1 /* 2 * File created by Kanoj Sarcar 06/06/00. 3 * Copyright 2000 Silicon Graphics, Inc. 4 */ 5 #ifndef __ASM_SN_MAPPED_KERNEL_H 6 #define __ASM_SN_MAPPED_KERNEL_H 7 8 #include <linux/mmzone.h> 9 10 /* 11 * Note on how mapped kernels work: the text and data section is 12 * compiled at cksseg segment (LOADADDR = 0xc001c000), and the 13 * init/setup/data section gets a 16M virtual address bump in the 14 * ld.script file (so that tlblo0 and tlblo1 maps the sections). 15 * The vmlinux.64 section addresses are put in the xkseg range 16 * using the change-addresses makefile option. Use elfdump -of 17 * on IRIX to see where the sections go. The Origin loader loads 18 * the two sections contiguously in physical memory. The loader 19 * sets the entry point into kernel_entry using a xkphys address, 20 * but instead of using 0xa800000001160000, it uses the address 21 * 0xa800000000160000, which is where it physically loaded that 22 * code. So no jumps can be done before we have switched to using 23 * cksseg addresses. 24 */ 25 #include <asm/addrspace.h> 26 27 #define REP_BASE CAC_BASE 28 29 #ifdef CONFIG_MAPPED_KERNEL 30 31 #define MAPPED_ADDR_RO_TO_PHYS(x) (x - REP_BASE) 32 #define MAPPED_ADDR_RW_TO_PHYS(x) (x - REP_BASE - 16777216) 33 34 #define MAPPED_KERN_RO_PHYSBASE(n) (hub_data(n)->kern_vars.kv_ro_baseaddr) 35 #define MAPPED_KERN_RW_PHYSBASE(n) (hub_data(n)->kern_vars.kv_rw_baseaddr) 36 37 #define MAPPED_KERN_RO_TO_PHYS(x) \ 38 ((unsigned long)MAPPED_ADDR_RO_TO_PHYS(x) | \ 39 MAPPED_KERN_RO_PHYSBASE(get_compact_nodeid())) 40 #define MAPPED_KERN_RW_TO_PHYS(x) \ 41 ((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \ 42 MAPPED_KERN_RW_PHYSBASE(get_compact_nodeid())) 43 44 #else /* CONFIG_MAPPED_KERNEL */ 45 46 #define MAPPED_KERN_RO_TO_PHYS(x) (x - REP_BASE) 47 #define MAPPED_KERN_RW_TO_PHYS(x) (x - REP_BASE) 48 49 #endif /* CONFIG_MAPPED_KERNEL */ 50 51 #define MAPPED_KERN_RO_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RO_TO_PHYS(x)) 52 #define MAPPED_KERN_RW_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RW_TO_PHYS(x)) 53 54 #endif /* __ASM_SN_MAPPED_KERNEL_H */ 55