90 lines
2.2 KiB
Plaintext
90 lines
2.2 KiB
Plaintext
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---
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title: pmap_bootstrap
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---
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flowchart TD
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R_BEGIN("Begin")
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R_GETMMAP["Get Memory Map entry"]
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R_MMAP_LAST{"Last Item ?"}
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R_END("End")
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subgraph "entry to pmap_block"
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C_BEGIN("Begin Proc")
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C_IS_FREE{"Is
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entry free?"}
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C_END("End Proc")
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C_OVERLAP_KERNEL{"entry
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overlap
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kernel?"}
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C_REMOVE_KRESERVED["Remove Kernel
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Memory from entry"]
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C_MEMORY_SIZE_EXCEED{"Is entry size
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larger than
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0x0x7f80000 ?"}
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C_MEMORY_SPLIT["Split entry"]
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C_MEMORY_LAST["Is last ?"]
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C_BEGIN-->C_IS_FREE
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C_IS_FREE--No-->C_END
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C_IS_FREE--Yes-->C_OVERLAP_KERNEL
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C_OVERLAP_KERNEL--Yes-->C_REMOVE_KRESERVED
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C_REMOVE_KRESERVED-->C_MEMORY_SIZE_EXCEED
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C_OVERLAP_KERNEL--No-->C_MEMORY_SIZE_EXCEED
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C_MEMORY_SIZE_EXCEED--Yes-->C_MEMORY_SPLIT
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C_MEMORY_SPLIT-->C_MEMORY_LAST
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C_MEMORY_LAST--Yes-->C_END
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end
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subgraph "create & store pmap_block"
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D_BEGIN("Begin Proc")
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D_BOOSTRAP_EXIST{"Bootstrap
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pmap_block
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exist?"}
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D_SETUP_BOOTSTRAP["Setup bootstrap pmap"]
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D_END("End Proc")
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D_SET_HEAD_BOOTSTRAP["Set bootstrap as Head"]
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D_SEARCH_FREE_PAGE["Search free page in Head->bitmap"]
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D_FREE_PAGE_FOUND{"Free Page found ?"}
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D_HEAD_NEXT_NULL{"Head->next == NULL?"}
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D_HEAD_NEXT["Set Head to Head->next"]
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D_CREATE_PMAP["Create new pmap_block
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in free page"]
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D_APPEND_PMAP["Append pmap_block
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at end of
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linked list"]
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D_BEGIN-->D_BOOSTRAP_EXIST
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D_BOOSTRAP_EXIST--No-->D_SETUP_BOOTSTRAP
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D_SETUP_BOOTSTRAP-->D_END
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D_BOOSTRAP_EXIST--Yes-->D_SET_HEAD_BOOTSTRAP
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D_SET_HEAD_BOOTSTRAP-->D_SEARCH_FREE_PAGE
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D_SEARCH_FREE_PAGE-->D_FREE_PAGE_FOUND
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D_FREE_PAGE_FOUND--No-->D_HEAD_NEXT_NULL
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D_HEAD_NEXT_NULL--No-->D_HEAD_NEXT
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D_HEAD_NEXT-->D_SEARCH_FREE_PAGE
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D_FREE_PAGE_FOUND--Yes-->D_CREATE_PMAP
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D_CREATE_PMAP-->D_APPEND_PMAP
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D_APPEND_PMAP-->D_END
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end
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R_BEGIN-->R_GETMMAP
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R_GETMMAP-->R_MMAP_LAST
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R_MMAP_LAST--Yes-->R_END
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R_MMAP_LAST--No-->C_BEGIN
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C_MEMORY_SIZE_EXCEED--No-->D_BEGIN
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D_END--Try get next-->C_MEMORY_LAST
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C_MEMORY_LAST--No-->D_BEGIN
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C_END--Try get next entry-->R_MMAP_LAST
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style R_BEGIN fill:#6CA300
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style R_END fill:#A30000
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style C_BEGIN fill:#6CA300
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style C_END fill:#A30000
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style D_BEGIN fill:#6CA300
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style D_END fill:#A30000
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