arch/mips/netlogic/xlp/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/of_fdt.h>
  37
  38 #include <asm/idle.h>
  39 #include <asm/reboot.h>
  40 #include <asm/time.h>
  41 #include <asm/bootinfo.h>
  42
  43 #include <asm/netlogic/haldefs.h>
  44 #include <asm/netlogic/common.h>
  45
  46 #include <asm/netlogic/xlp-hal/iomap.h>
  47 #include <asm/netlogic/xlp-hal/xlp.h>
  48 #include <asm/netlogic/xlp-hal/sys.h>
  49
  50 uint64_t nlm_io_base;
  51 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
  52 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
  53 unsigned int nlm_threads_per_core;
  54
  55 static void nlm_linux_exit(void)
  56 {
  57         uint64_t sysbase = nlm_get_node(0)->sysbase;
  58
  59         if (cpu_is_xlp9xx())
  60                 nlm_write_sys_reg(sysbase, SYS_9XX_CHIP_RESET, 1);
  61         else
  62                 nlm_write_sys_reg(sysbase, SYS_CHIP_RESET, 1);
  63         for ( ; ; )
  64                 cpu_wait();
  65 }
  66
  67 static void nlm_fixup_mem(void)
  68 {
  69         const int pref_backup = 512;
  70         int i;
  71
  72         for (i = 0; i < boot_mem_map.nr_map; i++) {
  73                 if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
  74                         continue;
  75                 boot_mem_map.map[i].size -= pref_backup;
  76         }
  77 }
  78
  79 static void __init xlp_init_mem_from_bars(void)
  80 {
  81         uint64_t map[16];
  82         int i, n;
  83
  84         n = xlp_get_dram_map(-1, map);  /* -1: info for all nodes */
  85         for (i = 0; i < n; i += 2) {
  86                 /* exclude 0x1000_0000-0x2000_0000, u-boot device */
  87                 if (map[i] <= 0x10000000 && map[i+1] > 0x10000000)
  88                         map[i+1] = 0x10000000;
  89                 if (map[i] > 0x10000000 && map[i] < 0x20000000)
  90                         map[i] = 0x20000000;
  91
  92                 add_memory_region(map[i], map[i+1] - map[i], BOOT_MEM_RAM);
  93         }
  94 }
  95
  96 void __init plat_mem_setup(void)
  97 {
  98         panic_timeout   = 5;
  99         _machine_restart = (void (*)(char *))nlm_linux_exit;
 100         _machine_halt   = nlm_linux_exit;
 101         pm_power_off    = nlm_linux_exit;
 102
 103         /* memory and bootargs from DT */
 104         xlp_early_init_devtree();
 105
 106         if (boot_mem_map.nr_map == 0) {
 107                 pr_info("Using DRAM BARs for memory map.\n");
 108                 xlp_init_mem_from_bars();
 109         }
 110         /* Calculate and setup wired entries for mapped kernel */
 111         nlm_fixup_mem();
 112 }
 113
 114 const char *get_system_type(void)
 115 {
 116         switch (read_c0_prid() & 0xff00) {
 117         case PRID_IMP_NETLOGIC_XLP9XX:
 118         case PRID_IMP_NETLOGIC_XLP2XX:
 119                 return "Broadcom XLPII Series";
 120         default:
 121                 return "Netlogic XLP Series";
 122         }
 123 }
 124
 125 void __init prom_free_prom_memory(void)
 126 {
 127         /* Nothing yet */
 128 }
 129
 130 void xlp_mmu_init(void)
 131 {
 132         u32 conf4;
 133
 134         if (cpu_is_xlpii()) {
 135                 /* XLPII series has extended pagesize in config 4 */
 136                 conf4 = read_c0_config4() & ~0x1f00u;
 137                 write_c0_config4(conf4 | ((PAGE_SHIFT - 10) / 2 << 8));
 138         } else {
 139                 /* enable extended TLB and Large Fixed TLB */
 140                 write_c0_config6(read_c0_config6() | 0x24);
 141
 142                 /* set page mask of extended Fixed TLB in config7 */
 143                 write_c0_config7(PM_DEFAULT_MASK >>
 144                         (13 + (ffz(PM_DEFAULT_MASK >> 13) / 2)));
 145         }
 146 }
 147
 148 void nlm_percpu_init(int hwcpuid)
 149 {
 150 }
 151
 152 void __init prom_init(void)
 153 {
 154         void *reset_vec;
 155
 156         nlm_io_base = CKSEG1ADDR(XLP_DEFAULT_IO_BASE);
 157         nlm_init_boot_cpu();
 158         xlp_mmu_init();
 159         nlm_node_init(0);
 160         xlp_dt_init((void *)(long)fw_arg0);
 161
 162         /* Update reset entry point with CPU init code */
 163         reset_vec = (void *)CKSEG1ADDR(RESET_VEC_PHYS);
 164         memset(reset_vec, 0, RESET_VEC_SIZE);
 165         memcpy(reset_vec, (void *)nlm_reset_entry,
 166                         (nlm_reset_entry_end - nlm_reset_entry));
 167
 168 #ifdef CONFIG_SMP
 169         cpumask_setall(&nlm_cpumask);
 170         nlm_wakeup_secondary_cpus();
 171
 172         /* update TLB size after waking up threads */
 173         current_cpu_data.tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
 174
 175         register_smp_ops(&nlm_smp_ops);
 176 #endif
 177 }