Annotation of sys/arch/sparc/include/ctlreg.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ctlreg.h,v 1.7 2003/06/02 23:27:54 millert Exp $ */
2: /* $NetBSD: ctlreg.h,v 1.15 1997/07/20 18:55:03 pk Exp $ */
3:
4: /*
5: * Copyright (c) 1996
6: * The President and Fellows of Harvard College. All rights reserved.
7: * Copyright (c) 1992, 1993
8: * The Regents of the University of California. All rights reserved.
9: *
10: * This software was developed by the Computer Systems Engineering group
11: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
12: * contributed to Berkeley.
13: *
14: * All advertising materials mentioning features or use of this software
15: * must display the following acknowledgement:
16: * This product includes software developed by Harvard University.
17: * This product includes software developed by the University of
18: * California, Lawrence Berkeley Laboratory.
19: *
20: * Redistribution and use in source and binary forms, with or without
21: * modification, are permitted provided that the following conditions
22: * are met:
23: * 1. Redistributions of source code must retain the above copyright
24: * notice, this list of conditions and the following disclaimer.
25: * 2. Redistributions in binary form must reproduce the above copyright
26: * notice, this list of conditions and the following disclaimer in the
27: * documentation and/or other materials provided with the distribution.
28: * 3. Neither the name of the University nor the names of its contributors
29: * may be used to endorse or promote products derived from this software
30: * without specific prior written permission.
31: *
32: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42: * SUCH DAMAGE.
43: *
44: * @(#)ctlreg.h 8.1 (Berkeley) 6/11/93
45: */
46:
47: /*
48: * Sun4m support by Aaron Brown, Harvard University.
49: * Changes Copyright (c) 1995 The President and Fellows of Harvard College.
50: * All rights reserved.
51: */
52:
53: /*
54: * Sun 4, 4c, and 4m control registers. (includes address space definitions
55: * and some registers in control space).
56: */
57:
58: /*
59: * The Alternate address spaces.
60: */
61:
62: /* 0x00 unused */
63: /* 0x01 unused */
64: #define ASI_CONTROL 0x02 /* cache enable, context reg, etc */
65: #define ASI_SEGMAP 0x03 /* [4/4c] segment maps */
66: #define ASI_SRMMUFP 0x03 /* [4m] ref mmu flush/probe */
67: #define ASI_PTE 0x04 /* [4/4c] PTE space (pmegs) */
68: #define ASI_SRMMU 0x04 /* [4m] ref mmu registers */
69: #define ASI_REGMAP 0x06 /* [4/3-level MMU ] region maps */
70: #define ASI_HWFLUSHSEG 0x05 /* [4/4c] hardware assisted version of FLUSHSEG */
71: #define ASI_HWFLUSHPG 0x06 /* [4/4c] hardware assisted version of FLUSHPG */
72: #define ASI_SRMMUDIAG 0x06 /* [4m] */
73: #define ASI_HWFLUSHCTX 0x07 /* [4/4c] hardware assisted version of FLUSHCTX */
74:
75: #define ASI_USERI 0x08 /* I-space (user) */
76: #define ASI_KERNELI 0x09 /* I-space (kernel) */
77: #define ASI_USERD 0x0a /* D-space (user) */
78: #define ASI_KERNELD 0x0b /* D-space (kernel) */
79:
80: #define ASI_FLUSHREG 0x7 /* [4/4c] flush cache by region */
81: #define ASI_FLUSHSEG 0x0c /* [4/4c] flush cache by segment */
82: #define ASI_FLUSHPG 0x0d /* [4/4c] flush cache by page */
83: #define ASI_FLUSHCTX 0x0e /* [4/4c] flush cache by context */
84:
85: #define ASI_DCACHE 0x0f /* [4] flush data cache */
86:
87: #define ASI_ICACHETAG 0x0c /* [4m] instruction cache tag */
88: #define ASI_ICACHEDATA 0x0d /* [4m] instruction cache data */
89: #define ASI_DCACHETAG 0x0e /* [4m] data cache tag */
90: #define ASI_DCACHEDATA 0x0f /* [4m] data cache data */
91: #define ASI_IDCACHELFP 0x10 /* [4m] flush i&d cache line (page) */
92: #define ASI_IDCACHELFS 0x11 /* [4m] flush i&d cache line (seg) */
93: #define ASI_IDCACHELFR 0x12 /* [4m] flush i&d cache line (reg) */
94: #define ASI_IDCACHELFC 0x13 /* [4m] flush i&d cache line (ctxt) */
95: #define ASI_IDCACHELFU 0x14 /* [4m] flush i&d cache line (user) */
96: #define ASI_BYPASS 0x20 /* [4m] sun ref mmu bypass,
97: ie. direct phys access */
98: #define ASI_HICACHECLR 0x31 /* [4m] hypersparc only: I-cache flash clear */
99: #define ASI_ICACHECLR 0x36 /* [4m] ms1 only: I-cache flash clear */
100: #define ASI_DCACHECLR 0x37 /* [4m] ms1 only: D-cache flash clear */
101: #define ASI_DCACHEDIAG 0x39 /* [4m] data cache diagnostic register access */
102:
103: /*
104: * [4/4c] Registers in the control space (ASI_CONTROL).
