From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm: pj4: check cpu id for pj4 cp0 access
Date: Fri, 14 Jun 2013 09:47:32 +0100 [thread overview]
Message-ID: <20130614084732.GL18614@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1371199336-28027-1-git-send-email-chao.xie@marvell.com>
On Fri, Jun 14, 2013 at 04:42:16AM -0400, Chao Xie wrote:
> @@ -79,6 +82,15 @@ static void __init pj4_cp_access_write(u32 value)
> static int __init pj4_cp0_init(void)
> {
> u32 cp_access;
> + u32 cpuid;
> +
> + __asm__ __volatile__ (
> + "mrc p15, 0, %0, c0, c0\n\t"
> + : "=r" (cpuid));
> +
> + /* If it is not a pj4 core, skip it. */
> + if ((cpuid & CORE_PJ4_MASK) != CORE_PJ4_ID)
> + return 0;
We have a macro for reading the CPU ID, see asm/cputype.h
prev parent reply other threads:[~2013-06-14 8:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-14 8:42 [PATCH] arm: pj4: check cpu id for pj4 cp0 access Chao Xie
2013-06-14 8:47 ` Russell King - ARM Linux [this message]
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