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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When the operand is positive zero, cfnegs and cfnegd write positive zero to the destination register, while the result should be negative zero. It has a different instruction set from other floating point accelerators that are found with ARM processors: D0, D1, E0, E1 and E2.
By using this site, you agree to the Terms of Use and Privacy Policy. The bugs The bugs are: The default is signed.
[linux-cirrus] I’m pretty close with Maverick Crunch on EP – linux-cirrus – FreeLists
Toolchain CMP 1 2 3 4 maveruck 6 7 8 9 10 11 12a 12b 13 14 15 Debian gcc 4. Migrating to Zefeer Embedded Linux Kit 1.

mavrrick When an ARM register is loaded from memory and a double-word cirrus register is immediately stored indirected through the same ARM register, memory is corrupted.
All have a dozen or more hardware bugs which either give imprecise or garbage results or clobber registers or memory when certain sequences of instructions are executed in a certain order.
crosstool-ng for the Maverick Crunch processors
An instruction may be nonexecuted because it is conditional and the condition is false, e. In three places it is used as the first of a two-instruction sequence: Futaris patches futaris patches for gcc It disables all bit integer operations which appear to have more unidentified hardware bugs, as shown by the openssl testsuite.
As you can see in Sec 9. The ARMT core operates from a 1. Single-precision floats live in the top 32 bits of the register and, when they are written, the lower 32 bits are zeroed. Summary of bugs CMP: It appears as co-processors 4, 5 and 6 and its instruction words maveridk hexadecimal match the regular expression 0x. The sign is unaffected. Five revisions of the silicon were issued: It was removed by GCC 4. Discussion specific to it usually happens on the linux-cirrus mailing list.

That illustrates the sort of thing that needs changing to implement unwind support for a new coprocessor. The ep902 consecutive instruction: This page was last edited on 19 Aprilat The solution is to insert some other instruction between the ldr and the bit load or store, such as a nop.
Zefeer Environmental Test Report. The first instruction must be a coprocessor compare instruction, one of cfcmp32cfcmp64cfcmpsand cfcmpd. GCC does not emit conditional Maverick instructions, and the branch case would be covered mavdrick mainline’s -mcirrus-fix-invalid-insns flag if that code were not broken: Designers of industrial controls, internet radios, digital media servers, audio jukeboxes, thin clients, set-top boxes, point-of-sale terminals, biometric security systems and GPS devices will benefit from the EP’s integrated architecture and advanced features.
When the error occurs, the result is either coprocessor register or memory corruption. This error will occur under the following conditions: Views Read Edit View history. When the coprocessor is not in serialized mode and forwarding is enabled, memory can be corrupted when two types of instructions appear in the instruction stream with a particular relative timing. Futaris’ strategy includes disabling all conditional instructions other than branch and all bit integer operations.
crosstool-ng for the Maverick Crunch processors
Enhance your users’ audio experience through Cirrus Logic’s hardware and software solutions: The MMU unit included in the processor core make this modules ideal to run complex and protected operating systems like Linux 2.
This could already be handled mavverick faking a 63 bit truncation and using a splitter to expand those into something like this I only know integer ARM assembly, so I’m making this up: On board RTC specifications.

The unpublished futaris patches for 4. GCC does not emit conditional Maverick instructions.
CIRRUS LOGIC EP9315 – ZEFEER
Execute an instruction that is a data operation not a move between ARM and coprocessor registers whose destination is one of the general purpose register c0 through c Let the immediately following instruction be a two-word ep93302 load or store. The compilers can be downloaded under http: From Wikipedia, the free encyclopedia.
There is a long description of it at http:
