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/*
* ***************************************************************************
* Copyright (C) 2016 Marvell International Ltd.
* ***************************************************************************
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of Marvell nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
*
***************************************************************************
*/
#include <plat_def.h>
#include <debug.h>
#include <mmio.h>
#include <mvebu.h>
#include <io_win.h>
#include <plat_config.h>
#if LOG_LEVEL >= LOG_LEVEL_INFO
#define DEBUG_ADDR_MAP
#endif
/* common defines */
#define WIN_ENABLE_BIT (0x1)
/* Physical address of the base of the window = {Addr[19:0],20`h0} */
#define ADDRESS_SHIFT (20 - 4)
#define ADDRESS_MASK (0xFFFFFFF0)
#define IO_WIN_ALIGNMENT_1M (0x100000)
#define IO_WIN_ALIGNMENT_64K (0x10000)
/* AP registers */
#define IO_WIN_ALR_OFFSET(ap, win) (MVEBU_IO_WIN_BASE(ap) + 0x0 + (0x10 * win))
#define IO_WIN_AHR_OFFSET(ap, win) (MVEBU_IO_WIN_BASE(ap) + 0x8 + (0x10 * win))
#define IO_WIN_CR_OFFSET(ap, win) (MVEBU_IO_WIN_BASE(ap) + 0xC + (0x10 * win))
static void io_win_check(struct addr_map_win *win)
{
/* for IO The base is always 1M aligned */
/* check if address is aligned to 1M */
if (IS_NOT_ALIGN(win->base_addr, IO_WIN_ALIGNMENT_1M)) {
win->base_addr = ALIGN_UP(win->base_addr, IO_WIN_ALIGNMENT_1M);
NOTICE("%s: Align up the base address to 0x%lx\n", __func__, win->base_addr);
}
/* size parameter validity check */
if (IS_NOT_ALIGN(win->win_size, IO_WIN_ALIGNMENT_1M)) {
win->win_size = ALIGN_UP(win->win_size, IO_WIN_ALIGNMENT_1M);
NOTICE("%s: Aligning size to 0x%lx\n", __func__, win->win_size);
}
}
static void io_win_enable_window(int ap_index, struct addr_map_win *win, uint32_t win_num)
{
uint32_t alr, ahr;
uint64_t end_addr;
if (win->target_id < 0 || win->target_id >= MVEBU_IO_WIN_MAX_WINS) {
ERROR("target ID = %d, is invalid\n", win->target_id);
return;
}
if ((win_num == 0) || (win_num > MVEBU_IO_WIN_MAX_WINS)) {
ERROR("Enabling wrong IOW window %d!\n", win_num);
return;
}
/* calculate the end-address */
end_addr = (win->base_addr + win->win_size - 1);
alr = (uint32_t)((win->base_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
alr |= WIN_ENABLE_BIT;
ahr = (uint32_t)((end_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
/* write start address and end address for IO window */
mmio_write_32(IO_WIN_ALR_OFFSET(ap_index, win_num), alr);
mmio_write_32(IO_WIN_AHR_OFFSET(ap_index, win_num), ahr);
/* write window target */
mmio_write_32(IO_WIN_CR_OFFSET(ap_index, win_num), win->target_id);
}
static void io_win_disable_window(int ap_index, uint32_t win_num)
{
uint32_t win_reg;
if ((win_num == 0) || (win_num > MVEBU_IO_WIN_MAX_WINS)) {
ERROR("Disabling wrong IOW window %d!\n", win_num);
return;
}
win_reg = mmio_read_32(IO_WIN_ALR_OFFSET(ap_index, win_num));
win_reg &= ~WIN_ENABLE_BIT;
mmio_write_32(IO_WIN_ALR_OFFSET(ap_index, win_num), win_reg);
}
/* Insert/Remove temporary window for using the out-of reset default
* CPx base address to access the CP configuration space prior to
* the further base address update in accordance with address mapping
* design.
*
* NOTE: Use the same window array for insertion and removal of
* temporary windows.
