[U-Boot-Users] Cortex-M1 support

[Peter Pearse]

> -----Original Message-----
> From: u-boot-users-bounces at lists.sourceforge.net 
> [mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf 
> Of Vishal Oliyil Kunnil
> Sent: 03 March 2008 09:18
> To: U-Boot-Users at lists.sourceforge.net
> Cc: wd at denx.de
> Subject: [U-Boot-Users] Cortex-M1 support
> 
> Hi all,
> 
> i have ported u-boot on Cortex-M1 series - It does not use 
> the conventional arm routines in lib_arm (as Cortex M1 need 
> these in Thumb-2). What is the correct method of integrating 
> it in to u-boot ?
> For now I have a new directory named lib_armv6-m. Is it 
> better to use place the lib files in existing arm folder ?
> 
> Best regards,
> Vishal Oliyil Kunnil

Vishal
	Currently I'm envisaging

	./lib_arm		Existing armv4,v5 assembly code
	./lib_armv6		New v6 arm assembly code
	./lib_armv6m	New v6 thumb assembly code
	./lib_armv7		New v7 arm assembly code
	./lib_armv7m	New v7m thumb assembly code
	./cpu/armxxx	Existing arm v4,v5 cpus
	./cpu/armv6		New v6 arm cpus
	./cpu/armv6m      New v6 thumb cpus
	./cpu/armv7       New v7 arm cpus
	./cpu/armv7m      New v7 thumb cpus
	./include/asm-arm/arch-v6	v6 socs
	./include/asm-arm/arch-v6m    v6 thumb socs
	./include/asm-arm/arch-v7     v7 socs
	./include/asm-arm/arch-v7m    v7 thumb socs

However it may be possible to reduce this depending on toolchains,
use of unified assembler code, ifdefs etc

I suggest you submit a patch with any v6m dependent code split out as above.

Please try to keep as much code as possible in existing locations, 
rather than making identical copies.

I assume you are using the Code Sourcery toolchain....

Regards

Peter