TEMU 3.0.4

TEMU 3.0.4

TEMU 3.0.4 addresses two issues related to IRQ remapping on the GR740

• Enable GR740 IRQ remapping in the GR740 configuration file
• Fix an issue where the IRQ remapping would be applied too late in the interrupt chain

In addition the following features have been added:

• ABI level stacktrace command in the SPARC processor models. To run this, enter cpu0.stacktrace in the command line interface.

TEMU 3.0.3

TEMU 3.0.3 addresses the following bugs:

• Adding AHB2AHB model for the GR740 (it only provides PNP data)
• Adding two extra AHBCTRL devices in the GR740 (memory- and AHB slave I/O buses)
• Adding AHB PNP interfaces for GRIOMMU (master AHB, secondary master AHB and slave AHBinterfaces).
• Aligning default capability register values in GRIOMMU with values from GR740 hardware. Documented values were incorrect.
• The experimental namespace for the SoC ID and version properties in the AhbCtrl added in TEMU 3.0.2 has been dropped. Properties should now be named without the experimental tag.

TEMU 3.0.2

TEMU 3.0.2 has been released it addresses the following issues:

• Fix sometimes incorrect determination of on/off page jumps in the binary translator.
• Fix invalid jump instructions in binary translated code, that could happen if the offset was more than 2 GiB.
• PikeOS would not boot in TEMU, resolving this by:
  • Fix device version in AMBA PNP data LEON4 processor core.
  • Adding GRGPREG model. This model is a dummy, but provides the correct PNP info and user configurable registers.
  • Adding GRGPRBANK model. This model is a dummy, but provides the correct PNP info and user configurable registers.
  • Adding a workaround in AhbCtrl model to expose undocumented SoC ID and version IDs.

TEMU 3.0.2 also adds the following enhancements:

• Adding built-in ExecutionProfiler model that can monitor performance metrics over time.
• Adding built-in Sampler model that can sample arbitrary properties over time.
• Adding built-in ScriptSequencer model that can sequence TEMU scripts on specific times.

TEMU 3.0.1

TEMU 3.0.1 has been released, it addresses the following issues:

• Bug: Invalid x86-64 instruction generated in translator, possibly leading to stack corruption.
• Bug: Move translator caches to memory-subsystem so they are shared on-multi-processor systems.
• Enhancement: Increase ATC sizes on SPARC targets from 16 to 512 entries. This significantly increases ATC hit ratio.

TEMU 3.0.0

TEMU 3.0.0 has now been released. TEMU 3.0.0 is a major milestone in the TEMU product evolution.

The major focus for TEMU 3 has been on the performance and we add two major changes to system to increase performance.

The first change is the introduction of a pre-decoded dispatch interpreter, which converts target architecture instructions to an internal intermediate representation format. TEMU 2 used to fetch and decode instructions every time they were executed, but with TEMU 3 we only decode them once. This speeds up the interpreter by around 50% in measurements we have performed.

The second change for performance is the introduction of a dynamic binary translator engine. This engine can yield an additional 100% performance increase (exact numbers depend on the software running, and they can be higher or lower).

TEMU 3 also introduce the ability to define custom idle patterns, which although the API is currently unstable, could be used to define custom idle loop matchers (e.g. memory scrubbers etc). This is possible since the interpreter (and binary translator) decodes blocks of instructions now.

TEMU 3 also switch to semantic versioning for this and future releases, and although TEMU 2 almost use this system, it was not formally semver compliant. This will add clarity to the question of API and ABI stability and the compatibility of different versions.

New Models

• System Configurations
  • GR740
• Bus Models
  • SPI
  • PCIe
• GRLIB
  • IRQAMP
• PowerPC
  • e500 PowerPC core (including SPE instruction set)
  • P2020 peripherals
    • GPIO
    • eSPI
    • PCIe
    • eTSEC Ethernet MAC
    • DUART
    • PIC
    • DDR controller
    • Coherency module

Removals

• Legacy event API has been removed, this was deprecated in TEMU 2.2
• External class support has been removed, the solution is to write wrapper models using pseudo properties.