s5_machdep.c revision 183372
1/*- 2 * Copyright (c) 2007 Bruce M. Simpson. 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 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/mips/sentry5/s5_machdep.c 183372 2008-09-26 04:45:56Z imp $"); 29 30#include <sys/param.h> 31#include <machine/cpuregs.h> 32 33#include <mips/sentry5/s5reg.h> 34 35#include "opt_ddb.h" 36 37#include <sys/param.h> 38#include <sys/conf.h> 39#include <sys/kernel.h> 40#include <sys/systm.h> 41#include <sys/imgact.h> 42#include <sys/bio.h> 43#include <sys/buf.h> 44#include <sys/bus.h> 45#include <sys/cpu.h> 46#include <sys/cons.h> 47#include <sys/exec.h> 48#include <sys/ucontext.h> 49#include <sys/proc.h> 50#include <sys/kdb.h> 51#include <sys/ptrace.h> 52#include <sys/reboot.h> 53#include <sys/signalvar.h> 54#include <sys/sysent.h> 55#include <sys/sysproto.h> 56#include <sys/user.h> 57 58#include <vm/vm.h> 59#include <vm/vm_object.h> 60#include <vm/vm_page.h> 61#include <vm/vm_pager.h> 62 63#include <machine/cache.h> 64#include <machine/clock.h> 65#include <machine/cpu.h> 66#include <machine/cpuinfo.h> 67#include <machine/cpufunc.h> 68#include <machine/cpuregs.h> 69#include <machine/hwfunc.h> 70#include <machine/intr_machdep.h> 71#include <machine/locore.h> 72#include <machine/md_var.h> 73#include <machine/pte.h> 74#include <machine/sigframe.h> 75#include <machine/trap.h> 76#include <machine/vmparam.h> 77 78#ifdef CFE 79#include <dev/cfe/cfe_api.h> 80#endif 81 82#ifdef CFE 83extern uint32_t cfe_handle; 84extern uint32_t cfe_vector; 85#endif 86 87extern int *edata; 88extern int *end; 89 90static void 91mips_init(void) 92{ 93 int i; 94 95 printf("entry: mips_init()\n"); 96 97#ifdef CFE 98 /* 99 * Query DRAM memory map from CFE. 100 */ 101 physmem = 0; 102 for (i = 0; i < 10; i += 2) { 103 int result; 104 uint64_t addr, len, type; 105 106 result = cfe_enummem(i, 0, &addr, &len, &type); 107 if (result < 0) { 108 phys_avail[i] = phys_avail[i + 1] = 0; 109 break; 110 } 111 if (type != CFE_MI_AVAILABLE) 112 continue; 113 114 phys_avail[i] = addr; 115 if (i == 0 && addr == 0) { 116 /* 117 * If this is the first physical memory segment probed 118 * from CFE, omit the region at the start of physical 119 * memory where the kernel has been loaded. 120 */ 121 phys_avail[i] += MIPS_KSEG0_TO_PHYS((vm_offset_t)&end); 122 } 123 phys_avail[i + 1] = addr + len; 124 physmem += len; 125 } 126 127 realmem = btoc(physmem); 128#endif 129 130 physmem = realmem; 131 132 init_param1(); 133 init_param2(physmem); 134 mips_cpu_init(); 135 pmap_bootstrap(); 136 mips_proc0_init(); 137 mutex_init(); 138#ifdef DDB 139 kdb_init(); 140#endif 141} 142 143void 144platform_halt(void) 145{ 146 147} 148 149 150void 151platform_identify(void) 152{ 153 154} 155 156void 157platform_reset(void) 158{ 159 160#if defined(CFE) 161 cfe_exit(0, 0); 162#else 163 *((volatile uint8_t *)MIPS_PHYS_TO_KSEG1(SENTRY5_EXTIFADR)) = 0x80; 164#endif 165} 166 167void 168platform_trap_enter(void) 169{ 170 171} 172 173void 174platform_trap_exit(void) 175{ 176 177} 178 179void 180platform_start(__register_t a0 __unused, __register_t a1 __unused, 181 __register_t a2 __unused, __register_t a3 __unused) 182{ 183 vm_offset_t kernend; 184 uint64_t platform_counter_freq; 185 186 /* clear the BSS and SBSS segments */ 187 kernend = round_page((vm_offset_t)&end); 188 memset(&edata, 0, kernend - (vm_offset_t)(&edata)); 189 190#ifdef CFE 191 /* 192 * Initialize CFE firmware trampolines before 193 * we initialize the low-level console. 194 */ 195 if (cfe_handle != 0) 196 cfe_init(cfe_handle, cfe_vector); 197#endif 198 cninit(); 199 200#ifdef CFE 201 if (cfe_handle == 0) 202 panic("CFE was not detected by locore.\n"); 203#endif 204 mips_init(); 205 206# if 0 207 /* 208 * Probe the Broadcom Sentry5's on-chip PLL clock registers 209 * and discover the CPU pipeline clock and bus clock 210 * multipliers from this. 211 * XXX: Wrong place. You have to ask the ChipCommon 212 * or External Interface cores on the SiBa. 213 */ 214 uint32_t busmult, cpumult, refclock, clkcfg1; 215#define S5_CLKCFG1_REFCLOCK_MASK 0x0000001F 216#define S5_CLKCFG1_BUSMULT_MASK 0x000003E0 217#define S5_CLKCFG1_BUSMULT_SHIFT 5 218#define S5_CLKCFG1_CPUMULT_MASK 0xFFFFFC00 219#define S5_CLKCFG1_CPUMULT_SHIFT 10 220 221 counter_freq = 100000000; /* XXX */ 222 223 clkcfg1 = s5_rd_clkcfg1(); 224 printf("clkcfg1 = 0x%08x\n", clkcfg1); 225 226 refclock = clkcfg1 & 0x1F; 227 busmult = ((clkcfg1 & 0x000003E0) >> 5) + 1; 228 cpumult = ((clkcfg1 & 0xFFFFFC00) >> 10) + 1; 229 230 printf("refclock = %u\n", refclock); 231 printf("busmult = %u\n", busmult); 232 printf("cpumult = %u\n", cpumult); 233 234 counter_freq = cpumult * refclock; 235# else 236 platform_counter_freq = 200 * 1000 * 1000; /* Sentry5 is 200MHz */ 237# endif 238 239 mips_timer_init_params(platform_counter_freq, 0); 240} 241