105: */
106: #define AC_IDPROM 0x00000000 /* [4] ID PROM */
107: #define AC_CONTEXT 0x30000000 /* [4/4c] context register (byte) */
108: #define AC_SYSENABLE 0x40000000 /* [4/4c] system enable register (byte) */
109: #define AC_DVMA_ENABLE 0x50000000 /* [4] enable user dvma */
110: #define AC_BUS_ERR 0x60000000 /* [4] bus error register */
111: #define AC_SYNC_ERR 0x60000000 /* [4c] sync (memory) error reg */
112: #define AC_SYNC_VA 0x60000004 /* [4c] sync error virtual addr */
113: #define AC_ASYNC_ERR 0x60000008 /* [4c] async error reg */
114: #define AC_ASYNC_VA 0x6000000c /* [4c] async error virtual addr */
115: #define AC_DIAG_REG 0x70000000 /* [4] diagnostic reg */
116: #define AC_CACHETAGS 0x80000000 /* [4/4c?] cache tag base address */
117: #define AC_CACHEDATA 0x90000000 /* [4] cached data [sun4/400?] */
118: #define AC_DVMA_MAP 0xd0000000 /* [4] user dvma map entries */
119: #define AC_VMEINTVEC 0xe0000000 /* [4] vme interrupt vector */
120: #define AC_SERIAL 0xf0000000 /* [4/4c] special serial port sneakiness */
121: /* AC_SERIAL is not used in the kernel (it is for the PROM) */
122:
123: /* XXX: does not belong here */
124: #define ME_REG_IERR 0x80 /* memory err ctrl reg error intr pending bit */
125:
126: /*
127: * [4/4c]
128: * Bits in sync error register. Reading the register clears these;
129: * otherwise they accumulate. The error(s) occurred at the virtual
130: * address stored in the sync error address register, and may have
131: * been due to, e.g., what would usually be called a page fault.
132: * Worse, the bits accumulate during instruction prefetch, so
133: * various bits can be on that should be off.
134: */
135: #define SER_WRITE 0x8000 /* error occurred during write */
136: #define SER_INVAL 0x80 /* PTE had PG_V off */
137: #define SER_PROT 0x40 /* operation violated PTE prot */
138: #define SER_TIMEOUT 0x20 /* bus timeout (non-existent mem) */
139: #define SER_SBUSERR 0x10 /* S-Bus bus error */
140: #define SER_MEMERR 0x08 /* memory ecc/parity error */
141: #define SER_SZERR 0x02 /* [4/vme?] size error, whatever that is */
142: #define SER_WATCHDOG 0x01 /* watchdog reset (never see this) */
143:
144: #define SER_BITS \
145: "\20\20WRITE\10INVAL\7PROT\6TIMEOUT\5SBUSERR\4MEMERR\2SZERR\1WATCHDOG"
146:
147: /*
148: * [4/4c]
149: * Bits in async error register (errors from DVMA or Sun-4 cache
150: * writeback). The corresponding bit is also set in the sync error reg.
151: *
152: * A writeback invalid error means there is a bug in the PTE manager.
