Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 11/13] powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 12/13] powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 13/13] powerpc/kconfig: make _etext and data areas alignment configurable on Book3s 32 Christophe Leroy
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