1 /* $OpenBSD: cpu.h,v 1.26 2013/06/11 16:42:10 deraadt Exp $ */ 2 /* $NetBSD: cpu.h,v 1.41 2006/01/21 04:24:12 uwe Exp $ */ 3 4 /*- 5 * Copyright (c) 2002 The NetBSD Foundation, Inc. All rights reserved. 6 * Copyright (c) 1990 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * William Jolitz. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)cpu.h 5.4 (Berkeley) 5/9/91 37 */ 38 39 /* 40 * SH3/SH4 support. 41 * 42 * T.Horiuchi Brains Corp. 5/22/98 43 */ 44 45 #ifndef _SH_CPU_H_ 46 #define _SH_CPU_H_ 47 48 #include <sh/psl.h> 49 #include <sh/frame.h> 50 51 #ifdef _KERNEL 52 53 /* 54 * Per-CPU information. 55 */ 56 57 #include <machine/intr.h> 58 #include <sys/sched.h> 59 60 struct cpu_info { 61 struct proc *ci_curproc; 62 63 struct schedstate_percpu ci_schedstate; /* scheduler state */ 64 u_int32_t ci_randseed; 65 #ifdef DIAGNOSTIC 66 int ci_mutex_level; 67 #endif 68 #ifdef GPROF 69 struct gmonparam *ci_gmon; 70 #endif 71 }; 72 73 extern struct cpu_info cpu_info_store; 74 #define curcpu() (&cpu_info_store) 75 #define cpu_number() 0 76 #define CPU_IS_PRIMARY(ci) 1 77 #define CPU_INFO_ITERATOR int 78 #define CPU_INFO_FOREACH(cii, ci) \ 79 for (cii = 0, ci = curcpu(); ci != NULL; ci = NULL) 80 #define CPU_INFO_UNIT(ci) 0 81 #define MAXCPUS 1 82 #define cpu_unidle(ci) 83 84 85 /* 86 * Arguments to hardclock and gatherstats encapsulate the previous 87 * machine state in an opaque clockframe. 88 */ 89 struct clockframe { 90 int spc; /* program counter at time of interrupt */ 91 int ssr; /* status register at time of interrupt */ 92 int ssp; /* stack pointer at time of interrupt */ 93 }; 94 95 #define CLKF_USERMODE(cf) (!KERNELMODE((cf)->ssr)) 96 #define CLKF_PC(cf) ((cf)->spc) 97 #define CLKF_INTR(cf) 0 /* XXX */ 98 99 /* 100 * This is used during profiling to integrate system time. It can safely 101 * assume that the process is resident. 102 */ 103 #define PROC_PC(p) ((p)->p_md.md_regs->tf_spc) 104 #define PROC_STACK(p) ((p)->p_md.md_regs->tf_r15) 105 106 /* 107 * Preempt the current process if in interrupt from user mode, 108 * or after the current trap/syscall if in system mode. 109 */ 110 #define need_resched(ci) \ 111 do { \ 112 want_resched = 1; \ 113 if (curproc != NULL) \ 114 aston(curproc); \ 115 } while (/*CONSTCOND*/0) 116 #define clear_resched(ci) want_resched = 0 117 118 /* 119 * Give a profiling tick to the current process when the user profiling 120 * buffer pages are invalid. On the MIPS, request an ast to send us 121 * through trap, marking the proc as needing a profiling tick. 122 */ 123 #define need_proftick(p) aston(p) 124 125 /* 126 * Notify the current process (p) that it has a signal pending, 127 * process as soon as possible. 128 */ 129 #define signotify(p) aston(p) 130 131 #define aston(p) ((p)->p_md.md_astpending = 1) 132 133 extern int want_resched; /* need_resched() was called */ 134 135 /* 136 * We need a machine-independent name for this. 137 */ 138 #define DELAY(x) delay(x) 139 140 #define cpu_idle_enter() do { /* nothing */ } while (0) 141 #define cpu_idle_cycle() __asm volatile("sleep") 142 #define cpu_idle_leave() do { /* nothing */ } while (0) 143 144 #endif /* _KERNEL */ 145 146 /* 147 * Logical address space of SH3/SH4 CPU. 148 */ 149 #define SH3_PHYS_MASK 0x1fffffff 150 151 #define SH3_P0SEG_BASE 0x00000000 /* TLB mapped, also U0SEG */ 152 #define SH3_P0SEG_END 0x7fffffff 153 #define SH3_P1SEG_BASE 0x80000000 /* pa == va */ 154 #define SH3_P1SEG_END 0x9fffffff 155 #define SH3_P2SEG_BASE 0xa0000000 /* pa == va, non-cacheable */ 156 #define SH3_P2SEG_END 0xbfffffff 157 #define SH3_P3SEG_BASE 0xc0000000 /* TLB mapped, kernel mode */ 158 #define SH3_P3SEG_END 0xdfffffff 159 #define