source: rtems/cpukit/score/cpu/powerpc/rtems/powerpc/registers.h @ a6f8daab

4.104.114.84.95
Last change on this file since a6f8daab was a6f8daab, checked in by Joel Sherrill <joel.sherrill@…>, on Feb 14, 2003 at 7:33:56 PM

2003-02-14 Till Straumann <strauman@…>

PR 347/rtems

  • rtems/powerpc/registers.h (PPC_Set_decrementer): Correct inline assembly so it correctly generates on newer gcc's.
  • Property mode set to 100644
File size: 8.9 KB
Line 
1/*
2 * This file contains some powerpc MSR and registers access definitions.
3 *
4 * Copyright (C) 1999  Eric Valette (valette@crf.canon.fr)
5 *                     Canon Centre Recherche France.
6 *
7 *  Added MPC8260 Andy Dachs <a.dachs@sstl.co.uk>
8 *  Surrey Satellite Technology Limited
9 *
10 *
11 *  The license and distribution terms for this file may be
12 *  found in found in the file LICENSE in this distribution or at
13 *  http://www.OARcorp.com/rtems/license.html.
14 *
15 *  $Id$
16 */
17
18#ifndef __rtems_powerpc_registers_h
19#define __rtems_powerpc_registers_h
20
21#ifdef __cplusplus
22extern "C" {
23#endif
24
25/* Bit encodings for Machine State Register (MSR) */
26#define MSR_POW         (1<<18)         /* Enable Power Management */
27#define MSR_TGPR        (1<<17)         /* TLB Update registers in use */
28#define MSR_ILE         (1<<16)         /* Interrupt Little-Endian enable */
29#define MSR_EE          (1<<15)         /* External Interrupt enable */
30#define MSR_PR          (1<<14)         /* Supervisor/User privilege */
31#define MSR_FP          (1<<13)         /* Floating Point enable */
32#define MSR_ME          (1<<12)         /* Machine Check enable */
33#define MSR_FE0         (1<<11)         /* Floating Exception mode 0 */
34#define MSR_SE          (1<<10)         /* Single Step */
35#define MSR_BE          (1<<9)          /* Branch Trace */
36#define MSR_FE1         (1<<8)          /* Floating Exception mode 1 */
37#define MSR_IP          (1<<6)          /* Exception prefix 0x000/0xFFF */
38#define MSR_IR          (1<<5)          /* Instruction MMU enable */
39#define MSR_DR          (1<<4)          /* Data MMU enable */
40#define MSR_RI          (1<<1)          /* Recoverable Exception */
41#define MSR_LE          (1<<0)          /* Little-Endian enable */
42
43#define MSR_            MSR_ME|MSR_RI
44#define MSR_KERNEL      MSR_|MSR_IR|MSR_DR
45#define MSR_USER        MSR_KERNEL|MSR_PR|MSR_EE
46
47/* Bit encodings for Hardware Implementation Register (HID0)
48   on PowerPC 603, 604, etc. processors (not 601). */
49#define HID0_EMCP       (1<<31)         /* Enable Machine Check pin */
50#define HID0_EBA        (1<<29)         /* Enable Bus Address Parity */
51#define HID0_EBD        (1<<28)         /* Enable Bus Data Parity */
52#define HID0_SBCLK      (1<<27)
53#define HID0_EICE       (1<<26)
54#define HID0_ECLK       (1<<25)
55#define HID0_PAR        (1<<24)
56#define HID0_DOZE       (1<<23)
57#define HID0_NAP        (1<<22)
58#define HID0_SLEEP      (1<<21)
59#define HID0_DPM        (1<<20)
60#define HID0_ICE        (1<<15)         /* Instruction Cache Enable */
61#define HID0_DCE        (1<<14)         /* Data Cache Enable */
62#define HID0_ILOCK      (1<<13)         /* Instruction Cache Lock */
63#define HID0_DLOCK      (1<<12)         /* Data Cache Lock */
64#define HID0_ICFI       (1<<11)         /* Instruction Cache Flash Invalidate */
65#define HID0_DCI        (1<<10)         /* Data Cache Invalidate */
66#define HID0_SIED       (1<<7)          /* Serial Instruction Execution [Disable] */
67#define HID0_BTIC       (1<<5)          /* Branch Target Instruction Cache [Enable] */
68#define HID0_BHTE       (1<<2)          /* Branch History Table Enable */
