[PATCH] ld: pru: Increase the default memory region sizes

[PATCH] ld: pru: Increase the default memory region sizes

[Dimitar Dimitrov]

The default memory region sizes for PRU were set somewhat arbitrarily to
the sizes of the most popular BeagleBone board with AM33x SoC.  But the
PRU toolchain documentation has always instructed to use SoC-specific
spec files to override the defaults and set the correct memory sizes [1].

The small default memory sizes can cause IMEM memory region overflow
even for simple printf("Hello world") programs, as usually done by
Autotools checks.  The stdio is simply too big to fit in 8K
instruction memory.  This can confuse the check and lead to wrong
feature selection during configure [2].

Fix by bumping the default DMEM and IMEM memory sizes.

There is no need to backport this patch.  Issue was caught with a
feature-rich newlib build used for daily CI.  The release builds of the
PRU toolchain use stripped newlib configuration, which does not overflow
the IMEM region, even for 8K.

Ok for master?

[1] https://github.com/dinuxbg/gnuprumcu
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115158

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
---
 ld/emulparams/pruelf.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ld/emulparams/pruelf.sh b/ld/emulparams/pruelf.sh
index 48e9a3a3bea..7ed5d33bcb6 100644
--- a/ld/emulparams/pruelf.sh
+++ b/ld/emulparams/pruelf.sh
@@ -11,9 +11,9 @@ COMMONPAGESIZE="CONSTANT (COMMONPAGESIZE)"
 EMBEDDED=yes
 
 TEXT_ORIGIN=0x20000000
-TEXT_LENGTH=8K
+TEXT_LENGTH=256K
 DATA_ORIGIN=0x0
-DATA_LENGTH=8K
+DATA_LENGTH=256K
 
 ENTRY=_start
 EXTRA_EM_FILE=pruelf
-- 
2.45.0

Re: [PATCH] ld: pru: Increase the default memory region sizes

[Nick Clifton]

Hi Dimitar,

> Fix by bumping the default DMEM and IMEM memory sizes.

> Ok for master?

Approved - please apply.

Cheers
   Nick