Subversion Repositories HelenOS

Rev

Rev 3672 | Rev 3692 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

/*
 * Copyright (c) 2005 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <ofw.h>
#include <ofwarch.h>
#include <printf.h>
#include <asm.h>
#include <types.h>

uintptr_t ofw_cif;

phandle ofw_chosen;
ihandle ofw_stdout;
phandle ofw_root;
ihandle ofw_mmu;
ihandle ofw_memory_prop;
phandle ofw_memory;
phandle ofw_aliases;

void ofw_init(void)
{
    ofw_chosen = ofw_find_device("/chosen");
    if (ofw_chosen == -1)
        halt();
    
    if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout,
        sizeof(ofw_stdout)) <= 0)
        ofw_stdout = 0;
    
    ofw_root = ofw_find_device("/");
    if (ofw_root == -1) {
        puts("\r\nError: Unable to find / device, halted.\r\n");
        halt();
    }
    
    if (ofw_get_property(ofw_chosen, "mmu", &ofw_mmu,
        sizeof(ofw_mmu)) <= 0) {
        puts("\r\nError: Unable to get mmu property, halted.\r\n");
        halt();
    }
    if (ofw_get_property(ofw_chosen, "memory", &ofw_memory_prop,
        sizeof(ofw_memory_prop)) <= 0) {
        puts("\r\nError: Unable to get memory property, halted.\r\n");
        halt();
    }

    ofw_memory = ofw_find_device("/memory");
    if (ofw_memory == -1) {
        puts("\r\nError: Unable to find /memory device, halted.\r\n");
        halt();
    }
    
    ofw_aliases = ofw_find_device("/aliases");
    if (ofw_aliases == -1) {
        puts("\r\nError: Unable to find /aliases device, halted.\r\n");
        halt();
    }
}

/** Perform a call to OpenFirmware client interface.
 *
 * @param service   String identifying the service requested.
 * @param nargs     Number of input arguments.
 * @param nret      Number of output arguments. This includes the return
 *          value.
 * @param rets      Buffer for output arguments or NULL. The buffer must
 *          accommodate nret - 1 items.
 *
 * @return      Return value returned by the client interface.
 */
unsigned long
ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets,
    ...)
{
    va_list list;
    ofw_args_t args;
    int i;
    
    args.service = (ofw_arg_t) service;
    args.nargs = nargs;
    args.nret = nret;
    
    va_start(list, rets);
    for (i = 0; i < nargs; i++)
        args.args[i] = va_arg(list, ofw_arg_t);
    va_end(list);
    
    for (i = 0; i < nret; i++)
        args.args[i + nargs] = 0;
    
    (void) ofw(&args);

    for (i = 1; i < nret; i++)
        rets[i - 1] = args.args[i + nargs];

    return args.args[nargs];
}

phandle ofw_find_device(const char *name)
{
    return ofw_call("finddevice", 1, 1, NULL, name);
}

int
ofw_get_property(const phandle device, const char *name, void *buf,
    const int buflen)
{
    return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen);
}

int ofw_get_proplen(const phandle device, const char *name)
{
    return ofw_call("getproplen", 2, 1, NULL, device, name);
}

int ofw_next_property(const phandle device, char *previous, char *buf)
{
    return ofw_call("nextprop", 3, 1, NULL, device, previous, buf);
}

int ofw_package_to_path(const phandle device, char *buf, const int buflen)
{
    return ofw_call("package-to-path", 3, 1, NULL, device, buf, buflen);
}

unsigned int ofw_get_address_cells(const phandle device)
{
    unsigned int ret = 1;
    
    if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0)
        if (ofw_get_property(ofw_root, "#address-cells", &ret,
            sizeof(ret)) <= 0)
            ret = OFW_ADDRESS_CELLS;
    
    return ret;
}


unsigned int ofw_get_size_cells(const phandle device)
{
    unsigned int ret;
    
    if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0)
        if (ofw_get_property(ofw_root, "#size-cells", &ret,
            sizeof(ret)) <= 0)
            ret = OFW_SIZE_CELLS;
    
    return ret;
}

phandle ofw_get_child_node(const phandle node)
{
    return ofw_call("child", 1, 1, NULL, node);
}

phandle ofw_get_peer_node(const phandle node)
{
    return ofw_call("peer", 1, 1, NULL, node);
}

static ihandle ofw_open(const char *name)
{
    return ofw_call("open", 1, 1, NULL, name);
}


void ofw_write(const char *str, const int len)
{
    if (ofw_stdout == 0)
        return;
    
    ofw_call("write", 3, 1, NULL, ofw_stdout, str, len);
}


void *ofw_translate(const void *virt)
{
    ofw_arg_t result[4];
    int shift;

    if (ofw_call("call-method", 3, 5, result, "translate", ofw_mmu,
        virt) != 0) {
        puts("Error: MMU method translate() failed, halting.\n");
        halt();
    }

    if (ofw_translate_failed(result[0]))
        return NULL;

    if (sizeof(unative_t) == 8)
        shift = 32;
    else
        shift = 0;

    return (void *) ((result[2] << shift) | result[3]);
}

void *ofw_claim_virt(const void *virt, const int len)
{
    ofw_arg_t retaddr;

    if (ofw_call("call-method", 5, 2, &retaddr, "claim", ofw_mmu, 0, len,
        virt) != 0) {
        puts("Error: MMU method claim() failed, halting.\n");
        halt();
    }

    return (void *) retaddr;
}

void *ofw_claim_phys(const void *phys, const int len)
{
    ofw_arg_t retaddr[2];
    int shift;

