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Message-Id: <1421869698-27341-2-git-send-email-sboyd@codeaurora.org> Date: Wed, 21 Jan 2015 11:48:17 -0800 From: Stephen Boyd <sboyd@...eaurora.org> To: Russell King <linux@....linux.org.uk> Cc: linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Kumar Gala <galak@...eaurora.org> Subject: [PATCH 1/2] ARM: Add a secondary_startup that assumes ARM mode Some platforms always enter the kernel in ARM mode even if the kernel is compiled for THUMB2. Add a small wrapper on top of secondary_startup() that switches into THUMB2 mode. Signed-off-by: Stephen Boyd <sboyd@...eaurora.org> --- arch/arm/kernel/head.S | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 664eee8c4a26..22bb6d54e90d 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -346,6 +346,12 @@ __turn_mmu_on_loc: #if defined(CONFIG_SMP) .text +ENTRY(secondary_startup_arm) + .arm + THUMB( adr r9, BSYM(1f) ) @ Kernel is entered in ARM. + THUMB( bx r9 ) @ If this is a Thumb-2 kernel, + THUMB( .thumb ) @ switch to Thumb now. + THUMB(1: ) ENTRY(secondary_startup) /* * Common entry point for secondary CPUs. @@ -385,6 +391,7 @@ ENTRY(secondary_startup) THUMB( add r12, r10, #PROCINFO_INITFUNC ) THUMB( ret r12 ) ENDPROC(secondary_startup) +ENDPROC(secondary_startup_arm) /* * r6 = &secondary_data -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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