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 unsigned int xlp_cores_per_node;
  55
  56 static void nlm_linux_exit(void)
  57 {
  58         uint64_t sysbase = nlm_get_node(0)->sysbase;
  59
  60         if (cpu_is_xlp9xx())
  61                 nlm_write_sys_reg(sysbase, SYS_9XX_CHIP_RESET, 1);
  62         else
  63                 nlm_write_sys_reg(sysbase, SYS_CHIP_RESET, 1);
  64         for ( ; ; )
  65                 cpu_wait();
  66 }
  67
  68 static void nlm_fixup_mem(void)
  69 {
  70         const int pref_backup = 512;
  71         int i;
  72
  73         for (i = 0; i < boot_mem_map.nr_map; i++) {
  74                 if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
  75                         continue;
  76                 boot_mem_map.map[i].size -= pref_backup;
  77         }
  78 }
  79
  80 static void __init xlp_init_mem_from_bars(void)
  81 {
  82         uint64_t map[16];
  83         int i, n;
  84
  85         n = xlp_get_dram_map(-1, map);  /* -1: info for all nodes */
  86         for (i = 0; i < n; i += 2) {
  87                 /* exclude 0x1000_0000-0x2000_0000, u-boot device */
  88                 if (map[i] <= 0x10000000 && map[i+1] > 0x10000000)
  89                         map[i+1] = 0x10000000;
  90                 if (map[i] > 0x10000000 && map[i] < 0x20000000)
  91                         map[i] = 0x20000000;
  92
  93                 add_memory_region(map[i], map[i+1] - map[i], BOOT_MEM_RAM);
  94         }
  95 }
  96
  97 void __init plat_mem_setup(void)
  98 {
  99 #ifdef CONFIG_SMP
 100         nlm_wakeup_secondary_cpus();
 101
 102         /* update TLB size after waking up threads */
 103         current_cpu_data.tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
 104
 105         register_smp_ops(&nlm_smp_ops);
 106 #endif
 107         _machine_restart = (void (*)(char *))nlm_linux_exit;
 108         _machine_halt   = nlm_linux_exit;
 109         pm_power_off    = nlm_linux_exit;
 110
 111         /* memory and bootargs from DT */
 112         xlp_early_init_devtree();
 113
 114         if (boot_mem_map.nr_map == 0) {
 115                 pr_info("Using DRAM BARs for memory map.\n");
 116                 xlp_init_mem_from_bars();
 117         }
 118         /* Calculate and setup wired entries for mapped kernel */
 119         nlm_fixup_mem();
 120 }
 121
 122 const char *get_system_type(void)
 123 {
 124         switch (read_c0_prid() & 0xff00) {
 125         case PRID_IMP_NETLOGIC_XLP9XX:
 126         case PRID_IMP_NETLOGIC_XLP2XX:
 127                 return "Broadcom XLPII Series";
 128         default:
 129                 return "Netlogic XLP Series";
 130         }
 131 }
 132
 133 void __init prom_free_prom_memory(void)
 134 {
 135         /* Nothing yet */
 136 }
 137
 138 void xlp_mmu_init(void)
 139 {
 140         u32 conf4;
 141
 142         if (cpu_is_xlpii()) {
 143                 /* XLPII series has extended pagesize in config 4 */
 144                 conf4 = read_c0_config4() & ~0x1f00u;
 145                 write_c0_config4(conf4 | ((PAGE_SHIFT - 10) / 2 << 8));
 146         } else {
 147                 /* enable extended TLB and Large Fixed TLB */
 148                 write_c0_config6(read_c0_config6() | 0x24);
 149
 150                 /* set page mask of extended Fixed TLB in config7 */
 151                 write_c0_config7(PM_DEFAULT_MASK >>
 152                         (13 + (ffz(PM_DEFAULT_MASK >> 13) / 2)));
 153         }
 154 }
 155
 156 void nlm_percpu_init(int hwcpuid)
 157 {
 158 }
 159
 160 void __init prom_init(void)
 161 {
 162         void *reset_vec;
 163
 164         nlm_io_base = CKSEG1ADDR(XLP_DEFAULT_IO_BASE);
 165         if (cpu_is_xlp9xx())
 166                 xlp_cores_per_node = 32;
 167         else
 168                 xlp_cores_per_node = 8;
 169         nlm_init_boot_cpu();
 170         xlp_mmu_init();
 171         nlm_node_init(0);
 172         xlp_dt_init((void *)(long)fw_arg0);
 173
 174         /* Update reset entry point with CPU init code */
 175         reset_vec = (void *)CKSEG1ADDR(RESET_VEC_PHYS);
 176         memset(reset_vec, 0, RESET_VEC_SIZE);
 177         memcpy(reset_vec, (void *)nlm_reset_entry,
 178                         (nlm_reset_entry_end - nlm_reset_entry));
 179
 180 #ifdef CONFIG_SMP
 181         cpumask_setall(&nlm_cpumask);
 182 #endif
 183 }