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 uint64_t nlm_pic_base;
  55 struct psb_info nlm_prom_info;
  56
  57 unsigned long nlm_common_ebase = 0x0;
  58
  59 /* default to uniprocessor */
  60 uint32_t nlm_coremask = 1, nlm_cpumask  = 1;
  61 int  nlm_threads_per_core = 1;
  62
  63 static void __init nlm_early_serial_setup(void)
  64 {
  65         struct uart_port s;
  66         unsigned long uart_base;
  67
  68         uart_base = (unsigned long)nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
  69         memset(&s, 0, sizeof(s));
  70         s.flags         = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
  71         s.iotype        = UPIO_MEM32;
  72         s.regshift      = 2;
  73         s.irq           = PIC_UART_0_IRQ;
  74         s.uartclk       = PIC_CLKS_PER_SEC;
  75         s.serial_in     = nlm_xlr_uart_in;
  76         s.serial_out    = nlm_xlr_uart_out;
  77         s.mapbase       = uart_base;
  78         s.membase       = (unsigned char __iomem *)uart_base;
  79         early_serial_setup(&s);
  80 }
  81
  82 static void nlm_linux_exit(void)
  83 {
  84         uint64_t gpiobase;
  85
  86         gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
  87         /* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
  88         nlm_write_reg(gpiobase, NETLOGIC_GPIO_SWRESET_REG, 1);
  89         for ( ; ; )
  90                 cpu_wait();
  91 }
  92
  93 void __init plat_mem_setup(void)
  94 {
  95         panic_timeout   = 5;
  96         _machine_restart = (void (*)(char *))nlm_linux_exit;
  97         _machine_halt   = nlm_linux_exit;
  98         pm_power_off    = nlm_linux_exit;
  99 }
 100
 101 const char *get_system_type(void)
 102 {
 103         return "Netlogic XLR/XLS Series";
 104 }
 105
 106 unsigned int nlm_get_cpu_frequency(void)
 107 {
 108         return (unsigned int)nlm_prom_info.cpu_frequency;
 109 }
 110
 111 void __init prom_free_prom_memory(void)
 112 {
 113         /* Nothing yet */
 114 }
 115
 116 static void __init build_arcs_cmdline(int *argv)
 117 {
 118         int i, remain, len;
 119         char *arg;
 120
 121         remain = sizeof(arcs_cmdline) - 1;
 122         arcs_cmdline[0] = '\0';
 123         for (i = 0; argv[i] != 0; i++) {
 124                 arg = (char *)(long)argv[i];
 125                 len = strlen(arg);
 126                 if (len + 1 > remain)
 127                         break;
 128                 strcat(arcs_cmdline, arg);
 129                 strcat(arcs_cmdline, " ");
 130                 remain -=  len + 1;
 131         }
 132
 133         /* Add the default options here */
 134         if ((strstr(arcs_cmdline, "console=")) == NULL) {
 135                 arg = "console=ttyS0,38400 ";
 136                 len = strlen(arg);
 137                 if (len > remain)
 138                         goto fail;
 139                 strcat(arcs_cmdline, arg);
 140                 remain -= len;
 141         }
 142 #ifdef CONFIG_BLK_DEV_INITRD
 143         if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
 144                 arg = "rdinit=/sbin/init ";
 145                 len = strlen(arg);
 146                 if (len > remain)
 147                         goto fail;
 148                 strcat(arcs_cmdline, arg);
 149                 remain -= len;
 150         }
 151 #endif
 152         return;
 153 fail:
 154         panic("Cannot add %s, command line too big!", arg);
 155 }
 156
 157 static void prom_add_memory(void)
 158 {
 159         struct nlm_boot_mem_map *bootm;
 160         u64 start, size;
 161         u64 pref_backup = 512;  /* avoid pref walking beyond end */
 162         int i;
 163
 164         bootm = (void *)(long)nlm_prom_info.psb_mem_map;
 165         for (i = 0; i < bootm->nr_map; i++) {
 166                 if (bootm->map[i].type != BOOT_MEM_RAM)
 167                         continue;
 168                 start = bootm->map[i].addr;
 169                 size   = bootm->map[i].size;
 170
 171                 /* Work around for using bootloader mem */
 172                 if (i == 0 && start == 0 && size == 0x0c000000)
 173                         size = 0x0ff00000;
 174
 175                 add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
 176         }
 177 }
 178
 179 void __init prom_init(void)
 180 {
 181         int *argv, *envp;               /* passed as 32 bit ptrs */
 182         struct psb_info *prom_infop;
 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_pic_base = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
 191
 192         nlm_early_serial_setup();
 193         build_arcs_cmdline(argv);
 194         nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
 195         prom_add_memory();
 196
 197 #ifdef CONFIG_SMP
 198         nlm_wakeup_secondary_cpus(nlm_prom_info.online_cpu_map);
 199         register_smp_ops(&nlm_smp_ops);
 200 #endif
 201 }