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Log MMU PTE

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Lee Lup Yuen 2023-11-13 19:19:18 +08:00
parent cdeeb779b0
commit 644926d0a2
1 changed files with 27 additions and 16 deletions
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@ -2184,7 +2184,7 @@ To compute the Value of Level 2 PTE:
- ppn = paddr >> 12 = 0xe0000
(12 bits per Memory Page)
(4096 bytes per Memory Page)
To compute the Address of Level 2 PTE:
@ -2192,17 +2192,13 @@ To compute the Address of Level 2 PTE:
(8 bytes per PTE)
- index = vpn[0 to 1] >> 9 = 0x100
- index = (vpn >> 9) & 0b111111111 = 0x100
(9 bits for Level 1)
- vpn[0 to 1] = vpn & 0b111111111111111111 = 0x20000
(Extract the last 18 bits to get Level 2 and 3)
(Extract Bits 9 to 17 to get Level 2 Index)
- vpn = vaddr >> 12 = 0xe0000
(12 bits per Memory Page)
(4096 bytes per Memory Page)
__Compute Level 1 PTE:__
@ -2228,7 +2224,7 @@ To compute the Value of Level 1 PTE:
- ppn = paddr >> 12 = 0x50403
(12 bits per Memory Page)
(1<<12 bits per Memory Page)
To compute the Address of Level 1 PTE:
@ -2236,17 +2232,32 @@ To compute the Address of Level 1 PTE:
(8 bytes per PTE)
- index = vpn[3] = 3
- index = vpn >> 18 = 3
(???)
- vpn[2] = vpn >> 18 = 3
(Skip the last 18 bits for Level 2 and 3)
(Extract Bits 18 to 26 to get Level 1 Index)
- vpn = vaddr >> 12 = 0xe0000
(12 bits per Memory Page)
(4096 bytes per Memory Page)
__Compute Level 3 PTE:__
```text
map kernel text
mmu_ln_setentry:
ptlevel=2, lnvaddr=0x50406000, paddr=0x50404000, vaddr=0x50200000, mmuflags=0x0
mmu_ln_setentry:
index=0x81, paddr=0x50404000, mmuflags=0x1, pte_addr=0x50406408, pte_val=0x14101001
mmu_ln_setentry:
ptlevel=3, lnvaddr=0x50404000, paddr=0x50200000, vaddr=0x50200000, mmuflags=0x2a
mmu_ln_setentry:
index=0,
paddr=0x50200000,
mmuflags=0xeb,
pte_addr=0x50404000,
pte_val=0x140800eb
```
TODO