From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <ian.campbell@citrix.com>
Cc: julien.grall@citrix.com, stefano.stabellini@eu.citrix.com,
tim@xen.org, xen-devel@lists.xen.org
Subject: Re: [PATCH RFC 5/7] xen: arm: rewrite start of day page table and cpu bring up
Date: Wed, 18 Sep 2013 18:06:21 +0100 [thread overview]
Message-ID: <5239DD8D.8090001@linaro.org> (raw)
In-Reply-To: <1379382050-11821-5-git-send-email-ian.campbell@citrix.com>
On 09/17/2013 02:40 AM, Ian Campbell wrote:
> diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S
> index b8334e2..abaacfd 100644
> --- a/xen/arch/arm/arm32/head.S
> +++ b/xen/arch/arm/arm32/head.S
> @@ -37,6 +37,25 @@
[..]
> +
> +common_start:
> + mov r7, #0 /* r13 := CPU ID */
> + mrc CP32(r1, MPIDR)
> + tst r1, #(1<<31) /* Multiprocessor extension supported? */
> + beq 1f
> + tst r1, #(1<<30) /* Uniprocessor system? */
> + bne 1f
> + bic r7, r1, #(0xff << 24) /* Mask out flags to get CPU ID */
Can you use #(~MPIDR_HWID_MASK) instead of #(0xff << 24)?
I think, it's the same in arm64/head.S.
--
Julien Grall
next prev parent reply other threads:[~2013-09-18 17:06 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-17 1:37 [PATCH RFC 0/N] xen: arm: rework early bring up Ian Campbell
2013-09-17 1:40 ` [PATCH RFC 1/7] xen: arm: Load xen under 4GB on 32-bit Ian Campbell
2013-09-18 15:44 ` Julien Grall
2013-09-19 9:21 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 2/7] xen: arm: Log the raw MIDR on boot Ian Campbell
2013-09-17 12:05 ` Julien Grall
2013-09-19 9:21 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 3/7] xen: arm: make sure we stay within the memory bank during mm setup Ian Campbell
2013-09-17 12:19 ` Julien Grall
2013-09-19 9:27 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 4/7] xen: arm: add two new device tree helpers Ian Campbell
2013-09-17 13:05 ` Julien Grall
2013-09-18 17:11 ` Julien Grall
2013-09-18 17:14 ` Ian Campbell
2013-09-17 1:40 ` [PATCH RFC 5/7] xen: arm: rewrite start of day page table and cpu bring up Ian Campbell
2013-09-17 16:18 ` Julien Grall
2013-09-17 16:36 ` Ian Campbell
2013-09-17 16:55 ` Julien Grall
2013-09-17 18:30 ` Andre Przywara
2013-09-17 19:19 ` Ian Campbell
2013-09-18 13:57 ` Julien Grall
2013-09-18 15:12 ` Ian Campbell
2013-09-18 17:06 ` Julien Grall [this message]
2013-09-18 17:14 ` Ian Campbell
2013-09-19 11:36 ` Tim Deegan
2013-09-20 17:09 ` Ian Campbell
2013-09-20 17:16 ` Ian Campbell
2013-09-19 13:36 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 6/7] xen: arm: configure TCR_EL2 for 40 bit physical address space Ian Campbell
2013-09-18 15:50 ` Julien Grall
2013-09-19 13:42 ` Tim Deegan
2013-09-17 1:40 ` [PATCH RFC 7/7] xen: arm: split cpu0's domheap mapping PTs out from xen_second Ian Campbell
2013-09-19 13:47 ` Tim Deegan
2013-09-17 11:34 ` [PATCH RFC 0/N] xen: arm: rework early bring up Julien Grall
2013-09-17 12:43 ` Ian Campbell
2013-09-18 13:40 ` Julien Grall
2013-09-18 17:33 ` Julien Grall
2013-09-18 19:22 ` Ian Campbell
2013-09-18 19:24 ` Ian Campbell
2013-09-18 20:00 ` Julien Grall
2013-09-18 20:22 ` Ian Campbell
2013-09-18 21:14 ` Julien Grall
2013-09-18 21:28 ` Ian Campbell
2013-09-19 14:49 ` Julien Grall
2013-09-19 15:51 ` Ian Campbell
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