[U-Boot] [PATCH v16 9/9] doc/README: documents and readme for NDS32 arch
Macpaul Lin
macpaul at andestech.com
Wed Oct 12 10:33:23 CEST 2011
Documents and READMEs for NDS32 architecture.
It patch also provides usage of SoC AG101 and board ADP-AG101.
Signed-off-by: Macpaul Lin <macpaul at andestech.com>
---
Changes for v1-v10:
- The patch of documentation was not included.
Changes for v11:
- Add the documents of NDS32, ag101, N1213.
Changes for v12-v16:
- No change.
README | 24 ++++++++++++++--
doc/README.N1213 | 55 ++++++++++++++++++++++++++++++++++++
doc/README.NDS32 | 41 +++++++++++++++++++++++++++
doc/README.ag101 | 74 +++++++++++++++++++++++++++++++++++++++++++++++++
doc/README.standalone | 1 +
5 files changed, 192 insertions(+), 3 deletions(-)
create mode 100644 doc/README.N1213
create mode 100644 doc/README.NDS32
create mode 100644 doc/README.ag101
diff --git a/README b/README
index 0868531..2fd7acc 100644
--- a/README
+++ b/README
@@ -182,6 +182,10 @@ Directory Hierarchy:
/cpu CPU specific files
/mips32 Files specific to MIPS32 CPUs
/lib Architecture specific library files
+ /nds32 Files generic to NDS32 architecture
+ /cpu CPU specific files
+ /n1213 Files specific to Andes Technology N1213 CPUs
+ /lib Architecture specific library files
/nios2 Files generic to Altera NIOS2 architecture
/cpu CPU specific files
/lib Architecture specific library files
@@ -3154,7 +3158,7 @@ Low Level (hardware related) configuration options:
globally (CONFIG_CMD_MEM).
- CONFIG_SKIP_LOWLEVEL_INIT
- [ARM, MIPS only] If this variable is defined, then certain
+ [ARM, NDS32, MIPS only] If this variable is defined, then certain
low level initializations (like setting up the memory
controller) are omitted and/or U-Boot does not
relocate itself into RAM.
@@ -3702,8 +3706,8 @@ details; basically, the header defines the following image properties:
Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS,
INTEGRITY).
* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86,
- IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
- Currently supported: ARM, AVR32, Intel x86, MIPS, Nios II, PowerPC).
+ IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
+ Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC).
* Compression Type (uncompressed, gzip, bzip2)
* Load Address
* Entry Point
@@ -4396,6 +4400,20 @@ On Nios II, the ABI is documented here:
Note: on Nios II, we give "-G0" option to gcc and don't use gp
to access small data sections, so gp is free.
+On NDS32, the following registers are used:
+
+ R0-R1: argument/return
+ R2-R5: argument
+ R15: temporary register for assembler
+ R16: trampoline register
+ R28: frame pointer (FP)
+ R29: global pointer (GP)
+ R30: link register (LP)
+ R31: stack pointer (SP)
+ PC: program counter (PC)
+
+ ==> U-Boot will use R10 to hold a pointer to the global data
+
NOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope,
or current versions of GCC may "optimize" the code too much.
diff --git a/doc/README.N1213 b/doc/README.N1213
new file mode 100644
index 0000000..e107166
--- /dev/null
+++ b/doc/README.N1213
@@ -0,0 +1,55 @@
+N1213 is a configurable hard/soft core of NDS32's N12 CPU family.
+
+Features
+========
+
+CPU Core
+ - 16-/32-bit mixable instruction format.
+ - 32 general-purpose 32-bit registers.
+ - 8-stage pipeline.
+ - Dynamic branch prediction.
+ - 32/64/128/256 BTB.
+ - Return address stack (RAS).
+ - Vector interrupts for internal/external.
+ interrupt controller with 6 hardware interrupt signals.
+ - 3 HW-level nested interruptions.
+ - User and super-user mode support.
+ - Memory-mapped I/O.
+ - Address space up to 4GB.
+
+Memory Management Unit
+ - TLB
+ - 4/8-entry fully associative iTLB/dTLB.
+ - 32/64/128-entry 4-way set-associati.ve main TLB.
+ - TLB locking support
+ - Optional hardware page table walker.
+ - Two groups of page size support.
+ - 4KB & 1MB.
+ - 8KB & 1MB.
+
+Memory Subsystem
+ - I & D cache.
+ - Virtually indexed and physically tagged.
+ - Cache size: 8KB/16KB/32KB/64KB.
+ - Cache line size: 16B/32B.
+ - Set associativity: 2-way, 4-way or direct-mapped.
+ - Cache locking support.
+ - I & D local memory (LM).
+ - Size: 4KB to 1MB.
+ - Bank numbers: 1 or 2.
