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linux/include/asm-xtensa/xtensa/hal.h
Chris Zankel e344b63eee [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 7 
The attached patches provides part 7 of an architecture implementation for the
Tensilica Xtensa CPU series.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-24 00:05:22 -07:00

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#ifndef XTENSA_HAL_H
#define XTENSA_HAL_H
/*
* THIS FILE IS GENERATED -- DO NOT MODIFY BY HAND
*
* include/asm-xtensa/xtensa/hal.h -- contains a definition of the
* Core HAL interface.
*
* All definitions in this header file are independent of any specific
* Xtensa processor configuration. Thus an OS or other software can
* include this header file and be compiled into configuration-
* independent objects that can be distributed and eventually linked
* to the HAL library (libhal.a) to create a configuration-specific
* final executable.
*
* Certain definitions, however, are release-specific -- such as the
* XTHAL_RELEASE_xxx macros (or additions made in later releases).
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2002 Tensilica Inc.
*/
/*----------------------------------------------------------------------
Constant Definitions
(shared with assembly)
----------------------------------------------------------------------*/
/* Software release information (not configuration-specific!): */
#define XTHAL_RELEASE_MAJOR 1050
#define XTHAL_RELEASE_MINOR 0
#define XTHAL_RELEASE_NAME "T1050.0-2002-08-06-eng0"
#define XTHAL_RELEASE_INTERNAL "2002-08-06-eng0"
#define XTHAL_REL_T1050 1
#define XTHAL_REL_T1050_0 1
#define XTHAL_REL_T1050_0_2002 1
#define XTHAL_REL_T1050_0_2002_08 1
#define XTHAL_REL_T1050_0_2002_08_06 1
#define XTHAL_REL_T1050_0_2002_08_06_ENG0 1
/* HAL version numbers (these names are for backward compatibility): */
#define XTHAL_MAJOR_REV XTHAL_RELEASE_MAJOR
#define XTHAL_MINOR_REV XTHAL_RELEASE_MINOR
/*
* A bit of software release history on values of XTHAL_{MAJOR,MINOR}_REV:
*
* Release MAJOR MINOR Comment
* ======= ===== ===== =======
* T1015.n n/a n/a (HAL not yet available)
* T1020.{0,1,2} 0 1 (HAL beta)
* T1020.{3,4} 0 2 First release.
* T1020.n (n>4) 0 2 or >3 (TBD)
* T1030.0 0 1 (HAL beta)
* T1030.{1,2} 0 3 Equivalent to first release.
* T1030.n (n>=3) 0 >= 3 (TBD)
* T1040.n 1040 n Full CHAL available from T1040.2
* T1050.n 1050 n Current release.
*
*
* Note: there is a distinction between the software release with
* which something is compiled (accessible using XTHAL_RELEASE_* macros)
* and the software release with which the HAL library was compiled
* (accessible using Xthal_release_* global variables). This
* distinction is particularly relevant for vendors that distribute
* configuration-independent binaries (eg. an OS), where their customer
* might link it with a HAL of a different Xtensa software release.
* In this case, it may be appropriate for the OS to verify at run-time
* whether XTHAL_RELEASE_* and Xthal_release_* are compatible.
* [Guidelines as to which release is compatible with which are not
* currently provided explicitly, but might be inferred from reading
* OSKit documentation for all releases -- compatibility is also highly
* dependent on which HAL features are used. Each release is usually
* backward compatible, with very few exceptions if any.]
*
* Notes:
* Tornado 2.0 supported in T1020.3+, T1030.1+, and T1040.{0,1} only.
* Tornado 2.0.2 supported in T1040.2+, and T1050.
* Compile-time HAL port of NucleusPlus supported by T1040.2+ and T1050.
*/
/*
* Architectural limits, independent of configuration.
* Note that these are ISA-defined limits, not micro-architecture implementation
* limits enforced by the Xtensa Processor Generator (which may be stricter than
* these below).