    if (sizeof(unative_t) == 8) {
        shift = 32;
        if (ofw_call("call-method", 6, 3, retaddr, "claim",
            ofw_memory_prop, 0, len, ((uintptr_t) phys) >> shift,
            ((uintptr_t) phys) & ((uint32_t) -1)) != 0) {
            /*
             * Note that this will help us to discover
             * conflicts between OpenFirmware allocations
             * and our use of physical memory.
             * It is better to detect collisions here
             * than to cope with weird errors later.
             *
             * So this is really not to make the loader
             * more generic; it is here for debugging
             * purposes.
             */
            puts("Error: memory method claim() failed, halting.\n");
            halt();
        }
    } else {
        shift = 0;
        /*
         * FIXME: the number of arguments is probably different...
         */
        puts("Error: 32-bit ofw_claim_phys not implemented.\n");
        halt();
    }

    return (void *) ((retaddr[0] << shift) | retaddr[1]);
}

int ofw_map(const void *phys, const void *virt, const int size, const int mode)
{
    uintptr_t phys_hi, phys_lo;

    if (sizeof(unative_t) == 8) {
        int shift = 32;
        phys_hi = (uintptr_t) phys >> shift;
        phys_lo = (uintptr_t) phys & 0xffffffff;
    } else {
        phys_hi = 0;
        phys_lo = (uintptr_t) phys;
    }

    return ofw_call("call-method", 7, 1, NULL, "map", ofw_mmu, mode, size,
        virt, phys_hi, phys_lo);
}

/** Save OpenFirmware physical memory map.
 *
 * @param map Memory map structure where the map will be saved.
 *
 * @return Zero on failure, non-zero on success.
 */
int ofw_memmap(memmap_t *map)
{
    unsigned int ac = ofw_get_address_cells(ofw_memory) /
        (sizeof(uintptr_t) / sizeof(uint32_t));
    unsigned int sc = ofw_get_size_cells(ofw_memory) /
        (sizeof(uintptr_t) / sizeof(uint32_t));
    printf("address cells: %d, size cells: %d. ", ac, sc);

    uintptr_t buf[((ac + sc) * MEMMAP_MAX_RECORDS)];
    int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(buf));
    if (ret <= 0)       /* ret is the number of written bytes */
        return false;

    int pos;
    map->total = 0;
    map->count = 0;
    for (pos = 0; (pos < ret / sizeof(uintptr_t)) &&
        (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) {
        void *start = (void *) (buf[pos + ac - 1]);
        unsigned int size = buf[pos + ac + sc - 1];

        /*
         * This is a hot fix of the issue which occurs on machines
         * where there are holes in the physical memory (such as
         * SunBlade 1500). Should we detect a hole in the physical
         * memory, we will ignore any memory detected behind
         * the hole and pretend the hole does not exist.
         */
        if ((map->count > 0) && (map->zones[map->count - 1].start +
            map->zones[map->count - 1].size < start))
            break;

        if (size > 0) {
            map->zones[map->count].start = start;
            map->zones[map->count].size = size;
            map->count++;
            map->total += size;
        }
    }
    
    return true;
}

int ofw_screen(screen_t *screen)
{
    char device_name[BUF_SIZE];
    uint32_t virtaddr;
    
    if (ofw_get_property(ofw_aliases, "screen", device_name,
        sizeof(device_name)) <= 0)
        return false;
    
    phandle device = ofw_find_device(device_name);
    if (device == -1)
        return false;
    
    if (ofw_get_property(device, "address", &virtaddr,
        sizeof(virtaddr)) <= 0)
        return false;

    screen->addr = (void *) ((uintptr_t) virtaddr);

    if (ofw_get_property(device, "width", &screen->width,
        sizeof(screen->width)) <= 0)
        return false;
    
    if (ofw_get_property(device, "height", &screen->height,
        sizeof(screen->height)) <= 0)
        return false;
    
    if (ofw_get_property(device, "depth", &screen->bpp,
        sizeof(screen->bpp)) <= 0)
        return false;
    
    if (ofw_get_property(device, "linebytes", &screen->scanline,
        sizeof(screen->scanline)) <= 0)
        return false;
    
    return true;
}

/**
 * Sets up the palette for the 8-bit color depth configuration so that the
 * 3:2:3 color scheme can be used. Checks that setting the palette makes sense
 * (appropriate nodes exist in the OBP tree and the color depth is not greater
 * than 8). 
 *
 * @return  true if the palette has been set, false otherwise
 */
int setup_palette(void)
{
    char device_name[BUF_SIZE];
    
    /* resolve alias */
    if (ofw_get_property(ofw_aliases, "screen", device_name,
        sizeof(device_name)) <= 0)
        return false;

    /* for depth greater than 8 it makes no sense to set up the palette */
    uint32_t depth;
    phandle device = ofw_find_device(device_name);
    if (device == -1)
        return false;
    if (ofw_get_property(device, "depth", &depth, sizeof(uint32_t)) <= 0)
        return false;
    if (depth != 8)
        return false;
    
    /* required in order to be able to make a method call */
    ihandle screen = ofw_open(device_name);
    if (screen == -1)
        return false;

    /* setup the palette so that the 3:2:3 scheme is usable */
    unsigned int i;
    for (i = 0; i < 256; i++)
        if (ofw_call("call-method", 6, 1, NULL, "color!", screen,
            i,
            i << 5,
            (i >> 3) << 6,
            (i >> 5) << 5) != 0); 
    return true;
}

void ofw_quiesce(void)
{
    ofw_call("quiesce", 0, 0, NULL);
}