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MIPS: OCTEON: Save/Restore wider multiply registers in OCTEON III CPUs

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The wide multiplier is twice as wide, so we need to save twice as much
state.  Detect the multiplier type (CPU type) at start up and install
model specific handlers.

[aleksey.makarov@auriga.com:
	conflict resolution,
	support for old compilers]

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8933/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney
2015-01-15 16:11:05 +03:00
committed by Ralf Baechle
parent 9d6b80faf9
commit ac655fb762
4 changed files with 151 additions and 33 deletions
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13
arch/mips/include/asm/octeon/octeon.h
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@@ -229,6 +229,19 @@ static inline void octeon_npi_write32(uint64_t address, uint32_t val)
cvmx_read64_uint32(address ^ 4);
}
/* Octeon multiplier save/restore routines from octeon_switch.S */
void octeon_mult_save(void);
void octeon_mult_restore(void);
void octeon_mult_save_end(void);
void octeon_mult_restore_end(void);
void octeon_mult_save3(void);
void octeon_mult_save3_end(void);
void octeon_mult_save2(void);
void octeon_mult_save2_end(void);
void octeon_mult_restore3(void);
void octeon_mult_restore3_end(void);
void octeon_mult_restore2(void);
void octeon_mult_restore2_end(void);
/**
* Read a 32bit value from the Octeon NPI register space