153: *
154: * The word is that the async error register does not work right.
155: */
156: #define AER_WBINVAL 0x80 /* writeback found PTE without PG_V */
157: #define AER_TIMEOUT 0x20 /* bus timeout */
158: #define AER_DVMAERR 0x10 /* bus error during DVMA */
159:
160: #define AER_BITS "\20\10WBINVAL\6TIMEOUT\5DVMAERR"
161:
162: /*
163: * [4/4c] Bits in system enable register.
164: */
165: #define SYSEN_DVMA 0x20 /* Enable dvma */
166: #define SYSEN_CACHE 0x10 /* Enable cache */
167: #define SYSEN_IOCACHE 0x40 /* Enable IO cache */
168: #define SYSEN_VIDEO 0x08 /* Enable on-board video */
169: #define SYSEN_RESET 0x04 /* Reset the hardware */
170: #define SYSEN_RESETVME 0x02 /* Reset the VME bus */
171:
172:
173: /*
174: * [4m] Bits in ASI_CONTROL? space, sun4m only.
175: */
176: #define MXCC_ENABLE_ADDR 0x1c00a00 /* Enable register for MXCC */
177: #define MXCC_ENABLE_BIT 0x4 /* Enable bit for MXCC */
178:
179: /*
180: * Bits in ASI_SRMMUFP space.
181: * Bits 8-11 determine the type of flush/probe.
182: * Address bits 12-31 hold the page frame.
183: */
184: #define ASI_SRMMUFP_L3 (0<<8) /* probe L3 | flush L3 PTE */
185: #define ASI_SRMMUFP_L2 (1<<8) /* probe L2 | flush L2/L3 PTE/PTD's */
186: #define ASI_SRMMUFP_L1 (2<<8) /* probe L1 | flush L1/L2/L3 PTE/PTD's*/
187: #define ASI_SRMMUFP_L0 (3<<8) /* probe L0 | flush L0/L1/L2/L3 PTE/PTD's */
188: #define ASI_SRMMUFP_LN (4<<8) /* probe all | flush all levels */
189:
190: /*
191: * [4m] Registers and bits in the SPARC Reference MMU (ASI_SRMMU).
192: */
193: #define SRMMU_PCR 0x00000000 /* Processor control register */
194: #define SRMMU_CXTPTR 0x00000100 /* Context table pointer register */
195: #define SRMMU_CXR 0x00000200 /* Context register */
196: #define SRMMU_SFSR 0x00000300 /* Synchronous fault status reg */
197: #define SRMMU_SFAR 0x00000400 /* Synchronous fault address reg */
198: #define SRMMU_AFSR 0x00000500 /* Asynchronous fault status reg (HS)*/
199: #define SRMMU_AFAR 0x00000600 /* Asynchronous fault address reg (HS)*/
200: #define SRMMU_PCFG 0x00000600 /* Processor configuration reg (TURBO)*/
201: #define SRMMU_TLBCTRL 0x00001000 /* TLB replacement control reg */
202:
203:
204: /*
205: * [4m] Bits in SRMMU control register. One set per module.
