target/linux/brcm63xx/files/arch/mips/bcm63xx/setup.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <linux/delay.h>
  12 #include <linux/bootmem.h>
  13 #include <linux/ioport.h>
  14 #include <linux/pm.h>
  15 #include <asm/bootinfo.h>
  16 #include <asm/time.h>
  17 #include <asm/reboot.h>
  18 #include <asm/cacheflush.h>
  19 #include <bcm63xx_board.h>
  20 #include <bcm63xx_cpu.h>
  21 #include <bcm63xx_regs.h>
  22 #include <bcm63xx_io.h>
  23
  24 void bcm63xx_machine_halt(void)
  25 {
  26         printk(KERN_INFO "System halted\n");
  27         while (1);
  28 }
  29
  30 static void bcm6348_a1_reboot(void)
  31 {
  32         u32 reg;
  33
  34         /* soft reset all blocks */
  35         printk(KERN_INFO "soft-reseting all blocks ...\n");
  36         reg = bcm_perf_readl(PERF_SOFTRESET_REG);
  37         reg &= ~SOFTRESET_6348_ALL;
  38         bcm_perf_writel(reg, PERF_SOFTRESET_REG);
  39         mdelay(10);
  40
  41         reg = bcm_perf_readl(PERF_SOFTRESET_REG);
  42         reg |= SOFTRESET_6348_ALL;
  43         bcm_perf_writel(reg, PERF_SOFTRESET_REG);
  44         mdelay(10);
  45
  46         /* Jump to the power on address. */
  47         printk(KERN_INFO "jumping to reset vector.\n");
  48         /* set high vectors (base at 0xbfc00000 */
  49         set_c0_status(ST0_BEV | ST0_ERL);
  50         /* run uncached in kseg0 */
  51         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
  52         __flush_cache_all();
  53         /* remove all wired TLB entries */
  54         write_c0_wired(0);
  55         __asm__ __volatile__(
  56                 "jr\t%0"
  57                 :
  58                 : "r" (0xbfc00000));
  59         while (1);
  60 }
  61
  62 void bcm63xx_machine_reboot(void)
  63 {
  64         u32 reg;
  65
  66         /* mask and clear all external irq */
  67         reg = bcm_perf_readl(PERF_EXTIRQ_CFG_REG);
  68         reg &= ~EXTIRQ_CFG_MASK_ALL;
  69         reg |= EXTIRQ_CFG_CLEAR_ALL;
  70         bcm_perf_writel(reg, PERF_EXTIRQ_CFG_REG);
  71
  72         if (BCMCPU_IS_6348() && (bcm63xx_get_cpu_rev() == 0xa1))
  73                 bcm6348_a1_reboot();
  74
  75         printk(KERN_INFO "triggering watchdog soft-reset...\n");
  76         bcm_perf_writel(SYS_PLL_SOFT_RESET, PERF_SYS_PLL_CTL_REG);
  77         while (1);
  78 }
  79
  80 static void __bcm63xx_machine_reboot(char *p)
  81 {
  82         bcm63xx_machine_reboot();
  83 }
  84
  85 /*
  86  * return system type in /proc/cpuinfo
  87  */
  88 const char *get_system_type(void)
  89 {
  90         static char buf[128];
  91         snprintf(buf, sizeof (buf), "bcm63xx/%s (0x%04x/0x%04X)",
  92                  board_get_name(),
  93                  bcm63xx_get_cpu_id(), bcm63xx_get_cpu_rev());
  94         return buf;
  95 }
  96
  97 void __init plat_time_init(void)
  98 {
  99         mips_hpt_frequency = bcm63xx_get_cpu_freq() / 2;
 100 }
 101
 102 void __init plat_mem_setup(void)
 103 {
 104         add_memory_region(0, bcm63xx_get_memory_size(), BOOT_MEM_RAM);
 105
 106         _machine_halt = bcm63xx_machine_halt;
 107         _machine_restart = __bcm63xx_machine_reboot;
 108         pm_power_off = bcm63xx_machine_halt;
 109
 110         set_io_port_base(0);
 111         ioport_resource.start = 0;
 112         ioport_resource.end = ~0;
 113
 114         board_setup();
 115 }
 116
 117 int __init bcm63xx_register_devices(void)
 118 {
 119         return board_register_devices();
 120 }
 121
 122 arch_initcall(bcm63xx_register_devices);