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mapped_kernel.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * File created by Kanoj Sarcar 06/06/00. * Copyright 2000 Silicon Graphics, Inc. */ #ifndef __ASM_SN_MAPPED_KERNEL_H #define __ASM_SN_MAPPED_KERNEL_H #include <linux/mmzone.h> /* * Note on how mapped kernels work: the text and data section is * compiled at cksseg segment (LOADADDR = 0xc001c000), and the * init/setup/data section gets a 16M virtual address bump in the * ld.script file (so that tlblo0 and tlblo1 maps the sections). * The vmlinux.64 section addresses are put in the xkseg range * using the change-addresses makefile option. Use elfdump -of * on IRIX to see where the sections go. The Origin loader loads * the two sections contiguously in physical memory. The loader * sets the entry point into kernel_entry using a xkphys address, * but instead of using 0xa800000001160000, it uses the address * 0xa800000000160000, which is where it physically loaded that * code. So no jumps can be done before we have switched to using * cksseg addresses. */ #include <asm/addrspace.h> #define REP_BASE CAC_BASE #ifdef CONFIG_MAPPED_KERNEL #define MAPPED_ADDR_RO_TO_PHYS(x) (x - REP_BASE) #define MAPPED_ADDR_RW_TO_PHYS(x) (x - REP_BASE - 16777216) #define MAPPED_KERN_RO_PHYSBASE(n) (hub_data(n)->kern_vars.kv_ro_baseaddr) #define MAPPED_KERN_RW_PHYSBASE(n) (hub_data(n)->kern_vars.kv_rw_baseaddr) #define MAPPED_KERN_RO_TO_PHYS(x) \ ((unsigned long)MAPPED_ADDR_RO_TO_PHYS(x) | \ MAPPED_KERN_RO_PHYSBASE(get_nasid())) #define MAPPED_KERN_RW_TO_PHYS(x) \ ((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \ MAPPED_KERN_RW_PHYSBASE(get_nasid())) #else /* CONFIG_MAPPED_KERNEL */ #define MAPPED_KERN_RO_TO_PHYS(x) (x - REP_BASE) #define MAPPED_KERN_RW_TO_PHYS(x) (x - REP_BASE) #endif /* CONFIG_MAPPED_KERNEL */ #define MAPPED_KERN_RO_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RO_TO_PHYS(x)) #define MAPPED_KERN_RW_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RW_TO_PHYS(x)) #endif /* __ASM_SN_MAPPED_KERNEL_H */
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