rt-thread.git/bsp/cvitek/cv18xx_risc-v/board/board.c, branch copilot/remove-vbus-code-implementation

bsp: cvitek: riscv: use marco for linker script

2025-04-22T01:48:53Z

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

support milkv-duo rt-smart

2024-11-25T02:48:36Z

1. switches memory management to SLA 2. use ioremap modification driver Signed-off-by: flyingcys flyingcys@163.com

bsp: enable KERNEL_REMAP for cvitek platform

2024-07-29T12:18:19Z

Changes: - board.c: add static assert for KERNEL_VADDR_START to check if it's valid - board.h: updated deafult KERNEL_VADDR_START for standard version - config bsp for v5.2.0 smart requirements - kconfig: update bsp Kconfig for remap kernel Signed-off-by: Shell Reviewed-on: https://github.com/RT-Thread/rt-thread/pull/9229 Reviewed-by: Chen Wang

[libcpu] rv64: support for ARCH_REMAP_KERNEL (#9067)

2024-06-18T03:15:59Z

* [libcpu] support for ARCH_REMAP_KERNEL These changes introduce support for the ARCH_REMAP_KERNEL configuration, which isolates kernel space in high virtual address regions. This feature is necessary to enhance memory protection and management by segregating user and kernel spaces more effectively. Changes: - Updated conditional macros to check for ARCH_REMAP_KERNEL instead of ARCH_KERNEL_IN_HIGH_VA in board initialization files to reflect the new configuration option. - Modified qemu-virt64-riscv Kconfig and SConstruct files to include and utilize ARCH_REMAP_KERNEL. - Created a new linker script `link_smart.lds` for smart linking in qemu-virt64-riscv. - Updated rtconfig.py to use a more flexible execution path setup. - Enhanced user address space definitions in `lwp_arch.h` to support the new virtual address mappings. - Adjusted kernel memory initialization and mapping logic in `c906/mmu.c` and `virt64/mmu.c` to account for high virtual address regions. - Added Kconfig option to enable ARCH_REMAP_KERNEL for RISCV64 architectures. - Enhanced memory setup functions to support new mapping scheme, including updates to early page table setup and address relocation logic. These modifications ensure that the system can utilize high memory addresses for the kernel, improving memory isolation and system stability. Signed-off-by: Shell * fixup: CI run failed * bsp: default config without using smart * fixup: static checks * restore rt_hw_mmu_kernel_map_init for D1 --------- Signed-off-by: Shell

support cv181x-riscv for RT-SMART (#8724)

2024-04-02T23:37:45Z