| 0,0 → 1,348 |
|---|
| /* |
| * 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); |
| 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); |
| } |