u-boot.git/common/spl/spl.c, branch v2019.10

riscv: support SPL stack and global data relocation

2019-08-26T08:07:42+00:00

To support relocation of the stack and global data on RISC-V, the
secondary harts must be notified of the change using IPIs. We can reuse
the hart relocation code for this purpose. It uses global data to store
the new stack pointer and global data pointer for the secondary harts.
This means that we cannot update the global data pointer of the main
hart in spl_relocate_stack_gd(), because the secondary harts have not
yet been relocated at this point. It is updated after the secondary
harts have been notified.

Signed-off-by: Lukas Auer 
Reviewed-by: Bin Meng 
Tested-by: Bin Meng 
Reviewed-by: Anup Patel

spl: support booting via RISC-V OpenSBI

2019-08-26T08:07:42+00:00

RISC-V OpenSBI is an open-source implementation of the RISC-V Supervisor
Binary Interface (SBI) specification. It is required by Linux and U-Boot
running in supervisor mode. This patch adds support for booting via the
OpenSBI FW_DYNAMIC firmware. It supports OpenSBI version 0.4 and higher.

In this configuration, U-Boot SPL starts in machine mode. After loading
OpenSBI and U-Boot proper, it will start OpenSBI. All necessary
parameters are generated by U-Boot SPL and are passed to OpenSBI. U-Boot
proper is started in supervisor mode by OpenSBI. Support for OpenSBI is
enabled with CONFIG_SPL_OPENSBI. An additional configuration entry,
CONFIG_SPL_OPENSBI_LOAD_ADDR, is used to specify the load address of the
OpenSBI firmware binary. It is not used directly in U-Boot and instead
is intended to make the value available to scripts such as FIT
configuration generators.

The header file include/opensbi.h is based on header files from the
OpenSBI project. They are recent, as of commit bae54f764570 ("firmware:
Add fw_dynamic firmware").

Signed-off-by: Lukas Auer 
Reviewed-by: Bin Meng 
Tested-by: Bin Meng 
Reviewed-by: Anup Patel

spl: implement stack usage check

2019-08-11T20:43:41+00:00

This implements a stack usage check in SPL.

Many boards start up SPL to run code + data from one common, rather small
SRAM. To implement a sophisticated SPL binary size limit on such boards,
the stack size (as well as malloc size and global data size) must be
subtracted from this SRAM size.

However, to do that properly, the stack size first needs to be known.

This patch adds a new Kconfig option:
- SPL_SYS_REPORT_STACK_F_USAGE: memset(0xaa) the whole area of the stack
  very early and check stack usage based on this constant later before the
  stack is switched to DRAM

Initializing the stack and checking it is implemented in weak functions,
in case a board does not use the stack as saved in gd->start_addr_sp.

Signed-off-by: Simon Goldschmidt

watchdog: Split WDT from SPL_WDT

2019-07-19T18:14:50+00:00

Use CONFIG_IS_ENABLED(WDT) to permit use of WDT in SPL without DM,
while the full U-Boot can use rich DM/DT WDT driver.

Signed-off-by: Marek Vasut 
Cc: Peng Fan 
Cc: Stefano Babic 
Tested-by: Heiko Schocher 
Tested-by: Suniel Mahesh

spl: Fix typo in kernel doc

2019-07-11T14:05:15+00:00

Fix a tiny typo in boot_from_devices() kernel doc.

Signed-off-by: Miquel Raynal 
Reviewed-by: Stefan Roese

spl: Set spl_image->fdt_addr pointer for full fitImage configuration

2019-05-18T16:32:00+00:00

Set the spl_image->fdt_addr pointer both for simple fitImage configuration
as well as full fitImage configuration, to let spl_perform_fixups() access
the DT and perform modifications to it if necessary.

Signed-off-by: Marek Vasut 
Cc: Tom Rini

watchdog: Implement generic watchdog_reset() version

2019-04-26T07:16:32+00:00

This patch tries to implement a generic watchdog_reset() function that
can be used by all boards that want to service the watchdog device in
U-Boot. This watchdog servicing is enabled via CONFIG_WATCHDOG.

Without this approach, new boards or platforms needed to implement a
board specific version of this functionality, mostly copy'ing the same
code over and over again into their board or platforms code base.

With this new generic function, the scattered other functions are now
removed to be replaced by the generic one. The new version also enables
the configuration of the watchdog timeout via the DT "timeout-sec"
property (if enabled via CONFIG_OF_CONTROL).

This patch also adds a new flag to the GD flags, to flag that the
watchdog is ready to use and adds the pointer to the watchdog device
to the GD. This enables us to remove the global "watchdog_dev"
variable, which was prone to cause problems because of its potentially
very early use in watchdog_reset(), even before the BSS is cleared.

Signed-off-by: Stefan Roese 
Cc: Heiko Schocher 
Cc: Tom Rini 
Cc: Michal Simek 
Cc: "Marek Behún" 
Cc: Daniel Schwierzeck 
Cc: Maxim Sloyko 
Cc: Erik van Luijk 
Cc: Ryder Lee 
Cc: Weijie Gao 
Cc: Simon Glass 
Cc: "Álvaro Fernández Rojas" 
Cc: Philippe Reynes 
Cc: Christophe Leroy 
Reviewed-by: Michal Simek 
Tested-by: Michal Simek  (on zcu100)

spl: add debug print for early malloc usage

2019-02-28T19:21:46+00:00

To find out how big the early malloc heap must be in SPL, add a debug
print statement that dumps its usage before switching to relocated heap
in spl_relocate_stack_gd() via CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN.

Signed-off-by: Simon Goldschmidt

spl: implement CRC check on U-Boot uImage

2019-02-19T13:55:43+00:00

SPL currently does not check uImage CRCs when loading U-Boot.

This patch adds checking the uImage CRC when SPL loads U-Boot. It does
this by reusing the existing config option SPL_CRC32_SUPPORT to allow
leaving out the CRC check on boards where the additional code size or
boot time is a problem (adding the CRC check currently adds ~1.4 kByte
to flash).

The SPL_CRC32_SUPPORT config option now gets enabled by default if SPL
support for legacy images is enabled to check the CRC on all boards
that don't actively take countermeasures.

Signed-off-by: Simon Goldschmidt 
Reviewed-by: Simon Glass

spl: Add support for passing handoff info to U-Boot proper

2018-11-26T13:25:37+00:00

There is some basic informaton that SPL normally wants to pass through to
U-Boot, such as the SDRAM size and bank information.

Mkae use of the new bloblist structure for this. Add a new 'handoff' blob
which is set up in SPL and passed to U-Boot proper. Also adda  test for
sandbox_spl that checks that this works correctly and a new 'sb' command
to show the information passed from SPL.

Reviewed-by: Tom Rini 
Signed-off-by: Simon Glass