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2014-12-16target-mips: Add missing calls to synchronise SoftFloat statusMaciej W. Rozycki1-5/+3
Add missing calls to synchronise the SoftFloat status with the CP1.FSCR: + for the rounding and flush-to-zero modes upon processor reset, + for the flush-to-zero mode on FSCR updates through the GDB stub. Refactor code accordingly and remove the redundant RESTORE_ROUNDING_MODE macro. Signed-off-by: Thomas Schwinge <thomas@codesourcery.com> Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16target-mips: gdbstub: Clean up FPU register handlingMaciej W. Rozycki1-19/+19
Rewrite the FPU register access parts of `mips_cpu_gdb_read_register' and `mips_cpu_gdb_write_register' for consistency between each other. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16target-mips: Correct the writes to Status and Cause registers via gdbstubMaciej W. Rozycki1-2/+6
Make writes to CP0.Status and CP0.Cause have the same effect as executing corresponding MTC0 instructions would in Kernel Mode. Also ignore writes in the user emulation mode. Currently for requests from the GDB stub we write all the bits across both registers, ignoring any read-only locations, and do not synchronise the environment to evaluate side effects. We also write these registers in the user emulation mode even though a real kernel presents them as read only. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16target-mips: Make CP1.FIR read-only here tooMaciej W. Rozycki1-1/+1
CP1.FIR is read-only in hardware so gdbstub must respect it. We already respect it for CTC1 instructions, so do it here too. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-12-16target-mips: Correct the handling of register #72 on writesMaciej W. Rozycki1-1/+1
Fix an off-by-one error in `mips_cpu_gdb_write_register' for register matching how `mips_cpu_gdb_read_register' handles it. This register slot is a fake anyway, there's nothing in hardware that corresponds to it. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2014-11-03target-mips: remove duplicated mips/ieee mapping functionYongbok Kim1-7/+0
Remove the duplicated ieee_rm in gdbstub.c. Make the other ieee_rm and ieee_ex_to_mips available to other files. Reviewed-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
2013-07-27cpu: Introduce CPUClass::gdb_{read,write}_register()Andreas Färber1-2/+10
Completes migration of target-specific code to new target-*/gdbstub.c. Acked-by: Michael Walle <michael@walle.cc> (for lm32) Acked-by: Max Filippov <jcmvbkbc@gmail.com> (for xtensa) Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-27gdbstub: Replace GET_REG*() macros with gdb_get_reg*() functionsAndreas Färber1-14/+17
This avoids polluting the global namespace with a non-prefixed macro and makes it obvious in the call sites that we return. Semi-automatic conversion using, e.g., sed -i 's/GET_REGL(/return gdb_get_regl(mem_buf, /g' target-*/gdbstub.c followed by manual tweaking for sparc's GET_REGA() and Coding Style. Acked-by: Michael Walle <michael@walle.cc> (for lm32) Acked-by: Max Filippov <jcmvbkbc@gmail.com> (for xtensa) Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-26target-mips: Move cpu_gdb_{read,write}_register()Andreas Färber1-0/+144
Signed-off-by: Andreas Färber <afaerber@suse.de>
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