69#define HID0_BTCD       (1<<1)          /* Branch target cache disable */
70
71/* fpscr settings */
72#define FPSCR_FX        (1<<31)
73#define FPSCR_FEX       (1<<30)
74
75#define _MACH_prep     1
76#define _MACH_Pmac     2 /* pmac or pmac clone (non-chrp) */
77#define _MACH_chrp     4 /* chrp machine */
78#define _MACH_mbx      8 /* Motorola MBX board */
79#define _MACH_apus    16 /* amiga with phase5 powerup */
80#define _MACH_fads    32 /* Motorola FADS board */
81
82/* see residual.h for these */
83#define _PREP_Motorola 0x01  /* motorola prep */
84#define _PREP_Firm     0x02  /* firmworks prep */
85#define _PREP_IBM      0x00  /* ibm prep */
86#define _PREP_Bull     0x03  /* bull prep */
87
88/* these are arbitrary */
89#define _CHRP_Motorola 0x04  /* motorola chrp, the cobra */
90#define _CHRP_IBM     0x05   /* IBM chrp, the longtrail and longtrail 2 */
91
92#define _GLOBAL(n)\
93        .globl n;\
94n:
95
96#define TBRU    269     /* Time base Upper/Lower (Reading) */
97#define TBRL    268
98#define TBWU    284     /* Time base Upper/Lower (Writing) */
99#define TBWL    285
100#define XER     1
101#define LR      8
102#define CTR     9
103#define HID0    1008    /* Hardware Implementation */
104#define PVR     287     /* Processor Version */
105#define IBAT0U  528     /* Instruction BAT #0 Upper/Lower */
106#define IBAT0L  529
107#define IBAT1U  530     /* Instruction BAT #1 Upper/Lower */
108#define IBAT1L  531
109#define IBAT2U  532     /* Instruction BAT #2 Upper/Lower */
110#define IBAT2L  533
111#define IBAT3U  534     /* Instruction BAT #3 Upper/Lower */
112#define IBAT3L  535
113#define DBAT0U  536     /* Data BAT #0 Upper/Lower */
114#define DBAT0L  537
115#define DBAT1U  538     /* Data BAT #1 Upper/Lower */
116#define DBAT1L  539
117#define DBAT2U  540     /* Data BAT #2 Upper/Lower */
118#define DBAT2L  541
119#define DBAT3U  542     /* Data BAT #3 Upper/Lower */
120#define DBAT3L  543
121#define DMISS   976     /* TLB Lookup/Refresh registers */
122#define DCMP    977
123#define HASH1   978
124#define HASH2   979
125#define IMISS   980
126#define ICMP    981
127#define RPA     982
128#define SDR1    25      /* MMU hash base register */
129#define DAR     19      /* Data Address Register */
130#define SPR0    272     /* Supervisor Private Registers */
131#define SPRG0   272
132#define SPR1    273
133#define SPRG1   273
134#define SPR2    274
135#define SPRG2   274
136#define SPR3    275
137#define SPRG3   275
138#define DSISR   18
139#define SRR0    26      /* Saved Registers (exception) */
140#define SRR1    27
141#define IABR    1010    /* Instruction Address Breakpoint */
142#define DEC     22      /* Decrementer */
143#define EAR     282     /* External Address Register */
144#define L2CR    1017    /* PPC 750 L2 control register */
145
146#define THRM1   1020
147#define THRM2   1021
148#define THRM3   1022
149#define THRM1_TIN 0x1
150#define THRM1_TIV 0x2
151#define THRM1_THRES (0x7f<<2)
152#define THRM1_TID (1<<29)
153#define THRM1_TIE (1<<30)
154#define THRM1_V   (1<<31)
155#define THRM3_E   (1<<31)
156
157/* Segment Registers */
158#define SR0     0
159#define SR1     1
160#define SR2     2
161#define SR3     3
162#define SR4     4
163#define SR5     5
164#define SR6     6
165#define SR7     7
166#define SR8     8
167#define SR9     9
168#define SR10    10
169#define SR11    11
170#define SR12    12
171#define SR13    13
172#define SR14    14
173#define SR15    15
174
175#ifndef ASM
176/*
177 *  Routines to access the time base register
178 */
179
180static inline unsigned long long PPC_Get_timebase_register( void )
181{
182  unsigned long tbr_low;
183  unsigned long tbr_high;
184  unsigned long tbr_high_old;
185  unsigned long long tbr;
186
187  do {
