| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * File created by Kanoj Sarcar 06/06/00. |
| 3 | * Copyright 2000 Silicon Graphics, Inc. |
| 4 | */ |
| 5 | #ifndef __ASM_SN_MAPPED_KERNEL_H |
| 6 | #define __ASM_SN_MAPPED_KERNEL_H |
| 7 | |
| 8 | /* |
| 9 | * Note on how mapped kernels work: the text and data section is |
| 10 | * compiled at cksseg segment (LOADADDR = 0xc001c000), and the |
| 11 | * init/setup/data section gets a 16M virtual address bump in the |
| 12 | * ld.script file (so that tlblo0 and tlblo1 maps the sections). |
| 13 | * The vmlinux.64 section addresses are put in the xkseg range |
| 14 | * using the change-addresses makefile option. Use elfdump -of |
| 15 | * on IRIX to see where the sections go. The Origin loader loads |
| 16 | * the two sections contiguously in physical memory. The loader |
| 17 | * sets the entry point into kernel_entry using a xkphys address, |
| 18 | * but instead of using 0xa800000001160000, it uses the address |
| 19 | * 0xa800000000160000, which is where it physically loaded that |
| 20 | * code. So no jumps can be done before we have switched to using |
| 21 | * cksseg addresses. |
| 22 | */ |
| 23 | #include <linux/config.h> |
| 24 | #include <asm/addrspace.h> |
| 25 | |
| 26 | #ifdef CONFIG_BUILD_ELF64 |
| 27 | #define REP_BASE CAC_BASE |
| 28 | #else |
| 29 | #define REP_BASE CKSEG0 |
| 30 | #endif |
| 31 | |
| 32 | #ifdef CONFIG_MAPPED_KERNEL |
| 33 | |
| 34 | #define MAPPED_ADDR_RO_TO_PHYS(x) (x - REP_BASE) |
| 35 | #define MAPPED_ADDR_RW_TO_PHYS(x) (x - REP_BASE - 16777216) |
| 36 | |
| 37 | #define MAPPED_KERN_RO_PHYSBASE(n) \ |
| 38 | (PLAT_NODE_DATA(n)->kern_vars.kv_ro_baseaddr) |
| 39 | #define MAPPED_KERN_RW_PHYSBASE(n) \ |
| 40 | (PLAT_NODE_DATA(n)->kern_vars.kv_rw_baseaddr) |
| 41 | |
| 42 | #define MAPPED_KERN_RO_TO_PHYS(x) \ |
| 43 | ((unsigned long)MAPPED_ADDR_RO_TO_PHYS(x) | \ |
| 44 | MAPPED_KERN_RO_PHYSBASE(get_compact_nodeid())) |
| 45 | #define MAPPED_KERN_RW_TO_PHYS(x) \ |
| 46 | ((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \ |
| 47 | MAPPED_KERN_RW_PHYSBASE(get_compact_nodeid())) |
| 48 | |
| 49 | #else /* CONFIG_MAPPED_KERNEL */ |
| 50 | |
| 51 | #define MAPPED_KERN_RO_TO_PHYS(x) (x - REP_BASE) |
| 52 | #define MAPPED_KERN_RW_TO_PHYS(x) (x - REP_BASE) |
| 53 | |
| 54 | #endif /* CONFIG_MAPPED_KERNEL */ |
| 55 | |
| 56 | #define MAPPED_KERN_RO_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RO_TO_PHYS(x)) |
| 57 | #define MAPPED_KERN_RW_TO_K0(x) PHYS_TO_K0(MAPPED_KERN_RW_TO_PHYS(x)) |
| 58 | |
| 59 | #endif /* __ASM_SN_MAPPED_KERNEL_H */ |