26,222 → 26,10 |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
*/ |
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#include "ofw.h" |
#include "asm.h" |
#include "printf.h" |
#include <ofw.h> |
#include <printf.h> |
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#define MAX_OFW_ARGS 10 |
#define BUF_SIZE 1024 |
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typedef unsigned int ofw_arg_t; |
typedef unsigned int ihandle; |
typedef unsigned int phandle; |
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/** OpenFirmware command structure |
* |
*/ |
typedef struct { |
const char *service; /**< Command name */ |
unsigned int nargs; /**< Number of in arguments */ |
unsigned int nret; /**< Number of out arguments */ |
ofw_arg_t args[MAX_OFW_ARGS]; /**< List of arguments */ |
} ofw_args_t; |
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typedef void (*ofw_entry)(ofw_args_t *); |
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ofw_entry ofw; |
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phandle ofw_chosen; |
ihandle ofw_stdout; |
phandle ofw_root; |
ihandle ofw_mmu; |
phandle ofw_memory; |
phandle ofw_aliases; |
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static int ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets, ...) |
void write(const char *str, const long len) |
{ |
va_list list; |
ofw_args_t args; |
int i; |
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args.service = service; |
args.nargs = nargs; |
args.nret = nret; |
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va_start(list, rets); |
for (i = 0; i < nargs; i++) |
args.args[i] = va_arg(list, ofw_arg_t); |
va_end(list); |
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for (i = 0; i < nret; i++) |
args.args[i + nargs] = 0; |
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ofw(&args); |
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for (i = 1; i < nret; i++) |
rets[i - 1] = args.args[i + nargs]; |
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return args.args[nargs]; |
ofw_write(str, len); |
} |
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static phandle ofw_find_device(const char *name) |
{ |
return ofw_call("finddevice", 1, 1, NULL, name); |
} |
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static int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen) |
{ |
return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen); |
} |
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static unsigned int ofw_get_address_cells(const phandle device) |
{ |
unsigned int ret; |
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if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0) |
if (ofw_get_property(ofw_root, "#address-cells", &ret, sizeof(ret)) <= 0) |
ret = 1; |
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return ret; |
} |
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static unsigned int ofw_get_size_cells(const phandle device) |
{ |
unsigned int ret; |
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if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0) |
if (ofw_get_property(ofw_root, "#size-cells", &ret, sizeof(ret)) <= 0) |
ret = 1; |
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return ret; |
} |
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static ihandle ofw_open(const char *name) |
{ |
return ofw_call("open", 1, 1, NULL, name); |
} |
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void init(void) |
{ |
ofw_chosen = ofw_find_device("/chosen"); |
if (ofw_chosen == -1) |
halt(); |
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if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0) |
ofw_stdout = 0; |
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ofw_root = ofw_find_device("/"); |
if (ofw_root == -1) { |
puts("\r\nError: Unable to find / device, halted.\r\n"); |
halt(); |
} |
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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(); |
} |
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ofw_memory = ofw_find_device("/memory"); |
if (ofw_memory == -1) { |
puts("\r\nError: Unable to find /memory device, halted.\r\n"); |
halt(); |
} |
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ofw_aliases = ofw_find_device("/aliases"); |
if (ofw_aliases == -1) { |
puts("\r\nError: Unable to find /aliases device, halted.\r\n"); |
halt(); |
} |
} |
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void ofw_write(const char *str, const long len) |
{ |
if (ofw_stdout == 0) |
return; |
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ofw_call("write", 3, 1, NULL, ofw_stdout, str, len); |
} |
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void *ofw_translate(const void *virt) |
{ |
ofw_arg_t result[3]; |
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if (ofw_call("call-method", 4, 4, result, "translate", ofw_mmu, (unsigned long) virt, 1) != 0) { |
puts("Error: MMU method translate() failed, halting.\n"); |
halt(); |
} |
return (void *) (unsigned long) result[2]; |
} |
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int ofw_map(const void *phys, const void *virt, const long size, const int mode) |
{ |
return ofw_call("call-method", 6, 1, NULL, "map", ofw_mmu, mode, size, virt, phys); |
} |
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int ofw_memmap(memmap_t *map) |
{ |
unsigned int buf[BUF_SIZE]; |
int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(unsigned int) * BUF_SIZE); |
if (ret <= 0) |
return false; |
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unsigned int ac = ofw_get_address_cells(ofw_memory); |
unsigned int sc = ofw_get_size_cells(ofw_memory); |
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int pos; |
map->total = 0; |
map->count = 0; |
for (pos = 0; (pos < ret / sizeof(unsigned int)) && (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) { |
void * start = (void *) (unsigned long) buf[pos + ac - 1]; |
unsigned int size = buf[pos + ac + sc - 1]; |
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if (size > 0) { |
map->zones[map->count].start = start; |
map->zones[map->count].size = size; |
map->count++; |
map->total += size; |
} |
} |
} |
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int ofw_screen(screen_t *screen) |
{ |
char device_name[BUF_SIZE]; |
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if (ofw_get_property(ofw_aliases, "screen", device_name, sizeof(char) * BUF_SIZE) <= 0) |
return false; |
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phandle device = ofw_find_device(device_name); |
if (device == -1) |
return false; |
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if (ofw_get_property(device, "address", &screen->addr, sizeof(screen->addr)) <= 0) |
return false; |
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if (ofw_get_property(device, "width", &screen->width, sizeof(screen->width)) <= 0) |
return false; |
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if (ofw_get_property(device, "height", &screen->height, sizeof(screen->height)) <= 0) |
return false; |
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if (ofw_get_property(device, "depth", &screen->bpp, sizeof(screen->bpp)) <= 0) |
return false; |
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if (ofw_get_property(device, "linebytes", &screen->scanline, sizeof(screen->scanline)) <= 0) |
return false; |
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return true; |
} |