mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 01:31:44 +00:00
a7f290dad3
This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
180 lines
4.8 KiB
C
180 lines
4.8 KiB
C
#ifndef _PPC_PAGE_H
|
|
#define _PPC_PAGE_H
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/asm-compat.h>
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
|
|
|
|
/*
|
|
* Subtle: this is an int (not an unsigned long) and so it
|
|
* gets extended to 64 bits the way want (i.e. with 1s). -- paulus
|
|
*/
|
|
#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/config.h>
|
|
|
|
/* This must match what is in arch/ppc/Makefile */
|
|
#define PAGE_OFFSET CONFIG_KERNEL_START
|
|
#define KERNELBASE PAGE_OFFSET
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* The basic type of a PTE - 64 bits for those CPUs with > 32 bit
|
|
* physical addressing. For now this just the IBM PPC440.
|
|
*/
|
|
#ifdef CONFIG_PTE_64BIT
|
|
typedef unsigned long long pte_basic_t;
|
|
#define PTE_SHIFT (PAGE_SHIFT - 3) /* 512 ptes per page */
|
|
#define PTE_FMT "%16Lx"
|
|
#else
|
|
typedef unsigned long pte_basic_t;
|
|
#define PTE_SHIFT (PAGE_SHIFT - 2) /* 1024 ptes per page */
|
|
#define PTE_FMT "%.8lx"
|
|
#endif
|
|
|
|
/* align addr on a size boundary - 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 boundary - adjust address up if needed */
|
|
#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
|
|
|
|
|
|
#undef STRICT_MM_TYPECHECKS
|
|
|
|
#ifdef STRICT_MM_TYPECHECKS
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
typedef struct { pte_basic_t pte; } pte_t;
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
typedef struct { unsigned long 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 pte_basic_t pte_t;
|
|
typedef unsigned long pmd_t;
|
|
typedef unsigned long 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
|
|
|
|
struct page;
|
|
extern void clear_pages(void *page, int order);
|
|
static inline void clear_page(void *page) { clear_pages(page, 0); }
|
|
extern void copy_page(void *to, void *from);
|
|
extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
|
|
extern void copy_user_page(void *to, void *from, unsigned long vaddr,
|
|
struct page *pg);
|
|
|
|
#ifndef CONFIG_APUS
|
|
#define PPC_MEMSTART 0
|
|
#define PPC_PGSTART 0
|
|
#define PPC_MEMOFFSET PAGE_OFFSET
|
|
#else
|
|
extern unsigned long ppc_memstart;
|
|
extern unsigned long ppc_pgstart;
|
|
extern unsigned long ppc_memoffset;
|
|
#define PPC_MEMSTART ppc_memstart
|
|
#define PPC_PGSTART ppc_pgstart
|
|
#define PPC_MEMOFFSET ppc_memoffset
|
|
#endif
|
|
|
|
#if defined(CONFIG_APUS) && !defined(MODULE)
|
|
/* map phys->virtual and virtual->phys for RAM pages */
|
|
static inline unsigned long ___pa(unsigned long v)
|
|
{
|
|
unsigned long p;
|
|
asm volatile ("1: addis %0, %1, %2;"
|
|
".section \".vtop_fixup\",\"aw\";"
|
|
".align 1;"
|
|
".long 1b;"
|
|
".previous;"
|
|
: "=r" (p)
|
|
: "b" (v), "K" (((-PAGE_OFFSET) >> 16) & 0xffff));
|
|
|
|
return p;
|
|
}
|
|
static inline void* ___va(unsigned long p)
|
|
{
|
|
unsigned long v;
|
|
asm volatile ("1: addis %0, %1, %2;"
|
|
".section \".ptov_fixup\",\"aw\";"
|
|
".align 1;"
|
|
".long 1b;"
|
|
".previous;"
|
|
: "=r" (v)
|
|
: "b" (p), "K" (((PAGE_OFFSET) >> 16) & 0xffff));
|
|
|
|
return (void*) v;
|
|
}
|
|
#else
|
|
#define ___pa(vaddr) ((vaddr)-PPC_MEMOFFSET)
|
|
#define ___va(paddr) ((paddr)+PPC_MEMOFFSET)
|
|
#endif
|
|
|
|
extern int page_is_ram(unsigned long pfn);
|
|
|
|
#define __pa(x) ___pa((unsigned long)(x))
|
|
#define __va(x) ((void *)(___va((unsigned long)(x))))
|
|
|
|
#define pfn_to_page(pfn) (mem_map + ((pfn) - PPC_PGSTART))
|
|
#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PPC_PGSTART)
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
|
|
|
|
#define pfn_valid(pfn) (((pfn) - PPC_PGSTART) < max_mapnr)
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
/* Pure 2^n version of get_order */
|
|
extern __inline__ int get_order(unsigned long size)
|
|
{
|
|
int lz;
|
|
|
|
size = (size-1) >> PAGE_SHIFT;
|
|
asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
|
|
return 32 - lz;
|
|
}
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
/* We do define AT_SYSINFO_EHDR but don't use the gate mecanism */
|
|
#define __HAVE_ARCH_GATE_AREA 1
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _PPC_PAGE_H */
|