mapped_kernel.h
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上传日期:2013-02-24
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- /*
- * 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
- /*
- * 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 <linux/config.h>
- #include <asm/addrspace.h>
- #ifdef CONFIG_MAPPED_KERNEL
- #define MAPPED_ADDR_RO_TO_PHYS(x) (x - CKSSEG)
- #define MAPPED_ADDR_RW_TO_PHYS(x) (x - CKSSEG - 16777216)
- #define MAPPED_KERN_RO_PHYSBASE(n)
- (PLAT_NODE_DATA(n)->kern_vars.kv_ro_baseaddr)
- #define MAPPED_KERN_RW_PHYSBASE(n)
- (PLAT_NODE_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()))
- #define MAPPED_OFFSET 16777216
- #else /* CONFIG_MAPPED_KERNEL */
- #define MAPPED_KERN_RO_TO_PHYS(x) (x - CKSEG0)
- #define MAPPED_KERN_RW_TO_PHYS(x) (x - CKSEG0)
- #define MAPPED_OFFSET 0
- #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 */