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Date: Tue, 14 Mar 2023 23:06:36 +0100
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Subject: Re: [PATCH v1 0/3 CHIP: Support vendor script libraries
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To: binutils@sourceware.org
Cc: nickc@redhat.com
References: <20230314220114.1117782-1-binutils@emagii.com>
From: Ulf Samuelsson <binutils@emagii.com>
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There are no NEWS, ld.texi or testsuite for these patches yet
since they are just RFCs at the moment.

Need to get the copyright issue sorted out.

I finally got reply from FSF on Copyrights, but they think it could take
some time to process.

Best Regards
Ulf Samuelsson

On 2023-03-14 23:01, Ulf Samuelsson via Binutils wrote:
> Patchset 1
>
> Introduce the CHIP command for non-MRI script files.
>
> The motivation is that you want to simplify supporting microcontrollers.
> You want include files that define the addresses for all peripherals
> and the memory/bank organisation.
>
> CHIP "<chip>" will add directories to the include directory list
> and will then include the "<chip>.inc" file.
>
> chip "<chip>" will add
> * "$PROJ_DIR"
> * "$LD_USER_DIR/<chip>"
> * "$LD_VENDOR_DIR/<chip>"
> to the search list for script files.
>
> The search order will be:
>
> "<Current directory>"
> "$PROJ_DIR"
> "$LD_USER_DIR/<chip>"
> "$LD_VENDOR_DIR/<chip>"
>
> This allows the vendor to supply a directory tree (LD_VENDOR_DIR).
> with a subdirectory for each chip.
>
> The subdirectory contains the "<chip>.inc" file which
> can have the flash sectors using the BANK command
> (patch posted to the link) as well as symbols
> for all the peripherals for the chip.
>
> Obviously, the vendor can place other files there as well.
>
> chip "at91sam7s64"
>
> would result in the linker including the file
> $LD_VENDOR_DIR/at91sam7s64/at91sam7s64.inc
>
> Since the vendor might be late with supplying include files
> for a chip, the user can create a similar directory in LD_USER_DIR.
>
> chip "at91sam7s64"
>
> This would result in the linker including the file
> $LD_USER_DIR/atmel/at91sam7s64/at91sam7s64.inc
> since LD_USER_DIR is before LD_VENDOR_DIR in the search order.
>
> If the user wants to simply put the file in their project
> they can rely on the search order, or put the file in $PROJ_DIR
>
> chip "at91sam7s64";
>
> This would result in the linker including the file
> $PROJ_DIR/at91sam7s64.inc
>
> =================================
>
> I am considering a further extension:
>
> chip "at91sam7s64", "atmel";
>
> This would result in the linker including the file
> $LD_VENDOR_DIR/atmel/at91sam7s64/at91sam7s64.inc
>
> [PATCH v1 1/3] CHIP: ldlex.l
> [PATCH v1 2/3] CHIP: ldgram.y
> [PATCH v1 3/3] CHIP: language additions
>