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MIPS: Add microMIPS MSA support.

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This patch adds support for the microMIPS implementation of the MSA
instructions.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Reviewed-by: Paul Burton <Paul.Burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6763/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Steven J. Hill 2014-04-15 16:06:49 -05:00 committed by Ralf Baechle
parent 8e9ecbc5e2
commit d96cc3d1ec
2 changed files with 43 additions and 10 deletions
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40
arch/mips/include/asm/asmmacro.h
View File

@ -249,13 +249,35 @@
.set pop
.endm
#else
#ifdef CONFIG_CPU_MICROMIPS
#define CFC_MSA_INSN 0x587e0056
#define CTC_MSA_INSN 0x583e0816
#define LDD_MSA_INSN 0x58000837
#define STD_MSA_INSN 0x5800083f
#define COPY_UW_MSA_INSN 0x58f00056
#define COPY_UD_MSA_INSN 0x58f80056
#define INSERT_W_MSA_INSN 0x59300816
#define INSERT_D_MSA_INSN 0x59380816
#else
#define CFC_MSA_INSN 0x787e0059
#define CTC_MSA_INSN 0x783e0819
#define LDD_MSA_INSN 0x78000823
#define STD_MSA_INSN 0x78000827
#define COPY_UW_MSA_INSN 0x78f00059
#define COPY_UD_MSA_INSN 0x78f80059
#define INSERT_W_MSA_INSN 0x79300819
#define INSERT_D_MSA_INSN 0x79380819
#endif
/*
* Temporary until all toolchains in use include MSA support.
*/
.macro cfcmsa rd, cs
.set push
.set noat
.word 0x787e0059 | (\cs << 11)
.insn
.word CFC_MSA_INSN | (\cs << 11)
move \rd, $1
.set pop
.endm
@ -264,7 +286,7 @@
.set push
.set noat
move $1, \rs
.word 0x783e0819 | (\cd << 6)
.word CTC_MSA_INSN | (\cd << 6)
.set pop
.endm
@ -272,7 +294,7 @@
.set push
.set noat
add $1, \base, \off
.word 0x78000823 | (\wd << 6)
.word LDD_MSA_INSN | (\wd << 6)
.set pop
.endm
@ -280,14 +302,15 @@
.set push
.set noat
add $1, \base, \off
.word 0x78000827 | (\wd << 6)
.word STD_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro copy_u_w rd, ws, n
.set push
.set noat
.word 0x78f00059 | (\n << 16) | (\ws << 11)
.insn
.word COPY_UW_MSA_INSN | (\n << 16) | (\ws << 11)
/* move triggers an assembler bug... */
or \rd, $1, zero
.set pop
@ -296,7 +319,8 @@
.macro copy_u_d rd, ws, n
.set push
.set noat
.word 0x78f80059 | (\n << 16) | (\ws << 11)
.insn
.word COPY_UD_MSA_INSN | (\n << 16) | (\ws << 11)
/* move triggers an assembler bug... */
or \rd, $1, zero
.set pop
@ -307,7 +331,7 @@
.set noat
/* move triggers an assembler bug... */
or $1, \rs, zero
.word 0x79300819 | (\n << 16) | (\wd << 6)
.word INSERT_W_MSA_INSN | (\n << 16) | (\wd << 6)
.set pop
.endm
@ -316,7 +340,7 @@
.set noat
/* move triggers an assembler bug... */
or $1, \rs, zero
.word 0x79380819 | (\n << 16) | (\wd << 6)
.word INSERT_D_MSA_INSN | (\n << 16) | (\wd << 6)
.set pop
.endm
#endif

13
arch/mips/include/asm/msa.h
View File

@ -96,6 +96,13 @@ static inline void write_msa_##name(unsigned int val) \
* allow compilation with toolchains that do not support MSA. Once all
* toolchains in use support MSA these can be removed.
*/
#ifdef CONFIG_CPU_MICROMIPS
#define CFC_MSA_INSN 0x587e0056
#define CTC_MSA_INSN 0x583e0816
#else
#define CFC_MSA_INSN 0x787e0059
#define CTC_MSA_INSN 0x783e0819
#endif
#define __BUILD_MSA_CTL_REG(name, cs) \
static inline unsigned int read_msa_##name(void) \
@ -104,7 +111,8 @@ static inline unsigned int read_msa_##name(void) \
__asm__ __volatile__( \
" .set push\n" \
" .set noat\n" \
" .word 0x787e0059 | (" #cs " << 11)\n" \
" .insn\n" \
" .word #CFC_MSA_INSN | (" #cs " << 11)\n" \
" move %0, $1\n" \
" .set pop\n" \
: "=r"(reg)); \
@ -117,7 +125,8 @@ static inline void write_msa_##name(unsigned int val) \
" .set push\n" \
" .set noat\n" \
" move $1, %0\n" \
" .word 0x783e0819 | (" #cs " << 6)\n" \
" .insn\n" \
" .word #CTC_MSA_INSN | (" #cs " << 6)\n" \
" .set pop\n" \
: : "r"(val)); \
}