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pal4_setup.c

/*
 * Board setup routines for the SBS PalomarIV.
 *
 * Author: Dan Cox
 *
 * 2002 (c) MontaVista, Software, Inc.  This file is licensed under
 * the terms of the GNU General Public License version 2.  This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/time.h>
#include <linux/irq.h>
#include <linux/kdev_t.h>
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>

#include <asm/io.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/machdep.h>

#include <syslib/cpc700.h>

#include "pal4.h"

extern void pal4_find_bridges(void);

unsigned int cpc700_irq_assigns[][2] = {
        {1, 1},    /* IRQ 0: ECC correctable error */
        {1, 1},    /* IRQ 1: PCI write to memory range */
        {0, 1},    /* IRQ 2: PCI write to command register */
        {0, 1},    /* IRQ 3: UART 0 */
        {0, 1},    /* IRQ 4: UART 1 */
        {0, 1},    /* IRQ 5: ICC 0 */
        {0, 1},    /* IRQ 6: ICC 1 */
        {0, 1},    /* IRQ 7: GPT compare 0 */
        {0, 1},    /* IRQ 8: GPT compare 1 */
        {0, 1},    /* IRQ 9: GPT compare 2 */
        {0, 1},    /* IRQ 10: GPT compare 3 */
        {0, 1},    /* IRQ 11: GPT compare 4 */
        {0, 1},    /* IRQ 12: GPT capture 0 */
        {0, 1},    /* IRQ 13: GPT capture 1 */
        {0, 1},    /* IRQ 14: GPT capture 2 */
        {0, 1},    /* IRQ 15: GPT capture 3 */
        {0, 1},    /* IRQ 16: GPT capture 4 */
        {0, 0},    /* IRQ 17: reserved */
        {0, 0},    /* IRQ 18: reserved */
        {0, 0},    /* IRQ 19: reserved */
        {0, 0},    /* IRQ 20: reserved */
        {0, 1},    /* IRQ 21: Ethernet */
        {0, 0},    /* IRQ 22: reserved */
        {0, 0},    /* IRQ 23: reserved */
        {0, 0},    /* IRQ 24: resreved */
        {0, 0},    /* IRQ 25: reserved */
        {0, 0},    /* IRQ 26: reserved */
        {0, 0},    /* IRQ 27: reserved */
        {0, 0},    /* IRQ 28: reserved */
        {0, 0},    /* IRQ 29: reserved */
        {0, 0},    /* IRQ 30: reserved */
        {0, 0},    /* IRQ 31: reserved */
};

static int
pal4_show_cpuinfo(struct seq_file *m)
{
        seq_printf(m, "board\t\t: SBS Palomar IV\n");

        return 0;
}

static void
pal4_restart(char *cmd)
{
        local_irq_disable();
        __asm__ __volatile__("lis  3,0xfff0\n \
                              ori  3,3,0x100\n \
                              mtspr 26,3\n \
                              li   3,0\n \
                              mtspr 27,3\n \
                              rfi");

        for(;;);
}

static void
pal4_power_off(void)
{
      local_irq_disable();
      for(;;);
}

static void
pal4_halt(void)
{
      pal4_power_off();
}

TODC_ALLOC();

static void __init
pal4_setup_arch(void)
{
      unsigned long l2;

      TODC_INIT(TODC_TYPE_MK48T37, 0, 0,
              ioremap(PAL4_NVRAM, PAL4_NVRAM_SIZE), 8);

      pal4_find_bridges();

#ifdef CONFIG_BLK_DEV_INITRD
      if (initrd_start)
            ROOT_DEV = Root_RAM0;
      else
#endif
            ROOT_DEV = Root_NFS;

      /* The L2 gets disabled in the bootloader, but all the proper
         bits should be present from the fw, so just re-enable it */
      l2 = _get_L2CR();
      if (!(l2 & L2CR_L2E)) {
            /* presume that it was initially set if the size is
               still present. */
            if (l2 ^ L2CR_L2SIZ_MASK)
                  _set_L2CR(l2 | L2CR_L2E);
            else
                  printk("L2 not set by firmware; left disabled.\n");
      }
}

static void __init
pal4_map_io(void)
{
      io_block_mapping(0xf0000000, 0xf0000000, 0x10000000, _PAGE_IO);
}

void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
            unsigned long r6, unsigned long r7)
{
      parse_bootinfo(find_bootinfo());

      isa_io_base = 0 /*PAL4_ISA_IO_BASE*/;
      pci_dram_offset = 0 /*PAL4_PCI_SYS_MEM_BASE*/;

      ppc_md.setup_arch = pal4_setup_arch;
      ppc_md.show_cpuinfo = pal4_show_cpuinfo;

      ppc_md.setup_io_mappings = pal4_map_io;

      ppc_md.init_IRQ = cpc700_init_IRQ;
      ppc_md.get_irq = cpc700_get_irq;

      ppc_md.restart = pal4_restart;
      ppc_md.halt = pal4_halt;
      ppc_md.power_off = pal4_power_off;

      ppc_md.time_init = todc_time_init;
      ppc_md.set_rtc_time = todc_set_rtc_time;
      ppc_md.get_rtc_time = todc_get_rtc_time;
      ppc_md.calibrate_decr = todc_calibrate_decr;

      ppc_md.nvram_read_val = todc_direct_read_val;
      ppc_md.nvram_write_val = todc_direct_write_val;
}


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