Enable CONFIG_OF_BOAD to support delivery dtb to u-boot
at run time instead of embedded.
There are two methods to delivery dtb.
1 Pass from loader:
When u-boot boot from RAM, gdb or loader can pass dtb
via a2 to u-boot dynamically. Of course gdb or loader
shall be in charge of dtb delivery.
2 Configure CONFIG_SYS_FDT_BASE:
It can be configured as RAM or ROM base statically,
no mater u-boot boot from RAM or ROM.
If it was configured as ROM base, dtb can be burned
into ROM(spi flash) by spi driver.
Meanwhile remove CONFIG_SKIP_LOWLEVEL_INIT which is
useless in nx25-ae250 configuration.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Cc: Greentime Hu <green.hu@gmail.com>
ATAGS is not supported and will be replaced
by DT in riscv-linux. So can be removed now.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
riscv-linux should use BBL (Berkeley bootloader) for
loading the Linux kernel.
U-Boot can play as FSBL(first stage bootloader)
to boot BBL and riscv-linux.
In BBL's init_first_hart(), it will pass dtb with a1.
So implement bootm to pass arguments to BBL correctly.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
It is reported by checkpatch.pl
WARNING: static const char * array
should probably be static const char * const
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
It is reported by checkpatch.pl
WARNING: Missing a blank line after declarations.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
It is reported by checkpatch.pl.
CHECK: Alignment should match open parenthesis
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
It is reported by checkpatch.pl
WARNING: Use of volatile is usually wrong: see
Documentation/process/volatile-considered-harmful.rst
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
It is CHECK reported by checkpatch.pl
CHECK: Macro argument reuse 'PTE' - possible side-effects?
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Add Kconfig and makefile for RISC-V
Also modify MAINTAINERS for it.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Cc: Padmarao Begari <Padmarao.Begari@microsemi.com>
Add header files for RISC-V.
Cache, ptregs, data type and other definitions are included.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>
AE250 is the Soc using NX25 cpu core base on RISC-V arch.
Details please see the doc/README.ae250.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Add makefile, interrupts.c and boot.c,... functions
to support RISC-V arch.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Cc: Padmarao Begari <Padmarao.Begari@microsemi.com>
Add Andes nx25 cpu core (called AndesStar V5) to support RISC-V arch
Verifications:
1. startup and relocation ok.
2. boot from rom or ram both ok.
2. timer driver ok.
3. uart driver ok
4. mmc driver ok
5. spi driver ok.
6. 32/64 bit both ok.
Detail verification message please see doc/README.ae250.
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Cc: Padmarao Begari <Padmarao.Begari@microsemi.com>
Rick Chen