+ - Optional 1D/2D DMA engine.
+ - Internal or external to CPU core.
+
+Bus Interface
+ - Synchronous/Asynchronous AHB bus: 0, 1 or 2 ports.
+ - Synchronous High speed memory port.
+ (HSMP): 0, 1 or 2 ports.
+
+Debug
+ - JTAG debug interface.
+ - Embedded debug module (EDM).
+ - Optional embedded program tracer interface.
+
+Miscellaneous
+ - Programmable data endian control.
+ - Performance monitoring mechanism.
diff --git a/doc/README.NDS32 b/doc/README.NDS32
new file mode 100644
index 0000000..b2b58fc
--- /dev/null
+++ b/doc/README.NDS32
@@ -0,0 +1,41 @@
+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.
diff --git a/doc/README.ag101 b/doc/README.ag101
new file mode 100644
index 0000000..46fc637
--- /dev/null
+++ b/doc/README.ag101
@@ -0,0 +1,74 @@
+Andes Technology SoC AG101
+==========================
+
+AG101 is the first SoC produced by Andes Technology using N1213 CPU core.
+AG101 has integrated both AHB and APB bus and many periphals for application
+and product development.
+
+ADP-AG101
+=========
+
+ADP-AG101 is the SoC with AG101 hardcore CPU.
+
+Please check http://www.andestech.com/p2-4.htm for detail of this SoC.
+
+Configurations
+==============
+
+CONFIG_MEM_REMAP:
+ Doing memory remap is essential for preparing some non-OS or RTOS
+ applications.
+
+ This is also a must on ADP-AG101 board.
+ (While other boards may not have this problem).
+
+ The reason is because the ROM/FLASH circuit on PCB board.
+ AG101-A0 board has 2 jumpers MA17 and SW5 to configure which
+ ROM/FLASH is used to boot.
+
+ When SW5 = "0101", MA17 = LO, the ROM is connected to BANK0,
+ and the FLASH is connected to BANK1.
+ When SW5 = "1010", MA17 = HI, the ROM is disabled (still at BANK0),
+ and the FLASH is connected to BANK0.
+ It will occur problem when doing flash probing if the flash is at
+ BANK0 (0x00000000) while memory remapping was skipped.
+
+ Other board like ADP-AG101P may not enable this since there is only
+ a FLASH connected to bank0.
+
+CONFIG_SKIP_LOWLEVEL_INIT:
+ If you want to boot this system from FLASH and bypass e-bios (the
+ other boot loader on ROM). You should undefine CONFIG_SKIP_LOWLEVEL_INIT
+ in "include/configs/adp-ag101.h".
+
+Build and boot steps
+====================
+
+build:
+1. Prepare the toolchains and make sure the $PATH to toolchains is correct.
+2. Use `make adp-ag101` in u-boot root to build the image.
+
+burn u-boot to flash:
+1. Make sure the MA17 (J16) is Lo.
+2. Make sure the dip switch SW5 is set to "0101".
+3. Power On. Press button "S1", then press button "SW1", then you will found the
+ debug LED show 67 means the system successfully booted into e-bios.
+ Now you can control the e-bios boot loader from your console.
+4. Under "Command>>" prompt, enter "97" (CopyImageFromCard)
+5. Under "Type Dir Name of [CF/SD] =>" promtp, enter "c".
+6. Under "Enter Filename =>" prompt, enter the file name of u-boot image you
+ just build. It is usually "u-boot.bin".
+7. Under "Enter Dest. Address =>" prompt, enter the memory address where you
+ want to put the binary from SD card to RAM.
+ Address "0x500000" is our suggestion.
+8. Under "Command>>" prompt again, enter "55" (CLI) to use interactive command
+ environment.
+9. Under "CLI>" prompt, enter "burn 0x500000 0x80400000 0x30000" to burn the
+ binary from RAM to FLASH.
+10. Under "CLI>" prompt, enter "exit" to finish the burn process.
+
+boot u-boot from flash:
+1. Make sure the MA17 (J16) is Hi).
+2. Make sure the dip switch SW5 is set to "1010".
+3. Power On. Press button "S1", then you will see the debug LED count to 20.
+4. Now you can use u-boot on ADP-AG101 board.
diff --git a/doc/README.standalone b/doc/README.standalone
index 6e6b65f..2be5f27 100644
--- a/doc/README.standalone
+++ b/doc/README.standalone
@@ -56,6 +56,7 @@ Design Notes on Exporting U-Boot Functions to Standalone Applications:
ARM 0x0c100000 0x0c100000
MIPS 0x80200000 0x80200000
Blackfin 0x00001000 0x00001000
+ NDS32 0x00300000 0x00300000
Nios II 0x02000000 0x02000000
For example, the "hello world" application may be loaded and
--
1.7.3.5
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