Subversion Repositories c0or1k

/*

 * ARM virtual memory implementation

 *

 * Copyright (C) 2007 Bahadir Balban

 */

#include <l4/lib/list.h>

#include <l4/lib/string.h>

#include <l4/lib/printk.h>

#include <l4/generic/space.h>

#include <l4/generic/tcb.h>

#include <l4/generic/platform.h>

#include INC_SUBARCH(mm.h)

#include INC_GLUE(memlayout.h)

#include INC_GLUE(memory.h)

#include INC_GLUE(mapping.h)

#include INC_PLAT(offsets.h)

#include INC_ARCH(linker.h)

#include INC_ARCH(asm.h)

/*

 * Return arch-specific pte flags from generic space flags.

 */

unsigned int space_flags_to_ptflags(unsigned int flags)

{

        switch (flags) {

        case MAP_FAULT:

                return __MAP_FAULT;

        case MAP_USR_RW:

                return __MAP_USR_RW;

        case MAP_USR_RO:

                return __MAP_USR_RO;

        case MAP_KERN_RW:

                return __MAP_KERN_RW;

        case MAP_USR_IO:

                return __MAP_USR_IO;

        case MAP_KERN_IO:

                return __MAP_KERN_IO;

        case MAP_USR_RWX:

                return __MAP_USR_RWX;

        case MAP_KERN_RWX:

                return __MAP_KERN_RWX;

        case MAP_USR_RX:

                return __MAP_USR_RX;

        case MAP_KERN_RX:

                return __MAP_KERN_RX;

        /*

         * Don't remove this, if a flag with

         * same value is introduced, compiler will warn us

         */

        case MAP_INVALID_FLAGS:

        default:

                return MAP_INVALID_FLAGS;

        }

        return 0;

}

void task_init_registers(struct ktcb *task, unsigned long pc)

{

        task->context.pc = (u32)pc;

        task->context.spsr = ARM_MODE_USR;

}

/*

 * Copies all global kernel entries that a user process

 * should have in its pgd. In split page table setups

 * this is a noop.

 */

void copy_pgd_kernel_entries(pgd_table_t *to)

{

        arch_copy_pgd_kernel_entries(to);

}