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/*
* 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;
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();
}
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(const void *virt, const int len)
{
ofw_arg_t retaddr;
int shift;
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;
}
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);
}
int ofw_memmap(memmap_t *map)
{
unsigned int ac = ofw_get_address_cells(ofw_memory);
unsigned int sc = ofw_get_size_cells(ofw_memory);
uint32_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(uint32_t)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) {
void * start = (void *) ((uintptr_t) buf[pos + ac - 1]);
unsigned int size = buf[pos + ac + sc - 1];
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;
}