*/
void iow_temp_win_insert(int ap_index, struct addr_map_win *win, int size)
{
uint32_t win_id;
for (int i = 0; i < size; i++) {
win_id = MVEBU_IO_WIN_MAX_WINS - i - 1;
io_win_check(win);
io_win_enable_window(ap_index, win, win_id);
win++;
}
}
/*
* NOTE: Use the same window array for insertion and removal of
* temporary windows.
*/
void iow_temp_win_remove(int ap_index, struct addr_map_win *win, int size)
{
uint32_t win_id;
/* Start from the last window and do not touch Win0 */
for (int i = 0; i < size; i++) {
uint64_t base;
uint32_t target;
win_id = MVEBU_IO_WIN_MAX_WINS - i - 1;
target = mmio_read_32(IO_WIN_CR_OFFSET(ap_index, win_id));
base = mmio_read_32(IO_WIN_ALR_OFFSET(ap_index, win_id));
base &= ~WIN_ENABLE_BIT;
base <<= ADDRESS_SHIFT;
if ((win->target_id != target) || (win->base_addr != base)) {
ERROR("%s: Trying to remove bad window-%d!\n", __func__, win_id);
continue;
}
io_win_disable_window(ap_index, win_id);
win++;
}
}
#ifdef DEBUG_ADDR_MAP
static void dump_io_win(int ap_index)
{
uint32_t trgt_id, win_id;
uint32_t alr, ahr;
uint64_t start, end;
/* Dump all IO windows */
printf("==================== AP-%d IOW =====================\n", ap_index);
printf("bank target start end\n");
printf("----------------------------------------------------\n");
for (win_id = 0; win_id < MVEBU_IO_WIN_MAX_WINS; win_id++) {
alr = mmio_read_32(IO_WIN_ALR_OFFSET(ap_index, win_id));
if (alr & WIN_ENABLE_BIT) {
alr &= ~WIN_ENABLE_BIT;
ahr = mmio_read_32(IO_WIN_AHR_OFFSET(ap_index, win_id));
trgt_id = mmio_read_32(IO_WIN_CR_OFFSET(ap_index, win_id));
start = ((uint64_t)alr << ADDRESS_SHIFT);
end = (((uint64_t)ahr + 0x10) << ADDRESS_SHIFT);
printf("io-win %d 0x%016lx 0x%016lx\n", trgt_id, start, end);
}
}
printf("io-win gcr is %x\n", mmio_read_32(MVEBU_IO_WIN_BASE(ap_index) + MVEBU_IO_WIN_GCR_OFFSET));
printf("==================== AP-%d IOW =====================\n", ap_index);
return;
}
#endif
int init_io_win(int ap_index)
{
struct addr_map_win *win;
uint32_t win_id, win_reg;
uint32_t win_count;
INFO("Initializing IO WIN Address decoding\n");
/* Get the array of the windows and its size */
marvell_get_io_win_memory_map(ap_index, &win, &win_count);
if (win_count <= 0)
INFO("no windows configurations found\n");
if (win_count > MVEBU_IO_WIN_MAX_WINS) {
INFO("number of windows is bigger than %d\n", MVEBU_IO_WIN_MAX_WINS);
return 0;
}
/* Get the default target id to set the GCR */
win_reg = marvell_get_io_win_gcr_target(ap_index);
mmio_write_32(MVEBU_IO_WIN_BASE(ap_index) + MVEBU_IO_WIN_GCR_OFFSET, win_reg);
/* disable all IO windows */
for (win_id = 1; win_id < MVEBU_IO_WIN_MAX_WINS; win_id++)
io_win_disable_window(ap_index, win_id);
/* enable relevant windows, starting from win_id=1 because index 0 dedicated for BootRom */
for (win_id = 1; win_id <= win_count; win_id++, win++) {
io_win_check(win);
io_win_enable_window(ap_index, win, win_id);
}
#ifdef DEBUG_ADDR_MAP
dump_io_win(ap_index);
#endif
INFO("Done IO WIN Address decoding Initializing\n");
return 0;
}
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