On Mon, Mar 3, 2008 at 5:20 PM, Wolfgang Denk wd@denx.de wrote:

In message 000001c87d22$0da9c8d0$9a4d010a@Emea.Arm.com you wrote:

...

  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

Do we really need all these directories? No chance to use common code at least for some of them?

Best regards,

Wolfgang Denk

-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de Is not that the nature of men and women -- that the pleasure is in the learning of each other? -- Natira, the High Priestess of Yonada, "For the World is Hollow and I Have Touched the Sky", stardate 5476.3.

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Hi,

If we move all the startup code and lib routines to thumb instructions we could maintain a single directory for all the ARM architectures and upward compatible too :-)

Thanks & Regards, Shinose.

-----Original Message----- From: wd@denx.de [mailto:wd@denx.de] Sent: 03 March 2008 11:51 To: Peter Pearse Cc: 'Vishal Oliyil Kunnil'; u-boot-users@lists.sourceforge.net Subject: Re: [U-Boot-Users] Cortex-M1 support

--snip--

Do we really need all these directories? No chance to use common code at least for some of them?

Provided we assume that the ARM Unified Assembler Language will eventually be supported in the mainline gcc code, we could manage with new directories:

./lib_armv6 ./cpu/armv6 ./cpu/armv7 ./include/asm-arm/arch-v6 ./include/asm-arm/arch-v7

,using ifdefs until the UAL support arrives.

The only code in these directories would be any assembler code required.

Currently arm directories hold about 150K assember code (.S) files Some of this code is common. Were this to be removed I believe the v6/v7/thumb support could be added without overall increase in the U-Boot source size.

Regards

Peter