cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

board_bcm281xx.c (1996B)

      1/*
      2 * Copyright (C) 2012-2014 Broadcom Corporation
      3 *
      4 * This program is free software; you can redistribute it and/or
      5 * modify it under the terms of the GNU General Public License as
      6 * published by the Free Software Foundation version 2.
      7 *
      8 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
      9 * kind, whether express or implied; without even the implied warranty
     10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     11 * GNU General Public License for more details.
     12 */
     13
     14#include <linux/clocksource.h>
     15#include <linux/of_address.h>
     16
     17#include <asm/mach/arch.h>
     18
     19#include "kona_l2_cache.h"
     20
     21#define SECWDOG_OFFSET			0x00000000
     22#define SECWDOG_RESERVED_MASK		0xe2000000
     23#define SECWDOG_WD_LOAD_FLAG_MASK	0x10000000
     24#define SECWDOG_EN_MASK			0x08000000
     25#define SECWDOG_SRSTEN_MASK		0x04000000
     26#define SECWDOG_CLKS_SHIFT		20
     27#define SECWDOG_COUNT_SHIFT		0
     28
     29static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
     30{
     31	uint32_t val;
     32	void __iomem *base;
     33	struct device_node *np_wdog;
     34
     35	np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
     36	if (!np_wdog) {
     37		pr_emerg("Couldn't find brcm,kona-wdt\n");
     38		return;
     39	}
     40	base = of_iomap(np_wdog, 0);
     41	of_node_put(np_wdog);
     42	if (!base) {
     43		pr_emerg("Couldn't map brcm,kona-wdt\n");
     44		return;
     45	}
     46
     47	/* Enable watchdog with short timeout (244us). */
     48	val = readl(base + SECWDOG_OFFSET);
     49	val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
     50	val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
     51		(0x15 << SECWDOG_CLKS_SHIFT) |
     52		(0x8 << SECWDOG_COUNT_SHIFT);
     53	writel(val, base + SECWDOG_OFFSET);
     54
     55	/* Wait for reset */
     56	while (1);
     57}
     58
     59static void __init bcm281xx_init(void)
     60{
     61	kona_l2_cache_init();
     62}
     63
     64static const char * const bcm281xx_dt_compat[] = {
     65	"brcm,bcm11351",	/* Have to use the first number upstreamed */
     66	NULL,
     67};
     68
     69DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")
     70	.init_machine = bcm281xx_init,
     71	.restart = bcm281xx_restart,
     72	.dt_compat = bcm281xx_dt_compat,
     73MACHINE_END