Hi Tom,
-----Original Message----- From: Tom Rini [mailto:trini@konsulko.com] Sent: Thursday, June 08, 2017 5:12 PM To: Vikas MANOCHA vikas.manocha@st.com Cc: Phil Edworthy phil.edworthy@renesas.com; Albert Aribaud albert.u.boot@aribaud.net; Kamil Lulko kamil.lulko@gmail.com; u-boot@lists.denx.de Subject: Re: [PATCH 1/2] arm: Add Kconfig symbols used for Linux asm compatibility
On Fri, Jun 09, 2017 at 12:07:40AM +0000, Vikas MANOCHA wrote:
Hi Albert/Tom,
-----Original Message----- From: Phil Edworthy [mailto:phil.edworthy@renesas.com] Sent: Wednesday, May 31, 2017 11:33 PM To: Albert Aribaud albert.u.boot@aribaud.net Cc: Tom Rini trini@konsulko.com; Vikas MANOCHA vikas.manocha@st.com; Kamil Lulko kamil.lulko@gmail.com; u- boot@lists.denx.de; Phil Edworthy phil.edworthy@renesas.com Subject: [PATCH 1/2] arm: Add Kconfig symbols used for Linux asm compatibility
Rather than change asm files that come from Linux, add the symbols to Kconfig. Since one of the symbols is for thumb2 builds, make CPU_V7M always select them.
Signed-off-by: Phil Edworthy phil.edworthy@renesas.com
arch/arm/Kconfig | 10 ++++++++++ arch/arm/lib/Makefile | 2 -- 2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 2a3a36e..2793651 100644 --- a/arch/arm/Kconfigl +++ b/arch/arm/Kconfig @@ -19,6 +19,15 @@ config HAS_VBAR config HAS_THUMB2 bool
+# Used for compatibility with asm files copied from the kernel +config ARM_ASM_UNIFIED
- bool
- default y
Is every arm arch (arm720, arm926 etc) assembly code written for unified ? Otherwise we might have run-time side effects.
I could be missing something, but this is only used by <asm/assembler.h> and in turn only by arch/arm/lib/*.S, where we already had been defining this.
Yes, you are right. I was under the impression that asm/assembler.h is being used by all arm archs everywhere like startup code, cache mgt etc.
Cheers, Vikas
-- Tom