*/
#define XTHAL_MAX_CPS 8 /* max number of coprocessors (0..7) */
#define XTHAL_MAX_INTERRUPTS 32 /* max number of interrupts (0..31) */
#define XTHAL_MAX_INTLEVELS 16 /* max number of interrupt levels (0..15) */
/* (as of T1040, implementation limit is 7: 0..6) */
#define XTHAL_MAX_TIMERS 4 /* max number of timers (CCOMPARE0..CCOMPARE3) */
/* (as of T1040, implementation limit is 3: 0..2) */
/* Misc: */
#define XTHAL_LITTLEENDIAN 0
#define XTHAL_BIGENDIAN 1
/* Interrupt types: */
#define XTHAL_INTTYPE_UNCONFIGURED 0
#define XTHAL_INTTYPE_SOFTWARE 1
#define XTHAL_INTTYPE_EXTERN_EDGE 2
#define XTHAL_INTTYPE_EXTERN_LEVEL 3
#define XTHAL_INTTYPE_TIMER 4
#define XTHAL_INTTYPE_NMI 5
#define XTHAL_MAX_INTTYPES 6 /* number of interrupt types */
/* Timer related: */
#define XTHAL_TIMER_UNCONFIGURED -1 /* Xthal_timer_interrupt[] value for non-existent timers */
#define XTHAL_TIMER_UNASSIGNED XTHAL_TIMER_UNCONFIGURED /* (for backwards compatibility only) */
/* Access Mode bits (tentative): */ /* bit abbr unit short_name PPC equ - Description */
#define XTHAL_AMB_EXCEPTION 0 /* 001 E EX fls: EXception none - generate exception on any access (aka "illegal") */
#define XTHAL_AMB_HITCACHE 1 /* 002 C CH fls: use Cache on Hit ~(I CI) - use cache on hit -- way from tag match [or H HC, or U UC] (ISA: same, except for Isolate case) */
#define XTHAL_AMB_ALLOCATE 2 /* 004 A AL fl?: ALlocate none - refill cache on miss -- way from LRU [or F FI fill] (ISA: Read/Write Miss Refill) */
#define XTHAL_AMB_WRITETHRU 3 /* 008 W WT --s: WriteThrough W WT - store immediately to memory (ISA: same) */
#define XTHAL_AMB_ISOLATE 4 /* 010 I IS fls: ISolate none - use cache regardless of hit-vs-miss -- way from vaddr (ISA: use-cache-on-miss+hit) */
#define XTHAL_AMB_GUARD 5 /* 020 G GU ?l?: GUard G * - non-speculative; spec/replay refs not permitted */
#if 0
#define XTHAL_AMB_ORDERED x /* 000 O OR fls: ORdered G * - mem accesses cannot be out of order */
#define XTHAL_AMB_FUSEWRITES x /* 000 F FW --s: FuseWrites none - allow combining/merging multiple writes (to same datapath data unit) into one (implied by writeback) */
#define XTHAL_AMB_COHERENT x /* 000 M MC fl?: Mem/MP Coherent M - on reads, other CPUs/bus-masters may need to supply data */
#define XTHAL_AMB_TRUSTED x /* 000 T TR ?l?: TRusted none - memory will not bus error (if it does, handle as fatal imprecise interrupt) */
#define XTHAL_AMB_PREFETCH x /* 000 P PR fl?: PRefetch none - on refill, read line+1 into prefetch buffers */
#define XTHAL_AMB_STREAM x /* 000 S ST ???: STreaming none - access one of N stream buffers */
#endif /*0*/
#define XTHAL_AM_EXCEPTION (1<<XTHAL_AMB_EXCEPTION)
#define XTHAL_AM_HITCACHE (1<<XTHAL_AMB_HITCACHE)
#define XTHAL_AM_ALLOCATE (1<<XTHAL_AMB_ALLOCATE)
#define XTHAL_AM_WRITETHRU (1<<XTHAL_AMB_WRITETHRU)
#define XTHAL_AM_ISOLATE (1<<XTHAL_AMB_ISOLATE)
#define XTHAL_AM_GUARD (1<<XTHAL_AMB_GUARD)
#if 0
#define XTHAL_AM_ORDERED (1<<XTHAL_AMB_ORDERED)
#define XTHAL_AM_FUSEWRITES (1<<XTHAL_AMB_FUSEWRITES)
#define XTHAL_AM_COHERENT (1<<XTHAL_AMB_COHERENT)
#define XTHAL_AM_TRUSTED (1<<XTHAL_AMB_TRUSTED)
#define XTHAL_AM_PREFETCH (1<<XTHAL_AMB_PREFETCH)
#define XTHAL_AM_STREAM (1<<XTHAL_AMB_STREAM)
#endif /*0*/
/*
* Allowed Access Modes (bit combinations).
*
* Columns are:
* "FOGIWACE"
* Access mode bits (see XTHAL_AMB_xxx above).
