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