| /* |
| * xtensa/config/core-matmap.h -- Memory access and translation mapping |
| * parameters (CHAL) of the Xtensa processor core configuration. |
| * |
| * If you are using Xtensa Tools, see <xtensa/config/core.h> (which includes |
| * this file) for more details. |
| * |
| * In the Xtensa processor products released to date, all parameters |
| * defined in this file are derivable (at least in theory) from |
| * information contained in the core-isa.h header file. |
| * In particular, the following core configuration parameters are relevant: |
| * XCHAL_HAVE_CACHEATTR |
| * XCHAL_HAVE_MIMIC_CACHEATTR |
| * XCHAL_HAVE_XLT_CACHEATTR |
| * XCHAL_HAVE_PTP_MMU |
| * XCHAL_ITLB_ARF_ENTRIES_LOG2 |
| * XCHAL_DTLB_ARF_ENTRIES_LOG2 |
| * XCHAL_DCACHE_IS_WRITEBACK |
| * XCHAL_ICACHE_SIZE (presence of I-cache) |
| * XCHAL_DCACHE_SIZE (presence of D-cache) |
| * XCHAL_HW_VERSION_MAJOR |
| * XCHAL_HW_VERSION_MINOR |
| */ |
| |
| /* Copyright (c) 1999-2010 Tensilica Inc. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be included |
| in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ |
| |
| |
| #ifndef XTENSA_CONFIG_CORE_MATMAP_H |
| #define XTENSA_CONFIG_CORE_MATMAP_H |
| |
| |
| /*---------------------------------------------------------------------- |
| CACHE (MEMORY ACCESS) ATTRIBUTES |
| ----------------------------------------------------------------------*/ |
| |
| |
| /* Cache Attribute encodings -- lists of access modes for each cache attribute: */ |
| #define XCHAL_FCA_LIST XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_CACHED XCHAL_SEP \ |
| XTHAL_FAM_BYPASS XCHAL_SEP \ |
| XTHAL_FAM_CACHED XCHAL_SEP \ |
| XTHAL_FAM_CACHED XCHAL_SEP \ |
| XTHAL_FAM_CACHED XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_FAM_EXCEPTION |
| #define XCHAL_LCA_LIST XTHAL_LAM_CACHED_NOALLOC XCHAL_SEP \ |
| XTHAL_LAM_CACHED XCHAL_SEP \ |
| XTHAL_LAM_BYPASSG XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_CACHED XCHAL_SEP \ |
| XTHAL_LAM_CACHED XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_LAM_ISOLATE XCHAL_SEP \ |
| XTHAL_LAM_EXCEPTION |
| #define XCHAL_SCA_LIST XTHAL_SAM_WRITETHRU XCHAL_SEP \ |
| XTHAL_SAM_WRITETHRU XCHAL_SEP \ |
| XTHAL_SAM_BYPASS XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_WRITEBACK XCHAL_SEP \ |
| XTHAL_SAM_WRITEBACK_NOALLOC XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION XCHAL_SEP \ |
| XTHAL_SAM_ISOLATE XCHAL_SEP \ |
| XTHAL_SAM_EXCEPTION |
| |
| |
| /* |
| * Specific encoded cache attribute values of general interest. |
| * If a specific cache mode is not available, the closest available |
| * one is returned instead (eg. writethru instead of writeback, |
| * bypass instead of writethru). |
| */ |
| #define XCHAL_CA_BYPASS 2 /* cache disabled (bypassed) mode */ |
| #define XCHAL_CA_WRITETHRU 1 /* cache enabled (write-through) mode */ |
| #define XCHAL_CA_WRITEBACK 4 /* cache enabled (write-back) mode */ |
