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Use the generic UART driver-private data pointer, rather than
embedding the generic UART within the 16550 UART structure.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Remove the assumption that all platforms use a fixed number of 16550
UARTs identifiable by a simple numeric index. Create an abstraction
allowing for dynamic instantiation and registration of any number of
arbitrary UART models.
The common case of the serial console on x86 uses a single fixed UART
specified at compile time. Avoid unnecessarily dragging in the
dynamic instantiation code in this use case by allowing COMCONSOLE to
refer to a single static UART object representing the relevant port.
When selecting a UART by command-line argument (as used in the
"gdbstub serial <port>" command), allow the UART to be specified as
either a numeric index (to retain backwards compatiblity) or a
case-insensitive port name such as "COM2".
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Inline assembly using PHYS_CODE() or REAL_CODE() must use the "R"
constraint rather than the "r" constraint to ensure that the compiler
chooses registers that will be valid for the 32-bit or 16-bit assembly
code fragment.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Remove the intermediate concept of a user pointer from real address
conversion, leaving real_to_virt() as the directly implemented
function.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Remove the intermediate concept of a user pointer from physical
address conversions, leaving virt_to_phys() and phys_to_virt() as the
directly implemented functions.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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The memcpy_user(), memmove_user(), memcmp_user(), memset_user(), and
strlen_user() functions are now just straightforward wrappers around
the corresponding standard library functions.
Remove these redundant wrappers.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Geert Stappers <stappers@stappers.it>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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The "used" attribute can be applied only to functions or variables,
which prevents the use of __asmcall as a type attribute.
Fix by removing "used" from the definition of __asmcall for i386 and
x86_64 architectures, and adding explicit __used annotations where
necessary.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Commit 6149e0a ("[librm] Provide symbols for inline code placed into
other sections") may cause build failures due to duplicate label names
if the compiler chooses to duplicate inline assembly code.
Fix by using the "%=" special format string to include a
guaranteed-unique number within the label name.
The "%=" will be expanded only if constraints exist for the inline
assembly. This fix therefore requires that all REAL_CODE() fragments
use a (possibly empty) constraint list.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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