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MIPS: unaligned: Add DSP lwx & lhx missaligned access support

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Add handling of missaligned access for DSP load instructions
lwx & lhx.

Since DSP instructions share SPECIAL3 opcode with other non-DSP
instructions, necessary logic was inserted for distinguishing
between instructions with SPECIAL3 opcode. For that purpose,
the instruction format for DSP instructions is added to
arch/mips/include/uapi/asm/inst.h.

Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtech.com>
Cc: James.Hogan@imgtec.com
Cc: Paul.Burton@imgtec.com
Cc: Raghu.Gandham@imgtec.com
Cc: Leonid.Yegoshin@imgtec.com
Cc: Douglas.Leung@imgtec.com
Cc: Petar.Jovanovic@imgtec.com
Cc: Goran.Ferenc@imgtec.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16511/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Miodrag Dinic
2017-06-19 17:50:11 +02:00
committed by Ralf Baechle
parent 3daf281f2c
commit 3f88ec6333
2 changed files with 115 additions and 78 deletions
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11
arch/mips/include/uapi/asm/inst.h
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@@ -762,6 +762,16 @@ struct msa_mi10_format { /* MSA MI10 */
;))))))
};
struct dsp_format { /* SPEC3 DSP format instructions */
__BITFIELD_FIELD(unsigned int opcode : 6,
__BITFIELD_FIELD(unsigned int base : 5,
__BITFIELD_FIELD(unsigned int index : 5,
__BITFIELD_FIELD(unsigned int rd : 5,
__BITFIELD_FIELD(unsigned int op : 5,
__BITFIELD_FIELD(unsigned int func : 6,
;))))))
};
struct spec3_format { /* SPEC3 */
__BITFIELD_FIELD(unsigned int opcode:6,
__BITFIELD_FIELD(unsigned int rs:5,
@@ -1053,6 +1063,7 @@ union mips_instruction {
struct b_format b_format;
struct ps_format ps_format;
struct v_format v_format;
struct dsp_format dsp_format;
struct spec3_format spec3_format;
struct fb_format fb_format;
struct fp0_format fp0_format;