206: */
207: #define VIKING_PCR_ME 0x00000001 /* MMU Enable */
208: #define VIKING_PCR_NF 0x00000002 /* Fault inhibit bit */
209: #define VIKING_PCR_PSO 0x00000080 /* Partial Store Ordering enable */
210: #define VIKING_PCR_DCE 0x00000100 /* Data cache enable bit */
211: #define VIKING_PCR_ICE 0x00000200 /* SuperSPARC instr. cache enable */
212: #define VIKING_PCR_SB 0x00000400 /* Store buffer enable bit */
213: #define VIKING_PCR_MB 0x00000800 /* MBus mode: 0=MXCC, 1=no MXCC */
214: #define VIKING_PCR_PE 0x00001000 /* Enable memory parity checking */
215: #define VIKING_PCR_BM 0x00002000 /* 1 iff booting */
216: #define VIKING_PCR_SE 0x00004000 /* Coherent bus snoop enable */
217: #define VIKING_PCR_AC 0x00008000 /* 1=cache non-MMU accesses */
218: #define VIKING_PCR_TC 0x00010000 /* 1=cache table walks */
219:
220: #define HYPERSPARC_PCR_ME 0x00000001 /* MMU Enable */
221: #define HYPERSPARC_PCR_NF 0x00000002 /* Fault inhibit bit */
222: #define HYPERSPARC_PCR_CE 0x00000100 /* Cache enable bit */
223: #define HYPERSPARC_PCR_CM 0x00000400 /* Cache mode: 1=write-back */
224: #define HYPERSPARC_PCR_MR 0x00000800 /* Memory reflection: 1 = on */
225: #define HYPERSPARC_PCR_CS 0x00001000 /* cache size: 1=256k, 0=128k */
226: #define HYPERSPARC_PCR_C 0x00002000 /* enable cache when MMU off */
227: #define HYPERSPARC_PCR_BM 0x00004000 /* 1 iff booting */
228: #define HYPERSPARC_PCR_MID 0x00078000 /* MBus module ID MID<3:0> */
229: #define HYPERSPARC_PCR_WBE 0x00080000 /* Write buffer enable */
230: #define HYPERSPARC_PCR_SE 0x00100000 /* Coherent bus snoop enable */
231: #define HYPERSPARC_PCR_CWR 0x00200000 /* Cache wrap enable */
232:
233: #define CYPRESS_PCR_ME 0x00000001 /* MMU Enable */
234: #define CYPRESS_PCR_NF 0x00000002 /* Fault inhibit bit */
235: #define CYPRESS_PCR_CE 0x00000100 /* Cache enable bit */
236: #define CYPRESS_PCR_CL 0x00000200 /* Cache Lock (604 only) */
237: #define CYPRESS_PCR_CM 0x00000400 /* Cache mode: 1=write-back */
238: #define CYPRESS_PCR_MR 0x00000800 /* Memory reflection: 1=on (605 only) */
239: #define CYPRESS_PCR_C 0x00002000 /* enable cache when MMU off */
240: #define CYPRESS_PCR_BM 0x00004000 /* 1 iff booting */
241: #define CYPRESS_PCR_MID 0x00078000 /* MBus module ID MID<3:0> (605 only) */
242: #define CYPRESS_PCR_MV 0x00080000 /* Multichip Valid */
243: #define CYPRESS_PCR_MCM 0x00300000 /* Multichip Mask */
244: #define CYPRESS_PCR_MCA 0x00c00000 /* Multichip Address */
245:
246: #define MS1_PCR_ME 0x00000001 /* MMU Enable */
247: #define MS1_PCR_NF 0x00000002 /* Fault inhibit bit */
248: #define MS1_PCR_DCE 0x00000100 /* Data cache enable */
249: #define MS1_PCR_ICE 0x00000200 /* Instruction cache enable */
250: #define MS1_PCR_RC 0x00000c00 /* DRAM Refresh control */
251: #define MS1_PCR_PE 0x00001000 /* Enable memory parity checking */
252: #define MS1_PCR_BM 0x00004000 /* 1 iff booting */
253: #define MS1_PCR_AC 0x00008000 /* 1=cache if ME==0 (and [ID]CE on) */
254: #define MS1_PCR_ID 0x00010000 /* 1=disable ITBR */
255: #define MS1_PCR_PC 0x00020000 /* Parity control: 0=even,1=odd */
256: #define MS1_PCR_MV 0x00100000 /* Memory data View (diag) */
257: #define MS1_PCR_DV 0x00200000 /* Data View (diag) */
258: #define MS1_PCR_AV 0x00400000 /* Address View (diag) */
