1 /* $OpenBSD: loongson3_machdep.c,v 1.1 2015/08/15 22:31:38 miod Exp $ */ 2 3 /* 4 * Copyright (c) 2009, 2010, 2014 Miodrag Vallat. 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/kernel.h> 22 #include <sys/proc.h> 23 #include <sys/sysctl.h> 24 25 #include <uvm/uvm_extern.h> 26 27 #include <machine/autoconf.h> 28 #include <machine/cpu.h> 29 #include <machine/memconf.h> 30 #include <machine/pmon.h> 31 32 #ifdef HIBERNATE 33 #include <machine/hibernate_var.h> 34 #endif /* HIBERNATE */ 35 36 extern struct phys_mem_desc mem_layout[MAXMEMSEGS]; 37 38 void loongson3a_setup(u_long, u_long); 39 40 #if 0 41 /* PCI view of CPU memory */ 42 paddr_t loongson_dma_base = 0; 43 #endif 44 45 #define MEMLO_BASE 0x00000000UL 46 #define MEMHI_BASE 0x90000000UL /* 2G + 256MB */ 47 48 /* 49 * Setup memory mappings for Loongson 3A processors. 50 */ 51 52 void 53 loongson3a_setup(u_long memlo, u_long memhi) 54 { 55 physmem = memlo + memhi + 16; /* in MB so far */ 56 57 memlo = atop(memlo << 20); 58 memhi = atop(memhi << 20); 59 physmem = memlo + memhi + atop(16 << 20); 60 61 /* do NOT stomp on exception area */ 62 mem_layout[0].mem_first_page = atop(MEMLO_BASE) + 1; 63 mem_layout[0].mem_last_page = atop(MEMLO_BASE) + memlo; 64 #ifdef HIBERNATE 65 mem_layout[0].mem_first_page += HIBERNATE_RESERVED_PAGES; 66 #endif 67 68 if (memhi != 0) { 69 #ifdef notyet 70 mem_layout[1].mem_first_page = atop(MEMHI_BASE); 71 mem_layout[1].mem_last_page = atop(MEMHI_BASE) + 72 memhi; 73 #endif 74 } 75 } 76