0,0 → 1,308 |
/* |
* 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); |
} |
|
/** 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); |
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; |
} |
|
|
void ofw_quiesce(void) |
{ |
ofw_call("quiesce", 0, 0, NULL); |
} |