/* 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 = 0 xc001c000 ) , and the
* init / setup / data section gets a 16 M 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 0 xa800000001160000 , it uses the address
* 0 xa800000000160000 , 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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