[PATCH] ppc32: Add support for MPC8245 8250 serial ports on Sandpoint

[linux-2.6/kvm.git] / arch / ppc / platforms / sandpoint.c

/*
 * arch/ppc/platforms/sandpoint_setup.c
 *
 * Board setup routines for the Motorola SPS Sandpoint Test Platform.
 *
 * Author: Mark A. Greer
 *       mgreer@mvista.com
 *
 * 2000-2003 (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.
 */

/*
 * This file adds support for the Motorola SPS Sandpoint Test Platform.
 * These boards have a PPMC slot for the processor so any combination
 * of cpu and host bridge can be attached.  This port is for an 8240 PPMC
 * module from Motorola SPS and other closely related cpu/host bridge
 * combinations (e.g., 750/755/7400 with MPC107 host bridge).
 * The sandpoint itself has a Windbond 83c553 (PCI-ISA bridge, 2 DMA ctlrs, 2
 * cascaded 8259 interrupt ctlrs, 8254 Timer/Counter, and an IDE ctlr), a
 * National 87308 (RTC, 2 UARTs, Keyboard & mouse ctlrs, and a floppy ctlr),
 * and 4 PCI slots (only 2 of which are usable; the other 2 are keyed for 3.3V
 * but are really 5V).
 *
 * The firmware on the sandpoint is called DINK (not my acronym :).  This port
 * depends on DINK to do some basic initialization (e.g., initialize the memory
 * ctlr) and to ensure that the processor is using MAP B (CHRP map).
 *
 * The switch settings for the Sandpoint board MUST be as follows:
 *      S3: down
 *      S4: up
 *      S5: up
 *      S6: down
 *
 * 'down' is in the direction from the PCI slots towards the PPMC slot;
 * 'up' is in the direction from the PPMC slot towards the PCI slots.
 * Be careful, the way the sandpoint board is installed in XT chasses will
 * make the directions reversed.
 *
 * Since Motorola listened to our suggestions for improvement, we now have
 * the Sandpoint X3 board.  All of the PCI slots are available, it uses
 * the serial interrupt interface (just a hardware thing we need to
 * configure properly).
 *
 * Use the default X3 switch settings.  The interrupts are then:
 *              EPIC    Source
 *                0     SIOINT          (8259, active low)
 *                1     PCI #1
 *                2     PCI #2
 *                3     PCI #3
 *                4     PCI #4
 *                7     Winbond INTC    (IDE interrupt)
 *                8     Winbond INTD    (IDE interrupt)
 *
 *
 * Motorola has finally released a version of DINK32 that correctly
 * (seemingly) initalizes the memory controller correctly, regardless
 * of the amount of memory in the system.  Once a method of determining
 * what version of DINK initializes the system for us, if applicable, is
 * found, we can hopefully stop hardcoding 32MB of RAM.
 */

#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/tty.h>  /* for linux/serial_core.h */
#include <linux/serial_core.h>
#include <linux/serial_8250.h>

#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/time.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/smp.h>
#include <asm/vga.h>
#include <asm/open_pic.h>
#include <asm/i8259.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/mpc10x.h>
#include <asm/pci-bridge.h>
#include <asm/kgdb.h>
#include <asm/ppc_sys.h>

#include "sandpoint.h"

/* Set non-zero if an X2 Sandpoint detected. */
static int sandpoint_is_x2;

unsigned char __res[sizeof(bd_t)];

static void sandpoint_halt(void);
static void sandpoint_probe_type(void);

/*
 * Define all of the IRQ senses and polarities.  Taken from the
 * Sandpoint X3 User's manual.
 */
static u_char sandpoint_openpic_initsenses[] __initdata = {
        (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 0: SIOINT */
        (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 2: PCI Slot 1 */
        (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 3: PCI Slot 2 */
        (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 4: PCI Slot 3 */
        (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 5: PCI Slot 4 */
        (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 8: IDE (INT C) */
        (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE)       /* 9: IDE (INT D) */
};

