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Commit c6593dde authored by Paul Burton's avatar Paul Burton Committed by Ralf Baechle
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MIPS: Add accessor & bit definitions for GlobalNumber 



MIPSr6 introduces a GlobalNumber register, which is required when VPs
are implemented (ie. when multi-threading is supported) but otherwise
optional. The register contains sufficient information to uniquely
identify a VP within a system using its cluster number, core number & VP
ID.

In preparation for using this register & its fields, introduce an
accessor macro for it & define its various bits with the typical style
preprocessor macros.

Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17007/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 23cb600e

arch/mips/include/asm/mipsregs.h

+13 −0
Original line number Original line Diff line number Diff line
@@ -48,6 +48,7 @@ 
#define CP0_ENTRYLO0 $2

#define CP0_ENTRYLO0 $2

#define CP0_ENTRYLO1 $3

#define CP0_ENTRYLO1 $3

#define CP0_CONF $3

#define CP0_CONF $3

#define CP0_GLOBALNUMBER $3, 1

#define CP0_CONTEXT $4

#define CP0_CONTEXT $4

#define CP0_PAGEMASK $5

#define CP0_PAGEMASK $5

#define CP0_SEGCTL0 $5, 2

#define CP0_SEGCTL0 $5, 2
@@ -147,6 +148,16 @@ 
#define MIPS_ENTRYLO_XI		(_ULCAST_(1) << (BITS_PER_LONG - 2))

#define MIPS_ENTRYLO_XI		(_ULCAST_(1) << (BITS_PER_LONG - 2))

#define MIPS_ENTRYLO_RI		(_ULCAST_(1) << (BITS_PER_LONG - 1))

#define MIPS_ENTRYLO_RI		(_ULCAST_(1) << (BITS_PER_LONG - 1))





/*

 * MIPSr6+ GlobalNumber register definitions

 */

#define MIPS_GLOBALNUMBER_VP_SHF	0

#define MIPS_GLOBALNUMBER_VP		(_ULCAST_(0xff) << MIPS_GLOBALNUMBER_VP_SHF)

#define MIPS_GLOBALNUMBER_CORE_SHF	8

#define MIPS_GLOBALNUMBER_CORE		(_ULCAST_(0xff) << MIPS_GLOBALNUMBER_CORE_SHF)

#define MIPS_GLOBALNUMBER_CLUSTER_SHF	16

#define MIPS_GLOBALNUMBER_CLUSTER	(_ULCAST_(0xf) << MIPS_GLOBALNUMBER_CLUSTER_SHF)



/*

/*

 * Values for PageMask register

 * Values for PageMask register

 */

 */
@@ -1446,6 +1457,8 @@ do { \ 
#define read_c0_conf()		__read_32bit_c0_register($3, 0)

#define read_c0_conf()		__read_32bit_c0_register($3, 0)

#define write_c0_conf(val)	__write_32bit_c0_register($3, 0, val)

#define write_c0_conf(val)	__write_32bit_c0_register($3, 0, val)





#define read_c0_globalnumber()	__read_32bit_c0_register($3, 1)



#define read_c0_context()	__read_ulong_c0_register($4, 0)

#define read_c0_context()	__read_ulong_c0_register($4, 0)

#define write_c0_context(val)	__write_ulong_c0_register($4, 0, val)

#define write_c0_context(val)	__write_ulong_c0_register($4, 0, val)