- 28 3月, 2015 3 次提交
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由 Paul Burton 提交于
Assuming at ($1) as the source or destination register of copy or insert instructions: - Simplifies the macros providing those instructions for toolchains without MSA support. - Avoids an unnecessary move instruction when at is used as the source or destination register anyway. - Is sufficient for the uses to be introduced in the kernel by a subsequent patch. Note that due to a patch ordering snafu on my part this also fixes the currently broken build with MSA support enabled. The build has been broken since commit c9017757 "MIPS: init upper 64b of vector registers when MSA is first used", which this patch should have preceeded. Signed-off-by: NPaul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9161/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Paul Burton 提交于
The {save,restore}_fp_context{,32} functions require that the assembler allows the use of sdc instructions on any FP register, and this is acomplished by setting the arch to mips64r2 or mips64r6 (using MIPS_ISA_ARCH_LEVEL_RAW). However this has the effect of enabling the assembler to use mips64 instructions in the expansion of pseudo-instructions. This was done in the (now-reverted) commit eec43a22 "MIPS: Save/restore MSA context around signals" which led to my mistakenly believing that there was an assembler bug, when in reality the assembler was just emitting mips64 instructions. Avoid the issue for future commits which will add code to r4k_fpu.S by pushing the .set MIPS_ISA_ARCH_LEVEL_RAW directives into the functions that require it, and remove the spurious assertion declaring the assembler bug. Signed-off-by: NPaul Burton <paul.burton@imgtec.com> [james.hogan@imgtec.com: Rebase on v4.0-rc1 and reword commit message to reflect use of MIPS_ISA_ARCH_LEVEL_RAW] Signed-off-by: NJames Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9612/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 James Hogan 提交于
The lose_fpu() function only disables the FPU in CP0_Status.CU1 if the FPU is in use and MSA isn't enabled. This isn't necessarily a problem because KSTK_STATUS(current), the version of CP0_Status stored on the kernel stack on entry from user mode, does always get updated and gets restored when returning to user mode, but I don't think it was intended, and it is inconsistent with the case of only the FPU being in use. Sometimes leaving the FPU enabled may also mask kernel bugs where FPU operations are executed when the FPU might not be enabled. So lets disable the FPU in the MSA case too. Fixes: 33c771ba ("MIPS: save/disable MSA in lose_fpu") Signed-off-by: NJames Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9323/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 20 2月, 2015 14 次提交
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由 Chandrakala Chavva 提交于
Read clock rate from the correct CSR. Don't clear COP0_DCACHE for OCTEONIII. Signed-off-by: NChandrakala Chavva <cchavva@caviumnetworks.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Signed-off-by: NDavid Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8945/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Chad Reese 提交于
CN38XX pass 1 required icache prefetching to be turned off. This chip never reached production and is long dead. Other processor specific icache settings are done by the bootloader. Remove these bits from the kernel. Signed-off-by: NChad Reese <kreese@caviumnetworks.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: David Daney <david.daney@cavium.com> Patchwork: https://patchwork.linux-mips.org/patch/8944/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Signed-off-by: NDavid Daney <david.daney@cavium.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8943/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Add coverage for OCTEON III models. Signed-off-by: NDavid Daney <david.daney@cavium.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8942/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Make messages refer to all CN6XXX. Signed-off-by: NDavid Daney <david.daney@cavium.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8941/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Also update union octeon_cvmemctl with new OCTEON II fields. [aleksey.makarov@auriga.com: use __BITFIELD_FIELD] Signed-off-by: NDavid Daney <david.daney@cavium.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8940/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Disable ICache prefetch for certian Octeon II processors. Signed-off-by: NDavid Daney <david.daney@cavium.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8938/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Allocate new save space, and then save/restore the registers if OCTEON III. Signed-off-by: NDavid Daney <david.daney@cavium.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8935/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
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: NDavid Daney <david.daney@cavium.com> Signed-off-by: NLeonid Rosenboim <lrosenboim@caviumnetworks.com> Signed-off-by: NAleksey 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: NRalf Baechle <ralf@linux-mips.org>
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由 David Daney 提交于
Signed-off-by: NDavid Daney <david.daney@cavium.com> Signed-off-by: NAleksey Makarov <aleksey.makarov@auriga.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8737/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Lars-Peter Clausen 提交于
There are currently no gio device drivers that implement suspend/resume and this patch removes the bus specific legacy suspend and resume callbacks. This will allow us to eventually remove struct bus_type legacy suspend and resume support altogether. gio device drivers wanting to implement suspend and resume can use dev PM ops which will work out of the box without further modifications necessary. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Acked-by: NThomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8920/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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Without these, there are multiple definitions of pci_proc_domain() and pci_domain_nr() if linux/pci.h and asm/pci.h are included. Add #ifdefs around them Signed-off-by: NZubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Reviewed-by: NMarkos Chandras <Markos.Chandras@imgtec.com> Cc: Markos.Chandras@imgtec.com Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8670/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Steven J. Hill 提交于
Build set and clear macros for the PageGrain register. Signed-off-by: NSteven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9289/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Steven J. Hill 提交于
