arch/m68k/include/asm/page_offset.h - arm/linux-arm64-legacy - Git at Google

 /* This handles the memory map.. */

 #if defined(CONFIG_RAMBASE)
 #define PAGE_OFFSET_RAW		CONFIG_RAMBASE
 #elif defined(CONFIG_SUN3)
 #define PAGE_OFFSET_RAW		0x0E000000
 #else
 #define PAGE_OFFSET_RAW		0x00000000
 #endif
	/* This handles the memory map.. */

	#if defined(CONFIG_RAMBASE)
	#define PAGE_OFFSET_RAW CONFIG_RAMBASE
	#elif defined(CONFIG_SUN3)
	#define PAGE_OFFSET_RAW 0x0E000000
	#else
	#define PAGE_OFFSET_RAW 0x00000000
	#endif