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| author | Vladimir Murzin <murzin.v@gmail.com> | 2012-09-22 15:49:23 +0400 |
|---|---|---|
| committer | Simon Shields <keepcalm444@gmail.com> | 2015-12-09 17:35:26 +1100 |
| commit | cc2317978a88717198b5190124add3cc6e4936d9 (patch) | |
| tree | 4e8b8bc713decbb0a147031e5ae54fc110720e3c /arch/arm/mach-s5p64x0/setup-i2c0.c | |
| parent | 827605e5a9479dc73285f3c40c177ac30e4bffa9 (diff) | |
| download | kernel_samsung_smdk4412-cc2317978a88717198b5190124add3cc6e4936d9.zip kernel_samsung_smdk4412-cc2317978a88717198b5190124add3cc6e4936d9.tar.gz kernel_samsung_smdk4412-cc2317978a88717198b5190124add3cc6e4936d9.tar.bz2 | |
arm: add SDIV/UDIV emulation for ARMv7 processors
The Virtualization Extensions introduce the requirement for an ARMv7-A
implementation to include SDIV and UDIV. Any implementation of the
Virtualization Extensions must include the SDIV and UDIV instructions
in the Thumb and ARM instruction sets.
In an ARMv7-A implementation that does not include the Virtualization
Extensions, it is IMPLEMENTATION DEFINED whether:
* SDIV and UDIV are not implemented
* SDIV and UDIV are implemented only in the Thumb instruction set
* SDIV and UDIV are implemented in the Thumb and ARM instruction sets.
This patch adds a handler to trap and emulate unimplemented SDIV and
UDIV instructions in ARM and Thumb modes. Also some basic statistic is
exported via /proc/cpu/idiv_emulation
Change-Id: I8e721ecac62a05fab42ed7db7951b4c837a59bc7
Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Diffstat (limited to 'arch/arm/mach-s5p64x0/setup-i2c0.c')
0 files changed, 0 insertions, 0 deletions