| 1 | /* |
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| 2 | * File created by Kanoj Sarcar 06/06/00. |
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| 3 | * Copyright 2000 Silicon Graphics, Inc. |
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| 4 | */ |
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| 5 | #ifndef __ASM_SN_MAPPED_KERNEL_H |
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| 6 | #define __ASM_SN_MAPPED_KERNEL_H |
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| 7 | |
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| 8 | /* |
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| 9 | * Note on how mapped kernels work: the text and data section is |
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| 10 | * compiled at cksseg segment (LOADADDR = 0xc001c000), and the |
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| 11 | * init/setup/data section gets a 16M virtual address bump in the |
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| 12 | * ld.script file (so that tlblo0 and tlblo1 maps the sections). |
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| 13 | * The vmlinux.64 section addresses are put in the xkseg range |
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| 14 | * using the change-addresses makefile option. Use elfdump -of |
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| 15 | * on IRIX to see where the sections go. The Origin loader loads |
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| 16 | * the two sections contiguously in physical memory. The loader |
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| 17 | * sets the entry point into kernel_entry using a xkphys address, |
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| 18 | * but instead of using 0xa800000001160000, it uses the address |
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| 19 | * 0xa800000000160000, which is where it physically loaded that |
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| 20 | * code. So no jumps can be done before we have switched to using |
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| 21 | * cksseg addresses. |
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| 22 | */ |
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| 23 | #include <asm/addrspace.h> |
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| 24 | |
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| 25 | #ifdef CONFIG_BUILD_ELF64 |
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| 26 | #define REP_BASE CAC_BASE |
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| 27 | #else |
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| 28 | #define REP_BASE CKSEG0 |
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| 29 | #endif |
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| 30 | |
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| 31 | #ifdef CONFIG_MAPPED_KERNEL |
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| 32 | |
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| 33 | #define MAPPED_ADDR_RO_TO_PHYS(x) (x - REP_BASE) |
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| 34 | #define MAPPED_ADDR_RW_TO_PHYS(x) (x - REP_BASE - 16777216) |
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| 35 | |
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| 36 | #define MAPPED_KERN_RO_PHYSBASE(n) \ |
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| 37 | (PLAT_NODE_DATA(n)->kern_vars.kv_ro_baseaddr) |
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| 38 | #define MAPPED_KERN_RW_PHYSBASE(n) \ |
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| 39 | (PLAT_NODE_DATA(n)->kern_vars.kv_rw_baseaddr) |
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| 40 | |
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| 41 | #define MAPPED_KERN_RO_TO_PHYS(x) \ |
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| 42 | ((unsigned long)MAPPED_ADDR_RO_TO_PHYS(x) | \ |
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| 43 | MAPPED_KERN_RO_PHYSBASE(get_compact_nodeid())) |
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| 44 | #define MAPPED_KERN_RW_TO_PHYS(x) \ |
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| 45 | ((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \ |
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| 46 | MAPPED_KERN_RW_PHYSBASE(get_compact_nodeid())) |
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| 47 | |
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| 48 | #else /* CONFIG_MAPPED_KERNEL */ |
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| 49 | |
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| 50 | #define MAPPED_KERN_RO_TO_PHYS(x) (x - REP_BASE) |
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| 51 | #define MAPPED_KERN_RW_TO_PHYS(x) (x - REP_BASE) |
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| 52 | |
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| 53 | #endif /* CONFIG_MAPPED_KERNEL */ |
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| 54 | |
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| 55 | #define MAPPED_KERN_RO_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RO_TO_PHYS(x)) |
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| 56 | #define MAPPED_KERN_RW_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RW_TO_PHYS(x)) |
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| 57 | |
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| 58 | #endif /* __ASM_SN_MAPPED_KERNEL_H */ |
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