188    asm volatile( "mftbu %0" : "=r" (tbr_high_old));
189    asm volatile( "mftb  %0" : "=r" (tbr_low));
190    asm volatile( "mftbu %0" : "=r" (tbr_high));
191  } while ( tbr_high_old != tbr_high );
192
193  tbr = tbr_high;
194  tbr <<= 32;
195  tbr |= tbr_low;
196  return tbr;
197}
198
199static inline  void PPC_Set_timebase_register (unsigned long long tbr)
200{
201  unsigned long tbr_low;
202  unsigned long tbr_high;
203
204  tbr_low = (tbr & 0xffffffff) ;
205  tbr_high = (tbr >> 32) & 0xffffffff;
206  asm volatile( "mtspr 284, %0" : : "r" (tbr_low));
207  asm volatile( "mtspr 285, %0" : : "r" (tbr_high));
208 
209}
210#endif
211
212#define _CPU_MSR_GET( _msr_value ) \
213  do { \
214    _msr_value = 0; \
215    asm volatile ("mfmsr %0" : "=&r" ((_msr_value)) : "0" ((_msr_value))); \
216  } while (0)
217
218#define _CPU_MSR_SET( _msr_value ) \
219{ asm volatile ("mtmsr %0" : "=&r" ((_msr_value)) : "0" ((_msr_value))); }
220
221#define _CPU_ISR_Disable( _isr_cookie ) \
222  { register unsigned int _disable_mask = MSR_EE; \
223    _isr_cookie = 0; \
224    asm volatile ( \
225        "mfmsr %0; andc %1,%0,%1; mtmsr %1" : \
226        "=&r" ((_isr_cookie)), "=&r" ((_disable_mask)) : \
227        "0" ((_isr_cookie)), "1" ((_disable_mask)) \
228        ); \
229  }
230
231
232/*
233 *  Enable interrupts to the previous level (returned by _CPU_ISR_Disable).
234 *  This indicates the end of an RTEMS critical section.  The parameter
235 *  _isr_cookie is not modified.
236 */
237
238#define _CPU_ISR_Enable( _isr_cookie )  \
239  { \
240     asm volatile ( "mtmsr %0" : \
241                   "=r" ((_isr_cookie)) : \
242                   "0" ((_isr_cookie))); \
243  }
244
245/*
246 *  This temporarily restores the interrupt to _isr_cookie before immediately
247 *  disabling them again.  This is used to divide long RTEMS critical
248 *  sections into two or more parts.  The parameter _isr_cookie is not
249 *  modified.
250 *
251 *  NOTE:  The version being used is not very optimized but it does
252 *         not trip a problem in gcc where the disable mask does not
253 *         get loaded.  Check this for future (post 10/97 gcc versions.
254 */
255
256#define _CPU_ISR_Flash( _isr_cookie ) \
257  { register unsigned int _disable_mask = MSR_EE; \
258    asm volatile ( \
259      "mtmsr %0; andc %1,%0,%1; mtmsr %1" : \
260      "=r" ((_isr_cookie)), "=r" ((_disable_mask)) : \
261      "0" ((_isr_cookie)), "1" ((_disable_mask)) \
262    ); \
263  }
264
265
266/* end of ISR handler macros */
267
268/*
269 *  Simple spin delay in microsecond units for device drivers.
270 *  This is very dependent on the clock speed of the target.
271 */
272
273#define CPU_Get_timebase_low( _value ) \
274    asm volatile( "mftb  %0" : "=r" (_value) )
275
276#define rtems_bsp_delay( _microseconds ) \
277  do { \
278    unsigned32 start, ticks, now; \
279    CPU_Get_timebase_low( start ) ; \
280    ticks = (_microseconds) * rtems_cpu_configuration_get_clicks_per_usec(); \
281    do \
282      CPU_Get_timebase_low( now ) ; \
283    while (now - start < ticks); \
284  } while (0)
285
286#define rtems_bsp_delay_in_bus_cycles( _cycles ) \
287  do { \
288    unsigned32 start, now; \
289    CPU_Get_timebase_low( start ); \
290    do \
291      CPU_Get_timebase_low( now ); \
292    while (now - start < (_cycles)); \
293  } while (0)
294
295#define PPC_Set_decrementer( _clicks ) \
296  do { \
297    asm volatile( "mtdec %0" : : "r" ((_clicks)) ); \
298  } while (0)
299
300#define PPC_Get_decrementer( _clicks ) \
301    asm volatile( "mfdec  %0" : "=r" (_clicks) )
302
303#ifdef __cplusplus
304}
305#endif
306
307#endif /* __rtems_powerpc_registers_h */
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