| #define XCHAL_CA_WRITEBACK_NOALLOC 4 /* cache enabled (write-back no-allocate) mode */ |
| #define XCHAL_CA_ILLEGAL 15 /* no access allowed (all cause exceptions) mode */ |
| #define XCHAL_CA_ISOLATE 14 /* cache isolate (accesses go to cache not memory) mode */ |
| |
| |
| /*---------------------------------------------------------------------- |
| MMU |
| ----------------------------------------------------------------------*/ |
| |
| /* |
| * General notes on MMU parameters. |
| * |
| * Terminology: |
| * ASID = address-space ID (acts as an "extension" of virtual addresses) |
| * VPN = virtual page number |
| * PPN = physical page number |
| * CA = encoded cache attribute (access modes) |
| * TLB = translation look-aside buffer (term is stretched somewhat here) |
| * I = instruction (fetch accesses) |
| * D = data (load and store accesses) |
| * way = each TLB (ITLB and DTLB) consists of a number of "ways" |
| * that simultaneously match the virtual address of an access; |
| * a TLB successfully translates a virtual address if exactly |
| * one way matches the vaddr; if none match, it is a miss; |
| * if multiple match, one gets a "multihit" exception; |
| * each way can be independently configured in terms of number of |
| * entries, page sizes, which fields are writable or constant, etc. |
| * set = group of contiguous ways with exactly identical parameters |
| * ARF = auto-refill; hardware services a 1st-level miss by loading a PTE |
| * from the page table and storing it in one of the auto-refill ways; |
| * if this PTE load also misses, a miss exception is posted for s/w. |
| * min-wired = a "min-wired" way can be used to map a single (minimum-sized) |
| * page arbitrarily under program control; it has a single entry, |
| * is non-auto-refill (some other way(s) must be auto-refill), |
| * all its fields (VPN, PPN, ASID, CA) are all writable, and it |
| * supports the XCHAL_MMU_MIN_PTE_PAGE_SIZE page size (a current |
| * restriction is that this be the only page size it supports). |
| * |
| * TLB way entries are virtually indexed. |
| * TLB ways that support multiple page sizes: |
| * - must have all writable VPN and PPN fields; |
| * - can only use one page size at any given time (eg. setup at startup), |
| * selected by the respective ITLBCFG or DTLBCFG special register, |
| * whose bits n*4+3 .. n*4 index the list of page sizes for way n |
| * (XCHAL_xTLB_SETm_PAGESZ_LOG2_LIST for set m corresponding to way n); |
| * this list may be sparse for auto-refill ways because auto-refill |
| * ways have independent lists of supported page sizes sharing a |
| * common encoding with PTE entries; the encoding is the index into |
| * this list; unsupported sizes for a given way are zero in the list; |
| * selecting unsupported sizes results in undefined hardware behaviour; |
| * - is only possible for ways 0 thru 7 (due to ITLBCFG/DTLBCFG definition). |
