/* SPDX-License-Identifier: GPL-2.0 */
/*
* ross . h : Ross module specific definitions and defines .
*
* Copyright ( C ) 1995 David S . Miller ( davem @ caip . rutgers . edu )
*/
#ifndef _SPARC_ROSS_H
#define _SPARC_ROSS_H
#include <asm /asi.h>
#include <asm /page.h>
/* Ross made Hypersparcs have a %psr 'impl' field of '0001'. The 'vers'
* field has ' 1111 ' .
*/
/* The MMU control register fields on the HyperSparc.
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* | implvers | RSV | CWR | SE | WBE | MID | BM | C | CS | MR | CM | RSV | CE | RSV | NF | ME |
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* 31 24 23 - 22 21 20 19 18 - 15 14 13 12 11 10 9 8 7 - 2 1 0
*
* Phew , lots of fields there ; - )
*
* CWR : Cache Wrapping Enabled , if one cache wrapping is on .
* SE : Snoop Enable , turns on bus snooping for cache activity if one .
* WBE : Write Buffer Enable , one turns it on .
* MID : The ModuleID of the chip for MBus transactions .
* BM : Boot - Mode . One indicates the MMU is in boot mode .
* C : Indicates whether accesses are cachable while the MMU is
* disabled .
* CS : Cache Size - - 0 = 128 k , 1 = 256 k
* MR : Memory Reflection , one indicates that the memory bus connected
* to the MBus supports memory reflection .
* CM : Cache Mode - - 0 = write - through , 1 = copy - back
* CE : Cache Enable - - 0 = no caching , 1 = cache is on
* NF : No Fault - - 0 = faults trap the CPU from supervisor mode
* 1 = faults from supervisor mode do not generate traps
* ME : MMU Enable - - 0 = MMU is off , 1 = MMU is on
*/
#define HYPERSPARC_CWENABLE 0 x00200000
#define HYPERSPARC_SBENABLE 0 x00100000
#define HYPERSPARC_WBENABLE 0 x00080000
#define HYPERSPARC_MIDMASK 0 x00078000
#define HYPERSPARC_BMODE 0 x00004000
#define HYPERSPARC_ACENABLE 0 x00002000
#define HYPERSPARC_CSIZE 0 x00001000
#define HYPERSPARC_MRFLCT 0 x00000800
#define HYPERSPARC_CMODE 0 x00000400
#define HYPERSPARC_CENABLE 0 x00000100
#define HYPERSPARC_NFAULT 0 x00000002
#define HYPERSPARC_MENABLE 0 x00000001
/* The ICCR instruction cache register on the HyperSparc.
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* | | FTD | ICE |
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
* 31 1 0
*
* This register is accessed using the V8 ' wrasr ' and ' rdasr '
* opcodes , since not all assemblers understand them and those
* that do use different semantics I will just hard code the
* instruction with a ' . word ' statement .
*
* FTD : If set to one flush instructions executed during an
* instruction cache hit occurs , the corresponding line
* for said cache - hit is invalidated . If FTD is zero ,
* an unimplemented ' flush ' trap will occur when any
* flush is executed by the processor .
*
* ICE : If set to one , the instruction cache is enabled . If
* zero , the cache will not be used for instruction fetches .
*
* All other bits are read as zeros , and writes to them have no
* effect .
*
* Wheee , not many assemblers understand the % iccr register nor
* the generic asr r / w instructions .
*
* 1000 0011 0100 0111 1100 0000 0000 0000 ! rd % iccr , % g1
*
* 0 x 8 3 4 7 c 0 0 0 ! 0 x8347c000
*
* 1011 1111 1000 0000 0110 0000 0000 0000 ! wr % g1 , 0 x0 , % iccr
*
* 0 x b f 8 0 6 0 0 0 ! 0 xbf806000
*
*/
#define HYPERSPARC_ICCR_FTD 0 x00000002
#define HYPERSPARC_ICCR_ICE 0 x00000001
#ifndef __ASSEMBLY__
static inline unsigned int get_ross_icr(void )
{
unsigned int icreg;
__asm__ __volatile__(".word 0x8347c000\n\t" /* rd %iccr, %g1 */
"mov %%g1, %0\n\t"
: "=r" (icreg)
: /* no inputs */
: "g1" , "memory" );
return icreg;
}
static inline void put_ross_icr(unsigned int icreg)
{
__asm__ __volatile__("or %%g0, %0, %%g1\n\t"
".word 0xbf806000\n\t" /* wr %g1, 0x0, %iccr */
"nop\n\t"
"nop\n\t"
"nop\n\t"
: /* no outputs */
: "r" (icreg)
: "g1" , "memory" );
return ;
}
/* HyperSparc specific cache flushing. */
/* This is for the on-chip instruction cache. */
static inline void hyper_flush_whole_icache(void )
{
__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
: /* no outputs */
: "i" (ASI_M_FLUSH_IWHOLE)
: "memory" );
return ;
}
extern int vac_cache_size;
extern int vac_line_size;
static inline void hyper_clear_all_tags(void )
{
unsigned long addr;
for (addr = 0 ; addr < vac_cache_size; addr += vac_line_size)
__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
: /* no outputs */
: "r" (addr), "i" (ASI_M_DATAC_TAG)
: "memory" );
}
static inline void hyper_flush_unconditional_combined(void )
{
unsigned long addr;
for (addr = 0 ; addr < vac_cache_size; addr += vac_line_size)
__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
: /* no outputs */
: "r" (addr), "i" (ASI_M_FLUSH_CTX)
: "memory" );
}
static inline void hyper_flush_cache_user(void )
{
unsigned long addr;
for (addr = 0 ; addr < vac_cache_size; addr += vac_line_size)
__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
: /* no outputs */
: "r" (addr), "i" (ASI_M_FLUSH_USER)
: "memory" );
}
static inline void hyper_flush_cache_page(unsigned long page)
{
unsigned long end;
page &= PAGE_MASK;
end = page + PAGE_SIZE;
while (page < end) {
__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
: /* no outputs */
: "r" (page), "i" (ASI_M_FLUSH_PAGE)
: "memory" );
page += vac_line_size;
}
}
#endif /* !(__ASSEMBLY__) */
#endif /* !(_SPARC_ROSS_H) */
Messung V0.5 in Prozent C=97 H=97 G=96
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-09-27)
¤
*© Formatika GbR, Deutschland