#ifndef _PPC64_PAGE_H #define _PPC64_PAGE_H /* * Copyright (C) 2001 PPC64 Team, IBM Corp * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 12 #ifndef __ASSEMBLY__ #define PAGE_SIZE (1UL << PAGE_SHIFT) #else # define PAGE_SIZE (1 << PAGE_SHIFT) #endif #define PAGE_MASK (~(PAGE_SIZE-1)) #define PAGE_OFFSET_MASK (PAGE_SIZE-1) #define SID_SHIFT 28 #define SID_MASK 0xfffffffff #define GET_ESID(x) (((x) >> SID_SHIFT) & SID_MASK) /* Define an illegal instr to trap on the bug. * We don't use 0 because that marks the end of a function * in the ELF ABI. That's "Boo Boo" in case you wonder... */ #define BUG_OPCODE .long 0x00b00b00 /* For asm */ #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */ #ifdef __KERNEL__ #ifndef __ASSEMBLY__ #include #include #define STRICT_MM_TYPECHECKS #define REGION_SIZE 4UL #define OFFSET_SIZE 60UL #define REGION_SHIFT 60UL #define OFFSET_SHIFT 0UL #define REGION_MASK (((1UL<dCacheL1LineSize; lines = naca->dCacheL1LinesPerPage; __asm__ __volatile__( " mtctr %1\n\ 1: dcbz 0,%0\n\ add %0,%0,%3\n\ bdnz+ 1b" : "=r" (addr) : "r" (lines), "0" (addr), "r" (line_size) : "ctr", "memory"); } extern void copy_page(void *to, void *from); struct page; extern void clear_user_page(void *page, unsigned long vaddr); extern void copy_user_page(void *to, void *from, unsigned long vaddr); #ifdef STRICT_MM_TYPECHECKS /* * These are used to make use of C type-checking. * Entries in the pte table are 64b, while entries in the pgd & pmd are 32b. */ typedef struct { unsigned long pte; } pte_t; typedef struct { unsigned int pmd; } pmd_t; typedef struct { unsigned int pgd; } pgd_t; typedef struct { unsigned long pgprot; } pgprot_t; #define pte_val(x) ((x).pte) #define pmd_val(x) ((x).pmd) #define pgd_val(x) ((x).pgd) #define pgprot_val(x) ((x).pgprot) #define __pte(x) ((pte_t) { (x) } ) #define __pmd(x) ((pmd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } ) #else /* * .. while these make it easier on the compiler */ typedef unsigned long pte_t; typedef unsigned int pmd_t; typedef unsigned int pgd_t; typedef unsigned long pgprot_t; #define pte_val(x) (x) #define pmd_val(x) (x) #define pgd_val(x) (x) #define pgprot_val(x) (x) #define __pte(x) (x) #define __pmd(x) (x) #define __pgd(x) (x) #define __pgprot(x) (x) #endif #ifdef CONFIG_XMON #include extern void xmon(struct pt_regs *excp); #define BUG() do { \ printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ xmon(0); \ } while (0) #else #define BUG() do { \ printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ } while (0) #endif #define PAGE_BUG(page) do { BUG(); } while (0) /* Pure 2^n version of get_order */ static inline int get_order(unsigned long size) { int order; size = (size-1) >> (PAGE_SHIFT-1); order = -1; do { size >>= 1; order++; } while (size); return order; } #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) #endif /* __ASSEMBLY__ */ /* align addr on a size boundry - adjust address up/down if needed */ #define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1))) #define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1))) /* align addr on a size boundry - adjust address up if needed */ #define _ALIGN(addr,size) _ALIGN_UP(addr,size) /* to align the pointer to the (next) double word boundary */ #define DOUBLEWORD_ALIGN(addr) _ALIGN(addr,sizeof(unsigned long)) /* to align the pointer to the (next) page boundary */ #define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE) #ifdef MODULE #define __page_aligned __attribute__((__aligned__(PAGE_SIZE))) #else #define __page_aligned \ __attribute__((__aligned__(PAGE_SIZE), \ __section__(".data.page_aligned"))) #endif /* This must match the -Ttext linker address */ /* Note: tophys & tovirt make assumptions about how */ /* KERNELBASE is defined for performance reasons. */ /* When KERNELBASE moves, those macros may have */ /* to change! */ #define PAGE_OFFSET 0xC000000000000000 #define KERNELBASE PAGE_OFFSET #define VMALLOCBASE 0xD000000000000000 #define IOREGIONBASE 0xE000000000000000 #define EEHREGIONBASE 0xA000000000000000 #define BOLTEDBASE 0xB000000000000000 #define IO_REGION_ID (IOREGIONBASE>>REGION_SHIFT) #define EEH_REGION_ID (EEHREGIONBASE>>REGION_SHIFT) #define VMALLOC_REGION_ID (VMALLOCBASE>>REGION_SHIFT) #define KERNEL_REGION_ID (KERNELBASE>>REGION_SHIFT) #define BOLTED_REGION_ID (BOLTEDBASE>>REGION_SHIFT) #define USER_REGION_ID (0UL) #define REGION_ID(X) (((unsigned long)(X))>>REGION_SHIFT) /* * Define valid/invalid EA bits (for all ranges) */ #define VALID_EA_BITS (0x000001ffffffffffUL) #define INVALID_EA_BITS (~(REGION_MASK|VALID_EA_BITS)) #define IS_VALID_REGION_ID(x) \ (((x) == USER_REGION_ID) || ((x) >= BOLTED_REGION_ID)) #define IS_VALID_EA(x) \ ((!((x) & INVALID_EA_BITS)) && IS_VALID_REGION_ID(REGION_ID(x))) #define __bpn_to_ba(x) ((((unsigned long)(x))<> PAGE_SHIFT) #define __va(x) ((void *)((unsigned long)(x) + KERNELBASE)) /* Given that physical addresses do not map 1-1 to absolute addresses, we * use these macros to better specify exactly what we want to do. * The only restriction on their use is that the absolute address * macros cannot be used until after the LMB structure has been * initialized in prom.c. -Peter */ #define __v2p(x) ((void *) __pa(x)) #define __v2a(x) ((void *) phys_to_absolute(__pa(x))) #define __p2a(x) ((void *) phys_to_absolute(x)) #define __p2v(x) ((void *) __va(x)) #define __a2p(x) ((void *) absolute_to_phys(x)) #define __a2v(x) ((void *) __va(absolute_to_phys(x))) #define virt_to_page(kaddr) (mem_map+(__pa((unsigned long)kaddr) >> PAGE_SHIFT)) #define VALID_PAGE(page) ((page - mem_map) < max_mapnr) #define MAP_NR(addr) (__pa(addr) >> PAGE_SHIFT) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #endif /* __KERNEL__ */ #endif /* _PPC64_PAGE_H */