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/*
* Copyright (C) 2018 Marvell International Ltd.
*
* SPDX-License-Identifier: BSD-3-Clause
* https://spdx.org/licenses
*/
/* GWIN unit device driver for Marvell AP810 SoC */
#include <inttypes.h>
#include <stdint.h>
#include <common/debug.h>
#include <drivers/marvell/gwin.h>
#include <lib/mmio.h>
#include <armada_common.h>
#include <mvebu.h>
#include <mvebu_def.h>
#if LOG_LEVEL >= LOG_LEVEL_INFO
#define DEBUG_ADDR_MAP
#endif
/* common defines */
#define WIN_ENABLE_BIT (0x1)
#define WIN_TARGET_MASK (0xF)
#define WIN_TARGET_SHIFT (0x8)
#define WIN_TARGET(tgt) (((tgt) & WIN_TARGET_MASK) \
<< WIN_TARGET_SHIFT)
/* Bits[43:26] of the physical address are the window base,
* which is aligned to 64MB
*/
#define ADDRESS_RSHIFT (26)
#define ADDRESS_LSHIFT (10)
#define GWIN_ALIGNMENT_64M (0x4000000)
/* AP registers */
#define GWIN_CR_OFFSET(ap, win) (MVEBU_GWIN_BASE(ap) + 0x0 + \
(0x10 * (win)))
#define GWIN_ALR_OFFSET(ap, win) (MVEBU_GWIN_BASE(ap) + 0x8 + \
(0x10 * (win)))
#define GWIN_AHR_OFFSET(ap, win) (MVEBU_GWIN_BASE(ap) + 0xc + \
(0x10 * (win)))
#define CCU_GRU_CR_OFFSET(ap) (MVEBU_CCU_GRU_BASE(ap))
#define CCR_GRU_CR_GWIN_MBYPASS (1 << 1)
static void gwin_check(struct addr_map_win *win)
{
/* The base is always 64M aligned */
if (IS_NOT_ALIGN(win->base_addr, GWIN_ALIGNMENT_64M)) {
win->base_addr &= ~(GWIN_ALIGNMENT_64M - 1);
NOTICE("%s: Align the base address to 0x%" PRIx64 "\n",
__func__, win->base_addr);
}
/* size parameter validity check */
if (IS_NOT_ALIGN(win->win_size, GWIN_ALIGNMENT_64M)) {
win->win_size = ALIGN_UP(win->win_size, GWIN_ALIGNMENT_64M);
NOTICE("%s: Aligning window size to 0x%" PRIx64 "\n",
__func__, win->win_size);
}
}
static void gwin_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 & WIN_TARGET_MASK) != win->target_id) {
ERROR("target ID = %d, is invalid\n", win->target_id);
return;
}
/* calculate 64bit end-address */
end_addr = (win->base_addr + win->win_size - 1);
alr = (uint32_t)((win->base_addr >> ADDRESS_RSHIFT) << ADDRESS_LSHIFT);
ahr = (uint32_t)((end_addr >> ADDRESS_RSHIFT) << ADDRESS_LSHIFT);
/* write start address and end address for GWIN */
mmio_write_32(GWIN_ALR_OFFSET(ap_index, win_num), alr);
mmio_write_32(GWIN_AHR_OFFSET(ap_index, win_num), ahr);
/* write the target ID and enable the window */
mmio_write_32(GWIN_CR_OFFSET(ap_index, win_num),
WIN_TARGET(win->target_id) | WIN_ENABLE_BIT);
}
static void gwin_disable_window(int ap_index, uint32_t win_num)
{
uint32_t win_reg;
win_reg = mmio_read_32(GWIN_CR_OFFSET(ap_index, win_num));
win_reg &= ~WIN_ENABLE_BIT;
mmio_write_32(GWIN_CR_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 gwin_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_GWIN_MAX_WINS - i - 1;
gwin_check(win);
gwin_enable_window(ap_index, win, win_id);
win++;
}
}
/*
* NOTE: Use the same window array for insertion and removal of
* temporary windows.
*/
void gwin_temp_win_remove(int ap_index, struct addr_map_win *win, int size)
{
uint32_t win_id;
for (int i = 0; i < size; i++) {
uint64_t base;
uint32_t target;
win_id = MVEBU_GWIN_MAX_WINS - i - 1;
target = mmio_read_32(GWIN_CR_OFFSET(ap_index, win_id));
target >>= WIN_TARGET_SHIFT;
target &= WIN_TARGET_MASK;
base = mmio_read_32(GWIN_ALR_OFFSET(ap_index, win_id));
base >>= ADDRESS_LSHIFT;
base <<= ADDRESS_RSHIFT;
if (win->target_id != target) {
ERROR("%s: Trying to remove bad window-%d!\n",
__func__, win_id);
continue;
}
gwin_disable_window(ap_index, win_id);
win++;
}
}
#ifdef DEBUG_ADDR_MAP
static void dump_gwin(int ap_index)
{
uint32_t win_num;
/* Dump all GWIN windows */
printf("\tbank target start end\n");
printf("\t----------------------------------------------------\n");
for (win_num = 0; win_num < MVEBU_GWIN_MAX_WINS; win_num++) {
uint32_t cr;
uint64_t alr, ahr;
cr = mmio_read_32(GWIN_CR_OFFSET(ap_index, win_num));
/* Window enabled */
if (cr & WIN_ENABLE_BIT) {
alr = mmio_read_32(GWIN_ALR_OFFSET(ap_index, win_num));
alr = (alr >> ADDRESS_LSHIFT) << ADDRESS_RSHIFT;
ahr = mmio_read_32(GWIN_AHR_OFFSET(ap_index, win_num));
ahr = (ahr >> ADDRESS_LSHIFT) << ADDRESS_RSHIFT;
printf("\tgwin %d 0x%016" PRIx64 " 0x%016" PRIx64 "\n",
(cr >> 8) & 0xF, alr, ahr);
}
}
}
#endif
int init_gwin(int ap_index)
{
struct addr_map_win *win;
uint32_t win_id;
uint32_t win_count;
uint32_t win_reg;
INFO("Initializing GWIN Address decoding\n");
/* Get the array of the windows and its size */
marvell_get_gwin_memory_map(ap_index, &win, &win_count);
if (win_count <= 0) {
INFO("no windows configurations found\n");
return 0;
}
if (win_count > MVEBU_GWIN_MAX_WINS) {
ERROR("number of windows is bigger than %d\n",
MVEBU_GWIN_MAX_WINS);
return 0;
}
/* disable all windows */
for (win_id = 0; win_id < MVEBU_GWIN_MAX_WINS; win_id++)
gwin_disable_window(ap_index, win_id);
/* enable relevant windows */
for (win_id = 0; win_id < win_count; win_id++, win++) {
gwin_check(win);
gwin_enable_window(ap_index, win, win_id);
}
/* GWIN Miss feature has not verified, therefore any access towards
* remote AP should be accompanied with proper configuration to
* GWIN registers group and therefore the GWIN Miss feature
* should be set into Bypass mode, need to make sure all GWIN regions
* are defined correctly that will assure no GWIN miss occurrence
* JIRA-AURORA2-1630
*/
INFO("Update GWIN miss bypass\n");
win_reg = mmio_read_32(CCU_GRU_CR_OFFSET(ap_index));
win_reg |= CCR_GRU_CR_GWIN_MBYPASS;
mmio_write_32(CCU_GRU_CR_OFFSET(ap_index), win_reg);
#ifdef DEBUG_ADDR_MAP
dump_gwin(ap_index);
#endif
INFO("Done GWIN Address decoding Initializing\n");
return 0;
}
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