Implement buddy system (still in draft)#420
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runnable, with many logs, tests not checked yet runnable platform: 1.qemu_virt64_aarch64 --- fix bugs: 1.multiple DRAM_BASE : kernel/src/boards/qemu_virt64_aarch64/mod.rs 2.multiple instances of BUDDY_ALLOC : kernel/src/allocator/mod.rs 3.use PHYS_DRAM_SIZE when link.x links all symbols with linearmap offset 4.buddy init code ignore kernel image part in memory layout 5.metadata_end's calculation should sub linearmap_offset first 6.buddy init code set zero [mem_start, page_array_size] directly, ignore kernel image part --- modified: kernel/src/allocator/Kconfig kernel/src/allocator/buddy/heap.rs kernel/src/allocator/buddy/mod.rs kernel/src/allocator/buddy/page.rs kernel/src/allocator/buddy/tests.rs kernel/src/allocator/mod.rs kernel/src/boards/qemu_virt64_aarch64/config.rs : define DRAM_SIZE kernel/src/boards/qemu_virt64_aarch64/link.x : LENGTH = 125.5M, increase linearmap region size from 32M to 125.5M kernel/src/boards/qemu_virt64_aarch64/mod.rs : pub use DRAM_SIZE
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Implement buddy system (still in draft)