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  1. /*
  2.  * Copyright (c) 2005 Martin Decky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #include <ofw.h>
  30. #include <ofwarch.h>
  31. #include <printf.h>
  32. #include <asm.h>
  33. #include <types.h>
  34.  
  35. uintptr_t ofw_cif;
  36.  
  37. phandle ofw_chosen;
  38. ihandle ofw_stdout;
  39. phandle ofw_root;
  40. ihandle ofw_mmu;
  41. ihandle ofw_memory_prop;
  42. phandle ofw_memory;
  43. phandle ofw_aliases;
  44.  
  45. void ofw_init(void)
  46. {
  47.     ofw_chosen = ofw_find_device("/chosen");
  48.     if (ofw_chosen == -1)
  49.         halt();
  50.    
  51.     if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout,
  52.         sizeof(ofw_stdout)) <= 0)
  53.         ofw_stdout = 0;
  54.    
  55.     ofw_root = ofw_find_device("/");
  56.     if (ofw_root == -1) {
  57.         puts("\r\nError: Unable to find / device, halted.\r\n");
  58.         halt();
  59.     }
  60.    
  61.     if (ofw_get_property(ofw_chosen, "mmu", &ofw_mmu,
  62.         sizeof(ofw_mmu)) <= 0) {
  63.         puts("\r\nError: Unable to get mmu property, halted.\r\n");
  64.         halt();
  65.     }
  66.     if (ofw_get_property(ofw_chosen, "memory", &ofw_memory_prop,
  67.         sizeof(ofw_memory_prop)) <= 0) {
  68.         puts("\r\nError: Unable to get memory property, halted.\r\n");
  69.         halt();
  70.     }
  71.  
  72.     ofw_memory = ofw_find_device("/memory");
  73.     if (ofw_memory == -1) {
  74.         puts("\r\nError: Unable to find /memory device, halted.\r\n");
  75.         halt();
  76.     }
  77.    
  78.     ofw_aliases = ofw_find_device("/aliases");
  79.     if (ofw_aliases == -1) {
  80.         puts("\r\nError: Unable to find /aliases device, halted.\r\n");
  81.         halt();
  82.     }
  83. }
  84.  
  85. /** Perform a call to OpenFirmware client interface.
  86.  *
  87.  * @param service   String identifying the service requested.
  88.  * @param nargs     Number of input arguments.
  89.  * @param nret      Number of output arguments. This includes the return
  90.  *          value.
  91.  * @param rets      Buffer for output arguments or NULL. The buffer must
  92.  *          accommodate nret - 1 items.
  93.  *
  94.  * @return      Return value returned by the client interface.
  95.  */
  96. unsigned long
  97. ofw_call(const char *service, const int nargs, const int nret, ofw_arg_t *rets,
  98.     ...)
  99. {
  100.     va_list list;
  101.     ofw_args_t args;
  102.     int i;
  103.    
  104.     args.service = (ofw_arg_t) service;
  105.     args.nargs = nargs;
  106.     args.nret = nret;
  107.    
  108.     va_start(list, rets);
  109.     for (i = 0; i < nargs; i++)
  110.         args.args[i] = va_arg(list, ofw_arg_t);
  111.     va_end(list);
  112.    
  113.     for (i = 0; i < nret; i++)
  114.         args.args[i + nargs] = 0;
  115.    
  116.     (void) ofw(&args);
  117.  
  118.     for (i = 1; i < nret; i++)
  119.         rets[i - 1] = args.args[i + nargs];
  120.  
  121.     return args.args[nargs];
  122. }
  123.  
  124. phandle ofw_find_device(const char *name)
  125. {
  126.     return ofw_call("finddevice", 1, 1, NULL, name);
  127. }
  128.  
  129. int
  130. ofw_get_property(const phandle device, const char *name, void *buf,
  131.     const int buflen)
  132. {
  133.     return ofw_call("getprop", 4, 1, NULL, device, name, buf, buflen);
  134. }
  135.  
  136. int ofw_get_proplen(const phandle device, const char *name)
  137. {
  138.     return ofw_call("getproplen", 2, 1, NULL, device, name);
  139. }
  140.  
  141. int ofw_next_property(const phandle device, char *previous, char *buf)
  142. {
  143.     return ofw_call("nextprop", 3, 1, NULL, device, previous, buf);
  144. }
  145.  
  146. int ofw_package_to_path(const phandle device, char *buf, const int buflen)
  147. {
  148.     return ofw_call("package-to-path", 3, 1, NULL, device, buf, buflen);
  149. }
  150.  
  151. unsigned int ofw_get_address_cells(const phandle device)
  152. {
  153.     unsigned int ret = 1;
  154.    
  155.     if (ofw_get_property(device, "#address-cells", &ret, sizeof(ret)) <= 0)
  156.         if (ofw_get_property(ofw_root, "#address-cells", &ret,
  157.             sizeof(ret)) <= 0)
  158.             ret = OFW_ADDRESS_CELLS;
  159.    
