From: ard.biesheuvel@linaro.org (Ard Biesheuvel)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 03/10] arm64: add macros to emit little endian ASM constants
Date: Mon, 21 Jul 2014 17:16:18 +0200 [thread overview]
Message-ID: <1405955785-13477-4-git-send-email-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <1405955785-13477-1-git-send-email-ard.biesheuvel@linaro.org>
The Image header contains many constants that should be emitted in little
endian regardless of the endianness of the kernel. Add helper macros le16,
le32 and le64 to <asm/assembler.h> to aid with this.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/arm64/include/asm/assembler.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 5901480bfdca..7db7c946f73f 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -155,3 +155,21 @@ lr .req x30 // link register
#endif
orr \rd, \lbits, \hbits, lsl #32
.endm
+
+ /*
+ * Define LE constants
+ */
+ .macro le16, x
+ .byte \x & 0xff
+ .byte (\x >> 8) & 0xff
+ .endm
+
+ .macro le32, x
+ le16 \x
+ le16 \x >> 16
+ .endm
+
+ .macro le64, x
+ le32 \x
+ le32 \x >> 32
+ .endm
--
1.8.3.2
next prev parent reply other threads:[~2014-07-21 15:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-21 15:16 [RFC PATCH 00/10] arm64: boot BE kernels from UEFI Ard Biesheuvel
2014-07-21 15:16 ` [RFC PATCH 01/10] arm64/efi: efistub: jump to 'stext' directly, not through the header Ard Biesheuvel
2014-07-21 15:16 ` [RFC PATCH 02/10] arm64/efi: efistub: cover entire static mem footprint in PE/COFF .text Ard Biesheuvel
2014-07-21 15:16 ` Ard Biesheuvel [this message]
2014-07-21 15:16 ` [RFC PATCH 04/10] arm64: add EFI little endian constants to linker script Ard Biesheuvel
2014-07-30 14:18 ` Matt Fleming
2014-07-30 14:21 ` Ard Biesheuvel
2014-07-30 14:22 ` Will Deacon
2014-07-21 15:16 ` [RFC PATCH 05/10] arm64/efi: update the PE/COFF header to be endian agnostic Ard Biesheuvel
2014-07-21 15:16 ` [RFC PATCH 06/10] arm64/efi: efistub: avoid using linker defined constants Ard Biesheuvel
2014-07-21 15:16 ` [RFC PATCH 07/10] arm64/efi: efistub: add support for booting a BE kernel Ard Biesheuvel
2014-07-21 15:16 ` [RFC PATCH 08/10] arm64/efi: use LE accessors to access UEFI data Ard Biesheuvel
2014-07-21 15:16 ` [RFC PATCH 09/10] arm64/efi: enable minimal UEFI Runtime Services for big endian Ard Biesheuvel
2014-07-23 9:34 ` Mark Rutland
2014-07-23 10:59 ` Ard Biesheuvel
2014-07-23 17:52 ` Ard Biesheuvel
2014-07-21 15:16 ` [RFC PATCH 10/10] arm64: Kconfig: enable UEFI on BE kernels Ard Biesheuvel
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