/*
* cpu.h
*
* This file contains some powerpc MSR and registers access definitions.
*
* It is a stripped down version of linux ppc processor.h file...
*
* Copyright (C) 1999 Eric Valette (valette@crf.canon.fr)
* Canon Centre Recherche France.
*
* The license and distribution terms for this file may be
* found in found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#ifndef __PPC_CPU_H
#define __PPC_CPU_H
#ifdef __cplusplus
extern "C" {
#endif
/* Bit encodings for Machine State Register (MSR) */
#define MSR_POW (1<<18) /* Enable Power Management */
#define MSR_TGPR (1<<17) /* TLB Update registers in use */
#define MSR_ILE (1<<16) /* Interrupt Little-Endian enable */
#define MSR_EE (1<<15) /* External Interrupt enable */
#define MSR_PR (1<<14) /* Supervisor/User privilege */
#define MSR_FP (1<<13) /* Floating Point enable */
#define MSR_ME (1<<12) /* Machine Check enable */
#define MSR_FE0 (1<<11) /* Floating Exception mode 0 */
#define MSR_SE (1<<10) /* Single Step */
#define MSR_BE (1<<9) /* Branch Trace */
#define MSR_FE1 (1<<8) /* Floating Exception mode 1 */
#define MSR_IP (1<<6) /* Exception prefix 0x000/0xFFF */
#define MSR_IR (1<<5) /* Instruction MMU enable */
#define MSR_DR (1<<4) /* Data MMU enable */
#define MSR_RI (1<<1) /* Recoverable Exception */
#define MSR_LE (1<<0) /* Little-Endian enable */
#define MSR_ MSR_ME|MSR_RI
#define MSR_KERNEL MSR_|MSR_IR|MSR_DR
#define MSR_USER MSR_KERNEL|MSR_PR|MSR_EE
/* Bit encodings for Hardware Implementation Register (HID0)
on PowerPC 603, 604, etc. processors (not 601). */
#define HID0_EMCP (1<<31) /* Enable Machine Check pin */
#define HID0_EBA (1<<29) /* Enable Bus Address Parity */
#define HID0_EBD (1<<28) /* Enable Bus Data Parity */
#define HID0_SBCLK (1<<27)
#define HID0_EICE (1<<26)
#define HID0_ECLK (1<<25)
#define HID0_PAR (1<<24)
#define HID0_DOZE (1<<23)
#define HID0_NAP (1<<22)
#define HID0_SLEEP (1<<21)
#define HID0_DPM (1<<20)
#define HID0_ICE (1<<15) /* Instruction Cache Enable */
#define HID0_DCE (1<<14) /* Data Cache Enable */
#define HID0_ILOCK (1<<13) /* Instruction Cache Lock */
#define HID0_DLOCK (1<<12) /* Data Cache Lock */
#define HID0_ICFI (1<<11) /* Instruction Cache Flash Invalidate */
#define HID0_DCI (1<<10) /* Data Cache Invalidate */
#define HID0_SIED (1<<7) /* Serial Instruction Execution [Disable] */
#define HID0_BHTE (1<<2) /* Branch History Table Enable */
#define HID0_BTCD (1<<1) /* Branch target cache disable */
/* fpscr settings */
#define FPSCR_FX (1<<31)
#define FPSCR_FEX (1<<30)
#define _MACH_prep 1
#define _MACH_Pmac 2 /* pmac or pmac clone (non-chrp) */
#define _MACH_chrp 4 /* chrp machine */
#define _MACH_mbx 8 /* Motorola MBX board */
#define _MACH_apus 16 /* amiga with phase5 powerup */
#define _MACH_fads 32 /* Motorola FADS board */
/* see residual.h for these */
#define _PREP_Motorola 0x01 /* motorola prep */
#define _PREP_Firm 0x02 /* firmworks prep */
#define _PREP_IBM 0x00 /* ibm prep */
