Commit e05e5de7 made the 2 1st parameters of
ARM's relocate_code() useless since it moved the code handling them to crt0.S.
So, drop these parameters.
Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>

Use __image_copy_end instead of __bss_start for the end of the image to
relocate. This is the same as commit 033ca724, but applied to all ARM start.S.

This is a more appropriate symbol naming for an image copy & relocate feature,
and this also saves a useless copy of data put between __image_copy_end and
__bss_start in linker scripts (e.g. relocation information, or MMU
initialization tables used only before jumping to the relocated image).
Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>

Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>

Commit e05e5de7 made ARM's relocate_code()
return to its caller, but it did not update its declaration accordingly.

Fixing this function declaration fixes dropped C code following calls to
relocate_code().
Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>

_TEXT_BASE must be set to CONFIG_SPL_TEXT_BASE for generic SPL, and to
CONFIG_SYS_TEXT_BASE for non-SPL builds.
Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>
Reviewed-by: NTom Rini <trini@ti.com>

The _start symbol is already relocated, so do not add the relocation the second
time in c_runtime_cpu_setup.

This fixes e.g. the abort exception handling path, which ended in double fault
due to bad address in VBAR.
Signed-off-by: NVincent Stehlé <v-stehle@ti.com>
Reported-by: NLubomir Popov <lpopov@mm-sol.com>

Add common code to enable the workaround for ARM erratum 716044. This
will be enabled for Tegra.
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Note this is a tree-wide change affecting multiple architectures.

At present we use __bss_start, but mostly __bss_end__. This seems
inconsistent and in a number of places __bss_end is used instead.

Change to use __bss_end for the BSS end symbol throughout U-Boot. This
makes it possible to use the asm-generic/sections.h file on all
archs.
Signed-off-by: NSimon Glass <sjg@chromium.org>

Various errata exist in the Cortex-A9 CPU, and may be worked around by
setting some bits in a CP15 diagnostic register. Add code to implement
the workarounds, enabled by new CONFIG_ options.

This code was taken from the Linux kernel, v3.8, arch/arm/mm/proc-v7.S,
and modified to remove the logic to conditionally apply the WAR (since we
know exactly which CPU we're running on given the U-Boot configuration),
and use r0 instead of r10 for consistency with the rest of U-Boot's
cpu_init_cp15().
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NSimon Glass <sjg@chromium.org>

This patch adds basic Tegra30 (T30) build support - no specific
board is targeted.
Signed-off-by: NTom Warren <twarren@nvidia.com>
Reviewed-by: NStephen Warren <swarren@nvidia.com>

Move all the C runtime setup code from every start.S
in arch/arm into arch/arm/lib/crt0.S. This covers
the code sequence from setting up the initial stack
to calling into board_init_r().

Also, rewrite the C runtime setup and make functions
board_init_*() and relocate_code() behave according to
normal C semantics (no jumping across the C stack any
more, etc).

Some SPL targets had to be touched because they use
start.S explicitly or for some reason; the relevant
maintainers and custodians are cc:ed.
Signed-off-by: NAlbert ARIBAUD <albert.u.boot@aribaud.net>

We don't need to return to cpu_init_crit after calling lowlevel_init, so
lowlevel_init can directly return to the caller of cpu_init_crit.
Signed-off-by: NBenoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>

In SPL (CONFIG_SPL_FRAMEWORK) board_init_f must setup the stack pointer,
clear the BSS and call board_init_r.  We mark this as weak as some
platforms may need to perform additional initalization at this point.
We provide a gd that we know will be in a usable location, once the BSS
has been cleared to help with this as well.  Finally, we no longer call
relocate_code so remove that from the armv7 version.

Next, both board_init_f and jump_to_image_linux are going to be
inherently arch-specific, so move these versions to arch/arm/lib/spl.c
Signed-off-by: NTom Rini <trini@ti.com>

save_boot_params_default() in cpu.c accesses uninitialized stack area
when it compiled with -O0 (not optimized).
This patch removes save_boot_params_default() and put the equivalent in start.S
Signed-off-by: NTetsuyuki Kobayashi <koba@kmckk.co.jp>
Acked-by: NTom Rini <trini@ti.com>

Add SPL options to tegra20 config files and enable SPL build for
tegra20 boards.  Also remove redundant code from u-boot that is not
contained in SPL.
Signed-off-by: NAllen Martin <amartin@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Tested-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NTom Warren <twarren@nvidia.com>

This is make naming consistent with the kernel and devicetree and in
preparation of pulling out the common tegra20 code.
Signed-off-by: NAllen Martin <amartin@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Tested-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NTom Warren <twarren@nvidia.com>

In currently, when __bss_start is equal to __bss_end__,
The bss loop will clear all the things in memory space.