* <letter> = bit is set
* '-' = bit is clear
* '.' = bit is irrelevant / don't care, as follows:
* E=1 makes all others irrelevant
* W,F relevant only for stores
* "2345"
* Indicates which Xtensa releases support the corresponding
* access mode. Releases for each character column are:
* 2 = prior to T1020.2: T1015 (V1.5), T1020.0, T1020.1
* 3 = T1020.2 and later: T1020.2+, T1030
* 4 = T1040
* 5 = T1050 (maybe)
* And the character column contents are:
* <number> = support by release(s)
* "." = unsupported by release(s)
* "?" = support unknown
*/
/* FOGIWACE 2345 */
/* For instruction fetch: */
#define XTHAL_FAM_EXCEPTION 0x001 /* .......E 2345 exception */
#define XTHAL_FAM_ISOLATE 0x012 /* .--I.-C- .... isolate */
#define XTHAL_FAM_BYPASS 0x000 /* .---.--- 2345 bypass */
#define XTHAL_FAM_NACACHED 0x002 /* .---.-C- .... cached no-allocate (frozen) */
#define XTHAL_FAM_CACHED 0x006 /* .---.AC- 2345 cached */
/* For data load: */
#define XTHAL_LAM_EXCEPTION 0x001 /* .......E 2345 exception */
#define XTHAL_LAM_ISOLATE 0x012 /* .--I.-C- 2345 isolate */
#define XTHAL_LAM_BYPASS 0x000 /* .O--.--- 2... bypass speculative */
#define XTHAL_LAM_BYPASSG 0x020 /* .OG-.--- .345 bypass guarded */
#define XTHAL_LAM_NACACHED 0x002 /* .O--.-C- 2... cached no-allocate speculative */
#define XTHAL_LAM_NACACHEDG 0x022 /* .OG-.-C- .345 cached no-allocate guarded */
#define XTHAL_LAM_CACHED 0x006 /* .---.AC- 2345 cached speculative */
#define XTHAL_LAM_CACHEDG 0x026 /* .?G-.AC- .... cached guarded */
/* For data store: */
#define XTHAL_SAM_EXCEPTION 0x001 /* .......E 2345 exception */
#define XTHAL_SAM_ISOLATE 0x032 /* .-GI--C- 2345 isolate */
#define XTHAL_SAM_BYPASS 0x028 /* -OG-W--- 2345 bypass */
/*efine XTHAL_SAM_BYPASSF 0x028*/ /* F-G-W--- ...? bypass write-combined */
#define XTHAL_SAM_WRITETHRU 0x02A /* -OG-W-C- 234? writethrough */
/*efine XTHAL_SAM_WRITETHRUF 0x02A*/ /* F-G-W-C- ...5 writethrough write-combined */
#define XTHAL_SAM_WRITEALLOC 0x02E /* -OG-WAC- ...? writethrough-allocate */
/*efine XTHAL_SAM_WRITEALLOCF 0x02E*/ /* F-G-WAC- ...? writethrough-allocate write-combined */
#define XTHAL_SAM_WRITEBACK 0x026 /* F-G--AC- ...5 writeback */
#if 0
/*
Cache attribute encoding for CACHEATTR (per ISA):
(Note: if this differs from ISA Ref Manual, ISA has precedence)
Inst-fetches Loads Stores
------------- ------------ -------------
0x0 FCA_EXCEPTION ?LCA_NACACHED_G* SCA_WRITETHRU "uncached"
0x1 FCA_CACHED LCA_CACHED SCA_WRITETHRU cached
0x2 FCA_BYPASS LCA_BYPASS_G* SCA_BYPASS bypass
0x3 FCA_CACHED LCA_CACHED SCA_WRITEALLOCF write-allocate
or LCA_EXCEPTION SCA_EXCEPTION (if unimplemented)
0x4 FCA_CACHED LCA_CACHED SCA_WRITEBACK write-back
or LCA_EXCEPTION SCA_EXCEPTION (if unimplemented)
0x5..D FCA_EXCEPTION LCA_EXCEPTION SCA_EXCEPTION (reserved)
0xE FCA_EXCEPTION LCA_ISOLATE SCA_ISOLATE isolate
0xF FCA_EXCEPTION LCA_EXCEPTION SCA_EXCEPTION illegal
* Prior to T1020.2?, guard feature not supported, this defaulted to speculative (no _G)
*/
#endif /*0*/
#if !defined(__ASSEMBLY__) && !defined(_NOCLANGUAGE)
#ifdef __cplusplus
extern "C" {
#endif
/*----------------------------------------------------------------------
HAL
----------------------------------------------------------------------*/
/* Constant to be checked in build = (XTHAL_MAJOR_REV<<16)|XTHAL_MINOR_REV */
extern const unsigned int Xthal_rev_no;
/*----------------------------------------------------------------------
Processor State
----------------------------------------------------------------------*/
/* save & restore the extra processor state */
extern void xthal_save_extra(void *base);
extern void xthal_restore_extra(void *base);
extern void xthal_save_cpregs(void *base, int);
extern void xthal_restore_cpregs(void *base, int);
/*extern void xthal_save_all_extra(void *base);*/
/*extern void xthal_restore_all_extra(void *base);*/
/* space for processor state */
extern const unsigned int Xthal_extra_size;
extern const unsigned int Xthal_extra_align;
/* space for TIE register files */
extern const unsigned int Xthal_cpregs_size[XTHAL_MAX_CPS];
extern const unsigned int Xthal_cpregs_align[XTHAL_MAX_CPS];
/* total of space for the processor state (for Tor2) */
extern const unsigned int Xthal_all_extra_size;
extern const unsigned int Xthal_all_extra_align;
/* initialize the extra processor */
/*extern void xthal_init_extra(void);*/
/* initialize the TIE coprocessor */
/*extern void xthal_init_cp(int);*/
/* initialize the extra processor */
extern void xthal_init_mem_extra(void *);
/* initialize the TIE coprocessor */
extern void xthal_init_mem_cp(void *, int);
/* validate & invalidate the TIE register file */
extern void xthal_validate_cp(int);
extern void xthal_invalidate_cp(int);
/* the number of TIE coprocessors contiguous from zero (for Tor2) */