/*
 * Motorola SPS Sandpoint interrupt routing.
 */
static inline int
x3_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
        static char pci_irq_table[][4] =
        /*
         *      PCI IDSEL/INTPIN->INTLINE
         *         A   B   C   D
         */
        {
                { 16,  0,  0,  0 },     /* IDSEL 11 - i8259 on Winbond */
                {  0,  0,  0,  0 },     /* IDSEL 12 - unused */
                { 18, 21, 20, 19 },     /* IDSEL 13 - PCI slot 1 */
                { 19, 18, 21, 20 },     /* IDSEL 14 - PCI slot 2 */
                { 20, 19, 18, 21 },     /* IDSEL 15 - PCI slot 3 */
                { 21, 20, 19, 18 },     /* IDSEL 16 - PCI slot 4 */
        };

        const long min_idsel = 11, max_idsel = 16, irqs_per_slot = 4;
        return PCI_IRQ_TABLE_LOOKUP;
}

static inline int
x2_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
        static char pci_irq_table[][4] =
        /*
         *      PCI IDSEL/INTPIN->INTLINE
         *         A   B   C   D
         */
        {
                { 18,  0,  0,  0 },     /* IDSEL 11 - i8259 on Windbond */
                {  0,  0,  0,  0 },     /* IDSEL 12 - unused */
                { 16, 17, 18, 19 },     /* IDSEL 13 - PCI slot 1 */
                { 17, 18, 19, 16 },     /* IDSEL 14 - PCI slot 2 */
                { 18, 19, 16, 17 },     /* IDSEL 15 - PCI slot 3 */
                { 19, 16, 17, 18 },     /* IDSEL 16 - PCI slot 4 */
        };

        const long min_idsel = 11, max_idsel = 16, irqs_per_slot = 4;
        return PCI_IRQ_TABLE_LOOKUP;
}

static void __init
sandpoint_setup_winbond_83553(struct pci_controller *hose)
{
        int             devfn;

        /*
         * Route IDE interrupts directly to the 8259's IRQ 14 & 15.
         * We can't route the IDE interrupt to PCI INTC# or INTD# because those
         * woule interfere with the PMC's INTC# and INTD# lines.
         */
        /*
         * Winbond Fcn 0
         */
        devfn = PCI_DEVFN(11,0);

        early_write_config_byte(hose,
                                0,
                                devfn,
                                0x43, /* IDE Interrupt Routing Control */
                                0xef);
        early_write_config_word(hose,
                                0,
                                devfn,
                                0x44, /* PCI Interrupt Routing Control */
                                0x0000);

        /* Want ISA memory cycles to be forwarded to PCI bus */
        early_write_config_byte(hose,
                                0,
                                devfn,
                                0x48, /* ISA-to-PCI Addr Decoder Control */
                                0xf0);

        /* Enable Port 92.  */
        early_write_config_byte(hose,
                                0,
                                devfn,
                                0x4e,   /* AT System Control Register */
                                0x06);
        /*
         * Winbond Fcn 1
         */
        devfn = PCI_DEVFN(11,1);

        /* Put IDE controller into native mode. */
        early_write_config_byte(hose,
                                0,
                                devfn,
                                0x09,   /* Programming interface Register */
                                0x8f);

        /* Init IRQ routing, enable both ports, disable fast 16 */
        early_write_config_dword(hose,
                                0,
                                devfn,
                                0x40,   /* IDE Control/Status Register */
                                0x00ff0011);
        return;
}

/* On the sandpoint X2, we must avoid sending configuration cycles to
 * device #12 (IDSEL addr = AD12).
 */
static int
x2_exclude_device(u_char bus, u_char devfn)
{
        if ((bus == 0) && (PCI_SLOT(devfn) == SANDPOINT_HOST_BRIDGE_IDSEL))
                return PCIBIOS_DEVICE_NOT_FOUND;
        else
                return PCIBIOS_SUCCESSFUL;
}

static void __init
sandpoint_find_bridges(void)
{
        struct pci_controller   *hose;

        hose = pcibios_alloc_controller();

        if (!hose)
                return;

        hose->first_busno = 0;
        hose->last_busno = 0xff;

        if (mpc10x_bridge_init(hose,
                               MPC10X_MEM_MAP_B,
                               MPC10X_MEM_MAP_B,
                               MPC10X_MAPB_EUMB_BASE) == 0) {

