From 4ba991d3eb379fbaa22049e7002341e97a673685 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 27 Jul 2011 21:06:16 -0700 Subject: sparc: Detect and handle UltraSPARC-T3 cpu types. The cpu compatible string we look for is "SPARC-T3". As far as memset/memcpy optimizations go, we treat this chip the same as Niagara-T2/T2+. Use cache initializing stores for memset, and use perfetch, FPU block loads, cache initializing stores, and block stores for copies. We use the Niagara-T2 perf support, since T3 is a close relative in this regard. Later we'll add support for the new events T3 can report, plus enable T3's new "sample" mode. For now I haven't added any new ELF hwcap flags. We probably need to add a couple, for example: T2 and T3 both support the population count instruction in hardware. T3 supports VIS3 instructions, including support (finally) for partitioned shift. One can also now move directly between float and integer registers. T3 supports instructions meant to help with Galois Field and other HPC calculations, such as XOR multiply. Also there are "OP and negate" instructions, for example "fnmul" which is multiply-and-negate. T3 recognizes the transactional memory opcodes, however since transactional memory isn't supported: 1) 'commit' behaves as a NOP and 2) 'chkpt' always branches 3) 'rdcps' returns all zeros and 4) 'wrcps' behaves as a NOP. So we'll need about 3 new elf capability flags in the end to represent all of these things. Signed-off-by: David S. Miller --- arch/sparc/kernel/head_64.S | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'arch/sparc/kernel/head_64.S') diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S index aa594c792d19..c752603a7c0d 100644 --- a/arch/sparc/kernel/head_64.S +++ b/arch/sparc/kernel/head_64.S @@ -132,6 +132,8 @@ prom_sun4v_name: .asciz "sun4v" prom_niagara_prefix: .asciz "SUNW,UltraSPARC-T" +prom_sparc_prefix: + .asciz "SPARC-T" .align 4 prom_root_compatible: .skip 64 @@ -379,6 +381,22 @@ sun4v_chip_type: sethi %hi(prom_niagara_prefix), %g7 or %g7, %lo(prom_niagara_prefix), %g7 mov 17, %g3 +90: ldub [%g7], %g2 + ldub [%g1], %g4 + cmp %g2, %g4 + bne,pn %icc, 89f + add %g7, 1, %g7 + subcc %g3, 1, %g3 + bne,pt %xcc, 90b + add %g1, 1, %g1 + ba,pt %xcc, 91f + nop + +89: sethi %hi(prom_cpu_compatible), %g1 + or %g1, %lo(prom_cpu_compatible), %g1 + sethi %hi(prom_sparc_prefix), %g7 + or %g7, %lo(prom_sparc_prefix), %g7 + mov 7, %g3 90: ldub [%g7], %g2 ldub [%g1], %g4 cmp %g2, %g4 @@ -389,6 +407,15 @@ sun4v_chip_type: add %g1, 1, %g1 sethi %hi(prom_cpu_compatible), %g1 + or %g1, %lo(prom_cpu_compatible), %g1 + ldub [%g1 + 7], %g2 + cmp %g2, '3' + be,pt %xcc, 5f + mov SUN4V_CHIP_NIAGARA3, %g4 + ba,pt %xcc, 4f + nop + +91: sethi %hi(prom_cpu_compatible), %g1 or %g1, %lo(prom_cpu_compatible), %g1 ldub [%g1 + 17], %g2 cmp %g2, '1' @@ -397,6 +424,7 @@ sun4v_chip_type: cmp %g2, '2' be,pt %xcc, 5f mov SUN4V_CHIP_NIAGARA2, %g4 + 4: mov SUN4V_CHIP_UNKNOWN, %g4 5: sethi %hi(sun4v_chip_type), %g2 @@ -514,6 +542,9 @@ niagara_tlb_fixup: cmp %g1, SUN4V_CHIP_NIAGARA2 be,pt %xcc, niagara2_patch nop + cmp %g1, SUN4V_CHIP_NIAGARA3 + be,pt %xcc, niagara2_patch + nop call generic_patch_copyops nop -- cgit v1.2.3-59-g8ed1b