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@@ -183,6 +183,10 @@ Directory Hierarchy:
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/mips32 Files specific to MIPS32 CPUs
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/xburst Files specific to Ingenic XBurst CPUs
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/lib Architecture specific library files
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+ /nds32 Files generic to NDS32 architecture
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+ /cpu CPU specific files
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+ /n1213 Files specific to Andes Technology N1213 CPUs
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+ /lib Architecture specific library files
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/nios2 Files generic to Altera NIOS2 architecture
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/cpu CPU specific files
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/lib Architecture specific library files
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@@ -3156,7 +3160,7 @@ Low Level (hardware related) configuration options:
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globally (CONFIG_CMD_MEM).
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- CONFIG_SKIP_LOWLEVEL_INIT
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- [ARM, MIPS only] If this variable is defined, then certain
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+ [ARM, NDS32, MIPS only] If this variable is defined, then certain
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low level initializations (like setting up the memory
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controller) are omitted and/or U-Boot does not
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relocate itself into RAM.
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@@ -3723,8 +3727,8 @@ details; basically, the header defines the following image properties:
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Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS,
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INTEGRITY).
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* Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86,
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- IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
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- Currently supported: ARM, AVR32, Intel x86, MIPS, Nios II, PowerPC).
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+ IA64, MIPS, NDS32, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
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+ Currently supported: ARM, AVR32, Intel x86, MIPS, NDS32, Nios II, PowerPC).
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* Compression Type (uncompressed, gzip, bzip2)
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* Load Address
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* Entry Point
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@@ -4417,6 +4421,20 @@ On Nios II, the ABI is documented here:
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Note: on Nios II, we give "-G0" option to gcc and don't use gp
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to access small data sections, so gp is free.
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+On NDS32, the following registers are used:
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+
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+ R0-R1: argument/return
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+ R2-R5: argument
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+ R15: temporary register for assembler
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+ R16: trampoline register
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+ R28: frame pointer (FP)
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+ R29: global pointer (GP)
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+ R30: link register (LP)
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+ R31: stack pointer (SP)
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+ PC: program counter (PC)
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+
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+ ==> U-Boot will use R10 to hold a pointer to the global data
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+
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NOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope,
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or current versions of GCC may "optimize" the code too much.
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