From: Konstantin Khlebnikov Date: Fri, 25 Jul 2014 08:16:28 +0000 (+0100) Subject: ARM: 8114/1: LPAE: load upper bits of early TTBR0/TTBR1 X-Git-Tag: firefly_0821_release~176^2~3429^2~2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7fb00c2fca4b6c58be521eb3676cf4b4ba8dde3b;p=firefly-linux-kernel-4.4.55.git ARM: 8114/1: LPAE: load upper bits of early TTBR0/TTBR1 This patch fixes booting when idmap pgd lays above 4gb. Commit 4756dcbfd37 mostly had fixed this, but it'd failed to load upper bits. Also this fixes adding TTBR1_OFFSET to TTRR1: if lower part overflows carry flag must be added to the upper part. Signed-off-by: Konstantin Khlebnikov Signed-off-by: Russell King --- diff --git a/arch/arm/mm/proc-v7-3level.S b/arch/arm/mm/proc-v7-3level.S index e4c8acfc1323..1a24e9232ec8 100644 --- a/arch/arm/mm/proc-v7-3level.S +++ b/arch/arm/mm/proc-v7-3level.S @@ -146,12 +146,11 @@ ENDPROC(cpu_v7_set_pte_ext) mov \tmp, \ttbr1, lsr #(32 - ARCH_PGD_SHIFT) @ upper bits mov \ttbr1, \ttbr1, lsl #ARCH_PGD_SHIFT @ lower bits addls \ttbr1, \ttbr1, #TTBR1_OFFSET - mcrr p15, 1, \ttbr1, \zero, c2 @ load TTBR1 + adcls \tmp, \tmp, #0 + mcrr p15, 1, \ttbr1, \tmp, c2 @ load TTBR1 mov \tmp, \ttbr0, lsr #(32 - ARCH_PGD_SHIFT) @ upper bits mov \ttbr0, \ttbr0, lsl #ARCH_PGD_SHIFT @ lower bits - mcrr p15, 0, \ttbr0, \zero, c2 @ load TTBR0 - mcrr p15, 1, \ttbr1, \zero, c2 @ load TTBR1 - mcrr p15, 0, \ttbr0, \zero, c2 @ load TTBR0 + mcrr p15, 0, \ttbr0, \tmp, c2 @ load TTBR0 .endm /*