  160.     return ret;
  161. }
  162.  
  163.  
  164. unsigned int ofw_get_size_cells(const phandle device)
  165. {
  166.     unsigned int ret;
  167.    
  168.     if (ofw_get_property(device, "#size-cells", &ret, sizeof(ret)) <= 0)
  169.         if (ofw_get_property(ofw_root, "#size-cells", &ret,
  170.             sizeof(ret)) <= 0)
  171.             ret = OFW_SIZE_CELLS;
  172.    
  173.     return ret;
  174. }
  175.  
  176. phandle ofw_get_child_node(const phandle node)
  177. {
  178.     return ofw_call("child", 1, 1, NULL, node);
  179. }
  180.  
  181. phandle ofw_get_peer_node(const phandle node)
  182. {
  183.     return ofw_call("peer", 1, 1, NULL, node);
  184. }
  185.  
  186. static ihandle ofw_open(const char *name)
  187. {
  188.     return ofw_call("open", 1, 1, NULL, name);
  189. }
  190.  
  191.  
  192. void ofw_write(const char *str, const int len)
  193. {
  194.     if (ofw_stdout == 0)
  195.         return;
  196.    
  197.     ofw_call("write", 3, 1, NULL, ofw_stdout, str, len);
  198. }
  199.  
  200.  
  201. void *ofw_translate(const void *virt)
  202. {
  203.     ofw_arg_t result[4];
  204.     int shift;
  205.  
  206.     if (ofw_call("call-method", 4, 5, result, "translate", ofw_mmu,
  207.         virt, 0) != 0) {
  208.         puts("Error: MMU method translate() failed, halting.\n");
  209.         halt();
  210.     }
  211.  
  212.     if (ofw_translate_failed(result[0]))
  213.         return NULL;
  214.  
  215.     if (sizeof(unative_t) == 8)
  216.         shift = 32;
  217.     else
  218.         shift = 0;
  219.  
  220.     return (void *) ((result[2] << shift) | result[3]);
  221. }
  222.  
  223. void *ofw_claim_virt(const void *virt, const int len)
  224. {
  225.     ofw_arg_t retaddr;
  226.  
  227.     if (ofw_call("call-method", 5, 2, &retaddr, "claim", ofw_mmu, 0, len,
  228.         virt) != 0) {
  229.         puts("Error: MMU method claim() failed, halting.\n");
  230.         halt();
  231.     }
  232.  
  233.     return (void *) retaddr;
  234. }
  235.  
  236. void *ofw_claim_phys(const void *phys, const int len)
  237. {
  238.     ofw_arg_t retaddr[2];
  239.     int shift;
  240.  
  241.     if (sizeof(unative_t) == 8) {
  242.         shift = 32;
  243.         if (ofw_call("call-method", 6, 3, retaddr, "claim",
  244.             ofw_memory_prop, 0, len, ((uintptr_t) phys) >> shift,
  245.             ((uintptr_t) phys) & ((uint32_t) -1)) != 0) {
  246.             /*
  247.              * Note that this will help us to discover
  248.              * conflicts between OpenFirmware allocations
  249.              * and our use of physical memory.
  250.              * It is better to detect collisions here
  251.              * than to cope with weird errors later.
  252.              *
  253.              * So this is really not to make the loader
  254.              * more generic; it is here for debugging
  255.              * purposes.
  256.              */
  257.             puts("Error: memory method claim() failed, halting.\n");
  258.             halt();
  259.         }
  260.     } else {
  261.         shift = 0;
  262.         /*
  263.          * FIXME: the number of arguments is probably different...
  264.          */
  265.         puts("Error: 32-bit ofw_claim_phys not implemented.\n");
  266.         halt();
  267.     }
  268.  
  269.     return (void *) ((retaddr[0] << shift) | retaddr[1]);
  270. }
  271.  
  272. int ofw_map(const void *phys, const void *virt, const int size, const int mode)
  273. {
  274.     uintptr_t phys_hi, phys_lo;
  275.  
  276.     if (sizeof(unative_t) == 8) {
  277.         int shift = 32;
  278.         phys_hi = (uintptr_t) phys >> shift;
  279.         phys_lo = (uintptr_t) phys & 0xffffffff;
  280.     } else {
  281.         phys_hi = 0;
  282.         phys_lo = (uintptr_t) phys;
  283.     }
  284.  
  285.     return ofw_call("call-method", 7, 1, NULL, "map", ofw_mmu, mode, size,
  286.         virt, phys_hi, phys_lo);
  287. }
  288.  
  289. /** Save OpenFirmware physical memory map.
  290.  *
  291.  * @param map Memory map structure where the map will be saved.
  292.  *
  293.  * @return Zero on failure, non-zero on success.
