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/*
* Copyright (C) 2012-2014 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/io.h>
#include "bcm_kona_smc.h"
#include "kona.h"
void __init kona_l2_cache_init(void)
{
int ret;
if (!IS_ENABLED(CONFIG_CACHE_L2X0))
return;
ret = bcm_kona_smc_init();
if (ret) {
pr_info("Secure API not available (%d). Skipping L2 init.\n",
ret);
return;
}
bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
/*
* The aux_val and aux_mask have no effect since L2 cache is already
* enabled. Pass 0s for aux_val and 1s for aux_mask for default value.
*/
ret = l2x0_of_init(0, ~0);
if (ret)
pr_err("Couldn't enable L2 cache: %d\n", ret);
}
static void __iomem *watchdog_base;
void bcm_kona_setup_restart(void)
{
struct device_node *np_wdog;
/*
* The assumption is that whoever calls bcm_kona_setup_restart()
* also needs a Kona Watchdog Timer entry in Device Tree, i.e. we
* report an error if the DT entry is missing.
*/
np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
if (!np_wdog) {
pr_err("brcm,kona-wdt not found in DT, reboot disabled\n");
return;
}
watchdog_base = of_iomap(np_wdog, 0);
WARN(!watchdog_base, "failed to map watchdog base");
of_node_put(np_wdog);
}
#define SECWDOG_OFFSET 0x00000000
#define SECWDOG_RESERVED_MASK 0xE2000000
#define SECWDOG_WD_LOAD_FLAG_MASK 0x10000000
#define SECWDOG_EN_MASK 0x08000000
#define SECWDOG_SRSTEN_MASK 0x04000000
#define SECWDOG_CLKS_SHIFT 20
#define SECWDOG_LOCK_SHIFT 0
void bcm_kona_restart(enum reboot_mode mode, const char *cmd)
{
uint32_t val;
if (!watchdog_base)
panic("Watchdog not mapped. Reboot failed.\n");
/* Enable watchdog2 with very short timeout. */
val = readl(watchdog_base + SECWDOG_OFFSET);
val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
(0x8 << SECWDOG_CLKS_SHIFT) |
(0x8 << SECWDOG_LOCK_SHIFT);
writel(val, watchdog_base + SECWDOG_OFFSET);
while (1)
;
}
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