                /* Do early winbond init, then scan PCI bus */
                sandpoint_setup_winbond_83553(hose);
                hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);

                ppc_md.pcibios_fixup = NULL;
                ppc_md.pcibios_fixup_bus = NULL;
                ppc_md.pci_swizzle = common_swizzle;
                if (sandpoint_is_x2) {
                        ppc_md.pci_map_irq = x2_map_irq;
                        ppc_md.pci_exclude_device = x2_exclude_device;
                } else
                        ppc_md.pci_map_irq = x3_map_irq;
        }
        else {
                if (ppc_md.progress)
                        ppc_md.progress("Bridge init failed", 0x100);
                printk("Host bridge init failed\n");
        }

        return;
}

static void __init
sandpoint_setup_arch(void)
{
        /* Probe for Sandpoint model */
        sandpoint_probe_type();
        if (sandpoint_is_x2)
                epic_serial_mode = 0;

        loops_per_jiffy = 100000000 / HZ;

#ifdef CONFIG_BLK_DEV_INITRD
        if (initrd_start)
                ROOT_DEV = Root_RAM0;
        else
#endif
#ifdef  CONFIG_ROOT_NFS
                ROOT_DEV = Root_NFS;
#else
                ROOT_DEV = Root_HDA1;
#endif

        /* Lookup PCI host bridges */
        sandpoint_find_bridges();

        if (strncmp (cur_ppc_sys_spec->ppc_sys_name, "8245", 4) == 0)
        {
                bd_t *bp = (bd_t *)__res;
                struct plat_serial8250_port *pdata;
                pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC10X_DUART);

                if (pdata)
                {
                        pdata[0].uartclk = bp->bi_busfreq;
                        pdata[0].membase = ioremap(pdata[0].mapbase, 0x100);

                        /* this disables the 2nd serial port on the DUART
                         * since the sandpoint does not have it connected */
                        pdata[1].uartclk = 0;
                        pdata[1].irq = 0;
                        pdata[1].mapbase = 0;
                }

        printk(KERN_INFO "Motorola SPS Sandpoint Test Platform\n");
        printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");

        /* DINK32 12.3 and below do not correctly enable any caches.
         * We will do this now with good known values.  Future versions
         * of DINK32 are supposed to get this correct.
         */
        if (cpu_has_feature(CPU_FTR_SPEC7450))
                /* 745x is different.  We only want to pass along enable. */
                _set_L2CR(L2CR_L2E);
        else if (cpu_has_feature(CPU_FTR_L2CR))
                /* All modules have 1MB of L2.  We also assume that an
                 * L2 divisor of 3 will work.
                 */
                _set_L2CR(L2CR_L2E | L2CR_L2SIZ_1MB | L2CR_L2CLK_DIV3
                                | L2CR_L2RAM_PIPE | L2CR_L2OH_1_0 | L2CR_L2DF);
#if 0
        /* Untested right now. */
        if (cpu_has_feature(CPU_FTR_L3CR)) {
                /* Magic value. */
                _set_L3CR(0x8f032000);
        }
#endif
}

#define SANDPOINT_87308_CFG_ADDR                0x15c
#define SANDPOINT_87308_CFG_DATA                0x15d

#define SANDPOINT_87308_CFG_INB(addr, byte) {                           \
        outb((addr), SANDPOINT_87308_CFG_ADDR);                         \
        (byte) = inb(SANDPOINT_87308_CFG_DATA);                         \
}

#define SANDPOINT_87308_CFG_OUTB(addr, byte) {                          \
        outb((addr), SANDPOINT_87308_CFG_ADDR);                         \
        outb((byte), SANDPOINT_87308_CFG_DATA);                         \
}

#define SANDPOINT_87308_SELECT_DEV(dev_num) {                           \
        SANDPOINT_87308_CFG_OUTB(0x07, (dev_num));                      \
}

#define SANDPOINT_87308_DEV_ENABLE(dev_num) {                           \
        SANDPOINT_87308_SELECT_DEV(dev_num);                            \
        SANDPOINT_87308_CFG_OUTB(0x30, 0x01);                           \
}