extern const unsigned int Xthal_num_coprocessors;
/* actual number of coprocessors */
extern const unsigned char Xthal_cp_num;
/* index of highest numbered coprocessor, plus one */
extern const unsigned char Xthal_cp_max;
/* index of highest allowed coprocessor number, per cfg, plus one */
/*extern const unsigned char Xthal_cp_maxcfg;*/
/* bitmask of which coprocessors are present */
extern const unsigned int Xthal_cp_mask;
/* read and write cpenable register */
extern void xthal_set_cpenable(unsigned);
extern unsigned xthal_get_cpenable(void);
/* read & write extra state register */
/*extern int xthal_read_extra(void *base, unsigned reg, unsigned *value);*/
/*extern int xthal_write_extra(void *base, unsigned reg, unsigned value);*/
/* read & write a TIE coprocessor register */
/*extern int xthal_read_cpreg(void *base, int cp, unsigned reg, unsigned *value);*/
/*extern int xthal_write_cpreg(void *base, int cp, unsigned reg, unsigned value);*/
/* return coprocessor number based on register */
/*extern int xthal_which_cp(unsigned reg);*/
/*----------------------------------------------------------------------
Interrupts
----------------------------------------------------------------------*/
/* the number of interrupt levels */
extern const unsigned char Xthal_num_intlevels;
/* the number of interrupts */
extern const unsigned char Xthal_num_interrupts;
/* mask for level of interrupts */
extern const unsigned int Xthal_intlevel_mask[XTHAL_MAX_INTLEVELS];
/* mask for level 0 to N interrupts */
extern const unsigned int Xthal_intlevel_andbelow_mask[XTHAL_MAX_INTLEVELS];
/* level of each interrupt */
extern const unsigned char Xthal_intlevel[XTHAL_MAX_INTERRUPTS];
/* type per interrupt */
extern const unsigned char Xthal_inttype[XTHAL_MAX_INTERRUPTS];
/* masks of each type of interrupt */
extern const unsigned int Xthal_inttype_mask[XTHAL_MAX_INTTYPES];
/* interrupt numbers assigned to each timer interrupt */
extern const int Xthal_timer_interrupt[XTHAL_MAX_TIMERS];
/*** Virtual interrupt prioritization: ***/
/* Convert between interrupt levels (as per PS.INTLEVEL) and virtual interrupt priorities: */
extern unsigned xthal_vpri_to_intlevel(unsigned vpri);
extern unsigned xthal_intlevel_to_vpri(unsigned intlevel);
/* Enables/disables given set (mask) of interrupts; returns previous enabled-mask of all ints: */
extern unsigned xthal_int_enable(unsigned);
extern unsigned xthal_int_disable(unsigned);
/* Set/get virtual priority of an interrupt: */
extern int xthal_set_int_vpri(int intnum, int vpri);
extern int xthal_get_int_vpri(int intnum);
/* Set/get interrupt lockout level for exclusive access to virtual priority data structures: */
extern void xthal_set_vpri_locklevel(unsigned intlevel);
extern unsigned xthal_get_vpri_locklevel(void);
/* Set/get current virtual interrupt priority: */
extern unsigned xthal_set_vpri(unsigned vpri);
extern unsigned xthal_get_vpri(unsigned vpri);
extern unsigned xthal_set_vpri_intlevel(unsigned intlevel);
extern unsigned xthal_set_vpri_lock(void);
/*----------------------------------------------------------------------
Generic Interrupt Trampolining Support
----------------------------------------------------------------------*/
typedef void (XtHalVoidFunc)(void);
/*
* Bitmask of interrupts currently trampolining down:
*/
extern unsigned Xthal_tram_pending;
/*
* Bitmask of which interrupts currently trampolining down
* synchronously are actually enabled; this bitmask is necessary
* because INTENABLE cannot hold that state (sync-trampolining
* interrupts must be kept disabled while trampolining);
* in the current implementation, any bit set here is not set
* in INTENABLE, and vice-versa; once a sync-trampoline is
* handled (at level one), its enable bit must be moved from
* here to INTENABLE:
*/
extern unsigned Xthal_tram_enabled;
/*
* Bitmask of interrupts configured for sync trampolining:
*/
extern unsigned Xthal_tram_sync;
/* Trampoline support functions: */
extern unsigned xthal_tram_pending_to_service( void );
extern void xthal_tram_done( unsigned serviced_mask );
extern int xthal_tram_set_sync( int intnum, int sync );
extern XtHalVoidFunc* xthal_set_tram_trigger_func( XtHalVoidFunc *trigger_fn );
/* INTENABLE,INTREAD,INTSET,INTCLEAR register access functions: */
extern unsigned xthal_get_intenable( void );
extern void xthal_set_intenable( unsigned );
extern unsigned xthal_get_intread( void );
extern void xthal_set_intset( unsigned );
extern void xthal_set_intclear( unsigned );
/*----------------------------------------------------------------------
Register Windows
----------------------------------------------------------------------*/
/* number of registers in register window */
extern const unsigned int Xthal_num_aregs;
extern const unsigned char Xthal_num_aregs_log2;
/* This spill any live register windows (other than the caller's): */
