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Log MMU PTE

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Lee Lup Yuen 2023-11-16 13:03:40 +08:00
parent 222a89dbc5
commit f85e02546d
1 changed files with 12 additions and 7 deletions
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19
README.md
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@ -1932,22 +1932,27 @@ mmu_ln_setentry:
`mmuflags=0x26` means Read + Write + Global
## Map the PLIC (Level 1)
## Map the PLIC (Level 2)
Assuming we add L1 for 0xE000 0000 to access PLIC...
From the [MMU Log](https://gist.github.com/lupyuen/22712d6a2c3a7eb2da1f3cd5c2f4f6cf)...
```text
mmu_ln_map_region:
ptlevel=1, lnvaddr=0x50406000, paddr=0xe0000000, vaddr=0xe0000000, size=0x10000000, mmuflags=0x26
ptlevel=2, lnvaddr=0x50403000, paddr=0xe0000000, vaddr=0xe0000000, size=0x10000000, mmuflags=0x26
mmu_ln_setentry:
ptlevel=1, lnvaddr=0x50406000, paddr=0xe0000000, vaddr=0xe0000000, mmuflags=0x26
mmu_ln_setentry: ptlevel=2, lnvaddr=0x50403000, paddr=0xe0000000, vaddr=0xe0000000, mmuflags=0x26
mmu_ln_setentry: index=0x100, paddr=0xe0000000, mmuflags=0xe7, pte_addr=0x50403800, pte_val=0x380000e7
mmu_ln_setentry: ptlevel=2, lnvaddr=0x50403000, paddr=0xe0200000, vaddr=0xe0200000, mmuflags=0x26
mmu_ln_setentry: index=0x101, paddr=0xe0200000, mmuflags=0xe7, pte_addr=0x50403808, pte_val=0x380800e7
mmu_ln_setentry: ptlevel=2, lnvaddr=0x50403000, paddr=0xe0400000, vaddr=0xe0400000, mmuflags=0x26
mmu_ln_setentry: index=0x102, paddr=0xe0400000, mmuflags=0xe7, pte_addr=0x50403810, pte_val=0x381000e7
...
mmu_ln_setentry: ptlevel=2, lnvaddr=0x50403000, paddr=0xefe00000, vaddr=0xefe00000, mmuflags=0x26
mmu_ln_setentry: index=0x17f, paddr=0xefe00000, mmuflags=0xe7, pte_addr=0x50403bf8, pte_val=0x3bf800e7
```
`mmuflags=0x26` means Read + Write + Global
(This will fail because 0xE000 0000 is misaligned, see below)
## Map the Kernel Text (Levels 2 & 3)
From the [MMU Log](https://gist.github.com/lupyuen/22712d6a2c3a7eb2da1f3cd5c2f4f6cf)...