[rt-smart] kernel virtual memory management layer

[polarvid]

拉取/合并请求描述：(PR description)

[

为什么提交这份PR (why to submit this PR)

synchronize virtual memory system works.

• adding kernel virtual memory management layer for page-based MMU enabled architecture
• porting libcpu MMU codes
• porting lwp memory related codes

你的解决方案是什么 (what is your solution)

在什么测试环境下测试通过 (what is the test environment)

]

当前拉取/合并请求的状态 Intent for your PR

必须选择一项 Choose one (Mandatory):

• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification

[mysterywolf]

请将libc signal的这个问题单独抽出来提交一个PR，不要混在这个PR中

[mysterywolf]

CI 报错不用理

[mysterywolf]

这个PR重新命名一下 标题名字太模糊了 写一下PR的描述

[wosayttn]

Failed to build all arm926ejs BSPs after the merging.
Miss arm926ejs CPU driver support?

[polarvid]

I suppose SConscript should be replaced

diff --git a/components/mm/SConscript b/components/mm/SConscript
index d6f78ee06..111da70f8 100644
--- a/components/mm/SConscript
+++ b/components/mm/SConscript
@@ -3,7 +3,7 @@ from building import *
 
 objs = []
 
-if GetDepend('ARCH_MM_MMU'):
+if GetDepend('ARCH_ARM_CORTEX_A') or GetDepend('ARCH_ARMV8') or GetDepend('ARCH_RISCV64'):
     cwd  = GetCurrentDir()
     src	= Glob('*.c') + Glob('*_gcc.S')
     CPPPATH = [cwd]

[wosayttn]

How about that?

import os
from building import *

cwd  = GetCurrentDir()
src = Glob('*.c') + Glob('*_gcc.S')
CPPPATH = [cwd]

group = DefineGroup('mm', src, depend = ['RT_USING_SMART', 'ARCH_MM_MMU'], CPPPATH = CPPPATH)

objs = [group]
list = os.listdir(cwd)

for d in list:
    path = os.path.join(cwd, d)
    if os.path.isfile(os.path.join(path, 'SConscript')):
        objs = objs + SConscript(os.path.join(d, 'SConscript'))

Return('objs')

[polarvid]

for the latest branch

diff --git a/components/mm/SConscript b/components/mm/SConscript
index aee18c27c..725f097c0 100644
--- a/components/mm/SConscript
+++ b/components/mm/SConscript
@@ -3,7 +3,7 @@ from building import *
 
 objs = []
 
-if GetDepend('ARCH_MM_MMU'):
+if GetDepend('ARCH_ARM_CORTEX_A') or GetDepend('ARCH_ARMV8') or GetDepend('ARCH_RISCV64'):
     cwd  = GetCurrentDir()
     src = Glob('*.c') + Glob('*_gcc.S')
     CPPPATH = [cwd]

[polarvid]

How about that?

import os
from building import *

cwd  = GetCurrentDir()
src = Glob('*.c') + Glob('*_gcc.S')
CPPPATH = [cwd]

group = DefineGroup('mm', src, depend = ['RT_USING_SMART', 'ARCH_MM_MMU'], CPPPATH = CPPPATH)

objs = [group]
list = os.listdir(cwd)

for d in list:
    path = os.path.join(cwd, d)
    if os.path.isfile(os.path.join(path, 'SConscript')):
        objs = objs + SConscript(os.path.join(d, 'SConscript'))

Return('objs')

On armv7 armv8 and riscv64, the MM is enabled even without rt smart configured