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add VM_FLAGS constants

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Beau McCartney
2024-10-05 11:17:37 -06:00
parent 7eabb1d744
commit 04ddcc5e64
1 changed files with 49 additions and 0 deletions
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49
core/sys/darwin/mach_darwin.odin
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@@ -316,3 +316,52 @@ KERN_NOT_FOUND : kern_return_t : 56
*/
KERN_RETURN_MAX : kern_return_t : 0x100
// NOTE(beau): VM_FLAGS constants - ported directly
/* Maximum return value allowable
*/
/*
* VM allocation flags:
*
* VM_FLAGS_FIXED
* (really the absence of VM_FLAGS_ANYWHERE)
* Allocate new VM region at the specified virtual address, if possible.
*
* VM_FLAGS_ANYWHERE
* Allocate new VM region anywhere it would fit in the address space.
*
* VM_FLAGS_PURGABLE
* Create a purgable VM object for that new VM region.
*
* VM_FLAGS_4GB_CHUNK
* The new VM region will be chunked up into 4GB sized pieces.
*
* VM_FLAGS_NO_PMAP_CHECK
* (for DEBUG kernel config only, ignored for other configs)
* Do not check that there is no stale pmap mapping for the new VM region.
* This is useful for kernel memory allocations at bootstrap when building
* the initial kernel address space while some memory is already in use.
*
* VM_FLAGS_OVERWRITE
* The new VM region can replace existing VM regions if necessary
* (to be used in combination with VM_FLAGS_FIXED).
*
* VM_FLAGS_NO_CACHE
* Pages brought in to this VM region are placed on the speculative
* queue instead of the active queue. In other words, they are not
* cached so that they will be stolen first if memory runs low.
*/
vm_flags_t :: distinct c.int // NOTE(beau): not in the apple sdk
VM_FLAGS_FIXED : vm_flags_t : 0x00000000
VM_FLAGS_ANYWHERE : vm_flags_t : 0x00000001
VM_FLAGS_PURGABLE : vm_flags_t : 0x00000002
VM_FLAGS_4GB_CHUNK : vm_flags_t : 0x00000004
VM_FLAGS_RANDOM_ADDR : vm_flags_t : 0x00000008
VM_FLAGS_NO_CACHE : vm_flags_t : 0x00000010
VM_FLAGS_RESILIENT_CODESIGN : vm_flags_t : 0x00000020
VM_FLAGS_RESILIENT_MEDIA : vm_flags_t : 0x00000040
VM_FLAGS_PERMANENT : vm_flags_t : 0x00000080
VM_FLAGS_TPRO : vm_flags_t : 0x00001000
VM_FLAGS_OVERWRITE : vm_flags_t : 0x00004000 /* delete any existing mappings first */