u-boot.git/arch/mips/cpu, branch v2022.04

Convert CONFIG_SKIP_LOWLEVEL_INIT et al to Kconfig

2021-08-31T21:47:49+00:00

This converts the following to Kconfig:
   CONFIG_SKIP_LOWLEVEL_INIT
   CONFIG_SKIP_LOWLEVEL_INIT_ONLY

In order to do this, we need to introduce SPL and TPL variants of these
options so that we can clearly disable these options only in SPL in some
cases, and both instances in other cases.

Signed-off-by: Tom Rini

mips: enable _machine_restart for spl

2021-01-24T20:39:26+00:00

The sysreset driver has a config CONFIG_SPL_SYSRESET for the spl stage.
Change CONFIG_SYSRESET to CONFIG_IS_ENABLED(SYSRESET) will give spl a
chance to use _machine_restart instead of the sysreset driver.

Reviewed-by: Stefan Roese 
Reviewed-by: Simon Glass 
Signed-off-by: Weijie Gao

mips: start.S: Add Octeon boot header compatibility

2020-11-30T17:31:56+00:00

Octeon has a specific boot header, when booted via SPI NOR, NAND or MMC.
Here the only 2 instructions are allowed in the first few bytes of the
image. And these instructions need to be one branch and a nop. This
patch adds the necessary nop after the nop, to that the common MIPS
image is compatible with this Octeon header.

The tool to patch the Octeon boot header into the image will be send in
a follow-up patch.

Signed-off-by: Stefan Roese 
Cc: Aaron Williams 
Cc: Chandrakala Chavva 
Cc: Daniel Schwierzeck 
Reviewed-by: Daniel Schwierzeck

mips: Add CONFIG_MIPS_MACH_EARLY_INIT for very early mach init code

2020-07-18T12:23:25+00:00

This patch adds the optional call to mips_mach_early_init() to start.S
at a very early stage. Its disabled per default. It can be used for
very early machine / platform specific init code.  Its called very
early and at this stage the PC is allowed to differ from the linking
address (CONFIG_TEXT_BASE) as no absolute jump has been performed until
this call.

It will be used by thje Octeon platform.

Signed-off-by: Stefan Roese 
Reviewed-by: Daniel Schwierzeck

mips: sync asm/mipsregs.h with Linux 5.7

2020-07-18T12:23:25+00:00

Sync asm/mipsregs.h with Linux 5.7. Also replace the custom
symbols EBASE_CPUNUM and EBASE_WG with the according symbols
from Linux.

Signed-off-by: Daniel Schwierzeck 
Reviewed-by: Stefan Roese 
Tested-by: Stefan Roese

mips: add config options for generic cache setup code

2020-07-18T12:23:25+00:00

Add an own Kconfig symbol for the initial disabling of caches
invoked from generic start code.

Also add an own Kconfig symbols for the initialization of caches
invoked from generic start code.

Until now both code paths could only be disabled with
CONFIG_SKIP_LOWLEVEL_INIT. But this is not flexible enough for
RAM boot scenarios like EJTAG or SPL payload or for machines
which don't require cache initialization or which want to
provide their own cache implementation.

Signed-off-by: Daniel Schwierzeck 
Reviewed-by: Stefan Roese 
Tested-by: Stefan Roese

mips: refactor disabling of caches

2020-07-18T12:23:25+00:00

Logically this code belongs to cache_init.S.

If a complex SoC needs to replace the generic cache init,
mips_cache_disable() can now be called from custom start.S files.

Signed-off-by: Daniel Schwierzeck 
Reviewed-by: Stefan Roese 
Tested-by: Stefan Roese

mips: start.S: remove dead code

2020-07-18T12:23:25+00:00

Since commit 703ec9ddf965 ("MIPS: Stop building position independent code")
the relocation code was completely reworked and removed from start.S.
Remove some left-overs of the old code.

Signed-off-by: Daniel Schwierzeck 
Reviewed-by: Stefan Roese 
Tested-by: Stefan Roese

mips: time: Only compile the weak get_tbclk() when needed

2020-07-18T12:23:24+00:00

This patch opts-out the compilation of get_tbclk() if
CONFIG_SYS_MIPS_TIMER_FREQ is not defined. This is used on the Octeon
platform, where the weak get_tbclk() function is overwritten by its
platform specific one.

Signed-off-by: Stefan Roese

command: Remove the cmd_tbl_t typedef

2020-05-18T22:36:55+00:00

We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.

Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.

This requires quite a few header-file additions.

Signed-off-by: Simon Glass