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/reboot.h>
  40 #include <asm/time.h>
  41 #include <asm/bootinfo.h>
  42
  43 #include <asm/netlogic/interrupt.h>
  44 #include <asm/netlogic/psb-bootinfo.h>
  45 #include <asm/netlogic/haldefs.h>
  46 #include <asm/netlogic/common.h>
  47
  48 #include <asm/netlogic/xlr/xlr.h>
  49 #include <asm/netlogic/xlr/iomap.h>
  50 #include <asm/netlogic/xlr/pic.h>
  51 #include <asm/netlogic/xlr/gpio.h>
  52
  53 uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
  54 struct psb_info nlm_prom_info;
  55
  56 /* default to uniprocessor */
  57 unsigned int  nlm_threads_per_core = 1;
  58 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
  59 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
  60
  61 static void __init nlm_early_serial_setup(void)
  62 {
  63         struct uart_port s;
  64         unsigned long uart_base;
  65
  66         uart_base = (unsigned long)nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
  67         memset(&s, 0, sizeof(s));
  68         s.flags         = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
  69         s.iotype        = UPIO_MEM32;
  70         s.regshift      = 2;
  71         s.irq           = PIC_UART_0_IRQ;
  72         s.uartclk       = PIC_CLKS_PER_SEC;
  73         s.serial_in     = nlm_xlr_uart_in;
  74         s.serial_out    = nlm_xlr_uart_out;
  75         s.mapbase       = uart_base;
  76         s.membase       = (unsigned char __iomem *)uart_base;
  77         early_serial_setup(&s);
  78 }
  79
  80 static void nlm_linux_exit(void)
  81 {
  82         uint64_t gpiobase;
  83
  84         gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
  85         /* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
  86         nlm_write_reg(gpiobase, GPIO_SWRESET_REG, 1);
  87         for ( ; ; )
  88                 cpu_wait();
  89 }
  90
  91 void __init plat_mem_setup(void)
  92 {
  93         panic_timeout   = 5;
  94         _machine_restart = (void (*)(char *))nlm_linux_exit;
  95         _machine_halt   = nlm_linux_exit;
  96         pm_power_off    = nlm_linux_exit;
  97 }
  98
  99 const char *get_system_type(void)
 100 {
 101         return "Netlogic XLR/XLS Series";
 102 }
 103
 104 unsigned int nlm_get_cpu_frequency(void)
 105 {
 106         return (unsigned int)nlm_prom_info.cpu_frequency;
 107 }
 108
 109 void __init prom_free_prom_memory(void)
 110 {
 111         /* Nothing yet */
 112 }
 113
 114 static void __init build_arcs_cmdline(int *argv)
 115 {
 116         int i, remain, len;
 117         char *arg;
 118
 119         remain = sizeof(arcs_cmdline) - 1;
 120         arcs_cmdline[0] = '\0';
 121         for (i = 0; argv[i] != 0; i++) {
 122                 arg = (char *)(long)argv[i];
 123                 len = strlen(arg);
 124                 if (len + 1 > remain)
 125                         break;
 126                 strcat(arcs_cmdline, arg);
 127                 strcat(arcs_cmdline, " ");
 128                 remain -=  len + 1;
 129         }
 130
 131         /* Add the default options here */
 132         if ((strstr(arcs_cmdline, "console=")) == NULL) {
 133                 arg = "console=ttyS0,38400 ";
 134                 len = strlen(arg);
 135                 if (len > remain)
 136                         goto fail;
 137                 strcat(arcs_cmdline, arg);
 138                 remain -= len;
 139         }
 140 #ifdef CONFIG_BLK_DEV_INITRD
 141         if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
 142                 arg = "rdinit=/sbin/init ";
 143                 len = strlen(arg);
 144                 if (len > remain)
 145                         goto fail;
 146                 strcat(arcs_cmdline, arg);
 147                 remain -= len;
 148         }
 149 #endif
 150         return;
 151 fail:
 152         panic("Cannot add %s, command line too big!", arg);
 153 }
 154
 155 static void prom_add_memory(void)
 156 {
 157         struct nlm_boot_mem_map *bootm;
 158         u64 start, size;
 159         u64 pref_backup = 512;  /* avoid pref walking beyond end */
 160         int i;
 161
 162         bootm = (void *)(long)nlm_prom_info.psb_mem_map;
 163         for (i = 0; i < bootm->nr_map; i++) {
 164                 if (bootm->map[i].type != BOOT_MEM_RAM)
 165                         continue;
 166                 start = bootm->map[i].addr;
 167                 size   = bootm->map[i].size;
 168
 169                 /* Work around for using bootloader mem */
 170                 if (i == 0 && start == 0 && size == 0x0c000000)
 171                         size = 0x0ff00000;
 172
 173                 add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
 174         }
 175 }
 176
 177 static void nlm_init_node(void)
 178 {
 179         struct nlm_soc_info *nodep;
 180
 181         nodep = nlm_current_node();
 182         nodep->picbase = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
 183         nodep->ebase = read_c0_ebase() & (~((1 << 12) - 1));
 184         spin_lock_init(&nodep->piclock);
 185 }
 186
 187 void __init prom_init(void)
 188 {
 189         int i, *argv, *envp;            /* passed as 32 bit ptrs */
 190         struct psb_info *prom_infop;
 191
 192         /* truncate to 32 bit and sign extend all args */
 193         argv = (int *)(long)(int)fw_arg1;
 194         envp = (int *)(long)(int)fw_arg2;
 195         prom_infop = (struct psb_info *)(long)(int)fw_arg3;
 196
 197         nlm_prom_info = *prom_infop;
 198         nlm_init_node();
 199
 200         nlm_early_serial_setup();
 201         build_arcs_cmdline(argv);
 202         prom_add_memory();
 203
 204 #ifdef CONFIG_SMP
 205         for (i = 0; i < 32; i++)
 206                 if (nlm_prom_info.online_cpu_map & (1 << i))
 207                         cpumask_set_cpu(i, &nlm_cpumask);
 208         nlm_wakeup_secondary_cpus();
 209         register_smp_ops(&nlm_smp_ops);
 210 #endif
 211 }