[linux-2.6-block.git] / arch / um / kernel / skas / tlb.c

/* 
 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
 * Copyright 2003 PathScale, Inc.
 * Licensed under the GPL
 */

#include "linux/stddef.h"
#include "linux/sched.h"
#include "linux/config.h"
#include "linux/mm.h"
#include "asm/page.h"
#include "asm/pgtable.h"
#include "asm/mmu.h"
#include "user_util.h"
#include "mem_user.h"
#include "mem.h"
#include "skas.h"
#include "os.h"
#include "tlb.h"

static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last,
		  int finished, void **flush)
{
	struct host_vm_op *op;
        int i, ret = 0;

        for(i = 0; i <= last && !ret; i++){
		op = &ops[i];
		switch(op->type){
		case MMAP:
			ret = map(&mmu->skas.id, op->u.mmap.addr,
				  op->u.mmap.len, op->u.mmap.r, op->u.mmap.w,
				  op->u.mmap.x, op->u.mmap.fd,
				  op->u.mmap.offset, finished, flush);
			break;
		case MUNMAP:
			ret = unmap(&mmu->skas.id,
				    (void *) op->u.munmap.addr,
				    op->u.munmap.len, finished, flush);
			break;
		case MPROTECT:
			ret = protect(&mmu->skas.id, op->u.mprotect.addr,
				      op->u.mprotect.len, op->u.mprotect.r,
				      op->u.mprotect.w, op->u.mprotect.x,
				      finished, flush);
			break;
		default:
			printk("Unknown op type %d in do_ops\n", op->type);
			break;
		}
	}

	return ret;
}

extern int proc_mm;

static void fix_range(struct mm_struct *mm, unsigned long start_addr,
		      unsigned long end_addr, int force)
{
        if(!proc_mm && (end_addr > CONFIG_STUB_START))
                end_addr = CONFIG_STUB_START;

        fix_range_common(mm, start_addr, end_addr, force, do_ops);
}

void __flush_tlb_one_skas(unsigned long addr)
{
        flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
}

void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start, 
		     unsigned long end)
{
        if(vma->vm_mm == NULL)
                flush_tlb_kernel_range_common(start, end);
        else fix_range(vma->vm_mm, start, end, 0);
}

void flush_tlb_mm_skas(struct mm_struct *mm)
{
	unsigned long end;

	/* Don't bother flushing if this address space is about to be
         * destroyed.
         */
        if(atomic_read(&mm->mm_users) == 0)
                return;

	end = proc_mm ? task_size : CONFIG_STUB_START;
        fix_range(mm, 0, end, 0);
}

void force_flush_all_skas(void)
{
	unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
        fix_range(current->mm, 0, end, 1);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
	3	* Copyright 2003 PathScale, Inc.
	4	* Licensed under the GPL
	5	*/
	6
	7	#include "linux/stddef.h"
	8	#include "linux/sched.h"
d67b569f	9	#include "linux/config.h"
1da177e4 LT	10	#include "linux/mm.h"
	11	#include "asm/page.h"
	12	#include "asm/pgtable.h"
	13	#include "asm/mmu.h"
	14	#include "user_util.h"
	15	#include "mem_user.h"
	16	#include "mem.h"
	17	#include "skas.h"
	18	#include "os.h"
	19	#include "tlb.h"
	20
07bf731e BS	21	static int do_ops(union mm_context mmu, struct host_vm_op ops, int last,
07bf731e BS	22	int finished, void **flush)
1da177e4 LT	23	{
1da177e4 LT	24	struct host_vm_op *op;
07bf731e	25	int i, ret = 0;
1da177e4	26
07bf731e	27	for(i = 0; i <= last && !ret; i++){
1da177e4 LT	28	op = &ops[i];
	29	switch(op->type){
	30	case MMAP:
07bf731e BS	31	ret = map(&mmu->skas.id, op->u.mmap.addr,
	32	op->u.mmap.len, op->u.mmap.r, op->u.mmap.w,
	33	op->u.mmap.x, op->u.mmap.fd,
	34	op->u.mmap.offset, finished, flush);
1da177e4 LT	35	break;
1da177e4 LT	36	case MUNMAP:
07bf731e BS	37	ret = unmap(&mmu->skas.id,
	38	(void *) op->u.munmap.addr,
	39	op->u.munmap.len, finished, flush);
1da177e4 LT	40	break;
1da177e4 LT	41	case MPROTECT:
07bf731e BS	42	ret = protect(&mmu->skas.id, op->u.mprotect.addr,
	43	op->u.mprotect.len, op->u.mprotect.r,
	44	op->u.mprotect.w, op->u.mprotect.x,
	45	finished, flush);
1da177e4 LT	46	break;
	47	default:
	48	printk("Unknown op type %d in do_ops\n", op->type);
	49	break;
	50	}
	51	}
c5600490	52
07bf731e	53	return ret;
1da177e4 LT	54	}
1da177e4 LT	55
d67b569f JD	56	extern int proc_mm;
d67b569f JD	57
1da177e4 LT	58	static void fix_range(struct mm_struct *mm, unsigned long start_addr,
	59	unsigned long end_addr, int force)
	60	{
d67b569f JD	61	if(!proc_mm && (end_addr > CONFIG_STUB_START))
d67b569f JD	62	end_addr = CONFIG_STUB_START;
1da177e4	63
d67b569f	64	fix_range_common(mm, start_addr, end_addr, force, do_ops);
1da177e4 LT	65	}
	66
	67	void __flush_tlb_one_skas(unsigned long addr)
	68	{
	69	flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE);
	70	}
	71
	72	void flush_tlb_range_skas(struct vm_area_struct *vma, unsigned long start,
	73	unsigned long end)
	74	{
	75	if(vma->vm_mm == NULL)
	76	flush_tlb_kernel_range_common(start, end);
	77	else fix_range(vma->vm_mm, start, end, 0);
	78	}
	79
	80	void flush_tlb_mm_skas(struct mm_struct *mm)
	81	{
d67b569f JD	82	unsigned long end;
d67b569f JD	83
1da177e4 LT	84	/* Don't bother flushing if this address space is about to be
	85	* destroyed.
	86	*/
	87	if(atomic_read(&mm->mm_users) == 0)
	88	return;
	89
d67b569f JD	90	end = proc_mm ? task_size : CONFIG_STUB_START;
d67b569f JD	91	fix_range(mm, 0, end, 0);
1da177e4 LT	92	}
	93
	94	void force_flush_all_skas(void)
	95	{
d67b569f JD	96	unsigned long end = proc_mm ? task_size : CONFIG_STUB_START;
d67b569f JD	97	fix_range(current->mm, 0, end, 1);
1da177e4	98	}