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 #include <asm/netlogic/xlr/fmn.h>
  53
  54 uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
  55 struct psb_info nlm_prom_info;
  56
  57 /* default to uniprocessor */
  58 unsigned int  nlm_threads_per_core = 1;
  59 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
  60 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
  61
  62 static void __init nlm_early_serial_setup(void)
  63 {
  64         struct uart_port s;
  65         unsigned long uart_base;
  66
  67         uart_base = (unsigned long)nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
  68         memset(&s, 0, sizeof(s));
  69         s.flags         = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
  70         s.iotype        = UPIO_MEM32;
  71         s.regshift      = 2;
  72         s.irq           = PIC_UART_0_IRQ;
  73         s.uartclk       = PIC_CLK_HZ;
  74         s.serial_in     = nlm_xlr_uart_in;
  75         s.serial_out    = nlm_xlr_uart_out;
  76         s.mapbase       = uart_base;
  77         s.membase       = (unsigned char __iomem *)uart_base;
  78         early_serial_setup(&s);
  79 }
  80
  81 static void nlm_linux_exit(void)
  82 {
  83         uint64_t gpiobase;
  84
  85         gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
  86         /* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
  87         nlm_write_reg(gpiobase, GPIO_SWRESET_REG, 1);
  88         for ( ; ; )
  89                 cpu_wait();
  90 }
  91
  92 void __init plat_mem_setup(void)
  93 {
  94         panic_timeout   = 5;
  95         _machine_restart = (void (*)(char *))nlm_linux_exit;
  96         _machine_halt   = nlm_linux_exit;
  97         pm_power_off    = nlm_linux_exit;
  98 }
  99
 100 const char *get_system_type(void)
 101 {
 102         return "Netlogic XLR/XLS Series";
 103 }
 104
 105 unsigned int nlm_get_cpu_frequency(void)
 106 {
 107         return (unsigned int)nlm_prom_info.cpu_frequency;
 108 }
 109
 110 void __init prom_free_prom_memory(void)
 111 {
 112         /* Nothing yet */
 113 }
 114
 115 void nlm_percpu_init(int hwcpuid)
 116 {
 117         if (hwcpuid % 4 == 0)
 118                 xlr_percpu_fmn_init();
 119 }
 120
 121 static void __init build_arcs_cmdline(int *argv)
 122 {
 123         int i, remain, len;
 124         char *arg;
 125
 126         remain = sizeof(arcs_cmdline) - 1;
 127         arcs_cmdline[0] = '\0';
 128         for (i = 0; argv[i] != 0; i++) {
 129                 arg = (char *)(long)argv[i];
 130                 len = strlen(arg);
 131                 if (len + 1 > remain)
 132                         break;
 133                 strcat(arcs_cmdline, arg);
 134                 strcat(arcs_cmdline, " ");
 135                 remain -=  len + 1;
 136         }
 137
 138         /* Add the default options here */
 139         if ((strstr(arcs_cmdline, "console=")) == NULL) {
 140                 arg = "console=ttyS0,38400 ";
 141                 len = strlen(arg);
 142                 if (len > remain)
 143                         goto fail;
 144                 strcat(arcs_cmdline, arg);
 145                 remain -= len;
 146         }
 147 #ifdef CONFIG_BLK_DEV_INITRD
 148         if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
 149                 arg = "rdinit=/sbin/init ";
 150                 len = strlen(arg);
 151                 if (len > remain)
 152                         goto fail;
 153                 strcat(arcs_cmdline, arg);
 154                 remain -= len;
 155         }
 156 #endif
 157         return;
 158 fail:
 159         panic("Cannot add %s, command line too big!", arg);
 160 }
 161
 162 static void prom_add_memory(void)
 163 {
 164         struct nlm_boot_mem_map *bootm;
 165         u64 start, size;
 166         u64 pref_backup = 512;  /* avoid pref walking beyond end */
 167         int i;
 168
 169         bootm = (void *)(long)nlm_prom_info.psb_mem_map;
 170         for (i = 0; i < bootm->nr_map; i++) {
 171                 if (bootm->map[i].type != BOOT_MEM_RAM)
 172                         continue;
 173                 start = bootm->map[i].addr;
 174                 size   = bootm->map[i].size;
 175
 176                 /* Work around for using bootloader mem */
 177                 if (i == 0 && start == 0 && size == 0x0c000000)
 178                         size = 0x0ff00000;
 179
 180                 add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
 181         }
 182 }
 183
 184 static void nlm_init_node(void)
 185 {
 186         struct nlm_soc_info *nodep;
 187
 188         nodep = nlm_current_node();
 189         nodep->picbase = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
 190         nodep->ebase = read_c0_ebase() & (~((1 << 12) - 1));
 191         spin_lock_init(&nodep->piclock);
 192 }
 193
 194 void __init prom_init(void)
 195 {
 196         int *argv, *envp;               /* passed as 32 bit ptrs */
 197         struct psb_info *prom_infop;
 198 #ifdef CONFIG_SMP
 199         int i;
 200 #endif
 201
 202         /* truncate to 32 bit and sign extend all args */
 203         argv = (int *)(long)(int)fw_arg1;
 204         envp = (int *)(long)(int)fw_arg2;
 205         prom_infop = (struct psb_info *)(long)(int)fw_arg3;
 206
 207         nlm_prom_info = *prom_infop;
 208         nlm_init_node();
 209
 210         nlm_early_serial_setup();
 211         build_arcs_cmdline(argv);
 212         prom_add_memory();
 213
 214 #ifdef CONFIG_SMP
 215         for (i = 0; i < 32; i++)
 216                 if (nlm_prom_info.online_cpu_map & (1 << i))
 217                         cpumask_set_cpu(i, &nlm_cpumask);
 218         nlm_wakeup_secondary_cpus();
 219         register_smp_ops(&nlm_smp_ops);
 220 #endif
 221         xlr_board_info_setup();
 222         xlr_percpu_fmn_init();
 223 }