mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
afc1ce8288
Documents and READMEs for NDS32 architecture. It patch also provides usage of SoC AG101 and board ADP-AG101. Signed-off-by: Macpaul Lin <macpaul@andestech.com>
41 lines
1.6 KiB
Text
41 lines
1.6 KiB
Text
NDS32 is a new high-performance 32-bit RISC microprocessor core.
|
|
|
|
http://www.andestech.com/
|
|
|
|
AndeStar ISA
|
|
============
|
|
AndeStar is a patent-pending 16-bit/32-bit mixed-length instruction set to
|
|
achieve optimal system performance, code density, and power efficiency.
|
|
|
|
It contains the following features:
|
|
- Intermixable 32-bit and 16-bit instruction sets without the need for
|
|
mode switch.
|
|
- 16-bit instructions as a frequently used subset of 32-bit instructions.
|
|
- RISC-style register-based instruction set.
|
|
- 32 32-bit General Purpose Registers (GPR).
|
|
- Upto 1024 User Special Registers (USR) for existing and extension
|
|
instructions.
|
|
- Rich load/store instructions for...
|
|
- Single memory access with base address update.
|
|
- Multiple aligned and unaligned memory accesses for memory copy and stack
|
|
operations.
|
|
- Data prefetch to improve data cache performance.
|
|
- Non-bus locking synchronization instructions.
|
|
- PC relative jump and PC read instructions for efficient position independent
|
|
code.
|
|
- Multiply-add and multiple-sub with 64-bit accumulator.
|
|
- Instruction for efficient power management.
|
|
- Bi-endian support.
|
|
- Three instruction extension space for application acceleration:
|
|
- Performance extension.
|
|
- Andes future extensions (for floating-point, multimedia, etc.)
|
|
- Customer extensions.
|
|
|
|
AndesCore CPU
|
|
=============
|
|
Andes Technology has 4 families of CPU cores: N12, N10, N9, N8.
|
|
|
|
For details about N12 CPU family, please check doc/README.N1213.
|
|
|
|
The NDS32 ports of u-boot, the Linux kernel, the GNU toolchain and
|
|
other associated software are actively supported by Andes Technology Corporation.
|