56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
|
/* 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 */
|