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 __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_CLK_HZ;
  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, 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 void nlm_percpu_init(int hwcpuid)
 117 {
 118         if (hwcpuid % 4 == 0)
 119                 xlr_percpu_fmn_init();
 120 }
 121
 122 static void __init build_arcs_cmdline(int *argv)
 123 {
 124         int i, remain, len;
 125         char *arg;
 126
 127         remain = sizeof(arcs_cmdline) - 1;
 128         arcs_cmdline[0] = '\0';
 129         for (i = 0; argv[i] != 0; i++) {
 130                 arg = (char *)(long)argv[i];
 131                 len = strlen(arg);
 132                 if (len + 1 > remain)
 133                         break;
 134                 strcat(arcs_cmdline, arg);
 135                 strcat(arcs_cmdline, " ");
 136                 remain -=  len + 1;
 137         }
 138
 139         /* Add the default options here */
 140         if ((strstr(arcs_cmdline, "console=")) == NULL) {
 141                 arg = "console=ttyS0,38400 ";
 142                 len = strlen(arg);
 143                 if (len > remain)
 144                         goto fail;
 145                 strcat(arcs_cmdline, arg);
 146                 remain -= len;
 147         }
 148 #ifdef CONFIG_BLK_DEV_INITRD
 149         if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
 150                 arg = "rdinit=/sbin/init ";
 151                 len = strlen(arg);
 152                 if (len > remain)
 153                         goto fail;
 154                 strcat(arcs_cmdline, arg);
 155                 remain -= len;
 156         }
 157 #endif
 158         return;
 159 fail:
 160         panic("Cannot add %s, command line too big!", arg);
 161 }
 162
 163 static void prom_add_memory(void)
 164 {
 165         struct nlm_boot_mem_map *bootm;
 166         u64 start, size;
 167         u64 pref_backup = 512;  /* avoid pref walking beyond end */
 168         int i;
 169
 170         bootm = (void *)(long)nlm_prom_info.psb_mem_map;
 171         for (i = 0; i < bootm->nr_map; i++) {
 172                 if (bootm->map[i].type != BOOT_MEM_RAM)
 173                         continue;
 174                 start = bootm->map[i].addr;
 175                 size   = bootm->map[i].size;
 176
 177                 /* Work around for using bootloader mem */
 178                 if (i == 0 && start == 0 && size == 0x0c000000)
 179                         size = 0x0ff00000;
 180
 181                 add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
 182         }
 183 }
 184
 185 static void nlm_init_node(void)
 186 {
 187         struct nlm_soc_info *nodep;
 188
 189         nodep = nlm_current_node();
 190         nodep->picbase = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
 191         nodep->ebase = read_c0_ebase() & (~((1 << 12) - 1));
 192         spin_lock_init(&nodep->piclock);
 193 }
 194
 195 void __init prom_init(void)
 196 {
 197         int *argv, *envp;               /* passed as 32 bit ptrs */
 198         struct psb_info *prom_infop;
 199         void *reset_vec;
 200 #ifdef CONFIG_SMP
 201         int i;
 202 #endif
 203
 204         /* truncate to 32 bit and sign extend all args */
 205         argv = (int *)(long)(int)fw_arg1;
 206         envp = (int *)(long)(int)fw_arg2;
 207         prom_infop = (struct psb_info *)(long)(int)fw_arg3;
 208
 209         nlm_prom_info = *prom_infop;
 210         nlm_init_node();
 211
 212         /* Update reset entry point with CPU init code */
 213         reset_vec = (void *)CKSEG1ADDR(RESET_VEC_PHYS);
 214         memset(reset_vec, 0, RESET_VEC_SIZE);
 215         memcpy(reset_vec, (void *)nlm_reset_entry,
 216                         (nlm_reset_entry_end - nlm_reset_entry));
 217
 218         nlm_early_serial_setup();
 219         build_arcs_cmdline(argv);
 220         prom_add_memory();
 221
 222 #ifdef CONFIG_SMP
 223         for (i = 0; i < 32; i++)
 224                 if (nlm_prom_info.online_cpu_map & (1 << i))
 225                         cpumask_set_cpu(i, &nlm_cpumask);
 226         nlm_wakeup_secondary_cpus();
 227         register_smp_ops(&nlm_smp_ops);
 228 #endif
 229         xlr_board_info_setup();
 230         xlr_percpu_fmn_init();
 231 }