#define _PREP_Bull 0x03 /* bull prep */
/* these are arbitrary */
#define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */
#define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */
#define _GLOBAL(n)\
.globl n;\
n:
#define TBRU 269 /* Time base Upper/Lower (Reading) */
#define TBRL 268
#define TBWU 284 /* Time base Upper/Lower (Writing) */
#define TBWL 285
#define XER 1
#define LR 8
#define CTR 9
#define HID0 1008 /* Hardware Implementation */
#define PVR 287 /* Processor Version */
#define IBAT0U 528 /* Instruction BAT #0 Upper/Lower */
#define IBAT0L 529
#define IBAT1U 530 /* Instruction BAT #1 Upper/Lower */
#define IBAT1L 531
#define IBAT2U 532 /* Instruction BAT #2 Upper/Lower */
#define IBAT2L 533
#define IBAT3U 534 /* Instruction BAT #3 Upper/Lower */
#define IBAT3L 535
#define DBAT0U 536 /* Data BAT #0 Upper/Lower */
#define DBAT0L 537
#define DBAT1U 538 /* Data BAT #1 Upper/Lower */
#define DBAT1L 539
#define DBAT2U 540 /* Data BAT #2 Upper/Lower */
#define DBAT2L 541
#define DBAT3U 542 /* Data BAT #3 Upper/Lower */
#define DBAT3L 543
#define DMISS 976 /* TLB Lookup/Refresh registers */
#define DCMP 977
#define HASH1 978
#define HASH2 979
#define IMISS 980
#define ICMP 981
#define RPA 982
#define SDR1 25 /* MMU hash base register */
#define DAR 19 /* Data Address Register */
#define SPR0 272 /* Supervisor Private Registers */
#define SPRG0 272
#define SPR1 273
#define SPRG1 273
#define SPR2 274
#define SPRG2 274
#define SPR3 275
#define SPRG3 275
#define DSISR 18
#define SRR0 26 /* Saved Registers (exception) */
#define SRR1 27
#define IABR 1010 /* Instruction Address Breakpoint */
#define DEC 22 /* Decrementer */
#define EAR 282 /* External Address Register */
#define L2CR 1017 /* PPC 750 L2 control register */
#define THRM1 1020
#define THRM2 1021
#define THRM3 1022
#define THRM1_TIN 0x1
#define THRM1_TIV 0x2
#define THRM1_THRES (0x7f<<2)
#define THRM1_TID (1<<29)
#define THRM1_TIE (1<<30)
#define THRM1_V (1<<31)
#define THRM3_E (1<<31)
/* Segment Registers */
#define SR0 0
#define SR1 1
#define SR2 2
#define SR3 3
#define SR4 4
#define SR5 5
#define SR6 6
#define SR7 7
#define SR8 8
#define SR9 9
#define SR10 10
#define SR11 11
#define SR12 12
#define SR13 13
#define SR14 14
#define SR15 15
#ifndef ASM
typedef enum {
PPC_601 = 0x1,
PPC_603 = 0x3,
PPC_604 = 0x4,
PPC_603e = 0x6,
PPC_603ev = 0x7,
PPC_750 = 0x8,
PPC_604e = 0x9,
PPC_604r = 0xA,
PPC_620 = 0x16,
PPC_860 = 0x50,
PPC_821 = PPC_860,
PPC_UNKNOWN = 0xff
} ppc_cpu_id_t;
typedef unsigned short ppc_cpu_revision_t;
extern ppc_cpu_id_t get_ppc_cpu_type();
extern ppc_cpu_id_t current_ppc_cpu;
extern ppc_cpu_revision_t get_ppc_cpu_revision();
extern ppc_cpu_revision_t current_ppc_revision;
/*
* Routines to access the time base register
*/
static inline unsigned long long PPC_Get_timebase_register( void )
{
unsigned long tbr_low;
unsigned long tbr_high;
unsigned long tbr_high_old;
unsigned long long tbr;
