Commit graph

4 commits

Author SHA1 Message Date
Daniel DeGrasse
6023d6a142 arch: common: fix copy for ramfunc region during XIP init
ramfunc region is copied into RAM from FLASH region during XIP init. We
copy from the loadaddr of the region, and were previously loading to the
symbol __ramfunc_start. This is incorrect when using an MPU with
alignment requirements, as the __ramfunc_start symbol may have padding
placed before it in the region. The __ramfunc_start symbol still needs
to be aligned in order to be used by the MPU though, so define a new
symbol __ramfunc_region_start, and use that symbol when copying the
__ramfunc region from FLASH to RAM.

Fixes #75296

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
2024-11-06 10:19:08 -08:00
Mahesh Mahadevan
b2d3fdceff cmake: Add support to add symbols to ramfunc section
This PR allows the user to add symbols to the ramfunc
section. The use for this could be as follows:

zephyr_linker_sources_ifdef(CONFIG_ARCH_HAS_RAMFUNC_SUPPORT
  RAMFUNC_SECTION
  quick_access_code.ld
)

quick_access_code.ld (as shown below) can define additional
symbols to  go into the ramfunc section

. = ALIGN(4);
KEEP(*(CodeQuickAccess))

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>
2022-04-18 17:24:12 -07:00
Torsten Rasmussen
510d7dbfb6 linker: align _ramfunc_ram/rom_start/size linker symbol names
Cleanup and preparation commit for linker script generator.

Zephyr linker scripts provides start and end symbols for each section,
and sometimes even size and LMA start symbols.

Generally, start and end symbols uses the following pattern, as:
Section name:             foo
Section start symbol:     __foo_start
Section end symbol:       __foo_end

However, this pattern is not followed consistently.
To allow for linker script generation and ensure consistent naming of
symbols then the following pattern is introduced consistently to allow
for cleaner linker script generation.
Section name:             foo
Section start symbol:     __foo_start
Section end symbol:       __foo_end
Section size symbol:      __foo_size
Section LMA start symbol: __foo_load_start

This commit aligns the symbols for _ramfunc_ram/rom to other symbols and
in such a way they follow consistent pattern which allows for linker
script and scatter file generation.

The symbols are named according to the section name they describe.
Section name is `ramfunc`

The following symbols are aligned in this commit:
-  _ramfunc_ram_start  -> __ramfunc_start
-  _ramfunc_ram_end    -> __ramfunc_end
-  _ramfunc_ram_size   -> __ramfunc_size
-  _ramfunc_rom_start  -> __ramfunc_load_start

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
2021-08-28 08:48:03 -04:00
Øyvind Rønningstad
6d0039444c arch: Port the ramfunc section to the Cmake function
Remove it from linker.ld

Signed-off-by: Øyvind Rønningstad <oyvind.ronningstad@nordicsemi.no>
2019-05-20 22:28:28 -04:00