text: /*
   * Copyright 2010-2011 Calxeda, Inc.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  #include <linux/clk.h>
  #include <linux/clkdev.h>
  #include <linux/clocksource.h>
  #include <linux/dma-mapping.h>
  #include <linux/io.h>
  #include <linux/irq.h>
  #include <linux/irqchip.h>
  #include <linux/irqdomain.h>
  #include <linux/of.h>
  #include <linux/of_irq.h>
  #include <linux/of_platform.h>
  #include <linux/of_address.h>
  #include <linux/smp.h>
  #include <linux/amba/bus.h>
  #include <linux/clk-provider.h>
  
  #include <asm/cacheflush.h>
  #include <asm/cputype.h>
  #include <asm/smp_plat.h>
  #include <asm/hardware/cache-l2x0.h>
  #include <asm/mach/arch.h>
  #include <asm/mach/map.h>
  #include <asm/mach/time.h>
  
  #include "core.h"
  #include "sysregs.h"
  
  void __iomem *sregs_base;
  void __iomem *scu_base_addr;
  
  static void __init highbank_scu_map_io(void)
  {
  	unsigned long base;
  
  	/* Get SCU base */
  	asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
  
  	scu_base_addr = ioremap(base, SZ_4K);
  }
  
  #define HB_JUMP_TABLE_PHYS(cpu)		(0x40 + (0x10 * (cpu)))
  #define HB_JUMP_TABLE_VIRT(cpu)		phys_to_virt(HB_JUMP_TABLE_PHYS(cpu))
  
  void highbank_set_cpu_jump(int cpu, void *jump_addr)
  {
  	cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 0);
  	writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu));
  	__cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16);
  	outer_clean_range(HB_JUMP_TABLE_PHYS(cpu),
  			  HB_JUMP_TABLE_PHYS(cpu) + 15);
  }
  
  static void highbank_l2x0_disable(void)
  {
  	outer_flush_all();
  	/* Disable PL310 L2 Cache controller */
  	highbank_smc1(0x102, 0x0);
  }
  
  static void __init highbank_init_irq(void)
  {
  	irqchip_init();
  
  	if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
  		highbank_scu_map_io();
  
  	/* Enable PL310 L2 Cache controller */
  	if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
  	    of_find_compatible_node(NULL, NULL, "arm,pl310-cache")) {
  		highbank_smc1(0x102, 0x1);
  		l2x0_of_init(0, ~0UL);
  		outer_cache.disable = highbank_l2x0_disable;
  	}
  }
  
  static void __init highbank_timer_init(void)
  {
  	struct device_node *np;
  
  	/* Map system registers */
  	np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
  	sregs_base = of_iomap(np, 0);
  	WARN_ON(!sregs_base);
  
  	of_clk_init(NULL);
  
  	clocksource_of_init();
  }
  
  static void highbank_power_off(void)
  {
  	highbank_set_pwr_shutdown();
  
  	while (1)
  		cpu_do_idle();
  }
  
  static int highbank_platform_notifier(struct notifier_block *nb,
  				  unsigned long event, void *__dev)
  {
  	struct resource *res;
  	int reg = -1;
  	struct device *dev = __dev;
  
  	if (event != BUS_NOTIFY_ADD_DEVICE)
  		return NOTIFY_DONE;
  
  	if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
  		reg = 0xc;
  	else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
  		reg = 0x18;
  	else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
  		reg = 0x20;
  	else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
  		res = platform_get_resource(to_platform_device(dev),
  					    IORESOURCE_MEM, 0);
  		if (res) {
  			if (res->start == 0xfff50000)
  				reg = 0;
  			else if (res->start == 0xfff51000)
  				reg = 4;
  		}
  	}
  
  	if (reg < 0)
  		return NOTIFY_DONE;
  
  	if (of_property_read_bool(dev->of_node, "dma-coherent")) {
  		writel(0xff31, sregs_base + reg);
  		set_dma_ops(dev, &arm_coherent_dma_ops);
  	} else
  		writel(0, sregs_base + reg);
  
  	return NOTIFY_OK;
  }
  
  static struct notifier_block highbank_amba_nb = {
  	.notifier_call = highbank_platform_notifier,
  };
  
  static struct notifier_block highbank_platform_nb = {
  	.notifier_call = highbank_platform_notifier,
  };
  
  static void __init highbank_init(void)
  {
  	pm_power_off = highbank_power_off;
  	highbank_pm_init();
  
  	bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
  	bus_register_notifier(&amba_bustype, &highbank_amba_nb);
  
  	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  }
  
  static const char *highbank_match[] __initconst = {
  	"calxeda,highbank",
  	"calxeda,ecx-2000",
  	NULL,
  };
  
  DT_MACHINE_START(HIGHBANK, "Highbank")
  	.smp		= smp_ops(highbank_smp_ops),
  	.map_io		= debug_ll_io_init,
  	.init_irq	= highbank_init_irq,
  	.init_time	= highbank_timer_init,
  	.init_machine	= highbank_init,
  	.dt_compat	= highbank_match,
  	.restart	= highbank_restart,
  MACHINE_END
  