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 #include <asm/smp-ops.h>
  43
  44 #include <asm/netlogic/interrupt.h>
  45 #include <asm/netlogic/psb-bootinfo.h>
  46
  47 #include <asm/netlogic/xlr/xlr.h>
  48 #include <asm/netlogic/xlr/iomap.h>
  49 #include <asm/netlogic/xlr/pic.h>
  50 #include <asm/netlogic/xlr/gpio.h>
  51
  52 unsigned long netlogic_io_base = (unsigned long)(DEFAULT_NETLOGIC_IO_BASE);
  53 unsigned long nlm_common_ebase = 0x0;
  54 struct psb_info nlm_prom_info;
  55
  56 static void __init nlm_early_serial_setup(void)
  57 {
  58         struct uart_port s;
  59         nlm_reg_t *uart_base;
  60
  61         uart_base = netlogic_io_mmio(NETLOGIC_IO_UART_0_OFFSET);
  62         memset(&s, 0, sizeof(s));
  63         s.flags         = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
  64         s.iotype        = UPIO_MEM32;
  65         s.regshift      = 2;
  66         s.irq           = PIC_UART_0_IRQ;
  67         s.uartclk       = PIC_CLKS_PER_SEC;
  68         s.serial_in     = nlm_xlr_uart_in;
  69         s.serial_out    = nlm_xlr_uart_out;
  70         s.mapbase       = (unsigned long)uart_base;
  71         s.membase       = (unsigned char __iomem *)uart_base;
  72         early_serial_setup(&s);
  73 }
  74
  75 static void nlm_linux_exit(void)
  76 {
  77         nlm_reg_t *mmio;
  78
  79         mmio = netlogic_io_mmio(NETLOGIC_IO_GPIO_OFFSET);
  80         /* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
  81         netlogic_write_reg(mmio, NETLOGIC_GPIO_SWRESET_REG, 1);
  82         for ( ; ; )
  83                 cpu_wait();
  84 }
  85
  86 void __init plat_mem_setup(void)
  87 {
  88         panic_timeout   = 5;
  89         _machine_restart = (void (*)(char *))nlm_linux_exit;
  90         _machine_halt   = nlm_linux_exit;
  91         pm_power_off    = nlm_linux_exit;
  92 }
  93
  94 const char *get_system_type(void)
  95 {
  96         return "Netlogic XLR/XLS Series";
  97 }
  98
  99 void __init prom_free_prom_memory(void)
 100 {
 101         /* Nothing yet */
 102 }
 103
 104 static void __init build_arcs_cmdline(int *argv)
 105 {
 106         int i, remain, len;
 107         char *arg;
 108
 109         remain = sizeof(arcs_cmdline) - 1;
 110         arcs_cmdline[0] = '\0';
 111         for (i = 0; argv[i] != 0; i++) {
 112                 arg = (char *)(long)argv[i];
 113                 len = strlen(arg);
 114                 if (len + 1 > remain)
 115                         break;
 116                 strcat(arcs_cmdline, arg);
 117                 strcat(arcs_cmdline, " ");
 118                 remain -=  len + 1;
 119         }
 120
 121         /* Add the default options here */
 122         if ((strstr(arcs_cmdline, "console=")) == NULL) {
 123                 arg = "console=ttyS0,38400 ";
 124                 len = strlen(arg);
 125                 if (len > remain)
 126                         goto fail;
 127                 strcat(arcs_cmdline, arg);
 128                 remain -= len;
 129         }
 130 #ifdef CONFIG_BLK_DEV_INITRD
 131         if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
 132                 arg = "rdinit=/sbin/init ";
 133                 len = strlen(arg);
 134                 if (len > remain)
 135                         goto fail;
 136                 strcat(arcs_cmdline, arg);
 137                 remain -= len;
 138         }
 139 #endif
 140         return;
 141 fail:
 142         panic("Cannot add %s, command line too big!", arg);
 143 }
 144
 145 static void prom_add_memory(void)
 146 {
 147         struct nlm_boot_mem_map *bootm;
 148         u64 start, size;
 149         u64 pref_backup = 512;  /* avoid pref walking beyond end */
 150         int i;
 151
 152         bootm = (void *)(long)nlm_prom_info.psb_mem_map;
 153         for (i = 0; i < bootm->nr_map; i++) {
 154                 if (bootm->map[i].type != BOOT_MEM_RAM)
 155                         continue;
 156                 start = bootm->map[i].addr;
 157                 size   = bootm->map[i].size;
 158
 159                 /* Work around for using bootloader mem */
 160                 if (i == 0 && start == 0 && size == 0x0c000000)
 161                         size = 0x0ff00000;
 162
 163                 add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
 164         }
 165 }
 166
 167 void __init prom_init(void)
 168 {
 169         int *argv, *envp;               /* passed as 32 bit ptrs */
 170         struct psb_info *prom_infop;
 171
 172         /* truncate to 32 bit and sign extend all args */
 173         argv = (int *)(long)(int)fw_arg1;
 174         envp = (int *)(long)(int)fw_arg2;
 175         prom_infop = (struct psb_info *)(long)(int)fw_arg3;
 176
 177         nlm_prom_info = *prom_infop;
 178
 179         nlm_early_serial_setup();
 180         build_arcs_cmdline(argv);
 181         nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
 182         prom_add_memory();
 183
 184 #ifdef CONFIG_SMP
 185         nlm_wakeup_secondary_cpus(nlm_prom_info.online_cpu_map);
 186         register_smp_ops(&nlm_smp_ops);
 187 #endif
 188 }