SH3_P4SEG_BASE 0xe0000000 /* peripheral space */ 160 #define SH3_P4SEG_END 0xffffffff 161 162 #define SH3_P1SEG_TO_PHYS(x) ((uint32_t)(x) & SH3_PHYS_MASK) 163 #define SH3_P2SEG_TO_PHYS(x) ((uint32_t)(x) & SH3_PHYS_MASK) 164 #define SH3_PHYS_TO_P1SEG(x) ((uint32_t)(x) | SH3_P1SEG_BASE) 165 #define SH3_PHYS_TO_P2SEG(x) ((uint32_t)(x) | SH3_P2SEG_BASE) 166 #define SH3_P1SEG_TO_P2SEG(x) ((uint32_t)(x) | 0x20000000) 167 #define SH3_P2SEG_TO_P1SEG(x) ((uint32_t)(x) & ~0x20000000) 168 169 #ifdef _KERNEL 170 #ifndef __lint__ 171 172 /* 173 * Switch from P1 (cached) to P2 (uncached). This used to be written 174 * using gcc's assigned goto extension, but gcc4 aggressive optimizations 175 * tend to optimize that away under certain circumstances. 176 */ 177 #define RUN_P2 \ 178 do { \ 179 register uint32_t r0 asm("r0"); \ 180 uint32_t pc; \ 181 __asm volatile( \ 182 " mov.l 1f, %1 ;" \ 183 " mova 2f, %0 ;" \ 184 " or %0, %1 ;" \ 185 " jmp @%1 ;" \ 186 " nop ;" \ 187 " .align 2 ;" \ 188 "1: .long 0x20000000;" \ 189 "2:;" \ 190 : "=r"(r0), "=r"(pc)); \ 191 } while (0) 192 193 /* 194 * Switch from P2 (uncached) back to P1 (cached). We need to be 195 * running on P2 to access cache control, memory-mapped cache and TLB 196 * arrays, etc. and after touching them at least 8 instructinos are 197 * necessary before jumping to P1, so provide that padding here. 198 */ 199 #define RUN_P1 \ 200 do { \ 201 register uint32_t r0 asm("r0"); \ 202 uint32_t pc; \ 203 __asm volatile( \ 204 /*1*/ " mov.l 1f, %1 ;" \ 205 /*2*/ " mova 2f, %0 ;" \ 206 /*3*/ " nop ;" \ 207 /*4*/ " and %0, %1 ;" \ 208 /*5*/ " nop ;" \ 209 /*6*/ " nop ;" \ 210 /*7*/ " nop ;" \ 211 /*8*/ " nop ;" \ 212 " jmp @%1 ;" \ 213 " nop ;" \ 214 " .align 2 ;" \ 215 "1: .long ~0x20000000;" \ 216 "2:;" \ 217 : "=r"(r0), "=r"(pc)); \ 218 } while (0) 219 220 /* 221 * If RUN_P1 is the last thing we do in a function we can omit it, b/c 222 * we are going to return to a P1 caller anyway, but we still need to 223 * ensure there's at least 8 instructions before jump to P1. 224 */ 225 #define PAD_P1_SWITCH __asm volatile ("nop;nop;nop;nop;nop;nop;nop;nop;") 226 227 #else /* __lint__ */ 228 #define RUN_P2 do {} while (/* CONSTCOND */ 0) 229 #define RUN_P1 do {} while (/* CONSTCOND */ 0) 230 #define PAD_P1_SWITCH do {} while (/* CONSTCOND */ 0) 231 #endif 232 #endif 233 234 #if defined(SH4) 235 /* SH4 Processor Version Register */ 236 #define SH4_PVR_ADDR 0xff000030 /* P4 address */ 237 #define SH4_PVR (*(volatile uint32_t *) SH4_PVR_ADDR) 238 #define SH4_PRR_ADDR 0xff000044 /* P4 address */ 239 #define SH4_PRR (*(volatile uint32_t *) SH4_PRR_ADDR) 240 241 #define SH4_PVR_MASK 0xffffff00 242 #define SH4_PVR_SH7750 0x04020500 /* SH7750 */ 243 #define SH4_PVR_SH7750S 0x04020600 /* SH7750S */ 244 #define SH4_PVR_SH775xR 0x04050000 /* SH775xR */ 245 #define SH4_PVR_SH7751 0x04110000 /* SH7751 */ 246 247 #define SH4_PRR_MASK 0xfffffff0 248 #define SH4_PRR_7750R 0x00000100 /* SH7750R */ 249 #define SH4_PRR_7751R 0x00000110 /* SH7751R */ 250 #endif 251 252 /* 253 * pull in #defines for kinds of processors 254 */ 255 #include <machine/cputypes.h> 256 257 #ifdef _KERNEL 258 void sh_cpu_init(int, int); 259 void sh_startup(void); 260 __dead void cpu_reset(void); /* soft reset */ 261 void _cpu_spin(uint32_t); /* for delay loop. */ 262 void delay(int); 263 struct pcb; 264 void savectx(struct pcb *); 265 struct fpreg; 266 void fpu_save(struct fpreg *); 267 void fpu_restore(struct fpreg *); 268 u_int cpu_dump(int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t *); 269 u_int cpu_dumpsize(void); 270 void dumpconf(void); 271 void dumpsys(void); 272 #endif /* _KERNEL */ 273 #endif /* !_SH_CPU_H_ */ 274