/*-
 * Copyright (c) 2014 Andrew Turner
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#if defined(KASAN) || defined(KCSAN)
#define SAN_RUNTIME
#endif

#include "opt_platform.h"

#include <sys/param.h>
#include <vm/vm.h>
#include <vm/pmap.h>

#include <machine/bus.h>

uint8_t  generic_bs_r_1(void *, bus_space_handle_t, bus_size_t);
uint16_t generic_bs_r_2(void *, bus_space_handle_t, bus_size_t);
uint32_t generic_bs_r_4(void *, bus_space_handle_t, bus_size_t);
uint64_t generic_bs_r_8(void *, bus_space_handle_t, bus_size_t);

void generic_bs_rm_1(void *, bus_space_handle_t, bus_size_t, uint8_t *,
    bus_size_t);
void generic_bs_rm_2(void *, bus_space_handle_t, bus_size_t, uint16_t *,
    bus_size_t);
void generic_bs_rm_4(void *, bus_space_handle_t, bus_size_t, uint32_t *,
    bus_size_t);
void generic_bs_rm_8(void *, bus_space_handle_t, bus_size_t, uint64_t *,
    bus_size_t);

void generic_bs_rr_1(void *, bus_space_handle_t, bus_size_t, uint8_t *,
    bus_size_t);
void generic_bs_rr_2(void *, bus_space_handle_t, bus_size_t, uint16_t *,
    bus_size_t);
void generic_bs_rr_4(void *, bus_space_handle_t, bus_size_t, uint32_t *,
    bus_size_t);
void generic_bs_rr_8(void *, bus_space_handle_t, bus_size_t, uint64_t *,
    bus_size_t);

void generic_bs_w_1(void *, bus_space_handle_t, bus_size_t, uint8_t);
void generic_bs_w_2(void *, bus_space_handle_t, bus_size_t, uint16_t);
void generic_bs_w_4(void *, bus_space_handle_t, bus_size_t, uint32_t);
void generic_bs_w_8(void *, bus_space_handle_t, bus_size_t, uint64_t);

void generic_bs_wm_1(void *, bus_space_handle_t, bus_size_t, const uint8_t *,
    bus_size_t);
void generic_bs_wm_2(void *, bus_space_handle_t, bus_size_t, const uint16_t *,
    bus_size_t);
void generic_bs_wm_4(void *, bus_space_handle_t, bus_size_t, const uint32_t *,
    bus_size_t);
void generic_bs_wm_8(void *, bus_space_handle_t, bus_size_t, const uint64_t *,
    bus_size_t);

void generic_bs_wr_1(void *, bus_space_handle_t, bus_size_t, const uint8_t *,
    bus_size_t);
void generic_bs_wr_2(void *, bus_space_handle_t, bus_size_t, const uint16_t *,
    bus_size_t);
void generic_bs_wr_4(void *, bus_space_handle_t, bus_size_t, const uint32_t *,
    bus_size_t);
void generic_bs_wr_8(void *, bus_space_handle_t, bus_size_t, const uint64_t *,
    bus_size_t);

int generic_bs_peek_1(void *, bus_space_handle_t,  bus_size_t , uint8_t *);
int generic_bs_peek_2(void *, bus_space_handle_t,  bus_size_t , uint16_t *);
int generic_bs_peek_4(void *, bus_space_handle_t,  bus_size_t , uint32_t *);
int generic_bs_peek_8(void *, bus_space_handle_t,  bus_size_t , uint64_t *);

int generic_bs_poke_1(void *, bus_space_handle_t,  bus_size_t, uint8_t);
int generic_bs_poke_2(void *, bus_space_handle_t,  bus_size_t, uint16_t);
int generic_bs_poke_4(void *, bus_space_handle_t,  bus_size_t, uint32_t);
int generic_bs_poke_8(void *, bus_space_handle_t,  bus_size_t, uint64_t);

static int
generic_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
    bus_space_handle_t *bshp)
{
        vm_memattr_t ma;
        void *va;

        ma = VM_MEMATTR_DEVICE;
        if (flags == BUS_SPACE_MAP_NONPOSTED)
                ma = VM_MEMATTR_DEVICE_NP;
        va = pmap_mapdev_attr(bpa, size, ma);
        if (va == NULL)
                return (ENOMEM);
        *bshp = (bus_space_handle_t)va;
        return (0);
}

static void
generic_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
{

        pmap_unmapdev((void *)bsh, size);
}

static void
generic_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
    bus_size_t size, int flags)
{
}

static int
generic_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
    bus_size_t size, bus_space_handle_t *nbshp)
{

