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/idle.h>
  41 #include <asm/reboot.h>
  42 #include <asm/time.h>
  43 #include <asm/bootinfo.h>
  44
  45 #include <linux/of_fdt.h>
  46 #include <linux/of_platform.h>
  47 #include <linux/of_device.h>
  48
  49 #include <asm/netlogic/haldefs.h>
  50 #include <asm/netlogic/common.h>
  51
  52 #include <asm/netlogic/xlp-hal/iomap.h>
  53 #include <asm/netlogic/xlp-hal/xlp.h>
  54 #include <asm/netlogic/xlp-hal/sys.h>
  55
  56 uint64_t nlm_io_base;
  57 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
  58 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
  59 unsigned int nlm_threads_per_core;
  60 extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[], __dtb_start[];
  61
  62 static void nlm_linux_exit(void)
  63 {
  64         uint64_t sysbase = nlm_get_node(0)->sysbase;
  65
  66         nlm_write_sys_reg(sysbase, SYS_CHIP_RESET, 1);
  67         for ( ; ; )
  68                 cpu_wait();
  69 }
  70
  71 void __init plat_mem_setup(void)
  72 {
  73         void *fdtp;
  74
  75         panic_timeout   = 5;
  76         _machine_restart = (void (*)(char *))nlm_linux_exit;
  77         _machine_halt   = nlm_linux_exit;
  78         pm_power_off    = nlm_linux_exit;
  79
  80         /*
  81          * If no FDT pointer is passed in, use the built-in FDT.
  82          * device_tree_init() does not handle CKSEG0 pointers in
  83          * 64-bit, so convert pointer.
  84          */
  85         fdtp = (void *)(long)fw_arg0;
  86         if (!fdtp) {
  87                 switch (current_cpu_data.processor_id & 0xff00) {
  88 #ifdef CONFIG_DT_XLP_SVP
  89                 case PRID_IMP_NETLOGIC_XLP3XX:
  90                         fdtp = __dtb_xlp_svp_begin;
  91                         break;
  92 #endif
  93 #ifdef CONFIG_DT_XLP_EVP
  94                 case PRID_IMP_NETLOGIC_XLP8XX:
  95                         fdtp = __dtb_xlp_evp_begin;
  96                         break;
  97 #endif
  98                 default:
  99                         /* Pick a built-in if any, and hope for the best */
 100                         fdtp = __dtb_start;
 101                         break;
 102                 }
 103         }
 104         fdtp = phys_to_virt(__pa(fdtp));
 105         early_init_devtree(fdtp);
 106 }
 107
 108 const char *get_system_type(void)
 109 {
 110         return "Netlogic XLP Series";
 111 }
 112
 113 void __init prom_free_prom_memory(void)
 114 {
 115         /* Nothing yet */
 116 }
 117
 118 void xlp_mmu_init(void)
 119 {
 120         /* enable extended TLB and Large Fixed TLB */
 121         write_c0_config6(read_c0_config6() | 0x24);
 122
 123         /* set page mask of Fixed TLB in config7 */
 124         write_c0_config7(PM_DEFAULT_MASK >>
 125                 (13 + (ffz(PM_DEFAULT_MASK >> 13) / 2)));
 126 }
 127
 128 void nlm_percpu_init(int hwcpuid)
 129 {
 130 }
 131
 132 void __init prom_init(void)
 133 {
 134         nlm_io_base = CKSEG1ADDR(XLP_DEFAULT_IO_BASE);
 135         xlp_mmu_init();
 136         nlm_node_init(0);
 137
 138 #ifdef CONFIG_SMP
 139         cpumask_setall(&nlm_cpumask);
 140         nlm_wakeup_secondary_cpus();
 141
 142         /* update TLB size after waking up threads */
 143         current_cpu_data.tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
 144
 145         register_smp_ops(&nlm_smp_ops);
 146 #endif
 147 }
 148
 149 void __init device_tree_init(void)
 150 {
 151         unsigned long base, size;
 152
 153         if (!initial_boot_params)
 154                 return;
 155
 156         base = virt_to_phys((void *)initial_boot_params);
 157         size = be32_to_cpu(initial_boot_params->totalsize);
 158
 159         /* Before we do anything, lets reserve the dt blob */
 160         reserve_bootmem(base, size, BOOTMEM_DEFAULT);
 161
 162         unflatten_device_tree();
 163
 164         /* free the space reserved for the dt blob */
 165         free_bootmem(base, size);
 166 }
 167
 168 static struct of_device_id __initdata xlp_ids[] = {
 169         { .compatible = "simple-bus", },
 170         {},
 171 };
 172
 173 int __init xlp8xx_ds_publish_devices(void)
 174 {
 175         if (!of_have_populated_dt())
 176                 return 0;
 177         return of_platform_bus_probe(NULL, xlp_ids, NULL);
 178 }
 179
 180 device_initcall(xlp8xx_ds_publish_devices);