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1 | /* |
2 | * Copyright (c) 1988 University of Utah. | |
3 | * Copyright (c) 1982, 1990 The Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
6 | * This code is derived from software contributed to Berkeley by | |
7 | * the Systems Programming Group of the University of Utah Computer | |
8 | * Science Department. | |
9 | * | |
10 | * %sccs.include.redist.c% | |
11 | * | |
9e153d67 | 12 | * from: Utah $Hdr: cpu.h 1.16 91/03/25$ |
88a7e859 | 13 | * |
98967f47 | 14 | * @(#)cpu.h 7.13 (Berkeley) %G% |
ba327c15 MK |
15 | */ |
16 | ||
ba327c15 MK |
17 | /* |
18 | * Exported definitions unique to hp300/68k cpu support. | |
19 | */ | |
20 | ||
21 | /* | |
22 | * definitions of cpu-dependent requirements | |
23 | * referenced in generic code | |
24 | */ | |
25 | #define COPY_SIGCODE /* copy sigcode above user stack in exec */ | |
26 | ||
ba327c15 | 27 | #define cpu_exec(p) /* nothing */ |
54ba99e8 | 28 | #define cpu_wait(p) /* nothing */ |
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29 | #define cpu_setstack(p, ap) \ |
30 | (p)->p_md.md_regs[SP] = ap | |
ba327c15 MK |
31 | |
32 | /* | |
e19239c3 CT |
33 | * Arguments to hardclock and gatherstats encapsulate the previous |
34 | * machine state in an opaque clockframe. One the hp300, we use | |
98967f47 | 35 | * what the hardware pushes on an interrupt (frame format 0). |
ba327c15 | 36 | */ |
cf8f54d4 | 37 | struct clockframe { |
cf8f54d4 CT |
38 | u_short sr; /* sr at time of interrupt */ |
39 | u_long pc; /* pc at time of interrupt */ | |
40 | u_short vo; /* vector offset (4-word frame) */ | |
41 | }; | |
ba327c15 | 42 | |
cf8f54d4 CT |
43 | #define CLKF_USERMODE(framep) (((framep)->sr & PSL_S) == 0) |
44 | #define CLKF_BASEPRI(framep) (((framep)->sr & PSL_IPL) == 0) | |
ba327c15 | 45 | #define CLKF_PC(framep) ((framep)->pc) |
cf8f54d4 CT |
46 | #if 0 |
47 | /* We would like to do it this way... */ | |
48 | #define CLKF_INTR(framep) (((framep)->sr & PSL_M) == 0) | |
49 | #else | |
50 | /* but until we start using PSL_M, we have to do this instead */ | |
51 | #define CLKF_INTR(framep) (0) /* XXX */ | |
52 | #endif | |
ba327c15 MK |
53 | |
54 | ||
55 | /* | |
56 | * Preempt the current process if in interrupt from user mode, | |
57 | * or after the current trap/syscall if in system mode. | |
58 | */ | |
59 | #define need_resched() { want_resched++; aston(); } | |
60 | ||
ba327c15 | 61 | /* |
cf8f54d4 CT |
62 | * Give a profiling tick to the current process when the user profiling |
63 | * buffer pages are invalid. On the hp300, request an ast to send us | |
64 | * through trap, marking the proc as needing a profiling tick. | |
ba327c15 | 65 | */ |
cf8f54d4 | 66 | #define need_proftick(p) { (p)->p_flag |= SOWEUPC; aston(); } |
ba327c15 | 67 | |
600bf028 MK |
68 | /* |
69 | * Notify the current process (p) that it has a signal pending, | |
70 | * process as soon as possible. | |
71 | */ | |
72 | #define signotify(p) aston() | |
73 | ||
74 | #define aston() (astpending++) | |
75 | ||
76 | int astpending; /* need to trap before returning to user mode */ | |
ba327c15 MK |
77 | int want_resched; /* resched() was called */ |
78 | ||
79 | ||
80 | /* | |
81 | * simulated software interrupt register | |
82 | */ | |
83 | extern unsigned char ssir; | |
84 | ||
85 | #define SIR_NET 0x1 | |
86 | #define SIR_CLOCK 0x2 | |
87 | ||
88 | #define siroff(x) ssir &= ~(x) | |
89 | #define setsoftnet() ssir |= SIR_NET | |
90 | #define setsoftclock() ssir |= SIR_CLOCK | |
91 | ||
92 | ||
93 | ||
94 | /* | |
95 | * The rest of this should probably be moved to ../hp300/hp300cpu.h, | |
96 | * although some of it could probably be put into generic 68k headers. | |
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97 | */ |
98 | ||
99 | /* values for machineid */ | |
4534a638 KM |
100 | #define HP_320 0 /* 16Mhz 68020+HP MMU+16K external cache */ |
101 | #define HP_330 1 /* 16Mhz 68020+68851 MMU */ | |