| */ |
| |
| #define XCHAL_MMU_ASID_INVALID 0 /* ASID value indicating invalid address space */ |
| #define XCHAL_MMU_ASID_KERNEL 0 /* ASID value indicating kernel (ring 0) address space */ |
| #define XCHAL_MMU_SR_BITS 0 /* number of size-restriction bits supported */ |
| #define XCHAL_MMU_CA_BITS 4 /* number of bits needed to hold cache attribute encoding */ |
| #define XCHAL_MMU_MAX_PTE_PAGE_SIZE 29 /* max page size in a PTE structure (log2) */ |
| #define XCHAL_MMU_MIN_PTE_PAGE_SIZE 29 /* min page size in a PTE structure (log2) */ |
| |
| |
| /*** Instruction TLB: ***/ |
| |
| #define XCHAL_ITLB_WAY_BITS 0 /* number of bits holding the ways */ |
| #define XCHAL_ITLB_WAYS 1 /* number of ways (n-way set-associative TLB) */ |
| #define XCHAL_ITLB_ARF_WAYS 0 /* number of auto-refill ways */ |
| #define XCHAL_ITLB_SETS 1 /* number of sets (groups of ways with identical settings) */ |
| |
| /* Way set to which each way belongs: */ |
| #define XCHAL_ITLB_WAY0_SET 0 |
| |
| /* Ways sets that are used by hardware auto-refill (ARF): */ |
| #define XCHAL_ITLB_ARF_SETS 0 /* number of auto-refill sets */ |
| |
| /* Way sets that are "min-wired" (see terminology comment above): */ |
| #define XCHAL_ITLB_MINWIRED_SETS 0 /* number of "min-wired" sets */ |
| |
| |
| /* ITLB way set 0 (group of ways 0 thru 0): */ |
| #define XCHAL_ITLB_SET0_WAY 0 /* index of first way in this way set */ |
| #define XCHAL_ITLB_SET0_WAYS 1 /* number of (contiguous) ways in this way set */ |
| #define XCHAL_ITLB_SET0_ENTRIES_LOG2 3 /* log2(number of entries in this way) */ |
| #define XCHAL_ITLB_SET0_ENTRIES 8 /* number of entries in this way (always a power of 2) */ |
| #define XCHAL_ITLB_SET0_ARF 0 /* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */ |
| #define XCHAL_ITLB_SET0_PAGESIZES 1 /* number of supported page sizes in this way */ |
| #define XCHAL_ITLB_SET0_PAGESZ_BITS 0 /* number of bits to encode the page size */ |
| #define XCHAL_ITLB_SET0_PAGESZ_LOG2_MIN 29 /* log2(minimum supported page size) */ |
| #define XCHAL_ITLB_SET0_PAGESZ_LOG2_MAX 29 /* log2(maximum supported page size) */ |
| #define XCHAL_ITLB_SET0_PAGESZ_LOG2_LIST 29 /* list of log2(page size)s, separated by XCHAL_SEP; |
| 2^PAGESZ_BITS entries in list, unsupported entries are zero */ |
| #define XCHAL_ITLB_SET0_ASID_CONSTMASK 0 /* constant ASID bits; 0 if all writable */ |
| #define XCHAL_ITLB_SET0_VPN_CONSTMASK 0x00000000 /* constant VPN bits, not including entry index bits; 0 if all writable */ |
| #define XCHAL_ITLB_SET0_PPN_CONSTMASK 0 /* constant PPN bits, including entry index bits; 0 if all writable */ |
| #define XCHAL_ITLB_SET0_CA_CONSTMASK 0 /* constant CA bits; 0 if all writable */ |
| #define XCHAL_ITLB_SET0_ASID_RESET 0 /* 1 if ASID reset values defined (and all writable); 0 otherwise */ |
| #define XCHAL_ITLB_SET0_VPN_RESET 0 /* 1 if VPN reset values defined (and all writable); 0 otherwise */ |
