arch/mips/netlogic/xlr/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
  39 #include <asm/idle.h>
  40 #include <asm/reboot.h>
  41 #include <asm/time.h>
  42 #include <asm/bootinfo.h>
  43
  44 #include <asm/netlogic/interrupt.h>
  45 #include <asm/netlogic/psb-bootinfo.h>
  46 #include <asm/netlogic/haldefs.h>
  47 #include <asm/netlogic/common.h>
  48
  49 #include <asm/netlogic/xlr/xlr.h>
  50 #include <asm/netlogic/xlr/iomap.h>
  51 #include <asm/netlogic/xlr/pic.h>
  52 #include <asm/netlogic/xlr/gpio.h>
  53 #include <asm/netlogic/xlr/fmn.h>
  54
  55 uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
  56 struct psb_info nlm_prom_info;
  57
  58 /* default to uniprocessor */
  59 unsigned int  nlm_threads_per_core = 1;
  60 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
  61 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
  62
  63 static void nlm_linux_exit(void)
  64 {
  65         uint64_t gpiobase;
  66
  67         gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
  68         /* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
  69         nlm_write_reg(gpiobase, GPIO_SWRESET_REG, 1);
  70         for ( ; ; )
  71                 cpu_wait();
  72 }
  73
  74 void __init plat_mem_setup(void)
  75 {
  76         _machine_restart = (void (*)(char *))nlm_linux_exit;
  77         _machine_halt   = nlm_linux_exit;
  78         pm_power_off    = nlm_linux_exit;
  79 }
  80
  81 const char *get_system_type(void)
  82 {
  83         return "Netlogic XLR/XLS Series";
  84 }
  85
  86 unsigned int nlm_get_cpu_frequency(void)
  87 {
  88         return (unsigned int)nlm_prom_info.cpu_frequency;
  89 }
  90
  91 void __init prom_free_prom_memory(void)
  92 {
  93         /* Nothing yet */
  94 }
  95
  96 void nlm_percpu_init(int hwcpuid)
  97 {
  98         if (hwcpuid % 4 == 0)
  99                 xlr_percpu_fmn_init();
 100 }
 101
 102 static void __init build_arcs_cmdline(int *argv)
 103 {
 104         int i, remain, len;
 105         char *arg;
 106
 107         remain = sizeof(arcs_cmdline) - 1;
 108         arcs_cmdline[0] = '\0';
 109         for (i = 0; argv[i] != 0; i++) {
 110                 arg = (char *)(long)argv[i];
 111                 len = strlen(arg);
 112                 if (len + 1 > remain)
 113                         break;
 114                 strcat(arcs_cmdline, arg);
 115                 strcat(arcs_cmdline, " ");
 116                 remain -=  len + 1;
 117         }
 118
 119         /* Add the default options here */
 120         if ((strstr(arcs_cmdline, "console=")) == NULL) {
 121                 arg = "console=ttyS0,38400 ";
 122                 len = strlen(arg);
 123                 if (len > remain)
 124                         goto fail;
 125                 strcat(arcs_cmdline, arg);
 126                 remain -= len;
 127         }
 128 #ifdef CONFIG_BLK_DEV_INITRD
 129         if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
 130                 arg = "rdinit=/sbin/init ";
 131                 len = strlen(arg);
 132                 if (len > remain)
 133                         goto fail;
 134                 strcat(arcs_cmdline, arg);
 135                 remain -= len;
 136         }
 137 #endif
 138         return;
 139 fail:
 140         panic("Cannot add %s, command line too big!", arg);
 141 }
 142
 143 static void prom_add_memory(void)
 144 {
 145         struct nlm_boot_mem_map *bootm;
 146         u64 start, size;
 147         u64 pref_backup = 512;  /* avoid pref walking beyond end */
 148         int i;
 149
 150         bootm = (void *)(long)nlm_prom_info.psb_mem_map;
 151         for (i = 0; i < bootm->nr_map; i++) {
 152                 if (bootm->map[i].type != BOOT_MEM_RAM)
 153                         continue;
 154                 start = bootm->map[i].addr;
 155                 size   = bootm->map[i].size;
 156
 157                 /* Work around for using bootloader mem */
 158                 if (i == 0 && start == 0 && size == 0x0c000000)
 159                         size = 0x0ff00000;
 160
 161                 add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
 162         }
 163 }
 164
 165 static void nlm_init_node(void)
 166 {
 167         struct nlm_soc_info *nodep;
 168
 169         nodep = nlm_current_node();
 170         nodep->picbase = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
 171         nodep->ebase = read_c0_ebase() & MIPS_EBASE_BASE;
 172         spin_lock_init(&nodep->piclock);
 173 }
 174
 175 void __init prom_init(void)
 176 {
 177         int *argv, *envp;               /* passed as 32 bit ptrs */
 178         struct psb_info *prom_infop;
 179         void *reset_vec;
 180 #ifdef CONFIG_SMP
 181         int i;
 182 #endif
 183
 184         /* truncate to 32 bit and sign extend all args */
 185         argv = (int *)(long)(int)fw_arg1;
 186         envp = (int *)(long)(int)fw_arg2;
 187         prom_infop = (struct psb_info *)(long)(int)fw_arg3;
 188
 189         nlm_prom_info = *prom_infop;
 190         nlm_init_node();
 191
 192         /* Update reset entry point with CPU init code */
 193         reset_vec = (void *)CKSEG1ADDR(RESET_VEC_PHYS);
 194         memset(reset_vec, 0, RESET_VEC_SIZE);
 195         memcpy(reset_vec, (void *)nlm_reset_entry,
 196                         (nlm_reset_entry_end - nlm_reset_entry));
 197
 198         build_arcs_cmdline(argv);
 199         prom_add_memory();
 200
 201 #ifdef CONFIG_SMP
 202         for (i = 0; i < 32; i++)
 203                 if (nlm_prom_info.online_cpu_map & (1 << i))
 204                         cpumask_set_cpu(i, &nlm_cpumask);
 205         nlm_wakeup_secondary_cpus();
 206         register_smp_ops(&nlm_smp_ops);
 207 #endif
 208         xlr_board_info_setup();
 209         xlr_percpu_fmn_init();
 210 }