/*
 * To probe the Sandpoint type, we need to check for a connection between GPIO
 * pins 6 and 7 on the NS87308 SuperIO.
 */
static void __init sandpoint_probe_type(void)
{
        u8 x;
        /* First, ensure that the GPIO pins are enabled. */
        SANDPOINT_87308_SELECT_DEV(0x07); /* Select GPIO logical device */
        SANDPOINT_87308_CFG_OUTB(0x60, 0x07); /* Base address 0x700 */
        SANDPOINT_87308_CFG_OUTB(0x61, 0x00);
        SANDPOINT_87308_CFG_OUTB(0x30, 0x01); /* Enable */

        /* Now, set pin 7 to output and pin 6 to input. */
        outb((inb(0x701) | 0x80) & 0xbf, 0x701);
        /* Set push-pull output */
        outb(inb(0x702) | 0x80, 0x702);
        /* Set pull-up on input */
        outb(inb(0x703) | 0x40, 0x703);
        /* Set output high and check */
        x = inb(0x700);
        outb(x | 0x80, 0x700);
        x = inb(0x700);
        sandpoint_is_x2 = ! (x & 0x40);
        if (ppc_md.progress && sandpoint_is_x2)
                ppc_md.progress("High output says X2", 0);
        /* Set output low and check */
        outb(x & 0x7f, 0x700);
        sandpoint_is_x2 |= inb(0x700) & 0x40;
        if (ppc_md.progress && sandpoint_is_x2)
                ppc_md.progress("Low output says X2", 0);
        if (ppc_md.progress && ! sandpoint_is_x2)
                ppc_md.progress("Sandpoint is X3", 0);
}

/*
 * Fix IDE interrupts.
 */
static int __init
sandpoint_fix_winbond_83553(void)
{
        /* Make some 8259 interrupt level sensitive */
        outb(0xe0, 0x4d0);
        outb(0xde, 0x4d1);

        return 0;
}

arch_initcall(sandpoint_fix_winbond_83553);

/*
 * Initialize the ISA devices on the Nat'l PC87308VUL SuperIO chip.
 */
static int __init
sandpoint_setup_natl_87308(void)
{
        u_char  reg;

        /*
         * Enable all the devices on the Super I/O chip.
         */
        SANDPOINT_87308_SELECT_DEV(0x00); /* Select kbd logical device */
        SANDPOINT_87308_CFG_OUTB(0xf0, 0x00); /* Set KBC clock to 8 Mhz */
        SANDPOINT_87308_DEV_ENABLE(0x00); /* Enable keyboard */
        SANDPOINT_87308_DEV_ENABLE(0x01); /* Enable mouse */
        SANDPOINT_87308_DEV_ENABLE(0x02); /* Enable rtc */
        SANDPOINT_87308_DEV_ENABLE(0x03); /* Enable fdc (floppy) */
        SANDPOINT_87308_DEV_ENABLE(0x04); /* Enable parallel */
        SANDPOINT_87308_DEV_ENABLE(0x05); /* Enable UART 2 */
        SANDPOINT_87308_CFG_OUTB(0xf0, 0x82); /* Enable bank select regs */
        SANDPOINT_87308_DEV_ENABLE(0x06); /* Enable UART 1 */
        SANDPOINT_87308_CFG_OUTB(0xf0, 0x82); /* Enable bank select regs */

        /* Set up floppy in PS/2 mode */
        outb(0x09, SIO_CONFIG_RA);
        reg = inb(SIO_CONFIG_RD);
        reg = (reg & 0x3F) | 0x40;
        outb(reg, SIO_CONFIG_RD);
        outb(reg, SIO_CONFIG_RD);       /* Have to write twice to change! */

        return 0;
}

arch_initcall(sandpoint_setup_natl_87308);

static int __init
sandpoint_request_io(void)
{
        request_region(0x00,0x20,"dma1");
        request_region(0x20,0x20,"pic1");
        request_region(0x40,0x20,"timer");
        request_region(0x80,0x10,"dma page reg");
        request_region(0xa0,0x20,"pic2");
        request_region(0xc0,0x20,"dma2");

        return 0;
}

arch_initcall(sandpoint_request_io);

/*
 * Interrupt setup and service.  Interrrupts on the Sandpoint come
 * from the four PCI slots plus the 8259 in the Winbond Super I/O (SIO).
 * The 8259 is cascaded from EPIC IRQ0, IRQ1-4 map to PCI slots 1-4,
 * IDE is on EPIC 7 and 8.
 */
static void __init
sandpoint_init_IRQ(void)
{
        int i;

