/* * Copyright (C) 2014-2018 MIPS Tech, LLC * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. 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. * 3. Neither the name of the copyright holder nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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 <_ansi.h> #include #include #if _MIPS_SIM == _ABI64 # define K0BASE 0xFFFFFFFF80000000LL #else # define K0BASE 0x80000000 #endif void _get_ram_range (void **ram_base, void **ram_extent) { struct s_mem { unsigned int size; unsigned int icsize; unsigned int dcsize; } mem; void get_mem_info (struct s_mem*); /* The sizeof (s_mem.size) must be 4 bytes. The compiler should be able to eliminate this check */ if (sizeof (unsigned int) != 4) { *ram_extent = 0; return; } get_mem_info (&mem); /* NOTE: The value returned from the get_mem_info call is the amount of memory, and not the address of the (last byte + 1) */ if (ram_base) *ram_base = (void*)K0BASE; *ram_extent = (void*)(uintptr_t)(K0BASE + mem.size); }