Comtrol eCos - Manual (Page 350)

Chapter 11. Porting Guide
display "Enable Pentium class CPU features"
default_value 0
description "This component enables support for various
features of Pentium class CPUs."
cdl_option CYGHWR_HAL_I386_PENTIUM_SSE {
display "Save/Restore SSE registers on context switch"
flavor bool
default_value 0
description "
This option enables SSE state switching. The default
behaviour for eCos is to ignore the SSE registers.
Enabling this option adds SSE state information to
every thread context."
}
cdl_option CYGHWR_HAL_I386_PENTIUM_GDB_REGS {
display "Support extra Pentium registers in GDB stub"
flavor bool
default_value 0
description "
This option enables support for extra Pentium registers
in the GDB stub. These are registers such as CR0-CR4, and
all MSRs. Not all GDBs support these registers, so the
default behaviour for eCos is to not include them in the
GDB stub support code."
}
}
In the i386 HALs, the linker script is provided by the architecture HAL. In other HALs, for example MIPS, it is
provided in the variant HAL. The following option provides the name of the linker script to other elements in the
configuration system.
cdl_option CYGBLD_LINKER_SCRIPT {
display "Linker script"
flavor data
no_define
calculated { "src/i386.ld" }
}
Finally, this interface indicates whether the platform supplied an implementation of the
hal_i386_mem_real_region_top() function. If it does then it will contain a line of the form: implements
CYGINT_HAL_I386_MEM_REAL_REGION_TOP . This allows packages such as RedBoot to detect the presence of
this function so that they may call it.
cdl_interface CYGINT_HAL_I386_MEM_REAL_REGION_TOP {
display "Implementations of hal_i386_mem_real_region_top()"
}
}
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