arch/mips/netlogic/xlp/setup.c

   1 /*
   2  * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
   3  * reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the NetLogic
   9  * license below:
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/serial_8250.h>
  37 #include <linux/pm.h>
  38 #include <linux/bootmem.h>
  39
  40 #include <asm/reboot.h>
  41 #include <asm/time.h>
  42 #include <asm/bootinfo.h>
  43
  44 #include <linux/of_fdt.h>
  45 #include <linux/of_platform.h>
  46 #include <linux/of_device.h>
  47
  48 #include <asm/netlogic/haldefs.h>
  49 #include <asm/netlogic/common.h>
  50
  51 #include <asm/netlogic/xlp-hal/iomap.h>
  52 #include <asm/netlogic/xlp-hal/xlp.h>
  53 #include <asm/netlogic/xlp-hal/sys.h>
  54
  55 uint64_t nlm_io_base;
  56 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
  57 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
  58 unsigned int nlm_threads_per_core;
  59 extern u32 __dtb_start[];
  60
  61 static void nlm_linux_exit(void)
  62 {
  63         uint64_t sysbase = nlm_get_node(0)->sysbase;
  64
  65         nlm_write_sys_reg(sysbase, SYS_CHIP_RESET, 1);
  66         for ( ; ; )
  67                 cpu_wait();
  68 }
  69
  70 void __init plat_mem_setup(void)
  71 {
  72         void *fdtp;
  73
  74         panic_timeout   = 5;
  75         _machine_restart = (void (*)(char *))nlm_linux_exit;
  76         _machine_halt   = nlm_linux_exit;
  77         pm_power_off    = nlm_linux_exit;
  78
  79         /*
  80          * If no FDT pointer is passed in, use the built-in FDT.
  81          * device_tree_init() does not handle CKSEG0 pointers in
  82          * 64-bit, so convert pointer.
  83          */
  84         fdtp = (void *)(long)fw_arg0;
  85         if (!fdtp)
  86                 fdtp = __dtb_start;
  87         fdtp = phys_to_virt(__pa(fdtp));
  88         early_init_devtree(fdtp);
  89 }
  90
  91 const char *get_system_type(void)
  92 {
  93         return "Netlogic XLP Series";
  94 }
  95
  96 void __init prom_free_prom_memory(void)
  97 {
  98         /* Nothing yet */
  99 }
 100
 101 void xlp_mmu_init(void)
 102 {
 103         /* enable extended TLB and Large Fixed TLB */
 104         write_c0_config6(read_c0_config6() | 0x24);
 105
 106         /* set page mask of Fixed TLB in config7 */
 107         write_c0_config7(PM_DEFAULT_MASK >>
 108                 (13 + (ffz(PM_DEFAULT_MASK >> 13) / 2)));
 109 }
 110
 111 void nlm_percpu_init(int hwcpuid)
 112 {
 113 }
 114
 115 void __init prom_init(void)
 116 {
 117         nlm_io_base = CKSEG1ADDR(XLP_DEFAULT_IO_BASE);
 118         xlp_mmu_init();
 119         nlm_node_init(0);
 120
 121 #ifdef CONFIG_SMP
 122         cpumask_setall(&nlm_cpumask);
 123         nlm_wakeup_secondary_cpus();
 124
 125         /* update TLB size after waking up threads */
 126         current_cpu_data.tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
 127
 128         register_smp_ops(&nlm_smp_ops);
 129 #endif
 130 }
 131
 132 void __init device_tree_init(void)
 133 {
 134         unsigned long base, size;
 135
 136         if (!initial_boot_params)
 137                 return;
 138
 139         base = virt_to_phys((void *)initial_boot_params);
 140         size = be32_to_cpu(initial_boot_params->totalsize);
 141
 142         /* Before we do anything, lets reserve the dt blob */
 143         reserve_bootmem(base, size, BOOTMEM_DEFAULT);
 144
 145         unflatten_device_tree();
 146
 147         /* free the space reserved for the dt blob */
 148         free_bootmem(base, size);
 149 }
 150
 151 static struct of_device_id __initdata xlp_ids[] = {
 152         { .compatible = "simple-bus", },
 153         {},
 154 };
 155
 156 int __init xlp8xx_ds_publish_devices(void)
 157 {
 158         if (!of_have_populated_dt())
 159                 return 0;
 160         return of_platform_bus_probe(NULL, xlp_ids, NULL);
 161 }
 162
 163 device_initcall(xlp8xx_ds_publish_devices);