259: #define MS1_PCR_STW 0x00800000 /* Software Tablewalk enable */
260:
261: #define SWIFT_PCR_ME 0x00000001 /* MMU Enable */
262: #define SWIFT_PCR_NF 0x00000002 /* Fault inhibit bit */
263: #define SWIFT_PCR_DCE 0x00000100 /* Data cache enable */
264: #define SWIFT_PCR_ICE 0x00000200 /* Instruction cache enable */
265: #define SWIFT_PCR_RC 0x00003c00 /* DRAM Refresh control */
266: #define SWIFT_PCR_BM 0x00004000 /* 1 iff booting */
267: #define SWIFT_PCR_AC 0x00008000 /* 1=cache if ME=0 (and [ID]CE on) */
268: #define SWIFT_PCR_PA 0x00010000 /* TCX/SX control */
269: #define SWIFT_PCR_PC 0x00020000 /* Parity control: 0=even,1=odd */
270: #define SWIFT_PCR_PE 0x00040000 /* Enable memory parity checking */
271: #define SWIFT_PCR_PMC 0x00180000 /* Page mode control */
272: #define SWIFT_PCR_BF 0x00200000 /* Branch Folding */
273: #define SWIFT_PCR_WP 0x00400000 /* Watch point enable */
274: #define SWIFT_PCR_STW 0x00800000 /* Software Tablewalk enable */
275:
276: #define TURBOSPARC_PCR_ME 0x00000001 /* MMU Enable */
277: #define TURBOSPARC_PCR_NF 0x00000002 /* Fault inhibit bit */
278: #define TURBOSPARC_PCR_ICS 0x00000004 /* I-cache snoop enable */
279: #define TURBOSPARC_PCR_PSO 0x00000008 /* Partial Store order (ro!) */
280: #define TURBOSPARC_PCR_DCE 0x00000100 /* Data cache enable */
281: #define TURBOSPARC_PCR_ICE 0x00000200 /* Instruction cache enable */
282: #define TURBOSPARC_PCR_RC 0x00003c00 /* DRAM Refresh control */
283: #define TURBOSPARC_PCR_BM 0x00004000 /* 1 iff booting */
284: #define TURBOSPARC_PCR_PC 0x00020000 /* Parity ctrl: 0=even,1=odd */
285: #define TURBOSPARC_PCR_PE 0x00040000 /* Enable parity checking */
286: #define TURBOSPARC_PCR_PMC 0x00180000 /* Page mode control */
287:
288: /* The Turbosparc's Processor Configuration Register */
289: #define TURBOSPARC_PCFG_SCC 0x00000007 /* e-cache config */
290: #define TURBOSPARC_PCFG_SE 0x00000008 /* e-cache enable */
291: #define TURBOSPARC_PCFG_US2 0x00000010 /* microsparc II compat */
292: #define TURBOSPARC_PCFG_WT 0x00000020 /* write-through enable */
293: #define TURBOSPARC_PCFG_SBC 0x000000c0 /* SBus Clock */
294: #define TURBOSPARC_PCFG_WS 0x03800000 /* DRAM wait states */
295: #define TURBOSPARC_PCFG_RAH 0x0c000000 /* DRAM Row Address Hold */
296: #define TURBOSPARC_PCFG_AXC 0x30000000 /* AFX Clock */
297: #define TURBOSPARC_PCFG_SNP 0x40000000 /* DVMA Snoop enable */
298: #define TURBOSPARC_PCFG_IOCLK 0x80000000 /* I/O clock ratio */
299:
300:
301: /* Implementation and Version fields are common to all modules */
302: #define SRMMU_PCR_VER 0x0f000000 /* Version of MMU implementation */
303: #define SRMMU_PCR_IMPL 0xf0000000 /* Implementation number of MMU */
304:
305:
306: /* [4m] Bits in the Synchronous Fault Status Register */
307: #define SFSR_EM 0x00020000 /* Error mode watchdog reset occurred */
308: #define SFSR_CS 0x00010000 /* Control Space error */
309: #define SFSR_PERR 0x00006000 /* Parity error code */
310: #define SFSR_SB 0x00008000 /* SS: Store Buffer Error */
311: #define SFSR_P 0x00004000 /* SS: Parity error */
312: #define SFSR_UC 0x00001000 /* Uncorrectable error */
313: #define SFSR_TO 0x00000800 /* S-Bus timeout */
314: #define SFSR_BE 0x00000400 /* S-Bus bus error */
315: #define SFSR_LVL 0x00000300 /* Pagetable level causing the fault */
