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

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* [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 <smokewood@qq.com>

* 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 <smokewood@qq.com>
This commit is contained in:
Shell
2024-06-18 11:15:59 +08:00
committed by GitHub
parent 73727fa06e
commit 65c9947225
17 changed files with 700 additions and 323 deletions
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components/lwp/arch/risc-v/rv64/lwp_arch.h
+9
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@@ -25,6 +25,15 @@
#define USER_VADDR_TOP 0xFF000000UL
#define USER_LOAD_VADDR 0xD0000000UL
#define LDSO_LOAD_VADDR USER_LOAD_VADDR
#elif defined(ARCH_REMAP_KERNEL)
#define USER_VADDR_START 0x00001000UL
#define USER_VADDR_TOP 0x003ffffff000UL
#define USER_STACK_VSTART 0x000270000000UL
#define USER_STACK_VEND USER_HEAP_VADDR
#define USER_HEAP_VADDR 0x000300000000UL
#define USER_HEAP_VEND USER_VADDR_TOP
#define USER_LOAD_VADDR 0x200000000
#define LDSO_LOAD_VADDR 0x200000000
#else
#define USER_HEAP_VADDR 0x300000000UL
#define USER_HEAP_VEND USER_STACK_VSTART