feat: buddy-page & test

api/axfeat/Cargo.toml

@@ -31,6 +31,7 @@ page-alloc-4g = ["axalloc/page-alloc-4g"] # up to 4G memory capacity
 paging = ["alloc", "axhal/paging", "axruntime/paging"]
 tls = ["alloc", "axhal/tls", "axruntime/tls", "axtask?/tls"]
 dma = ["alloc", "paging"]
+page-alloc-buddy = ["axalloc/buddy-page"] 
 
 # Multi-threading and scheduler
 multitask = ["alloc", "axtask/multitask", "axsync/multitask", "axruntime/multitask"]

modules/axalloc/Cargo.toml

@@ -16,6 +16,7 @@ slab = ["allocator/slab"]
 buddy = ["allocator/buddy"]
 page-alloc-64g = ["allocator/page-alloc-64g"] # Support up to 64G memory capacity
 page-alloc-4g = ["allocator/page-alloc-4g"] # Support up to 4G memory capacity
+buddy-page = []
 
 [dependencies]
 log = "=0.4.21"