EP93XX. ARM. ®. 9 Embedded Processor Family. EP93xx. User’s Guide 8×8 Key Mtx. ARMT. Maverick. 18 Bit Raster. LCD I/F. Crunch. Notes on making a proper EABI cross compiler for Maverick Crunch (EP, EP93xx) processors. This is a bit of “higher order hacking” and. It’s already configured to build in /opt/toolchains/ directory. This work is based on patches by Martin Guy and tested both on Cirrus demo board for the EP
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High-Performance, Networked, ARM9, System-on-Chip Processor
The processor must be operating in serialized mode. For example, if a conditional ep9032 two-word load or store appears, ensure that the following instruction is not a coprocessor load or store: For applications with instruction-memory size restrictions, the ARMT’s compressed Thumb instruction set provides space efficiency and maximum external instruction memory usage.
The unpublished futaris patches for 4. The compilers can be downloaded under http: The now rare D0 revision has a more extensive range of hardware bugs than the later revisions; from D1-E2 no further modifications were made to the design of the Maverick unit. This coprocessor greatly accelerates the ARMT’s single- and double-precision integer and floating-point processing capabilities, enabling the EP to perform high-speed maveick calculations when encoding digital audio and video formats, processing industrial-control algorithms and performing other math-intensive computing and data-processing functions.
Block Diagram View Full Image. Evaluation Board Electrical Schematics. Mainline GCC does not emit cfldr32and use of cfmv64lr is disabled as buggy. The 16 KB instruction cache and 16 KB data cache provide zero-cycle latency to the current program and data, or they can be locked to guarantee no-latency access to critical instructions and data.
This article is an orphanas maverifk other articles link to it. maveriick
Orphaned articles from July All orphaned articles. The rich set of peripherals natively implemented by msverick microprocessor allow the module to drive all kind of buses commonly used in the industrial and PC worlds: Execute an instruction that is a two-word coprocessor store either cfstr64 or cfstrdwhere the destination register of the first instruction is the source of the store instruction, that is, the second instruction stores the result of mzverick first one to memory.
Buggy cfadd – cfaddne – mavrick Buggy cfadd – nop – cfaddne – cfstr Buggy cfadd – cfaddne – nop – cfstr OK cfadd – nop – nop – cfaddne – cfstr Buggy cfadd – nop – cfaddne – nop – cfstr Buggy cfadd – cfaddne – nop – nop – cfstr OK cfadd – nop – nop – nop – cfaddne – cfstr OK cfadd – nop – wp9302 – cfaddne – nop – cfstr OK cfadd – nop – cfaddne – nop – nop – cfstr OK cfadd – cfaddne – nop – nop – nop – cfstr Buggy cfadd – cfaddne – cfaddne – cfstr Buggy cfadd – cfaddne – cfaddne – nop – cfstr OK cfadd – cfaddne – cfaddne – nop – nop – cfstr OK cfadd – nop – cfaddne – cfaddne – cfstr OK cfadd – nop maveeick cfaddne – cfaddne – nop – cfstr OK cfadd – nop – cfaddne – cfaddne – nop – magerick – cfstr The second instruction may also not be executed because it follows a branch: Let the immediately following instruction be a two-word coprocessor load or store.
The result is that the lower 32 bits of the result stored to memory will be correct, but the upper the 32 bits will be wrong.
Toolchain CMP 1 2 3 4 5 6 7 8 9 10 11 12a 12b 13 14 15 Debian gcc 4. Retrieved from ” https: Zefeer specific integration guidelines. A test program tickles the bug in both ways on revision E1 silicon. The instructions shift by an unpredictable amount, but cause maverrick other side effects.
crosstool-ng for the Maverick Crunch processors
Thus, to use it efficiently, integer and floating point instructions must be interleaved so as to keep both processors busy. Do not depend on the sign extension to occur; that is, ignore the upper word in any calculations involving data loaded using these instructions.
Disabling the rest would only leave multiply and compare, so we live with the imprecision. Instruction format MaverickCrunch instructions are bit words that are interleaved with the regular ARM instrution stream.
EP | Cirrus Logic
There are three versions of it, all based on gcc It is, if and only if both: The default is non-forwarding. Cirrus Logic’s embedded processor products are complemented by a range of complete operating systems.
For example, assume no pipeline interlocks other than the dependencies involving register c0 in the following instruction sequence: Three developments, described below, will be available with Zefeer CPU boards family: The following is from the EP rev E2 errata: It has eep9302 different instruction set from other floating point accelerators that are found with ARM processors: Execute a third instruction at least one of whose operands is the target of the previous two instructions.
It disables all bit integer operations which appear to have more unidentified hardware bugs, as shown by the openssl testsuite. GCC doesn’t emit conditional Maverick instructions and the jump case should fixed by mainline’s -mfix-cirrus-invalid-instructions.
Audio Clock Generation and Jitter Reduction. The default is asynchronous i. In the maverlck of a load, only the lower 32 bits the first word will be loaded into the target register. Sign is preserved properly, however.