  294.  */
  295. int ofw_memmap(memmap_t *map)
  296. {
  297.     unsigned int ac = ofw_get_address_cells(ofw_memory) /
  298.         (sizeof(uintptr_t) / sizeof(uint32_t));
  299.     unsigned int sc = ofw_get_size_cells(ofw_memory) /
  300.         (sizeof(uintptr_t) / sizeof(uint32_t));
  301.  
  302.     uintptr_t buf[((ac + sc) * MEMMAP_MAX_RECORDS)];
  303.     int ret = ofw_get_property(ofw_memory, "reg", buf, sizeof(buf));
  304.     if (ret <= 0)       /* ret is the number of written bytes */
  305.         return false;
  306.  
  307.     int pos;
  308.     map->total = 0;
  309.     map->count = 0;
  310.     for (pos = 0; (pos < ret / sizeof(uintptr_t)) &&
  311.         (map->count < MEMMAP_MAX_RECORDS); pos += ac + sc) {
  312.         void *start = (void *) (buf[pos + ac - 1]);
  313.         unsigned int size = buf[pos + ac + sc - 1];
  314.  
  315.         /*
  316.          * This is a hot fix of the issue which occurs on machines
  317.          * where there are holes in the physical memory (such as
  318.          * SunBlade 1500). Should we detect a hole in the physical
  319.          * memory, we will ignore any memory detected behind
  320.          * the hole and pretend the hole does not exist.
  321.          */
  322.         if ((map->count > 0) && (map->zones[map->count - 1].start +
  323.             map->zones[map->count - 1].size < start))
  324.             break;
  325.  
  326.         if (size > 0) {
  327.             map->zones[map->count].start = start;
  328.             map->zones[map->count].size = size;
  329.             map->count++;
  330.             map->total += size;
  331.         }
  332.     }
  333.    
  334.     return true;
  335. }
  336.  
  337. int ofw_screen(screen_t *screen)
  338. {
  339.     char device_name[BUF_SIZE];
  340.     uint32_t virtaddr;
  341.    
  342.     if (ofw_get_property(ofw_aliases, "screen", device_name,
  343.         sizeof(device_name)) <= 0)
  344.         return false;
  345.    
  346.     phandle device = ofw_find_device(device_name);
  347.     if (device == -1)
  348.         return false;
  349.    
  350.     if (ofw_get_property(device, "address", &virtaddr,
  351.         sizeof(virtaddr)) <= 0)
  352.         return false;
  353.  
  354.     screen->addr = (void *) ((uintptr_t) virtaddr);
  355.  
  356.     if (ofw_get_property(device, "width", &screen->width,
  357.         sizeof(screen->width)) <= 0)
  358.         return false;
  359.    
  360.     if (ofw_get_property(device, "height", &screen->height,
  361.         sizeof(screen->height)) <= 0)
  362.         return false;
  363.    
  364.     if (ofw_get_property(device, "depth", &screen->bpp,
  365.         sizeof(screen->bpp)) <= 0)
  366.         return false;
  367.    
  368.     if (ofw_get_property(device, "linebytes", &screen->scanline,
  369.         sizeof(screen->scanline)) <= 0)
  370.         return false;
  371.    
  372.     return true;
  373. }
  374.  
  375. /**
  376.  * Sets up the palette for the 8-bit color depth configuration so that the
  377.  * 3:2:3 color scheme can be used. Checks that setting the palette makes sense
  378.  * (appropriate nodes exist in the OBP tree and the color depth is not greater
  379.  * than 8).
  380.  *
  381.  * @return  true if the palette has been set, false otherwise
  382.  */
  383. int setup_palette(void)
  384. {
  385.     char device_name[BUF_SIZE];
  386.    
  387.     /* resolve alias */
  388.     if (ofw_get_property(ofw_aliases, "screen", device_name,
  389.         sizeof(device_name)) <= 0)
  390.         return false;
  391.  
  392.     /* for depth greater than 8 it makes no sense to set up the palette */
  393.     uint32_t depth;
  394.     phandle device = ofw_find_device(device_name);
  395.     if (device == -1)
  396.         return false;
  397.     if (ofw_get_property(device, "depth", &depth, sizeof(uint32_t)) <= 0)
  398.         return false;
  399.     if (depth != 8)
  400.         return false;
  401.    
  402.     /* required in order to be able to make a method call */
  403.     ihandle screen = ofw_open(device_name);
  404.     if (screen == -1)
  405.         return false;
  406.  
  407.     /* setup the palette so that the (inverted) 3:2:3 scheme is usable */
  408.     unsigned int i;
  409.     for (i = 0; i < 256; i++)
  410.         if (ofw_call("call-method", 6, 1, NULL, "color!", screen,
  411.             255 - i,
  412.             i << 5,
  413.             (i >> 3) << 6,
  414.             (i >> 5) << 5) != 0);
  415.     return true;
  416. }
  417.  
  418. void ofw_quiesce(void)
  419. {
  420.     ofw_call("quiesce", 0, 0, NULL);
  421. }
  422.