switch (uarch) { case cpuinfo_uarch_cortex_a5: /* * Cortex-A5 Technical Reference Manual: * 6.3.1. Micro TLB * The first level of caching for the page table information is a micro TLB of * 10 entries that is implemented on each of the instruction and data sides. * 6.3.2. Main TLB * Misses from the instruction and data micro TLBs are handled by a unified main TLB. * The main TLB is 128-entry two-way set-associative. */ break; case cpuinfo_uarch_cortex_a7: /* * Cortex-A7 MPCore Technical Reference Manual: * 5.3.1. Micro TLB * The first level of caching for the page table information is a micro TLB of * 10 entries that is implemented on each of the instruction and data sides. * 5.3.2. Main TLB * Misses from the micro TLBs are handled by a unified main TLB. This is a 256-entry 2-way * set-associative structure. The main TLB supports all the VMSAv7 page sizes of * 4KB, 64KB, 1MB and 16MB in addition to the LPAE page sizes of 2MB and 1G. */ break; case cpuinfo_uarch_cortex_a8: /* * Cortex-A8 Technical Reference Manual: * 6.1. About the MMU * The MMU features include the following: * - separate, fully-associative, 32-entry data and instruction TLBs * - TLB entries that support 4KB, 64KB, 1MB, and 16MB pages */ break; case cpuinfo_uarch_cortex_a9: /* * ARM Cortex‑A9 Technical Reference Manual: * 6.2.1 Micro TLB * The first level of caching for the page table information is a micro TLB of 32 entries on the data side, * and configurable 32 or 64 entries on the instruction side. * 6.2.2 Main TLB * The main TLB is implemented as a combination of: * - A fully-associative, lockable array of four elements. * - A 2-way associative structure of 2x32, 2x64, 2x128 or 2x256 entries. */ break; case cpuinfo_uarch_cortex_a15: /* * ARM Cortex-A15 MPCore Processor Technical Reference Manual: * 5.2.1. L1 instruction TLB * The L1 instruction TLB is a 32-entry fully-associative structure. This TLB caches entries at the 4KB * granularity of Virtual Address (VA) to Physical Address (PA) mapping only. If the page tables map the * memory region to a larger granularity than 4K, it only allocates one mapping for the particular 4K region * to which the current access corresponds. * 5.2.2. L1 data TLB * There are two separate 32-entry fully-associative TLBs that are used for data loads and stores, * respectively. Similar to the L1 instruction TLB, both of these cache entries at the 4KB granularity of * VA to PA mappings only. At implementation time, the Cortex-A15 MPCore processor can be configured with * the -l1tlb_1m option, to have the L1 data TLB cache entries at both the 4KB and 1MB granularity. * With this configuration, any translation that results in a 1MB or larger page is cached in the L1 data * TLB as a 1MB entry. Any translation that results in a page smaller than 1MB is cached in the L1 data TLB * as a 4KB entry. By default, all translations are cached in the L1 data TLB as a 4KB entry. * 5.2.3. L2 TLB * Misses from the L1 instruction and data TLBs are handled by a unified L2 TLB. This is a 512-entry 4-way * set-associative structure. The L2 TLB supports all the VMSAv7 page sizes of 4K, 64K, 1MB and 16MB in * addition to the LPAE page sizes of 2MB and 1GB. */ break; case cpuinfo_uarch_cortex_a17: /* * ARM Cortex-A17 MPCore Processor Technical Reference Manual: * 5.2.1. Instruction micro TLB * The instruction micro TLB is implemented as a 32, 48 or 64 entry, fully-associative structure. This TLB * caches entries at the 4KB and 1MB granularity of Virtual Address (VA) to Physical Address (PA) mapping * only. If the translation tables map the memory region to a larger granularity than 4KB or 1MB, it only * allocates one mapping for the particular 4KB region to which the current access corresponds. * 5.2.2. Data micro TLB * The data micro TLB is a 32 entry fully-associative TLB that is used for data loads and stores. The cache * entries have a 4KB and 1MB granularity of VA to PA mappings only. * 5.2.3. Unified main TLB * Misses from the instruction and data micro TLBs are handled by a unified main TLB. This is a 1024 entry * 4-way set-associative structure. The main TLB supports all the VMSAv7 page sizes of 4K, 64K, 1MB and 16MB * in addition to the LPAE page sizes of 2MB and 1GB. */ break; case cpuinfo_uarch_cortex_a35: /* * ARM Cortex‑A35 Processor Technical Reference Manual: * A6.2 TLB Organization * Micro TLB * The first level of caching for the translation table information is a micro TLB of ten entries that * is implemented on each of the instruction and data sides. * Main TLB * A unified main TLB handles misses from the micro TLBs. It has a 512-entry, 2-way, set-associative * structure and supports all VMSAv8 block sizes, except 1GB. If it fetches a 1GB block, the TLB splits * it into 512MB blocks and stores the appropriate block for the lookup. */ break; case cpuinfo_uarch_cortex_a53: /* * ARM Cortex-A53 MPCore Processor Technical Reference Manual: * 5.2.1. Micro TLB * The first level of caching for the translation table information is a micro TLB of ten entries that is * implemented on each of the instruction and data sides. * 5.2.2. Main TLB * A unified main TLB handles misses from the micro TLBs. This is a 512-entry, 4-way, set-associative * structure. The main TLB supports all VMSAv8 block sizes, except 1GB. If a 1GB block is fetched, it is * split into 512MB blocks and the appropriate block for the lookup stored. */ break; case cpuinfo_uarch_cortex_a57: /* * ARM® Cortex-A57 MPCore Processor Technical Reference Manual: * 5.2.1 L1 instruction TLB * The L1 instruction TLB is a 48-entry fully-associative structure. This TLB caches entries of three * different page sizes, natively 4KB, 64KB, and 1MB, of VA to PA mappings. If the page tables map the memory * region to a larger granularity than 1MB, it only allocates one mapping for the particular 1MB region to * which the current access corresponds. * 5.2.2 L1 data TLB * The L1 data TLB is a 32-entry fully-associative TLB that is used for data loads and stores. This TLB * caches entries of three different page sizes, natively 4KB, 64KB, and 1MB, of VA to PA mappings. * 5.2.3 L2 TLB * Misses from the L1 instruction and data TLBs are handled by a unified L2 TLB. This is a 1024-entry 4-way * set-associative structure. The L2 TLB supports the page sizes of 4K, 64K, 1MB and 16MB. It also supports * page sizes of 2MB and 1GB for the long descriptor format translation in AArch32 state and in AArch64 state * when using the 4KB translation granule. In addition, the L2 TLB supports the 512MB page map size defined * for the AArch64 translations that use a 64KB translation granule. */ break; }