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target-arm: Add support for generating exceptions with syndrome information

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Add new helpers exception_with_syndrome (for generating an exception
with syndrome information) and exception_uncategorized (for generating
an exception with "Unknown or Uncategorized Reason", which have a syndrome
register value of zero), and use them to generate the correct syndrome
information for exceptions which are raised directly from generated code.

This patch includes moving the A32/T32 gen_exception_insn functions
further up in the source file; they will be needed for "VFP/Neon disabled"
exception generation later.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
This commit is contained in:
Peter Maydell 2014-04-15 19:18:38 +01:00
parent 8bcbf37caa
commit d4a2dc675b
6 changed files with 140 additions and 54 deletions
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14
target-arm/internals.h
View file

@ -25,6 +25,20 @@
#ifndef TARGET_ARM_INTERNALS_H
#define TARGET_ARM_INTERNALS_H
static inline bool excp_is_internal(int excp)
{
/* Return true if this exception number represents a QEMU-internal
* exception that will not be passed to the guest.
*/
return excp == EXCP_INTERRUPT
|| excp == EXCP_HLT
|| excp == EXCP_DEBUG
|| excp == EXCP_HALTED
|| excp == EXCP_EXCEPTION_EXIT
|| excp == EXCP_KERNEL_TRAP
|| excp == EXCP_STREX;
}
/* Scale factor for generic timers, ie number of ns per tick.
* This gives a 62.5MHz timer.
*/