102 | #define HP_350 2 /* 25Mhz 68020+HP MMU+32K external cache */ | |
103 | #define HP_360 3 /* 25Mhz 68030 */ | |
104 | #define HP_370 4 /* 33Mhz 68030+64K external cache */ | |
105 | #define HP_340 5 /* 16Mhz 68030 */ | |
106 | #define HP_375 6 /* 50Mhz 68030+32K external cache */ | |
9acfa6cd | 107 | #define HP_380 7 /* 25Mhz 68040 */ |
98967f47 | 108 | #define HP_433 8 /* 33Mhz 68040 */ |
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109 | |
110 | /* values for mmutype (assigned for quick testing) */ | |
9acfa6cd | 111 | #define MMU_68040 -2 /* 68040 on-chip MMU */ |
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112 | #define MMU_68030 -1 /* 68030 on-chip subset of 68851 */ |
113 | #define MMU_HP 0 /* HP proprietary */ | |
114 | #define MMU_68851 1 /* Motorola 68851 */ | |
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115 | |
116 | /* values for ectype */ | |
4534a638 KM |
117 | #define EC_PHYS -1 /* external physical address cache */ |
118 | #define EC_NONE 0 /* no external cache */ | |
119 | #define EC_VIRT 1 /* external virtual address cache */ | |
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120 | |
121 | /* values for cpuspeed (not really related to clock speed due to caches) */ | |
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122 | #define MHZ_8 1 |
123 | #define MHZ_16 2 | |
124 | #define MHZ_25 3 | |
125 | #define MHZ_33 4 | |
126 | #define MHZ_50 6 | |
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127 | |
128 | #ifdef KERNEL | |
129 | extern int machineid, mmutype, ectype; | |
9e153d67 | 130 | extern char *intiobase, *intiolimit; |
88a7e859 KM |
131 | |
132 | /* what is this supposed to do? i.e. how is it different than startrtclock? */ | |
133 | #define enablertclock() | |
134 | ||
135 | #endif | |
136 | ||
137 | /* physical memory sections */ | |
4534a638 | 138 | #define ROMBASE (0x00000000) |
9e153d67 MH |
139 | #define INTIOBASE (0x00400000) |
140 | #define INTIOTOP (0x00600000) | |
141 | #define EXTIOBASE (0x00600000) | |
142 | #define EXTIOTOP (0x20000000) | |
4534a638 KM |
143 | #define MAXADDR (0xFFFFF000) |
144 | ||
9e153d67 MH |
145 | /* |
146 | * Internal IO space: | |
147 | * | |
148 | * Ranges from 0x400000 to 0x600000 (IIOMAPSIZE). | |
149 | * | |
150 | * Internal IO space is mapped in the kernel from ``intiobase'' to | |
151 | * ``intiolimit'' (defined in locore.s). Since it is always mapped, | |
152 | * conversion between physical and kernel virtual addresses is easy. | |
153 | */ | |
154 | #define ISIIOVA(va) \ | |
155 | ((char *)(va) >= intiobase && (char *)(va) < intiolimit) | |
156 | #define IIOV(pa) ((int)(pa)-INTIOBASE+(int)intiobase) | |
157 | #define IIOP(va) ((int)(va)-(int)intiobase+INTIOBASE) | |
158 | #define IIOPOFF(pa) ((int)(pa)-INTIOBASE) | |
159 | #define IIOMAPSIZE btoc(INTIOTOP-INTIOBASE) /* 2mb */ | |
88a7e859 | 160 | |
9e153d67 MH |
161 | /* |
162 | * External IO space: | |
163 | * | |
164 | * DIO ranges from select codes 0-63 at physical addresses given by: | |
165 | * 0x600000 + (sc - 32) * 0x10000 | |
166 | * DIO cards are addressed in the range 0-31 [0x600000-0x800000) for | |
167 | * their control space and the remaining areas, [0x200000-0x400000) and | |
168 | * [0x800000-0x1000000), are for additional space required by a card; | |
169 | * e.g. a display framebuffer. | |
170 | * | |
171 | * DIO-II ranges from select codes 132-255 at physical addresses given by: | |
172 | * 0x1000000 + (sc - 132) * 0x400000 | |
173 | * The address range of DIO-II space is thus [0x1000000-0x20000000). | |
174 | * | |
175 | * DIO/DIO-II space is too large to map in its entirety, instead devices | |
176 | * are mapped into kernel virtual address space allocated from a range | |
177 | * of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''. | |
178 | */ | |
179 | #define DIOBASE (0x600000) | |
180 | #define DIOTOP (0x1000000) | |
181 | #define DIOCSIZE (0x10000) | |
4534a638 KM |
182 | #define DIOIIBASE (0x01000000) |