        OpenPIC_InitSenses = sandpoint_openpic_initsenses;
        OpenPIC_NumInitSenses = sizeof(sandpoint_openpic_initsenses);

        mpc10x_set_openpic();
        openpic_hookup_cascade(sandpoint_is_x2 ? 17 : NUM_8259_INTERRUPTS, "82c59 cascade",
                        i8259_irq);

        /*
         * openpic_init() has set up irq_desc[16-31] to be openpic
         * interrupts.  We need to set irq_desc[0-15] to be i8259
         * interrupts.
         */
        for(i=0; i < NUM_8259_INTERRUPTS; i++)
                irq_desc[i].handler = &i8259_pic;

        /*
         * The EPIC allows for a read in the range of 0xFEF00000 ->
         * 0xFEFFFFFF to generate a PCI interrupt-acknowledge transaction.
         */
        i8259_init(0xfef00000);
}

static u32
sandpoint_irq_canonicalize(u32 irq)
{
        if (irq == 2)
                return 9;
        else
                return irq;
}

static unsigned long __init
sandpoint_find_end_of_memory(void)
{
        bd_t *bp = (bd_t *)__res;

        if (bp->bi_memsize)
                return bp->bi_memsize;

        /* DINK32 13.0 correctly initalizes things, so iff you use
         * this you _should_ be able to change this instead of a
         * hardcoded value. */
#if 0
        return mpc10x_get_mem_size(MPC10X_MEM_MAP_B);
#else
        return 32*1024*1024;
#endif
}

static void __init
sandpoint_map_io(void)
{
        io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
}

static void
sandpoint_restart(char *cmd)
{
        local_irq_disable();

        /* Set exception prefix high - to the firmware */
        _nmask_and_or_msr(0, MSR_IP);

        /* Reset system via Port 92 */
        outb(0x00, 0x92);
        outb(0x01, 0x92);
        for(;;);        /* Spin until reset happens */
}

static void
sandpoint_power_off(void)
{
        local_irq_disable();
        for(;;);        /* No way to shut power off with software */
        /* NOTREACHED */
}

static void
sandpoint_halt(void)
{
        sandpoint_power_off();
        /* NOTREACHED */
}

static int
sandpoint_show_cpuinfo(struct seq_file *m)
{
        seq_printf(m, "vendor\t\t: Motorola SPS\n");
        seq_printf(m, "machine\t\t: Sandpoint\n");

        return 0;
}

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
/*
 * IDE support.
 */
static int              sandpoint_ide_ports_known = 0;
static unsigned long    sandpoint_ide_regbase[MAX_HWIFS];
static unsigned long    sandpoint_ide_ctl_regbase[MAX_HWIFS];
static unsigned long    sandpoint_idedma_regbase;

static void
sandpoint_ide_probe(void)
{
        struct pci_dev *pdev = pci_get_device(PCI_VENDOR_ID_WINBOND,
                        PCI_DEVICE_ID_WINBOND_82C105, NULL);

        if (pdev) {
                sandpoint_ide_regbase[0]=pdev->resource[0].start;
                sandpoint_ide_regbase[1]=pdev->resource[2].start;
                sandpoint_ide_ctl_regbase[0]=pdev->resource[1].start;
                sandpoint_ide_ctl_regbase[1]=pdev->resource[3].start;
                sandpoint_idedma_regbase=pdev->resource[4].start;
                pci_dev_put(pdev);
        }

        sandpoint_ide_ports_known = 1;
}

static int
sandpoint_ide_default_irq(unsigned long base)
{
        if (sandpoint_ide_ports_known == 0)
                sandpoint_ide_probe();

        if (base == sandpoint_ide_regbase[0])
                return SANDPOINT_IDE_INT0;
        else if (base == sandpoint_ide_regbase[1])
                return SANDPOINT_IDE_INT1;
        else
                return 0;
}

static unsigned long
sandpoint_ide_default_io_base(int index)
{
        if (sandpoint_ide_ports_known == 0)
                sandpoint_ide_probe();

        return sandpoint_ide_regbase[index];
}

static void __init
sandpoint_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port,
                unsigned long ctrl_port, int *irq)
{
        unsigned long reg = data_port;
        uint    alt_status_base;
        int     i;

