diff options
| author | Adam Ford | 2018-08-04 16:34:54 -0500 |
|---|---|---|
| committer | Tom Rini | 2018-09-10 20:48:16 -0400 |
| commit | de39dc71625d1a66cc611d1a85bf53545cba60a3 (patch) | |
| tree | e069c7eb142c0ad74bb3a247f28357153adf3299 /doc/README.omap3 | |
| parent | d7c09684d73c4831a0240ce1fcbe7644bc3ab6e7 (diff) | |
arm: armv7-a: Compile and tune for armv7-a instead of armv5
arch/arm/Makefile references armv5 for backwards compatibility with
older compilers. This patch removes those references to armv5,
since by now newer compilers are required which should have armv7
support enabled.
The Makefile also also has a list of options for mtune, but the
entry for CONFIG_CPU_V7A is empty, so this patch tunes the
CPU_V7A architecture to generic-armv7-a.
The following size changed apply to omap3_logic using GCC.
Stock
text data bss dec hex filename
50910 429 67580 118919 1d087 spl/u-boot-spl
540713 22700 327072 890485 d9675 u-boot
Without Armv5
text data bss dec hex filename
50916 429 67580 118925 1d08d spl/u-boot-spl
540719 22700 327064 890483 d9673 u-boot
mtune=generic-armv7-a
text data bss dec hex filename
50932 429 67580 118941 1d09d spl/u-boot-spl
540519 22700 327080 890299 d95bb u-boot
Signed-off-by: Adam Ford <aford173@gmail.com>
Diffstat (limited to 'doc/README.omap3')
| -rw-r--r-- | doc/README.omap3 | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/doc/README.omap3 b/doc/README.omap3 index e09ac032c0f..00bcbdba9ac 100644 --- a/doc/README.omap3 +++ b/doc/README.omap3 @@ -23,13 +23,6 @@ Currently the following boards are supported: * CompuLab Ltd. CM-T35 [8] -Toolchain -========= - -While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile -with -march=armv5 to allow more compilers to work. For U-Boot code this has -no performance impact. - Build ===== |