* Clean up white spaces and tabs. * Get rid of remaining hardcoded values for calculating shifts and masks. * Get rid of redundant macro values. * Do not use page table bits directly in #ifdef's. Signed-off-by: NSteven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9287/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 19 2月, 2015 1 次提交
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由 Petr Malat 提交于
Provide correct siginfo_t.si_stime on MIPS64 Bug description: MIPS version of copy_siginfo() is not aware of alignment on platforms with 64-bit long integers, which leads to an incorrect si_stime passed to signal handlers, because the last element (si_stime) of _sifields._sigchld is not copied. If _MIPS_SZLONG is 64, then the _sifields starts at the offset of 4 * sizeof(int). Patch description: Use the generic copy_siginfo, which doesn't have this problem. Signed-off-by: NPetr Malat <oss@malat.biz> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8671/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 17 2月, 2015 22 次提交
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由 Markos Chandras 提交于
The previous implementation did not cover all possible FPU combinations and it silently allowed ABI incompatible objects to be loaded with the wrong ABI. For example, the previous logic would set the FP_64 ABI as the matching ABI for an FP_XX object combined with an FP_64A object. This was wrong, and the matching ABI should have been FP_64A. The previous logic is now replaced with a new one which determines the appropriate FPU mode to be used rather than the FP ABI. This has the advantage that the entire logic is much simpler since it is the FPU mode we are interested in rather than the FP ABI resulting to code simplifications. This also removes the now obsolete FP32XX_HYBRID_FPRS option. Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS32 R6 has a 64-bit FPU so add the necessary MIPS R6 definition. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R2 FPU instructions are also present in MIPS R6 so amend the preprocessor definitions to take MIPS R6 into consideration. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
The ERETNC instruction, introduced in MIPS R5, is similar to the ERET one, except it does not clear the LLB bit in the LLADDR register. This feature is necessary to safely emulate R2 LL/SC instructions. However, on context switches, we need to clear the LLAddr/LLB bit in order to make sure that an SC instruction from the new thread will never succeed if it happens to interrupt an LL operation on the same address from the previous thread. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Leonid Yegoshin 提交于
MIPS R6 removed quite a few R2 instructions. However, there is plenty of <R6 userland code so we add an in-kernel emulator so we can still be able to execute all R2 userland out there. The emulator comes with a handy debugfs under /mips/ directory (r2-emul-stats) to provide some basic statistics of the instructions that are being emulated. Below are some statistics from booting a minimal buildroot image: Instruction Total BDslot ------------------------------ movs 236969 0 hilo 56686 0 muls 55279 0 divs 10941 0 dsps 0 0 bops 1 0 traps 0 0 fpus 0 0 loads 214981 17 stores 103364 0 llsc 56898 0 dsemul 150418 0 jr 370158 bltzl 43 bgezl 1594 bltzll 0 bgezll 0 bltzal 39 bgezal 39 beql 14503 bnel 138741 blezl 0 bgtzl 3988 Signed-off-by: NLeonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
If Config5/LLB is set in the core, then software can write the LLB bit in the LLADDR register. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
The LLBIT (bit 4) in the Config5 CP0 register indicates the software availability of the Load-Linked bit. This bit is only set by hardware and it has the following meaning: 0: LLB functionality is not supported 1: LLB functionality is supported. The following feature are also supported: - ERETNC instruction. Similar to ERET but it does not clear the LLB bit in the LLAddr register. - CP0 LLAddr/LLB bit must be set - LLbit is software accessible through the LLAddr[0] This will be used later on to emulate R2 LL/SC instructions. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 uses the <R6 sdc2 opcode for the new BNEZC and JIALC instructions Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 uses the <R6 ldc2 opcode for the new BEQZC and JIC instructions Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 uses the <R6 swc2 opcode for the new BALC instructions. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 uses the <R6 DADDI opcode for the new BNVC, BNEC and BNEZLAC instructions. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 uses the <R6 ADDI opcode for the new BOVC, BEQC and BEQZALC instructions. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 uses the <R6 LWC2 opcode for the new BC instruction. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 introduced the following two branch instructions for COP1: BC1EQZ: Branch if Cop1 (FPR) Register Bit 0 is Equal to Zero BC1NEZ: Branch if Cop1 (FPR) Register Bit 0 is Not Equal to Zero Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
The MIPS R6 JR instruction is an alias to the JALR one, so it may need emulation for non-R6 userlands. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Leonid Yegoshin 提交于
Add the MIPS R6 related preprocessor definitions for save/restore FPU related functions. We also set the appropriate ISA level so the final return instruction "jr ra" will produce the correct opcode on R6. Signed-off-by: NLeonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
Print 'mips64r6' and/or 'mips32r6' if the kernel is running on a MIPS R6 core. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 changed the opcodes for LL/SC instructions so we need to set the appropriate ISA level. Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
"sub $reg, imm" is not a real MIPS instruction. The assembler can replace that with "addi $reg, -imm". However, addi has been removed from R6, so we replace the "sub" instruction with the "addiu" one. Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 changed the opcodes for LL/SC instructions so we need to set the appropriate ISA level. Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 changed the opcodes for LL/SC instructions so we need to set the correct ISA level. Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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由 Markos Chandras 提交于
MIPS R6 changed the opcodes for LL/SC instructions so we need to set the correct ISA level. Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
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