127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
/*
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* Copyright (C) 2012 Altera Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/clk-provider.h>
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#include <linux/irqchip.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/reboot.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include "core.h"
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void __iomem *socfpga_scu_base_addr = ((void __iomem *)(SOCFPGA_SCU_VIRT_BASE));
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void __iomem *sys_manager_base_addr;
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void __iomem *rst_manager_base_addr;
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void __iomem *clk_mgr_base_addr;
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unsigned long cpu1start_addr;
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static struct map_desc scu_io_desc __initdata = {
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.virtual = SOCFPGA_SCU_VIRT_BASE,
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.pfn = 0, /* run-time */
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.length = SZ_8K,
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.type = MT_DEVICE,
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};
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static struct map_desc uart_io_desc __initdata = {
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.virtual = 0xfec02000,
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.pfn = __phys_to_pfn(0xffc02000),
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.length = SZ_8K,
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.type = MT_DEVICE,
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};
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static void __init socfpga_scu_map_io(void)
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{
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unsigned long base;
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/* Get SCU base */
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asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
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scu_io_desc.pfn = __phys_to_pfn(base);
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iotable_init(&scu_io_desc, 1);
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}
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static void __init socfpga_map_io(void)
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{
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socfpga_scu_map_io();
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iotable_init(&uart_io_desc, 1);
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early_printk("Early printk initialized\n");
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}
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void __init socfpga_sysmgr_init(void)
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{
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, "altr,sys-mgr");
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if (of_property_read_u32(np, "cpu1-start-addr",
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(u32 *) &cpu1start_addr))
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pr_err("SMP: Need cpu1-start-addr in device tree.\n");
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sys_manager_base_addr = of_iomap(np, 0);
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np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");
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rst_manager_base_addr = of_iomap(np, 0);
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np = of_find_compatible_node(NULL, NULL, "altr,clk-mgr");
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clk_mgr_base_addr = of_iomap(np, 0);
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}
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static void __init socfpga_init_irq(void)
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{
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irqchip_init();
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socfpga_sysmgr_init();
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}
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static void socfpga_cyclone5_restart(enum reboot_mode mode, const char *cmd)
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{
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u32 temp;
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temp = readl(rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
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if (mode == REBOOT_HARD)
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temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
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else
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temp |= RSTMGR_CTRL_SWWARMRSTREQ;
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writel(temp, rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
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}
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static void __init socfpga_cyclone5_init(void)
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{
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l2x0_of_init(0, ~0UL);
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of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
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of_clk_init(NULL);
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socfpga_init_clocks();
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}
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static const char *altera_dt_match[] = {
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"altr,socfpga",
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NULL
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};
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DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
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.smp = smp_ops(socfpga_smp_ops),
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.map_io = socfpga_map_io,
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.init_irq = socfpga_init_irq,
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.init_machine = socfpga_cyclone5_init,
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.restart = socfpga_cyclone5_restart,
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.dt_compat = altera_dt_match,
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MACHINE_END
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