| #define XCHAL_ITLB_SET0_PPN_RESET 1 /* 1 if PPN reset values defined (and all writable); 0 otherwise */ |
| #define XCHAL_ITLB_SET0_CA_RESET 1 /* 1 if CA reset values defined (and all writable); 0 otherwise */ |
| /* Constant VPN values for each entry of ITLB way set 0 (because VPN_CONSTMASK is non-zero): */ |
| #define XCHAL_ITLB_SET0_E0_VPN_CONST 0x00000000 |
| #define XCHAL_ITLB_SET0_E1_VPN_CONST 0x20000000 |
| #define XCHAL_ITLB_SET0_E2_VPN_CONST 0x40000000 |
| #define XCHAL_ITLB_SET0_E3_VPN_CONST 0x60000000 |
| #define XCHAL_ITLB_SET0_E4_VPN_CONST 0x80000000 |
| #define XCHAL_ITLB_SET0_E5_VPN_CONST 0xA0000000 |
| #define XCHAL_ITLB_SET0_E6_VPN_CONST 0xC0000000 |
| #define XCHAL_ITLB_SET0_E7_VPN_CONST 0xE0000000 |
| /* Reset PPN values for each entry of ITLB way set 0 (because SET0_PPN_RESET is non-zero): */ |
| #define XCHAL_ITLB_SET0_E0_PPN_RESET 0x00000000 |
| #define XCHAL_ITLB_SET0_E1_PPN_RESET 0x20000000 |
| #define XCHAL_ITLB_SET0_E2_PPN_RESET 0x40000000 |
| #define XCHAL_ITLB_SET0_E3_PPN_RESET 0x60000000 |
| #define XCHAL_ITLB_SET0_E4_PPN_RESET 0x80000000 |
| #define XCHAL_ITLB_SET0_E5_PPN_RESET 0xA0000000 |
| #define XCHAL_ITLB_SET0_E6_PPN_RESET 0xC0000000 |
| #define XCHAL_ITLB_SET0_E7_PPN_RESET 0xE0000000 |
| /* Reset CA values for each entry of ITLB way set 0 (because SET0_CA_RESET is non-zero): */ |
| #define XCHAL_ITLB_SET0_E0_CA_RESET 0x02 |
| #define XCHAL_ITLB_SET0_E1_CA_RESET 0x02 |
| #define XCHAL_ITLB_SET0_E2_CA_RESET 0x02 |
| #define XCHAL_ITLB_SET0_E3_CA_RESET 0x02 |
| #define XCHAL_ITLB_SET0_E4_CA_RESET 0x02 |
| #define XCHAL_ITLB_SET0_E5_CA_RESET 0x02 |
| #define XCHAL_ITLB_SET0_E6_CA_RESET 0x02 |
| #define XCHAL_ITLB_SET0_E7_CA_RESET 0x02 |
| |
| |
| /*** Data TLB: ***/ |
| |
| #define XCHAL_DTLB_WAY_BITS 0 /* number of bits holding the ways */ |
| #define XCHAL_DTLB_WAYS 1 /* number of ways (n-way set-associative TLB) */ |
| #define XCHAL_DTLB_ARF_WAYS 0 /* number of auto-refill ways */ |
| #define XCHAL_DTLB_SETS 1 /* number of sets (groups of ways with identical settings) */ |
| |
| /* Way set to which each way belongs: */ |
| #define XCHAL_DTLB_WAY0_SET 0 |
| |
| /* Ways sets that are used by hardware auto-refill (ARF): */ |
| #define XCHAL_DTLB_ARF_SETS 0 /* number of auto-refill sets */ |
| |
| /* Way sets that are "min-wired" (see terminology comment above): */ |
| #define XCHAL_DTLB_MINWIRED_SETS 0 /* number of "min-wired" sets */ |
| |
| |
| /* DTLB way set 0 (group of ways 0 thru 0): */ |
| #define XCHAL_DTLB_SET0_WAY 0 /* index of first way in this way set */ |
| #define XCHAL_DTLB_SET0_WAYS 1 /* number of (contiguous) ways in this way set */ |
| #define XCHAL_DTLB_SET0_ENTRIES_LOG2 3 /* log2(number of entries in this way) */ |
| #define XCHAL_DTLB_SET0_ENTRIES 8 /* number of entries in this way (always a power of 2) */ |
| #define XCHAL_DTLB_SET0_ARF 0 /* 1=autorefill by h/w, 0=non-autorefill (wired/constant/static) */ |