        for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
                hw->io_ports[i] = reg++;
        }

        if (data_port == sandpoint_ide_regbase[0]) {
                alt_status_base = sandpoint_ide_ctl_regbase[0] + 2;
                hw->irq = 14;
        }
        else if (data_port == sandpoint_ide_regbase[1]) {
                alt_status_base = sandpoint_ide_ctl_regbase[1] + 2;
                hw->irq = 15;
        }
        else {
                alt_status_base = 0;
                hw->irq = 0;
        }

        if (ctrl_port) {
                hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
        } else {
                hw->io_ports[IDE_CONTROL_OFFSET] = alt_status_base;
        }

        if (irq != NULL) {
                *irq = hw->irq;
        }
}
#endif

/*
 * Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
 */
static __inline__ void
sandpoint_set_bat(void)
{
        unsigned long bat3u, bat3l;

        __asm__ __volatile__(
                        " lis %0,0xf800\n       \
                        ori %1,%0,0x002a\n      \
                        ori %0,%0,0x0ffe\n      \
                        mtspr 0x21e,%0\n        \
                        mtspr 0x21f,%1\n        \
                        isync\n                 \
                        sync "
                        : "=r" (bat3u), "=r" (bat3l));
}

TODC_ALLOC();

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

        /* ASSUMPTION:  If both r3 (bd_t pointer) and r6 (cmdline pointer)
         * are non-zero, then we should use the board info from the bd_t
         * structure and the cmdline pointed to by r6 instead of the
         * information from birecs, if any.  Otherwise, use the information
         * from birecs as discovered by the preceeding call to
         * parse_bootinfo().  This rule should work with both PPCBoot, which
         * uses a bd_t board info structure, and the kernel boot wrapper,
         * which uses birecs.
         */
        if (r3 && r6) {
                /* copy board info structure */
                memcpy( (void *)__res,(void *)(r3+KERNELBASE), sizeof(bd_t) );
                /* copy command line */
                *(char *)(r7+KERNELBASE) = 0;
                strcpy(cmd_line, (char *)(r6+KERNELBASE));
        }

#ifdef CONFIG_BLK_DEV_INITRD
        /* take care of initrd if we have one */
        if (r4) {
                initrd_start = r4 + KERNELBASE;
                initrd_end = r5 + KERNELBASE;
        }
#endif /* CONFIG_BLK_DEV_INITRD */

        /* Map in board regs, etc. */
        sandpoint_set_bat();

        isa_io_base = MPC10X_MAPB_ISA_IO_BASE;
        isa_mem_base = MPC10X_MAPB_ISA_MEM_BASE;
        pci_dram_offset = MPC10X_MAPB_DRAM_OFFSET;
        ISA_DMA_THRESHOLD = 0x00ffffff;
        DMA_MODE_READ = 0x44;
        DMA_MODE_WRITE = 0x48;

        ppc_md.setup_arch = sandpoint_setup_arch;
        ppc_md.show_cpuinfo = sandpoint_show_cpuinfo;
        ppc_md.irq_canonicalize = sandpoint_irq_canonicalize;
        ppc_md.init_IRQ = sandpoint_init_IRQ;
        ppc_md.get_irq = openpic_get_irq;

        ppc_md.restart = sandpoint_restart;
        ppc_md.power_off = sandpoint_power_off;
        ppc_md.halt = sandpoint_halt;

        ppc_md.find_end_of_memory = sandpoint_find_end_of_memory;
        ppc_md.setup_io_mappings = sandpoint_map_io;

        TODC_INIT(TODC_TYPE_PC97307, 0x70, 0x00, 0x71, 8);
        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_mc146818_read_val;
        ppc_md.nvram_write_val = todc_mc146818_write_val;

#ifdef CONFIG_KGDB
        ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
#endif
#ifdef CONFIG_SERIAL_TEXT_DEBUG
        ppc_md.progress = gen550_progress;
#endif

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
        ppc_ide_md.default_irq = sandpoint_ide_default_irq;
        ppc_ide_md.default_io_base = sandpoint_ide_default_io_base;
        ppc_ide_md.ide_init_hwif = sandpoint_ide_init_hwif_ports;
#endif
}