| #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 <linux/config.h> |
| |
| /* 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 <asm/naca.h> |
| #include <asm/systemcfg.h> |
| |
| #define STRICT_MM_TYPECHECKS |
| |
| #define REGION_SIZE 4UL |
| #define OFFSET_SIZE 60UL |
| #define REGION_SHIFT 60UL |
| #define OFFSET_SHIFT 0UL |
| #define REGION_MASK (((1UL<<REGION_SIZE)-1UL)<<REGION_SHIFT) |
| #define REGION_STRIDE (1UL << REGION_SHIFT) |
| |
| #ifdef ___powerpc64__ |
| typedef union ppc64_va { |
| struct { |
| unsigned long off : OFFSET_SIZE; /* intra-region offset */ |
| unsigned long reg : REGION_SIZE; /* region number */ |
| } f; |
| unsigned long l; |
| void *p; |
| } ppc64_va; |
| #endif /* ___powerpc64__ */ |
| |
| static __inline__ void clear_page(void *addr) |
| { |
| unsigned long lines, line_size; |
| |
| line_size = systemcfg->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 <asm/ptrace.h> |
| 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) + KERNELBASE) |
| #define __ba_to_bpn(x) ((((unsigned long)(x)) & ~REGION_MASK) >> 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 */ |