1384740dcSRalf Baechle /* 2384740dcSRalf Baechle * File created by Kanoj Sarcar 06/06/00. 3384740dcSRalf Baechle * Copyright 2000 Silicon Graphics, Inc. 4384740dcSRalf Baechle */ 5384740dcSRalf Baechle #ifndef __ASM_SN_MAPPED_KERNEL_H 6384740dcSRalf Baechle #define __ASM_SN_MAPPED_KERNEL_H 7384740dcSRalf Baechle 8384740dcSRalf Baechle #include <linux/mmzone.h> 9384740dcSRalf Baechle 10384740dcSRalf Baechle /* 11384740dcSRalf Baechle * Note on how mapped kernels work: the text and data section is 12384740dcSRalf Baechle * compiled at cksseg segment (LOADADDR = 0xc001c000), and the 13384740dcSRalf Baechle * init/setup/data section gets a 16M virtual address bump in the 14384740dcSRalf Baechle * ld.script file (so that tlblo0 and tlblo1 maps the sections). 15384740dcSRalf Baechle * The vmlinux.64 section addresses are put in the xkseg range 16384740dcSRalf Baechle * using the change-addresses makefile option. Use elfdump -of 17384740dcSRalf Baechle * on IRIX to see where the sections go. The Origin loader loads 18384740dcSRalf Baechle * the two sections contiguously in physical memory. The loader 19384740dcSRalf Baechle * sets the entry point into kernel_entry using a xkphys address, 20384740dcSRalf Baechle * but instead of using 0xa800000001160000, it uses the address 21384740dcSRalf Baechle * 0xa800000000160000, which is where it physically loaded that 22384740dcSRalf Baechle * code. So no jumps can be done before we have switched to using 23384740dcSRalf Baechle * cksseg addresses. 24384740dcSRalf Baechle */ 25384740dcSRalf Baechle #include <asm/addrspace.h> 26384740dcSRalf Baechle 27384740dcSRalf Baechle #define REP_BASE CAC_BASE 28384740dcSRalf Baechle 29384740dcSRalf Baechle #ifdef CONFIG_MAPPED_KERNEL 30384740dcSRalf Baechle 31384740dcSRalf Baechle #define MAPPED_ADDR_RO_TO_PHYS(x) (x - REP_BASE) 32384740dcSRalf Baechle #define MAPPED_ADDR_RW_TO_PHYS(x) (x - REP_BASE - 16777216) 33384740dcSRalf Baechle 34384740dcSRalf Baechle #define MAPPED_KERN_RO_PHYSBASE(n) (hub_data(n)->kern_vars.kv_ro_baseaddr) 35384740dcSRalf Baechle #define MAPPED_KERN_RW_PHYSBASE(n) (hub_data(n)->kern_vars.kv_rw_baseaddr) 36384740dcSRalf Baechle 37384740dcSRalf Baechle #define MAPPED_KERN_RO_TO_PHYS(x) \ 38384740dcSRalf Baechle ((unsigned long)MAPPED_ADDR_RO_TO_PHYS(x) | \ 39384740dcSRalf Baechle MAPPED_KERN_RO_PHYSBASE(get_compact_nodeid())) 40384740dcSRalf Baechle #define MAPPED_KERN_RW_TO_PHYS(x) \ 41384740dcSRalf Baechle ((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \ 42384740dcSRalf Baechle MAPPED_KERN_RW_PHYSBASE(get_compact_nodeid())) 43384740dcSRalf Baechle 44384740dcSRalf Baechle #else /* CONFIG_MAPPED_KERNEL */ 45384740dcSRalf Baechle 46384740dcSRalf Baechle #define MAPPED_KERN_RO_TO_PHYS(x) (x - REP_BASE) 47384740dcSRalf Baechle #define MAPPED_KERN_RW_TO_PHYS(x) (x - REP_BASE) 48384740dcSRalf Baechle 49384740dcSRalf Baechle #endif /* CONFIG_MAPPED_KERNEL */ 50384740dcSRalf Baechle 51384740dcSRalf Baechle #define MAPPED_KERN_RO_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RO_TO_PHYS(x)) 52384740dcSRalf Baechle #define MAPPED_KERN_RW_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RW_TO_PHYS(x)) 53384740dcSRalf Baechle 54384740dcSRalf Baechle #endif /* __ASM_SN_MAPPED_KERNEL_H */ 55