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Lee Lup Yuen 2023-11-16 20:39:56 +08:00
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@ -1932,6 +1932,8 @@ mmu_ln_setentry:
`mmuflags=0x26` means Read + Write + Global
![Level 1 Page Table for Kernel](https://lupyuen.github.io/images/mmu-l1kernel2.jpg)
## Map the PLIC (Level 2)
From the [MMU Log](https://gist.github.com/lupyuen/22712d6a2c3a7eb2da1f3cd5c2f4f6cf)...
@ -1953,6 +1955,8 @@ mmu_ln_setentry: index=0x17f, paddr=0xefe00000, mmuflags=0xe7, pte_addr=0x50403b
`mmuflags=0x26` means Read + Write + Global
![Level 2 Page Table for Interrupt Controller](https://lupyuen.github.io/images/mmu-l2int.jpg)
## Connect the Level 1 and Level 2 Page Tables for PLIC
From the [MMU Log](https://gist.github.com/lupyuen/22712d6a2c3a7eb2da1f3cd5c2f4f6cf)...
@ -1967,6 +1971,8 @@ mmu_ln_setentry:
`mmuflags=0x20` means PTE_G: Global Mapping.
![Level 1 Page Table for Kernel](https://lupyuen.github.io/images/mmu-l1kernel.jpg)
## Map the Kernel Text (Levels 2 & 3)
From the [MMU Log](https://gist.github.com/lupyuen/22712d6a2c3a7eb2da1f3cd5c2f4f6cf)...
@ -1994,6 +2000,8 @@ mmu_ln_setentry: index=0x1ff, paddr=0x503ff000, mmuflags=0xeb, pte_addr=0x50404f
`mmuflags=0x2a` means Read + Execute + Global
![Level 3 Page Table for Kernel](https://lupyuen.github.io/images/mmu-l3kernel.jpg)
## Map the Kernel Data (Levels 2 & 3)
From the [MMU Log](https://gist.github.com/lupyuen/22712d6a2c3a7eb2da1f3cd5c2f4f6cf)...
@ -2059,6 +2067,8 @@ mmu_ln_setentry: index=0x8c, paddr=0x51800000, mmuflags=0xe7, pte_addr=0x5040646
`mmuflags=0x26` means Read + Write + Global
![Level 2 Page Table for Kernel](https://lupyuen.github.io/images/mmu-l2kernel.jpg)
## Map the User Code, Data and Heap (Levels 1, 2, 3)
From the [MMU Log](https://gist.github.com/lupyuen/22712d6a2c3a7eb2da1f3cd5c2f4f6cf)...
@ -2114,6 +2124,12 @@ mmu_ln_setentry: ptlevel=3, lnvaddr=0x5061b000, paddr=0x5069c000, vaddr=0x802800
mmu_ln_setentry: index=0x80, paddr=0x5069c000, mmuflags=0xd7, pte_addr=0x5061b400, pte_val=0x141a70d7
```
![Level 1 Page Table for User](https://lupyuen.github.io/images/mmu-l1user.jpg)
![Level 2 Page Table for User](https://lupyuen.github.io/images/mmu-l2user.jpg)
![Level 3 Page Table for User](https://lupyuen.github.io/images/mmu-l3user.jpg)
## Page Tables
_What are the 3 Levels of Page Tables?_