From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/arm/mm/abort-ev5t.S | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 kernel/arch/arm/mm/abort-ev5t.S (limited to 'kernel/arch/arm/mm/abort-ev5t.S') diff --git a/kernel/arch/arm/mm/abort-ev5t.S b/kernel/arch/arm/mm/abort-ev5t.S new file mode 100644 index 000000000..a0908d465 --- /dev/null +++ b/kernel/arch/arm/mm/abort-ev5t.S @@ -0,0 +1,28 @@ +#include +#include +#include "abort-macro.S" +/* + * Function: v5t_early_abort + * + * Params : r2 = pt_regs + * : r4 = aborted context pc + * : r5 = aborted context psr + * + * Returns : r4 - r11, r13 preserved + * + * Purpose : obtain information about current aborted instruction. + * Note: we read user space. This means we might cause a data + * abort here if the I-TLB and D-TLB aren't seeing the same + * picture. Unfortunately, this does happen. We live with it. + */ + .align 5 +ENTRY(v5t_early_abort) + mrc p15, 0, r1, c5, c0, 0 @ get FSR + mrc p15, 0, r0, c6, c0, 0 @ get FAR + do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3 + ldreq r3, [r4] @ read aborted ARM instruction + bic r1, r1, #1 << 11 @ clear bits 11 of FSR + do_ldrd_abort tmp=ip, insn=r3 + tst r3, #1 << 20 @ check write + orreq r1, r1, #1 << 11 + b do_DataAbort -- cgit 1.2.3-korg