| #define XCHAL_DTLB_SET0_PAGESIZES 1 /* number of supported page sizes in this way */ |
| #define XCHAL_DTLB_SET0_PAGESZ_BITS 0 /* number of bits to encode the page size */ |
| #define XCHAL_DTLB_SET0_PAGESZ_LOG2_MIN 29 /* log2(minimum supported page size) */ |
| #define XCHAL_DTLB_SET0_PAGESZ_LOG2_MAX 29 /* log2(maximum supported page size) */ |
| #define XCHAL_DTLB_SET0_PAGESZ_LOG2_LIST 29 /* list of log2(page size)s, separated by XCHAL_SEP; |
| 2^PAGESZ_BITS entries in list, unsupported entries are zero */ |
| #define XCHAL_DTLB_SET0_ASID_CONSTMASK 0 /* constant ASID bits; 0 if all writable */ |
| #define XCHAL_DTLB_SET0_VPN_CONSTMASK 0x00000000 /* constant VPN bits, not including entry index bits; 0 if all writable */ |
| #define XCHAL_DTLB_SET0_PPN_CONSTMASK 0 /* constant PPN bits, including entry index bits; 0 if all writable */ |
| #define XCHAL_DTLB_SET0_CA_CONSTMASK 0 /* constant CA bits; 0 if all writable */ |
| #define XCHAL_DTLB_SET0_ASID_RESET 0 /* 1 if ASID reset values defined (and all writable); 0 otherwise */ |
| #define XCHAL_DTLB_SET0_VPN_RESET 0 /* 1 if VPN reset values defined (and all writable); 0 otherwise */ |
| #define XCHAL_DTLB_SET0_PPN_RESET 1 /* 1 if PPN reset values defined (and all writable); 0 otherwise */ |
| #define XCHAL_DTLB_SET0_CA_RESET 1 /* 1 if CA reset values defined (and all writable); 0 otherwise */ |
| /* Constant VPN values for each entry of DTLB way set 0 (because VPN_CONSTMASK is non-zero): */ |
| #define XCHAL_DTLB_SET0_E0_VPN_CONST 0x00000000 |
| #define XCHAL_DTLB_SET0_E1_VPN_CONST 0x20000000 |
| #define XCHAL_DTLB_SET0_E2_VPN_CONST 0x40000000 |
| #define XCHAL_DTLB_SET0_E3_VPN_CONST 0x60000000 |
| #define XCHAL_DTLB_SET0_E4_VPN_CONST 0x80000000 |
| #define XCHAL_DTLB_SET0_E5_VPN_CONST 0xA0000000 |
| #define XCHAL_DTLB_SET0_E6_VPN_CONST 0xC0000000 |
| #define XCHAL_DTLB_SET0_E7_VPN_CONST 0xE0000000 |
| /* Reset PPN values for each entry of DTLB way set 0 (because SET0_PPN_RESET is non-zero): */ |
| #define XCHAL_DTLB_SET0_E0_PPN_RESET 0x00000000 |
| #define XCHAL_DTLB_SET0_E1_PPN_RESET 0x20000000 |
| #define XCHAL_DTLB_SET0_E2_PPN_RESET 0x40000000 |
| #define XCHAL_DTLB_SET0_E3_PPN_RESET 0x60000000 |
| #define XCHAL_DTLB_SET0_E4_PPN_RESET 0x80000000 |
| #define XCHAL_DTLB_SET0_E5_PPN_RESET 0xA0000000 |
| #define XCHAL_DTLB_SET0_E6_PPN_RESET 0xC0000000 |
| #define XCHAL_DTLB_SET0_E7_PPN_RESET 0xE0000000 |
| /* Reset CA values for each entry of DTLB way set 0 (because SET0_CA_RESET is non-zero): */ |
| #define XCHAL_DTLB_SET0_E0_CA_RESET 0x02 |
| #define XCHAL_DTLB_SET0_E1_CA_RESET 0x02 |
| #define XCHAL_DTLB_SET0_E2_CA_RESET 0x02 |
| #define XCHAL_DTLB_SET0_E3_CA_RESET 0x02 |
| #define XCHAL_DTLB_SET0_E4_CA_RESET 0x02 |
| #define XCHAL_DTLB_SET0_E5_CA_RESET 0x02 |
| #define XCHAL_DTLB_SET0_E6_CA_RESET 0x02 |
| #define XCHAL_DTLB_SET0_E7_CA_RESET 0x02 |
| |
| |
| |
| |
| #endif /*XTENSA_CONFIG_CORE_MATMAP_H*/ |
| |
