ggml-cpu: Add IME2 Instruction Support for the SpacemiT Backend (#22863)

ggml/src/ggml-cpu/spacemit/spine_mem_pool.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+
+namespace ggml::cpu::riscv64_spacemit {
+
+enum class spine_mem_pool_backend : uint8_t {
+    none,
+    posix_memalign,
+    transparent_hugepage,
+    hugetlb_1g,
+};
+
+struct spine_mem_pool_tcm_info {
+    bool   available{ false };
+    size_t blk_size{ 0 };
+    size_t blk_num{ 0 };
+    bool   is_fake_tcm{ false };
+};
+
+bool   spine_mem_pool_tcm_init(spine_mem_pool_tcm_info * info) noexcept;
+void * spine_mem_pool_tcm_mem_get(int cpu_id) noexcept;
+void * spine_mem_pool_tcm_mem_wait(int cpu_id) noexcept;
+int    spine_mem_pool_tcm_mem_release(int cpu_id) noexcept;
+
+void * spine_mem_pool_alloc(size_t size, size_t alignment) noexcept;
+void * spine_mem_pool_shared_mem_alloc(size_t size, size_t alignment) noexcept;
+void   spine_mem_pool_free(void * base) noexcept;
+void   spine_mem_pool_shared_mem_free(void * base) noexcept;
+
+}  // namespace ggml::cpu::riscv64_spacemit