        *nbshp = bsh + offset;
        return (0);
}

/*
 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
 * by tag/handle starting at `offset'.
 */
static void
generic_bs_sr_1(void *t, bus_space_handle_t bsh,
    bus_size_t offset, uint8_t value, size_t count)
{

        for (; count != 0; count--, offset++)
                generic_bs_w_1(t, bsh, offset, value);
}

static void
generic_bs_sr_2(void *t, bus_space_handle_t bsh,
                       bus_size_t offset, uint16_t value, size_t count)
{

        for (; count != 0; count--, offset += 2)
                generic_bs_w_2(t, bsh, offset, value);
}

static void
generic_bs_sr_4(void *t, bus_space_handle_t bsh,
    bus_size_t offset, uint32_t value, size_t count)
{

        for (; count != 0; count--, offset += 4)
                generic_bs_w_4(t, bsh, offset, value);
}

static void
generic_bs_sr_8(void *t, bus_space_handle_t bsh, bus_size_t offset,
    uint64_t value, size_t count)
{

        for (; count != 0; count--, offset += 8)
                generic_bs_w_8(t, bsh, offset, value);
}

struct bus_space memmap_bus = {
        /* cookie */
        .bs_cookie = NULL,

        /* mapping/unmapping */
        .bs_map = generic_bs_map,
        .bs_unmap = generic_bs_unmap,
        .bs_subregion = generic_bs_subregion,

        /* allocation/deallocation */
        .bs_alloc = NULL,
        .bs_free = NULL,

        /* barrier */
        .bs_barrier = generic_bs_barrier,

        /* read single */
        .bs_r_1 = generic_bs_r_1,
        .bs_r_2 = generic_bs_r_2,
        .bs_r_4 = generic_bs_r_4,
        .bs_r_8 = generic_bs_r_8,

        /* read multiple */
        .bs_rm_1 = generic_bs_rm_1,
        .bs_rm_2 = generic_bs_rm_2,
        .bs_rm_4 = generic_bs_rm_4,
        .bs_rm_8 = generic_bs_rm_8,

        /* read region */
        .bs_rr_1 = generic_bs_rr_1,
        .bs_rr_2 = generic_bs_rr_2,
        .bs_rr_4 = generic_bs_rr_4,
        .bs_rr_8 = generic_bs_rr_8,

        /* write single */
        .bs_w_1 = generic_bs_w_1,
        .bs_w_2 = generic_bs_w_2,
        .bs_w_4 = generic_bs_w_4,
        .bs_w_8 = generic_bs_w_8,

        /* write multiple */
        .bs_wm_1 = generic_bs_wm_1,
        .bs_wm_2 = generic_bs_wm_2,
        .bs_wm_4 = generic_bs_wm_4,
        .bs_wm_8 = generic_bs_wm_8,

        /* write region */
        .bs_wr_1 = generic_bs_wr_1,
        .bs_wr_2 = generic_bs_wr_2,
        .bs_wr_4 = generic_bs_wr_4,
        .bs_wr_8 = generic_bs_wr_8,

        /* set multiple */
        .bs_sm_1 = NULL,
        .bs_sm_2 = NULL,
        .bs_sm_4 = NULL,
        .bs_sm_8 = NULL,

        /* set region */
        .bs_sr_1 =      generic_bs_sr_1,
        .bs_sr_2 =      generic_bs_sr_2,
        .bs_sr_4 =      generic_bs_sr_4,
        .bs_sr_8 =      generic_bs_sr_8,

        /* copy */
        .bs_c_1 = NULL,
        .bs_c_2 = NULL,
        .bs_c_4 = NULL,
        .bs_c_8 = NULL,

        /* read single stream */
        .bs_r_1_s = NULL,
        .bs_r_2_s = NULL,
        .bs_r_4_s = NULL,
        .bs_r_8_s = NULL,

        /* read multiple stream */
        .bs_rm_1_s = generic_bs_rm_1,
        .bs_rm_2_s = generic_bs_rm_2,
        .bs_rm_4_s = generic_bs_rm_4,
        .bs_rm_8_s = generic_bs_rm_8,

        /* read region stream */
        .bs_rr_1_s = NULL,
        .bs_rr_2_s = NULL,
        .bs_rr_4_s = NULL,
        .bs_rr_8_s = NULL,

        /* write single stream */
        .bs_w_1_s = NULL,
        .bs_w_2_s = NULL,
        .bs_w_4_s = NULL,
        .bs_w_8_s = NULL,

        /* write multiple stream */
        .bs_wm_1_s = generic_bs_wm_1,
        .bs_wm_2_s = generic_bs_wm_2,
        .bs_wm_4_s = generic_bs_wm_4,
        .bs_wm_8_s = generic_bs_wm_8,

        /* write region stream */
        .bs_wr_1_s = NULL,
        .bs_wr_2_s = NULL,
        .bs_wr_4_s = NULL,
        .bs_wr_8_s = NULL,

        /* peek */
        .bs_peek_1 = generic_bs_peek_1,
        .bs_peek_2 = generic_bs_peek_2,
        .bs_peek_4 = generic_bs_peek_4,
        .bs_peek_8 = generic_bs_peek_8,

        /* poke */
        .bs_poke_1 = generic_bs_poke_1,
        .bs_poke_2 = generic_bs_poke_2,
        .bs_poke_4 = generic_bs_poke_4,
        .bs_poke_8 = generic_bs_poke_8,
};

#ifdef FDT
bus_space_tag_t fdtbus_bs_tag = &memmap_bus;
#endif