extern void xthal_window_spill( void );
/*----------------------------------------------------------------------
Cache
----------------------------------------------------------------------*/
/* size of the cache lines in log2(bytes) */
extern const unsigned char Xthal_icache_linewidth;
extern const unsigned char Xthal_dcache_linewidth;
/* size of the cache lines in bytes */
extern const unsigned short Xthal_icache_linesize;
extern const unsigned short Xthal_dcache_linesize;
/* number of cache sets in log2(lines per way) */
extern const unsigned char Xthal_icache_setwidth;
extern const unsigned char Xthal_dcache_setwidth;
/* cache set associativity (number of ways) */
extern const unsigned int Xthal_icache_ways;
extern const unsigned int Xthal_dcache_ways;
/* size of the caches in bytes (ways * 2^(linewidth + setwidth)) */
extern const unsigned int Xthal_icache_size;
extern const unsigned int Xthal_dcache_size;
/* cache features */
extern const unsigned char Xthal_dcache_is_writeback;
extern const unsigned char Xthal_icache_line_lockable;
extern const unsigned char Xthal_dcache_line_lockable;
/* cache attribute register control (used by other HAL routines) */
extern unsigned xthal_get_cacheattr( void );
extern unsigned xthal_get_icacheattr( void );
extern unsigned xthal_get_dcacheattr( void );
extern void xthal_set_cacheattr( unsigned );
extern void xthal_set_icacheattr( unsigned );
extern void xthal_set_dcacheattr( unsigned );
/* initialize cache support (must be called once at startup, before all other cache calls) */
/*extern void xthal_cache_startinit( void );*/
/* reset caches */
/*extern void xthal_icache_reset( void );*/
/*extern void xthal_dcache_reset( void );*/
/* enable caches */
extern void xthal_icache_enable( void ); /* DEPRECATED */
extern void xthal_dcache_enable( void ); /* DEPRECATED */
/* disable caches */
extern void xthal_icache_disable( void ); /* DEPRECATED */
extern void xthal_dcache_disable( void ); /* DEPRECATED */
/* invalidate the caches */
extern void xthal_icache_all_invalidate( void );
extern void xthal_dcache_all_invalidate( void );
extern void xthal_icache_region_invalidate( void *addr, unsigned size );
extern void xthal_dcache_region_invalidate( void *addr, unsigned size );
extern void xthal_icache_line_invalidate(void *addr);
extern void xthal_dcache_line_invalidate(void *addr);
/* write dirty data back */
extern void xthal_dcache_all_writeback( void );
extern void xthal_dcache_region_writeback( void *addr, unsigned size );
extern void xthal_dcache_line_writeback(void *addr);
/* write dirty data back and invalidate */
extern void xthal_dcache_all_writeback_inv( void );
extern void xthal_dcache_region_writeback_inv( void *addr, unsigned size );
extern void xthal_dcache_line_writeback_inv(void *addr);
/* prefetch and lock specified memory range into cache */
extern void xthal_icache_region_lock( void *addr, unsigned size );
extern void xthal_dcache_region_lock( void *addr, unsigned size );
extern void xthal_icache_line_lock(void *addr);
extern void xthal_dcache_line_lock(void *addr);
/* unlock from cache */
extern void xthal_icache_all_unlock( void );
extern void xthal_dcache_all_unlock( void );
extern void xthal_icache_region_unlock( void *addr, unsigned size );
extern void xthal_dcache_region_unlock( void *addr, unsigned size );
extern void xthal_icache_line_unlock(void *addr);
extern void xthal_dcache_line_unlock(void *addr);
/* sync icache and memory */
extern void xthal_icache_sync( void );
/* sync dcache and memory */
extern void xthal_dcache_sync( void );
/*----------------------------------------------------------------------
Debug
----------------------------------------------------------------------*/
/* 1 if debug option configured, 0 if not: */
extern const int Xthal_debug_configured;
/* Number of instruction and data break registers: */
extern const int Xthal_num_ibreak;
extern const int Xthal_num_dbreak;
/* Set (plant) and remove software breakpoint, both synchronizing cache: */
extern unsigned int xthal_set_soft_break(void *addr);
extern void xthal_remove_soft_break(void *addr, unsigned int);
/*----------------------------------------------------------------------
Disassembler
----------------------------------------------------------------------*/
/* Max expected size of the return buffer for a disassembled instruction (hint only): */
#define XTHAL_DISASM_BUFSIZE 80
/* Disassembly option bits for selecting what to return: */
#define XTHAL_DISASM_OPT_ADDR 0x0001 /* display address */
#define XTHAL_DISASM_OPT_OPHEX 0x0002 /* display opcode bytes in hex */
#define XTHAL_DISASM_OPT_OPCODE 0x0004 /* display opcode name (mnemonic) */
#define XTHAL_DISASM_OPT_PARMS 0x0008 /* display parameters */
#define XTHAL_DISASM_OPT_ALL 0x0FFF /* display everything */
