This is only required for "PIC" relocation and doesn't apply to modern
"PIE" relocation which does data relocation as well as code.
"init_sequence_r" is just an array that consists of compile-time
adresses of init functions. Since this is basically an array of integers
(pointers to "void" to be more precise) it won't be modified during
relocation - it will be just copied to new location as it is.
As a consequence on execution after relocation "initcall_run_list" will
be jumping to pre-relocation addresses. As long as we don't overwrite
pre-relocation memory area init calls are executed correctly. But still
it is dangerous because after relocation we don't expect initially used
memory to stay untouched.
Cc: Tom Rini <trini@ti.com>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Doug Anderson <dianders@chromium.org>
Cc: Thomas Langer <thomas.langer@lantiq.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Add hooks for tracing to generic board, including:
- allow early tracing to start early as possible in U-Boot
- reserve memory for trace buffer
- copy early trace buffer to main trace buffer after relocation
- setup full tracing support after relocation
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit refactors common/board_f.c and common/board_r.c
in order to delete the dest_addr and dest_addr_sp from
gd_t struct.
As mentioned as follows in include/asm-generic/global_data.h,
/* TODO: is this the same as relocaddr, or something else? */
unsigned long dest_addr; /* Post-relocation address of U-Boot */
dest_addr is the same as relocaddr.
Likewise, dest_addr_sp is the same as start_addr_sp.
It seemed dest_addr/dest_addr_sp was used only as a scratch variable
to calculate relocaddr/start_addr_sp, respectively.
With a little refactoring, we can delete dest_addr and dest_addr_sp.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
In a previous CL we added the bootstage_relocate(), which should be
called after malloc is initted. Now we call it on generic board.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add generic board support for sandbox. and remove the old board init code.
Select CONFIG_SYS_GENERIC_BOARD for sandbox now that this is supported.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
Currently x86 has its own means of managing the global data and board data
(bd_t), and this code resides in start.S. With generic board, we need to
ensure that we leave this alone - i.e. don't clear it as we do on other
archs.
This fixes a problem where the memory init data is cleared which causes
the video driver to operate very slowly.
Signed-off-by: Simon Glass <sjg@chromium.org>
For x86 the global_data is managed entirely by the start.S code so we do
not need to touch it. However, we do have some more initcalls to add.
Signed-off-by: Simon Glass <sjg@chromium.org>