do {
asm volatile( "mftbu %0" : "=r" (tbr_high_old));
asm volatile( "mftb %0" : "=r" (tbr_low));
asm volatile( "mftbu %0" : "=r" (tbr_high));
} while ( tbr_high_old != tbr_high );
tbr = tbr_high;
tbr <<= 32;
tbr |= tbr_low;
return tbr;
}
static inline void PPC_Set_timebase_register (unsigned long long tbr)
{
unsigned long tbr_low;
unsigned long tbr_high;
tbr_low = (tbr & 0xffffffff) ;
tbr_high = (tbr >> 32) & 0xffffffff;
asm volatile( "mtspr 284, %0" : : "r" (tbr_low));
asm volatile( "mtspr 285, %0" : : "r" (tbr_high));
}
#endif
#define _CPU_MSR_GET( _msr_value ) \
do { \
_msr_value = 0; \
asm volatile ("mfmsr %0" : "=&r" ((_msr_value)) : "0" ((_msr_value))); \
} while (0)
#define _CPU_MSR_SET( _msr_value ) \
{ asm volatile ("mtmsr %0" : "=&r" ((_msr_value)) : "0" ((_msr_value))); }
#define _CPU_ISR_Disable( _isr_cookie ) \
{ register unsigned int _disable_mask = MSR_EE; \
_isr_cookie = 0; \
asm volatile ( \
"mfmsr %0; andc %1,%0,%1; mtmsr %1" : \
"=&r" ((_isr_cookie)), "=&r" ((_disable_mask)) : \
"0" ((_isr_cookie)), "1" ((_disable_mask)) \
); \
}
/*
* Enable interrupts to the previous level (returned by _CPU_ISR_Disable).
* This indicates the end of an RTEMS critical section. The parameter
* _isr_cookie is not modified.
*/
#define _CPU_ISR_Enable( _isr_cookie ) \
{ \
asm volatile ( "mtmsr %0" : \
"=r" ((_isr_cookie)) : \
"0" ((_isr_cookie))); \
}
/*
* This temporarily restores the interrupt to _isr_cookie before immediately
* disabling them again. This is used to divide long RTEMS critical
* sections into two or more parts. The parameter _isr_cookie is not
* modified.
*
* NOTE: The version being used is not very optimized but it does
* not trip a problem in gcc where the disable mask does not
* get loaded. Check this for future (post 10/97 gcc versions.
*/
#define _CPU_ISR_Flash( _isr_cookie ) \
{ register unsigned int _disable_mask = MSR_EE; \
asm volatile ( \
"mtmsr %0; andc %1,%0,%1; mtmsr %1" : \
"=r" ((_isr_cookie)), "=r" ((_disable_mask)) : \
"0" ((_isr_cookie)), "1" ((_disable_mask)) \
); \
}
/* end of ISR handler macros */
/*
* Simple spin delay in microsecond units for device drivers.
* This is very dependent on the clock speed of the target.
*/
#define CPU_Get_timebase_low( _value ) \
asm volatile( "mftb %0" : "=r" (_value) )
#define rtems_bsp_delay( _microseconds ) \
do { \
unsigned32 start, ticks, now; \
CPU_Get_timebase_low( start ) ; \
ticks = (_microseconds) * rtems_cpu_configuration_get_clicks_per_usec(); \
do \
CPU_Get_timebase_low( now ) ; \
while (now - start < ticks); \
} while (0)
#define rtems_bsp_delay_in_bus_cycles( _cycles ) \
do { \
unsigned32 start, now; \
CPU_Get_timebase_low( start ); \
do \
CPU_Get_timebase_low( now ); \
while (now - start < (_cycles)); \
} while (0)
#define PPC_Set_decrementer( _clicks ) \
do { \
asm volatile( "mtdec %0" : "=r" ((_clicks)) : "r" ((_clicks)) ); \
} while (0)
#ifdef __cplusplus
}
#endif
#endif /* __PPC_CPU_H */
