tools/include: Add mm.h file

Add a stubbed mm.h file with dummy page-related definitions,
memory alignment and physical to virtual address conversions,
so they can be used in testing.

Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@kernel.org>
Link: https://lore.kernel.org/r/e8b83d96fec95f3556e80f001d9d5cbe18b8ad5f.1643796665.git.karolinadrobnik@gmail.com

diff --git a/tools/include/linux/mm.h b/tools/include/linux/mm.h
new file mode 100644 (file)
index 0000000..a03d9bb
--- /dev/null
+++ b/tools/include/linux/mm.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _TOOLS_LINUX_MM_H
+#define _TOOLS_LINUX_MM_H
+
+#include <linux/mmzone.h>
+#include <uapi/linux/const.h>
+
+#define PAGE_SHIFT             12
+#define PAGE_SIZE              (_AC(1, UL) << PAGE_SHIFT)
+#define PAGE_MASK              (~(PAGE_SIZE - 1))
+
+#define PHYS_ADDR_MAX  (~(phys_addr_t)0)
+
+#define __ALIGN_KERNEL(x, a)           __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
+#define __ALIGN_KERNEL_MASK(x, mask)   (((x) + (mask)) & ~(mask))
+#define ALIGN(x, a)                    __ALIGN_KERNEL((x), (a))
+#define ALIGN_DOWN(x, a)               __ALIGN_KERNEL((x) - ((a) - 1), (a))
+
+#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
+
+#define __va(x) ((void *)((unsigned long)(x)))
+#define __pa(x) ((unsigned long)(x))
+
+#define pfn_to_page(pfn) ((void *)((pfn) * PAGE_SIZE))
+
+#define phys_to_virt phys_to_virt
+static inline void *phys_to_virt(unsigned long address)
+{
+       return __va(address);
+}
+
+void reserve_bootmem_region(phys_addr_t start, phys_addr_t end);
+
+static inline void totalram_pages_inc(void)
+{
+}
+
+static inline void totalram_pages_add(long count)
+{
+}
+
+#endif