316: #define SFSR_AT 0x000000e0 /* Access type */
317: #define SFSR_FT 0x0000001c /* Fault type */
318: #define SFSR_FAV 0x00000002 /* Fault Address is valid */
319: #define SFSR_OW 0x00000001 /* Overwritten with new fault */
320:
321: #define SFSR_BITS \
322: "\20\21CSERR\17PARITY\16SYSERR\15UNCORR\14TIMEOUT\13BUSERR\2FAV\1OW"
323:
324: /* [4m] Synchronous Fault Types */
325: #define SFSR_FT_NONE (0 << 2) /* no fault */
326: #define SFSR_FT_INVADDR (1 << 2) /* invalid address fault */
327: #define SFSR_FT_PROTERR (2 << 2) /* protection fault */
328: #define SFSR_FT_PRIVERR (3 << 2) /* privelege violation */
329: #define SFSR_FT_TRANSERR (4 << 2) /* translation fault */
330: #define SFSR_FT_BUSERR (5 << 2) /* access bus error */
331: #define SFSR_FT_INTERR (6 << 2) /* internal error */
332: #define SFSR_FT_RESERVED (7 << 2) /* reserved */
333:
334: /* [4m] Synchronous Fault Access Types */
335: #define SFSR_AT_LDUDATA (0 << 5) /* Load user data */
336: #define SFSR_AT_LDSDATA (1 << 5) /* Load supervisor data */
337: #define SFSR_AT_LDUTEXT (2 << 5) /* Load user text */
338: #define SFSR_AT_LDSTEXT (3 << 5) /* Load supervisor text */
339: #define SFSR_AT_STUDATA (4 << 5) /* Store user data */
340: #define SFSR_AT_STSDATA (5 << 5) /* Store supervisor data */
341: #define SFSR_AT_STUTEXT (6 << 5) /* Store user text */
342: #define SFSR_AT_STSTEXT (7 << 5) /* Store supervisor text */
343: #define SFSR_AT_SUPERVISOR (1 << 5) /* Set iff supervisor */
344: #define SFSR_AT_TEXT (2 << 5) /* Set iff text */
345: #define SFSR_AT_STORE (4 << 5) /* Set iff store */
346:
347: /* [4m] Synchronous Fault PT Levels */
348: #define SFSR_LVL_0 (0 << 8) /* Context table entry */
349: #define SFSR_LVL_1 (1 << 8) /* Region table entry */
350: #define SFSR_LVL_2 (2 << 8) /* Segment table entry */
351: #define SFSR_LVL_3 (3 << 8) /* Page table entry */
352:
353: /* [4m] Asynchronous Fault Status Register bits */
354: #define AFSR_AFO 0x00000001 /* Async. fault occurred */
355: #define AFSR_AFA 0x000000f0 /* Bits <35:32> of faulting phys addr */
356: #define AFSR_AFA_RSHIFT 4 /* Shift to get AFA to bit 0 */
357: #define AFSR_AFA_LSHIFT 28 /* Shift to get AFA to bit 32 */
358: #define AFSR_BE 0x00000400 /* Bus error */
359: #define AFSR_TO 0x00000800 /* Bus timeout */
360: #define AFSR_UC 0x00001000 /* Uncorrectable error */
361: #define AFSR_SE 0x00002000 /* System error */
362:
363: #define AFSR_BITS "\20\16SYSERR\15UNCORR\14TIMEOUT\13BUSERR\1AFO"
364:
365: /* [4m] TLB Replacement Control Register bits */
366: #define TLBC_DISABLE 0x00000020 /* Disable replacement counter */
367: #define TLBC_RCNTMASK 0x0000001f /* Replacement counter (0-31) */
368:
369: /*
370: * The Ross Hypersparc has an Instruction Cache Control Register (ICCR)
371: * It contains an enable bit for the on-chip instruction cache and a bit
372: * that controls whether a FLUSH instruction causes an Unimplemented
373: * Flush Trap or just flushes the appropriate instruction cache line.
374: * The ICCR register is implemented as Ancillary State register number 31.
375: */
376: #define HYPERSPARC_ICCR_ICE 1 /* Instruction cache enable */
377: #define HYPERSPARC_ICCR_FTD 2 /* Unimpl. flush trap disable */
378: #define HYPERSPARC_ASRNUM_ICCR 31 /* ICCR == ASR#31 */
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