/* routine to get a string for the disassembled instruction */
extern int xthal_disassemble( unsigned char *instr_buf, void *tgt_addr,
char *buffer, unsigned buflen, unsigned options );
/* routine to get the size of the next instruction. Returns 0 for
illegal instruction */
extern int xthal_disassemble_size( unsigned char *instr_buf );
/*----------------------------------------------------------------------
Core Counter
----------------------------------------------------------------------*/
/* counter info */
extern const unsigned char Xthal_have_ccount; /* set if CCOUNT register present */
extern const unsigned char Xthal_num_ccompare; /* number of CCOMPAREn registers */
/* get CCOUNT register (if not present return 0) */
extern unsigned xthal_get_ccount(void);
/* set and get CCOMPAREn registers (if not present, get returns 0) */
extern void xthal_set_ccompare(int, unsigned);
extern unsigned xthal_get_ccompare(int);
/*----------------------------------------------------------------------
Instruction/Data RAM/ROM Access
----------------------------------------------------------------------*/
extern void* xthal_memcpy(void *dst, const void *src, unsigned len);
extern void* xthal_bcopy(const void *src, void *dst, unsigned len);
/*----------------------------------------------------------------------
MP Synchronization
----------------------------------------------------------------------*/
extern int xthal_compare_and_set( int *addr, int test_val, int compare_val );
extern unsigned xthal_get_prid( void );
/*extern const char Xthal_have_s32c1i;*/
extern const unsigned char Xthal_have_prid;
/*----------------------------------------------------------------------
Miscellaneous
----------------------------------------------------------------------*/
extern const unsigned int Xthal_release_major;
extern const unsigned int Xthal_release_minor;
extern const char * const Xthal_release_name;
extern const char * const Xthal_release_internal;
extern const unsigned char Xthal_memory_order;
extern const unsigned char Xthal_have_windowed;
extern const unsigned char Xthal_have_density;
extern const unsigned char Xthal_have_booleans;
extern const unsigned char Xthal_have_loops;
extern const unsigned char Xthal_have_nsa;
extern const unsigned char Xthal_have_minmax;
extern const unsigned char Xthal_have_sext;
extern const unsigned char Xthal_have_clamps;
extern const unsigned char Xthal_have_mac16;
extern const unsigned char Xthal_have_mul16;
extern const unsigned char Xthal_have_fp;
extern const unsigned char Xthal_have_speculation;
extern const unsigned char Xthal_have_exceptions;
extern const unsigned char Xthal_xea_version;
extern const unsigned char Xthal_have_interrupts;
extern const unsigned char Xthal_have_highlevel_interrupts;
extern const unsigned char Xthal_have_nmi;
extern const unsigned short Xthal_num_writebuffer_entries;
extern const unsigned int Xthal_build_unique_id;
/* Release info for hardware targeted by software upgrades: */
extern const unsigned int Xthal_hw_configid0;
extern const unsigned int Xthal_hw_configid1;
extern const unsigned int Xthal_hw_release_major;
extern const unsigned int Xthal_hw_release_minor;
extern const char * const Xthal_hw_release_name;
extern const char * const Xthal_hw_release_internal;
/* Internal memories... */
extern const unsigned char Xthal_num_instrom;
extern const unsigned char Xthal_num_instram;
extern const unsigned char Xthal_num_datarom;
extern const unsigned char Xthal_num_dataram;
extern const unsigned char Xthal_num_xlmi;
extern const unsigned int Xthal_instrom_vaddr[1];
extern const unsigned int Xthal_instrom_paddr[1];
extern const unsigned int Xthal_instrom_size [1];
extern const unsigned int Xthal_instram_vaddr[1];
extern const unsigned int Xthal_instram_paddr[1];
extern const unsigned int Xthal_instram_size [1];
extern const unsigned int Xthal_datarom_vaddr[1];
extern const unsigned int Xthal_datarom_paddr[1];
extern const unsigned int Xthal_datarom_size [1];
extern const unsigned int Xthal_dataram_vaddr[1];
extern const unsigned int Xthal_dataram_paddr[1];
extern const unsigned int Xthal_dataram_size [1];
extern const unsigned int Xthal_xlmi_vaddr[1];
extern const unsigned int Xthal_xlmi_paddr[1];
extern const unsigned int Xthal_xlmi_size [1];
/*----------------------------------------------------------------------
Memory Management Unit
----------------------------------------------------------------------*/
extern const unsigned char Xthal_have_spanning_way;
extern const unsigned char Xthal_have_identity_map;
extern const unsigned char Xthal_have_mimic_cacheattr;
extern const unsigned char Xthal_have_xlt_cacheattr;
extern const unsigned char Xthal_have_cacheattr;
extern const unsigned char Xthal_have_tlbs;
extern const unsigned char Xthal_mmu_asid_bits; /* 0 .. 8 */
