tile: add arch-tile.h

new file mode 100644
index 0000000..785b236
@@ -0,0 +1,25 @@
+#pragma once
+
+#ifdef __tilegx__
+
+#define MAX_VA_WIDTH   42
+#define MAX_PA_WIDTH   40
+
+#define PAGE_OFFSET            (-(1 << (MAX_VA_WIDTH - 1)))
+#define KERNEL_HIGH_VADDR       0xfffffff800000000  /* high 32GB */
+#define MEM_SV_START            (KERNEL_HIGH_VADDR - 0x100000000) /* 256 MB */
+#define MEM_MODULE_START        (MEM_SV_START + (256*1024*1024)) /* 256 MB */
+#define MEM_MODULE_END          (MEM_MODULE_START + (256*1024*1024))
+#define KERNEL_ADDR            MEM_SV_START
+#define MODULE_ADDR            MEM_MODULE_START
+
+#define TASK_SIZE_MAX           (1 << (MAX_VA_WIDTH - 1))
+#define TASK_SIZE               TASK_SIZE_MAX
+
+#define PAGE_SHIFT     16
+#define PTE_FILE_MAX_BITS 32
+#define BITS_PER_LONG  64
+
+#endif
+
+#define SYSCALLS syscalls_tile