static void ofw_real_bounce_alloc(void *junk) { /* * Check that ofw_real is actually in use before allocating wads * of memory. Do this by checking if our mutex has been set up. */ if (!mtx_initialized(&of_bounce_mtx)) return; /* * Allocate a page of contiguous, wired physical memory that can * fit into a 32-bit address space and accessed from real mode. */ mtx_lock(&of_bounce_mtx); of_bounce_virt = contigmalloc(4 * PAGE_SIZE, M_OFWREAL, 0, 0, ulmin(platform_real_maxaddr(), BUS_SPACE_MAXADDR_32BIT), PAGE_SIZE, 4 * PAGE_SIZE); of_bounce_phys = vtophys(of_bounce_virt); of_bounce_size = 4 * PAGE_SIZE; /* * For virtual-mode OF, direct map this physical address so that * we have a 32-bit virtual address to give OF. */ if (!ofw_real_mode && !hw_direct_map) pmap_kenter(of_bounce_phys, of_bounce_phys); mtx_unlock(&of_bounce_mtx); }
static void rtas_setup(void *junk) { ihandle_t rtasi; cell_t rtas_size = 0, rtas_ptr; char path[31]; int result; rtas = OF_finddevice("/rtas"); if (rtas == -1) { rtas = 0; return; } OF_package_to_path(rtas, path, sizeof(path)); rtasi = OF_open(path); if (rtasi == 0) { rtas = 0; printf("Error initializing RTAS: could not open node\n"); return; } mtx_init(&rtas_mtx, "RTAS", MTX_DEF, 0); /* RTAS must be called with everything turned off in MSR */ rtasmsr = mfmsr(); rtasmsr &= ~(PSL_IR | PSL_DR | PSL_EE | PSL_SE); #ifdef __powerpc64__ rtasmsr &= ~PSL_SF; #endif /* * Allocate rtas_size + one page of contiguous, wired physical memory * that can fit into a 32-bit address space and accessed from real mode. * This is used both to bounce arguments and for RTAS private data. * * It must be 4KB-aligned and not cross a 256 MB boundary. */ OF_getprop(rtas, "rtas-size", &rtas_size, sizeof(rtas_size)); rtas_size = round_page(rtas_size); rtas_bounce_virt = contigmalloc(rtas_size + PAGE_SIZE, M_RTAS, 0, 0, ulmin(platform_real_maxaddr(), BUS_SPACE_MAXADDR_32BIT), 4096, 256*1024*1024); rtas_private_data = vtophys(rtas_bounce_virt); rtas_bounce_virt += rtas_size; /* Actual bounce area */ rtas_bounce_phys = vtophys(rtas_bounce_virt); rtas_bounce_size = PAGE_SIZE; /* * Instantiate RTAS. We always use the 32-bit version. */ result = OF_call_method("instantiate-rtas", rtasi, 1, 1, (cell_t)rtas_private_data, &rtas_ptr); OF_close(rtasi); if (result != 0) { rtas = 0; rtas_ptr = 0; printf("Error initializing RTAS (%d)\n", result); return; } rtas_entry = (uintptr_t)(rtas_ptr); }