| /* |
| * 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_compact_nodeid())) |
| #define MAPPED_KERN_RW_TO_PHYS(x) \ |
| ((unsigned long)MAPPED_ADDR_RW_TO_PHYS(x) | \ |
| MAPPED_KERN_RW_PHYSBASE(get_compact_nodeid())) |
| |
| #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 */ |