But just only when __bss_end__ greater than __bss_start__,
we do the clear bss section operation.
Signed-off-by: NZhong Hongbo <bocui107@gmail.com>
Acked-by: NAndreas Bießmann <andreas.devel@googlemail.com>

Interrupts and exceptions doesn't work in relocated code.
It badly use IRQ_STACK_START_IN in rom area as interrupt stack.
It is because the vecotr table is not moved to ram area.
This patch moves vector table before jumping relocated code.
Signed-off-by: NTetsuyuki Kobayashi <koba@kmckk.co.jp>
Tested-by: NTom Rini <trini@ti.com>

Use ENTRY and ENDPROC with assembly functions to ensure
necessary assembler directives for all functions.
Signed-off-by: NAneesh V <aneesh@ti.com>
Acked-by: NMike Frysinger <vapier@gentoo.org>

commit 0d479b53 (Aneesh V) added code for OMAP4 that doesn't
execute on Tegra, due to the AVP (ARM7TDI) not having a CP15.
Result was an undefined instruction hang just after reset.
Signed-off-by: NTom Warren <twarren@nvidia.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Tom Rini <trini@ti.com>
Acked-by: NAneesh V <aneesh@ti.com>

Since we have cache support built in we can remove Tegra's existing cache
initialization code amd other related dead code.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NTom Warren <twarren@nvidia.com>

Some SOCs have do not start up with their 'main' CPU. The first U-Boot
code may then be executed with a CPU which does not have a CP15, or not a
useful one.

Here we split the initialization of CP15 into a separate call, which can
be performed later if required.

Once the main CPU is running, you should call cpu_init_cp15() to perform
this init as early as possible.

Existing ARMv7 boards which define CONFIG_SKIP_LOWLEVEL_INIT should not
need to change, this CP15 init is still skipped in that case. The only
impact for these boards is that the cpu_init_cp15() will be available
even if it is never used on these boards.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Signed-off-by: NTom Warren <twarren@nvidia.com>

Cc: Tom Rini <trini@ti.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Signed-off-by: NAneesh V <aneesh@ti.com>
Acked-by: NTom Rini <trini@ti.com>

The vector is not correctly setup in armv7 except for OMAP3.
Correcting this.

Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Signed-off-by: NAneesh V <aneesh@ti.com>

- Add MMC raw and FAT mode boot support for OMAP
- Provide a means by which parameters passed by ROM-code
  can be saved in u-boot.
- Save boot mode related information passed by OMAP4 ROM-code
  and use it to determine where to load the u-boot from
- Assumes that the image has a mkimage header. Gets the
  payload size and load address from this header. If the
  header is not detected assume u-boot.bin as payload
Signed-off-by: NAneesh V <aneesh@ti.com>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>

- Allow SPL to have .bss disjoint from rest of the image
- Allow for .bss setup in CONFIG_SPL_BUILD case too.
- Take care of the special case where relocation offset = 0.
- Compile out exception handling code and install a simpler
  vector
Signed-off-by: NAneesh V <aneesh@ti.com>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>

replace all occurences of CONFIG_PRELOADER with CONFIG_SPL_BUILD
Signed-off-by: NAneesh V <aneesh@ti.com>

cpu_init_crit can be skipped, but the code is still enabled requiring a
platform to supply lowlevel_init.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Cc: Albert ARIBAUD <albert.aribaud@free.fr>

- Enable I-cache on bootup
- Enable MMU and D-cache immediately after relocation
	- Do necessary initialization before enabling d-cache and MMU
- Changes to cleanup_before_linux()
	- Make changes according to the new framework
Signed-off-by: NAneesh V <aneesh@ti.com>

Signed-off-by: NWolfgang Denk <wd@denx.de>

Signed-off-by: NTom Warren <twarren@nvidia.com>

CONFIG_OMAP34XX must be checked for existence, not value.
Signed-off-by: NLuca Ceresoli <luca.ceresoli@comelit.it>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Albert Aribaud <albert.aribaud@free.fr>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>

Monitor protection region in FLASH did not cover .rel.dyn
and .dynsym sections, because it uses __bss_start to compute
monitor_flash_len. Use _end instead.

Add _end to linker scripts for end of u-boot image
Add _end_ofs to all the start.S.
Signed-off-by: NPo-Yu Chuang <ratbert@faraday-tech.com>

Currently, _end is used for end of BSS section.  We want _end to mean
end of u-boot image, so we rename _end to __bss_end__ first.
Signed-off-by: NPo-Yu Chuang <ratbert@faraday-tech.com>

Remove the useless code from start.S
Signed-off-by: NJason Liu <r64343@freescale.com>
Tested-by: NAndreas Bießmann <andreas.devel@googlemail.com>

Make code build with older tool chains.
Signed-off-by: NWolfgang Denk <wd@denx.de>

I doubt the stack_setup() was defective before:
 we load the current location of _start and compare against destination
 of relocate_code(). If we are already there we shoud skip the
 relocation and jump over to clear_bss. Before the clear_bss was also skipped.
Signed-off-by: NAndreas Bießmann <andreas.devel@googlemail.com>

r8 is used for global_data and should therefore be left alone!

For C code the compiler flag --fixed-r8 does the job, but in assembler
we need to be aware of that fact.
Signed-off-by: NAndreas Bießmann <andreas.devel@googlemail.com>

In case we are still at relocation target address before relocation we
do not need to load the registers needed for relocation. We should
instead skip the whole relocation part and jump over to clear_bss
immediately.
Signed-off-by: NAndreas Bießmann <andreas.devel@googlemail.com>

This patch uses r1 as scratch register for copy_loop(). Therefore we do
not longer need r7 for the storage of relocate_code()'s 'addr_moni' (the
destination address of relocation).
Therefore r7 can be used later on for other purposes.
Signed-off-by: NAndreas Bießmann <andreas.devel@googlemail.com>