From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
To: Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
Russell King - ARM Linux
<linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH V3 1/5] ARM: implement debug_ll_io_init()
Date: Mon, 05 Nov 2012 12:03:57 -0700 [thread overview]
Message-ID: <50980D9D.7050207@wwwdotorg.org> (raw)
In-Reply-To: <1350686507-3022-1-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
On 10/19/2012 04:41 PM, Stephen Warren wrote:
> When using DEBUG_LL, the UART's (or other HW's) registers are mapped
> into early page tables based on the results of assembly macro addruart.
> Later, when the page tables are replaced, the same virtual address must
> remain valid. Historically, this has been ensured by using defines from
> <mach/iomap.h> in both the implementation of addruart, and the machine's
> .map_io() function. However, with the move to single zImage, we wish to
> remove <mach/iomap.h>. To enable this, the macro addruart may be used
> when constructing the late page tables too; addruart is exposed as a
> C function debug_ll_addr(), and used to set up the required mapping in
> debug_ll_io_init(), which may called on an opt-in basis from a machine's
> .map_io() function.
Patch 1 has been taken into arm-soc, and I've applied patches 2-5 to the
Tegra tree.
WARNING: multiple messages have this Message-ID (diff)
From: swarren@wwwdotorg.org (Stephen Warren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V3 1/5] ARM: implement debug_ll_io_init()
Date: Mon, 05 Nov 2012 12:03:57 -0700 [thread overview]
Message-ID: <50980D9D.7050207@wwwdotorg.org> (raw)
In-Reply-To: <1350686507-3022-1-git-send-email-swarren@wwwdotorg.org>
On 10/19/2012 04:41 PM, Stephen Warren wrote:
> When using DEBUG_LL, the UART's (or other HW's) registers are mapped
> into early page tables based on the results of assembly macro addruart.
> Later, when the page tables are replaced, the same virtual address must
> remain valid. Historically, this has been ensured by using defines from
> <mach/iomap.h> in both the implementation of addruart, and the machine's
> .map_io() function. However, with the move to single zImage, we wish to
> remove <mach/iomap.h>. To enable this, the macro addruart may be used
> when constructing the late page tables too; addruart is exposed as a
> C function debug_ll_addr(), and used to set up the required mapping in
> debug_ll_io_init(), which may called on an opt-in basis from a machine's
> .map_io() function.
Patch 1 has been taken into arm-soc, and I've applied patches 2-5 to the
Tegra tree.
next prev parent reply other threads:[~2012-11-05 19:03 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-19 22:41 [PATCH V3 1/5] ARM: implement debug_ll_io_init() Stephen Warren
2012-10-19 22:41 ` Stephen Warren
[not found] ` <1350686507-3022-1-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-10-19 22:41 ` [PATCH V3 2/5] ARM: tegra: simplify DEBUG_LL UART selection options Stephen Warren
2012-10-19 22:41 ` Stephen Warren
2012-10-19 22:41 ` [PATCH V3 3/5] ARM: tegra: decouple uncompress.h and debug-macro.S Stephen Warren
2012-10-19 22:41 ` Stephen Warren
[not found] ` <1350686507-3022-3-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-10-22 8:18 ` Peter De Schrijver
2012-10-22 8:18 ` Peter De Schrijver
[not found] ` <20121022081830.GH3196-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2012-10-22 16:24 ` Stephen Warren
2012-10-22 16:24 ` Stephen Warren
[not found] ` <50857340.4010403-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-10-22 22:13 ` Russell King - ARM Linux
2012-10-22 22:13 ` Russell King - ARM Linux
2012-10-19 22:41 ` [PATCH V3 4/5] ARM: tegra: don't include iomap.h from debug-macro.S Stephen Warren
2012-10-19 22:41 ` Stephen Warren
2012-10-19 22:41 ` [PATCH V3 5/5] ARM: tegra: move debug-macro.S to include/debug Stephen Warren
2012-10-19 22:41 ` Stephen Warren
2012-10-20 13:36 ` [PATCH V3 1/5] ARM: implement debug_ll_io_init() Rob Herring
2012-10-20 13:36 ` Rob Herring
2012-11-05 19:03 ` Stephen Warren [this message]
2012-11-05 19:03 ` Stephen Warren
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