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