ross.h
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- /* $Id: ross.h,v 1.13 1998/01/07 06:49:11 baccala Exp $
- * 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 = 128k, 1 = 256k
- * 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 0x00200000
- #define HYPERSPARC_SBENABLE 0x00100000
- #define HYPERSPARC_WBENABLE 0x00080000
- #define HYPERSPARC_MIDMASK 0x00078000
- #define HYPERSPARC_BMODE 0x00004000
- #define HYPERSPARC_ACENABLE 0x00002000
- #define HYPERSPARC_CSIZE 0x00001000
- #define HYPERSPARC_MRFLCT 0x00000800
- #define HYPERSPARC_CMODE 0x00000400
- #define HYPERSPARC_CENABLE 0x00000100
- #define HYPERSPARC_NFAULT 0x00000002
- #define HYPERSPARC_MENABLE 0x00000001
- /* 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
- *
- * 0x 8 3 4 7 c 0 0 0 ! 0x8347c000
- *
- * 1011 1111 1000 0000 0110 0000 0000 0000 ! wr %g1, 0x0, %iccr
- *
- * 0x b f 8 0 6 0 0 0 ! 0xbf806000
- *
- */
- #define HYPERSPARC_ICCR_FTD 0x00000002
- #define HYPERSPARC_ICCR_ICE 0x00000001
- #ifndef __ASSEMBLY__
- extern __inline__ unsigned int get_ross_icr(void)
- {
- unsigned int icreg;
- __asm__ __volatile__(".word 0x8347c000nt" /* rd %iccr, %g1 */
- "mov %%g1, %0nt" :
- "=r" (icreg) : :
- "g1", "memory");
- return icreg;
- }
- extern __inline__ void put_ross_icr(unsigned int icreg)
- {
- __asm__ __volatile__("or %%g0, %0, %%g1nt"
- ".word 0xbf806000nt" /* wr %g1, 0x0, %iccr */
- "nopnt"
- "nopnt"
- "nopnt" : :
- "r" (icreg) :
- "g1", "memory");
- return;
- }
- /* HyperSparc specific cache flushing. */
- /* This is for the on-chip instruction cache. */
- extern __inline__ void hyper_flush_whole_icache(void)
- {
- __asm__ __volatile__("sta %%g0, [%%g0] %0nt" : :
- "i" (ASI_M_FLUSH_IWHOLE));
- return;
- }
- extern int vac_cache_size;
- extern int vac_line_size;
- extern __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] %1nt" : :
- "r" (addr), "i" (ASI_M_DATAC_TAG));
- }
- extern __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] %1nt" : :
- "r" (addr), "i" (ASI_M_FLUSH_CTX));
- }
- extern __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] %1nt" : :
- "r" (addr), "i" (ASI_M_FLUSH_USER));
- }
- extern __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] %1nt" : :
- "r" (page), "i" (ASI_M_FLUSH_PAGE));
- page += vac_line_size;
- }
- }
- #endif /* !(__ASSEMBLY__) */
- #endif /* !(_SPARC_ROSS_H) */