183 | #define DIOIITOP (0x20000000) | |
184 | #define DIOIICSIZE (0x00400000) | |
185 | ||
9e153d67 MH |
186 | /* |
187 | * HP MMU | |
188 | */ | |
189 | #define MMUBASE IIOPOFF(0x5F4000) | |
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190 | #define MMUSSTP 0x0 |
191 | #define MMUUSTP 0x4 | |
192 | #define MMUTBINVAL 0x8 | |
193 | #define MMUSTAT 0xC | |
88a7e859 KM |
194 | #define MMUCMD MMUSTAT |
195 | ||
4534a638 KM |
196 | #define MMU_UMEN 0x0001 /* enable user mapping */ |
197 | #define MMU_SMEN 0x0002 /* enable supervisor mapping */ | |
198 | #define MMU_CEN 0x0004 /* enable data cache */ | |
199 | #define MMU_BERR 0x0008 /* bus error */ | |
200 | #define MMU_IEN 0x0020 /* enable instruction cache */ | |
201 | #define MMU_FPE 0x0040 /* enable 68881 FP coprocessor */ | |
202 | #define MMU_WPF 0x2000 /* write protect fault */ | |
203 | #define MMU_PF 0x4000 /* page fault */ | |
204 | #define MMU_PTF 0x8000 /* page table fault */ | |
205 | ||
206 | #define MMU_FAULT (MMU_PTF|MMU_PF|MMU_WPF|MMU_BERR) | |
207 | #define MMU_ENAB (MMU_UMEN|MMU_SMEN|MMU_IEN|MMU_FPE) | |
208 | ||
9e153d67 MH |
209 | /* |
210 | * 68851 and 68030 MMU | |
211 | */ | |
4534a638 KM |
212 | #define PMMU_LVLMASK 0x0007 |
213 | #define PMMU_INV 0x0400 | |
214 | #define PMMU_WP 0x0800 | |
215 | #define PMMU_ALV 0x1000 | |
216 | #define PMMU_SO 0x2000 | |
217 | #define PMMU_LV 0x4000 | |
218 | #define PMMU_BE 0x8000 | |
4534a638 KM |
219 | #define PMMU_FAULT (PMMU_WP|PMMU_INV) |
220 | ||
9acfa6cd MH |
221 | /* |
222 | * 68040 MMU | |
223 | */ | |
224 | #define MMU4_RES 0x001 | |
225 | #define MMU4_TTR 0x002 | |
226 | #define MMU4_WP 0x004 | |
227 | #define MMU4_MOD 0x010 | |
228 | #define MMU4_CMMASK 0x060 | |
229 | #define MMU4_SUP 0x080 | |
230 | #define MMU4_U0 0x100 | |
231 | #define MMU4_U1 0x200 | |
232 | #define MMU4_GLB 0x400 | |
233 | #define MMU4_BE 0x800 | |
234 | ||
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235 | /* 680X0 function codes */ |
236 | #define FC_USERD 1 /* user data space */ | |
237 | #define FC_USERP 2 /* user program space */ | |
238 | #define FC_PURGE 3 /* HPMMU: clear TLB entries */ | |
239 | #define FC_SUPERD 5 /* supervisor data space */ | |
240 | #define FC_SUPERP 6 /* supervisor program space */ | |
241 | #define FC_CPU 7 /* CPU space */ | |
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242 | |
243 | /* fields in the 68020 cache control register */ | |
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244 | #define IC_ENABLE 0x0001 /* enable instruction cache */ |
245 | #define IC_FREEZE 0x0002 /* freeze instruction cache */ | |
246 | #define IC_CE 0x0004 /* clear instruction cache entry */ | |
247 | #define IC_CLR 0x0008 /* clear entire instruction cache */ | |
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248 | |
249 | /* additional fields in the 68030 cache control register */ | |
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250 | #define IC_BE 0x0010 /* instruction burst enable */ |
251 | #define DC_ENABLE 0x0100 /* data cache enable */ | |
252 | #define DC_FREEZE 0x0200 /* data cache freeze */ | |
253 | #define DC_CE 0x0400 /* clear data cache entry */ | |
254 | #define DC_CLR 0x0800 /* clear entire data cache */ | |
255 | #define DC_BE 0x1000 /* data burst enable */ | |
256 | #define DC_WA 0x2000 /* write allocate */ | |
257 | ||
258 | #define CACHE_ON (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) | |
259 | #define CACHE_OFF (DC_CLR|IC_CLR) | |
260 | #define CACHE_CLR (CACHE_ON) | |
261 | #define IC_CLEAR (DC_WA|DC_BE|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) | |
262 | #define DC_CLEAR (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_ENABLE) | |
9acfa6cd MH |
263 | |
264 | /* 68040 cache control register */ | |
265 | #define IC4_ENABLE 0x8000 /* instruction cache enable bit */ | |
266 | #define DC4_ENABLE 0x80000000 /* data cache enable bit */ | |
267 | ||
268 | #define CACHE4_ON (IC4_ENABLE|DC4_ENABLE) | |
269 | #define CACHE4_OFF (0) |