Comtrol eCos - Manual (Page 281)

Chapter 9. HAL Interfaces
This section describes the main HAL interfaces.
Base Definitions
These are definitions that characterize the properties of the base architecture that are used to compile the portable
parts of the kernel. They are concerned with such things a portable type definitions, endianness, and labeling.
These definitions are supplied by the cyg/hal/basetype.h header file which is supplied by the architecture HAL.
It is included automatically by cyg/infra/cyg_type.h .
Byte order
CYG_BYTEORDER
This defines the byte order of the target and must be set to either CYG_LSBFIRST or CYG_MSBFIRST .
Label Translation
CYG_LABEL_NAME(name)
This is a wrapper used in some C and C++ files which use labels defined in assembly code or the linker
script. It need only be defined if the default implementation in cyg/infra/cyg_type.h , which passes the
name argument unaltered, is inadequate. It should be paired with CYG_LABEL_DEFN() .
CYG_LABEL_DEFN(name)
This is a wrapper used in assembler sources and linker scripts which define labels. It need only be defined
if the default implementation in cyg/infra/cyg_type.h , which passes the name argument unaltered, is
inadequate. The most usual alternative definition of this macro prepends an underscore to the label name.
Base types
cyg_halint8
cyg_halint16
cyg_halint32
cyg_halint64
cyg_halcount8
cyg_halcount16
cyg_halcount32
cyg_halcount64
cyg_halbool
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