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Regarding link script, some memory offsets and sizes are different
between the standard version and the smart version (such as
"__STACKSIZE__", kernel start address, kernel memory size, etc.).
Original solution is replacing link scripts and use INCLUDE,
which is relatively complicated.
This improvement uses macros to replace constants in the link
script. The preprocessing mechanism provided by gcc is used
to dynamically replace constant values during the build process.
In addition, the kernel load address (the corresponding
KERNEL_VADDR_START for smart) was originally configured as
0xFFFFFFC000200000, which is default value of riscv with
kernelmap enabled (0xffffffc000000000) plus offset to skip over
bootloader (0x200000). This caused a trouble: due to
default bsp configuration is for smart, if we switched to the
standard version and build, and then switched back to the smart
version, the value of KERNEL_VADDR_START will be default back to
0xffffffc000000000, which is different from the original configuration
value, resulting in the need to manually reconfigure it, which
is easy to forget and cause problems.
The current solution is to use the default value
0xffffffc000000000 in the configuration. Add offset to the code
and link script when using it.
This patch update the default .config and rtconfig.h for cv18xx_riscv.
Signed-off-by: Chen Wang <[email protected]>
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Originally, for riscv big and little cores under bsp/cvitek,
after generating rtthread.bin, the cvitek_bootloader tool
would be used to package it and generate fip.bin and boot.sd
files that can be burned into sdcard. However, the
cvitek_bootloader tool repository is relatively large, and
it compiles and generates firmware such as fsbl, opensbi and
uboot from the source code level. And when using it, it
needs to be downloaded to the bsp/cvitek directory, which
will introduce pollution to source files in the RTT repository
under the original working path.
The new solution uses rttpkgtool, which is similar to
cvitek_bootloader, but it uses prebuilt firmware, so it is
very small and does not introduce pollution to the source file.
Signed-off-by: Chen Wang <[email protected]>
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1. switches memory management to SLA
2. use ioremap modification driver
Signed-off-by: flyingcys [email protected]
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update cvitek sdhci drvier
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support cvitek sdhci drvier
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update cv18xx series README.md
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