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powerpc: Add ICSWX instruction

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Add the asm ICSWX and ICSWEPX opcodes.  Add definitions for the
Coprocessor Request structures needed to use the icswx calls to
coprocessors.  Add icswx() function to perform the ICSWX asm
using the provided Coprocessor Command Word value and
Coprocessor Request Block structure.

This is required for communication with the NX-842 coprocessor on
a PowerNV system.

Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dan Streetman
2015-05-07 13:49:13 -04:00
committed by Herbert Xu
parent b130e7c04f
commit edc424f8cd
2 changed files with 197 additions and 0 deletions
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13
arch/powerpc/include/asm/ppc-opcode.h
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@@ -136,6 +136,8 @@
#define PPC_INST_DCBAL 0x7c2005ec
#define PPC_INST_DCBZL 0x7c2007ec
#define PPC_INST_ICBT 0x7c00002c
#define PPC_INST_ICSWX 0x7c00032d
#define PPC_INST_ICSWEPX 0x7c00076d
#define PPC_INST_ISEL 0x7c00001e
#define PPC_INST_ISEL_MASK 0xfc00003e
#define PPC_INST_LDARX 0x7c0000a8
@@ -403,4 +405,15 @@
#define MFTMR(tmr, r) stringify_in_c(.long PPC_INST_MFTMR | \
TMRN(tmr) | ___PPC_RT(r))
/* Coprocessor instructions */
#define PPC_ICSWX(s, a, b) stringify_in_c(.long PPC_INST_ICSWX | \
___PPC_RS(s) | \
___PPC_RA(a) | \
___PPC_RB(b))
#define PPC_ICSWEPX(s, a, b) stringify_in_c(.long PPC_INST_ICSWEPX | \
___PPC_RS(s) | \
___PPC_RA(a) | \
___PPC_RB(b))
#endif /* _ASM_POWERPC_PPC_OPCODE_H */