extern const unsigned char Xthal_mmu_asid_kernel;
extern const unsigned char Xthal_mmu_rings; /* 1 .. 4 (perhaps 0 if no MMU and/or no protection?) */
extern const unsigned char Xthal_mmu_ring_bits;
extern const unsigned char Xthal_mmu_sr_bits;
extern const unsigned char Xthal_mmu_ca_bits;
extern const unsigned int Xthal_mmu_max_pte_page_size;
extern const unsigned int Xthal_mmu_min_pte_page_size;
extern const unsigned char Xthal_itlb_way_bits;
extern const unsigned char Xthal_itlb_ways;
extern const unsigned char Xthal_itlb_arf_ways;
extern const unsigned char Xthal_dtlb_way_bits;
extern const unsigned char Xthal_dtlb_ways;
extern const unsigned char Xthal_dtlb_arf_ways;
/* Convert between virtual and physical addresses (through static maps only): */
/*** WARNING: these two functions may go away in a future release; don't depend on them! ***/
extern int xthal_static_v2p( unsigned vaddr, unsigned *paddrp );
extern int xthal_static_p2v( unsigned paddr, unsigned *vaddrp, unsigned cached );
#if 0
/******************* EXPERIMENTAL AND TENTATIVE ONLY ********************/
#define XTHAL_MMU_PAGESZ_COUNT_MAX 8 /* maximum number of different page sizes */
extern const char Xthal_mmu_pagesz_count; /* 0 .. 8 number of different page sizes configured */
/* Note: the following table doesn't necessarily have page sizes in increasing order: */
extern const char Xthal_mmu_pagesz_log2[XTHAL_MMU_PAGESZ_COUNT_MAX]; /* 10 .. 28 (0 past count) */
/* Sorted (increasing) table of page sizes, that indexes into the above table: */
extern const char Xthal_mmu_pagesz_sorted[XTHAL_MMU_PAGESZ_COUNT_MAX]; /* 0 .. 7 (0 past count) */
/*u32 Xthal_virtual_exceptions;*/ /* bitmask of which exceptions execute in virtual mode... */
extern const char Xthal_mmu_pte_pagesz_log2_min; /* ?? minimum page size in PTEs */
extern const char Xthal_mmu_pte_pagesz_log2_max; /* ?? maximum page size in PTEs */
/* Cache Attribute Bits Implemented by the Cache (part of the cache abstraction) */
extern const char Xthal_icache_fca_bits_implemented; /* ITLB/UTLB only! */
extern const char Xthal_dcache_lca_bits_implemented; /* DTLB/UTLB only! */
extern const char Xthal_dcache_sca_bits_implemented; /* DTLB/UTLB only! */
/* Per TLB Parameters (Instruction, Data, Unified) */
struct XtHalMmuTlb Xthal_itlb; /* description of MMU I-TLB generic features */
struct XtHalMmuTlb Xthal_dtlb; /* description of MMU D-TLB generic features */
struct XtHalMmuTlb Xthal_utlb; /* description of MMU U-TLB generic features */
#define XTHAL_MMU_WAYS_MAX 8 /* maximum number of ways (associativities) for each TLB */
/* Structure for common information described for each possible TLB (instruction, data and unified): */
typedef struct XtHalMmuTlb {
u8 va_bits; /* 32 (number of virtual address bits) */
u8 pa_bits; /* 32 (number of physical address bits) */
bool tlb_va_indexed; /* 1 (set if TLB is indexed by virtual address) */
bool tlb_va_tagged; /* 0 (set if TLB is tagged by virtual address) */
bool cache_va_indexed; /* 1 (set if cache is indexed by virtual address) */
bool cache_va_tagged; /* 0 (set if cache is tagged by virtual address) */
/*bool (whether page tables are traversed in vaddr sorted order, paddr sorted order, ...) */
/*u8 (set of available page attribute bits, other than cache attribute bits defined above) */
/*u32 (various masks for pages, MMU table/TLB entries, etc.) */
u8 way_count; /* 0 .. 8 (number of ways, a.k.a. associativities, for this TLB) */
XtHalMmuTlbWay * ways[XTHAL_MMU_WAYS_MAX]; /* pointers to per-way parms for each way */
} XtHalMmuTlb;
/* Per TLB Way (Per Associativity) Parameters */
typedef struct XtHalMmuTlbWay {
u32 index_count_log2; /* 0 .. 4 */
u32 pagesz_mask; /* 0 .. 2^pagesz_count - 1 (each bit corresponds to a size */
/* defined in the Xthal_mmu_pagesz_log2[] table) */
u32 vpn_const_mask;
u32 vpn_const_value;
u64 ppn_const_mask; /* future may support pa_bits > 32 */
u64 ppn_const_value;
u32 ppn_id_mask; /* paddr bits taken directly from vaddr */
bool backgnd_match; /* 0 or 1 */
/* These are defined in terms of the XTHAL_CACHE_xxx bits: */
u8 fca_const_mask; /* ITLB/UTLB only! */
u8 fca_const_value; /* ITLB/UTLB only! */
u8 lca_const_mask; /* DTLB/UTLB only! */
u8 lca_const_value; /* DTLB/UTLB only! */
u8 sca_const_mask; /* DTLB/UTLB only! */
u8 sca_const_value; /* DTLB/UTLB only! */
/* These define an encoding that map 5 bits in TLB and PTE entries to */
/* 8 bits (FCA, ITLB), 16 bits (LCA+SCA, DTLB) or 24 bits (FCA+LCA+SCA, UTLB): */
/* (they may be moved to struct XtHalMmuTlb) */
u8 ca_bits; /* number of bits in TLB/PTE entries for cache attributes */
u32 * ca_map; /* pointer to array of 2^ca_bits entries of FCA+LCA+SCA bits */
} XtHalMmuTlbWay;
/*
* The way to determine whether protection support is present in core
* is to [look at Xthal_mmu_rings ???].
* Give info on memory requirements for MMU tables and other in-memory
* data structures (globally, per task, base and per page, etc.) - whatever bounds can be calculated.
*/
/* Default vectors: */
xthal_immu_fetch_miss_vector
xthal_dmmu_load_miss_vector
xthal_dmmu_store_miss_vector
/* Functions called when a fault is detected: */
typedef void (XtHalMmuFaultFunc)( unsigned vaddr, ...context... );
/* Or, */
/* a? = vaddr */
/* a? = context... */
/* PS.xxx = xxx */
XtHalMMuFaultFunc *Xthal_immu_fetch_fault_func;
XtHalMMuFaultFunc *Xthal_dmmu_load_fault_func;
XtHalMMuFaultFunc *Xthal_dmmu_store_fault_func;
/* Default Handlers: */
/* The user and/or kernel exception handlers may jump to these handlers to handle the relevant exceptions,
* according to the value of EXCCAUSE. The exact register state on entry to these handlers is TBD. */
/* When multiple TLB entries match (hit) on the same access: */
xthal_immu_fetch_multihit_handler
xthal_dmmu_load_multihit_handler
xthal_dmmu_store_multihit_handler
/* Protection violations according to cache attributes, and other cache attribute mismatches: */
xthal_immu_fetch_attr_handler
xthal_dmmu_load_attr_handler
xthal_dmmu_store_attr_handler
/* Protection violations due to insufficient ring level: */
xthal_immu_fetch_priv_handler
xthal_dmmu_load_priv_handler
xthal_dmmu_store_priv_handler
/* Alignment exception handlers (if supported by the particular Xtensa MMU configuration): */
xthal_dmmu_load_align_handler
xthal_dmmu_store_align_handler
/* Or, alternatively, the OS user and/or kernel exception handlers may simply jump to the
* following entry points which will handle any values of EXCCAUSE not handled by the OS: */
xthal_user_exc_default_handler
xthal_kernel_exc_default_handler
#endif /*0*/
#ifdef INCLUDE_DEPRECATED_HAL_CODE
extern const unsigned char Xthal_have_old_exc_arch;
extern const unsigned char Xthal_have_mmu;
extern const unsigned int Xthal_num_regs;
extern const unsigned char Xthal_num_iroms;
extern const unsigned char Xthal_num_irams;
extern const unsigned char Xthal_num_droms;
extern const unsigned char Xthal_num_drams;
extern const unsigned int Xthal_configid0;
extern const unsigned int Xthal_configid1;
#endif
#ifdef INCLUDE_DEPRECATED_HAL_DEBUG_CODE
#define XTHAL_24_BIT_BREAK 0x80000000
#define XTHAL_16_BIT_BREAK 0x40000000
extern const unsigned short Xthal_ill_inst_16[16];
#define XTHAL_DEST_REG 0xf0000000 /* Mask for destination register */
#define XTHAL_DEST_REG_INST 0x08000000 /* Branch address is in register */
#define XTHAL_DEST_REL_INST 0x04000000 /* Branch address is relative */
#define XTHAL_RFW_INST 0x00000800
#define XTHAL_RFUE_INST 0x00000400
#define XTHAL_RFI_INST 0x00000200
#define XTHAL_RFE_INST 0x00000100
#define XTHAL_RET_INST 0x00000080
#define XTHAL_BREAK_INST 0x00000040
#define XTHAL_SYSCALL_INST 0x00000020
#define XTHAL_LOOP_END 0x00000010 /* Not set by xthal_inst_type */
#define XTHAL_JUMP_INST 0x00000008 /* Call or jump instruction */
#define XTHAL_BRANCH_INST 0x00000004 /* Branch instruction */
#define XTHAL_24_BIT_INST 0x00000002
#define XTHAL_16_BIT_INST 0x00000001
typedef struct xthal_state {
unsigned pc;
unsigned ar[16];
unsigned lbeg;
unsigned lend;
unsigned lcount;
unsigned extra_ptr;
unsigned cpregs_ptr[XTHAL_MAX_CPS];
} XTHAL_STATE;
extern unsigned int xthal_inst_type(void *addr);
extern unsigned int xthal_branch_addr(void *addr);
extern unsigned int xthal_get_npc(XTHAL_STATE *user_state);
#endif /* INCLUDE_DEPRECATED_HAL_DEBUG_CODE */
#ifdef __cplusplus
}
#endif
#endif /*!__ASSEMBLY__ */
#endif /*XTENSA_HAL_H*/
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