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2017-08-29MIPS: math-emu: <MADDF|MSUBF>.<D|S>: Fix some cases of infinite inputsAleksandar Markovic
Fix the cases of <MADDF|MSUBF>.<D|S> when any of two multiplicands is infinity. The correct behavior in such cases is affected by the nature of third input. Cases of addition of infinities with opposite signs and subtraction of infinities with same signs may arise and must be handles separately. Also, the value od flags argument (that determines whether the instruction is MADDF or MSUBF) affects the outcome. Relevant examples: MADDF.S fd,fs,ft: If fs contains +inf, ft contains +inf, and fd contains -inf, fd is going to contain indef (without this patch, it used to contain -inf). MSUBF.S fd,fs,ft: If fs contains +inf, ft contains 1.0, and fd contains +0.0, fd is going to contain -inf (without this patch, it used to contain +inf). Fixes: e24c3bec3e8e ("MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction") Fixes: 83d43305a1df ("MIPS: math-emu: Add support for the MIPS R6 MSUBF FPU instruction") Signed-off-by: Douglas Leung <douglas.leung@imgtec.com> Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.7+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16887/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: <MADDF|MSUBF>.<D|S>: Fix NaN propagationAleksandar Markovic
Fix the cases of <MADDF|MSUBF>.<D|S> when any of three inputs is any NaN. Correct behavior of <MADDF|MSUBF>.<D|S> fd, fs, ft is following: - if any of inputs is sNaN, return a sNaN using following rules: if only one input is sNaN, return that one; if more than one input is sNaN, order of precedence for return value is fd, fs, ft - if no input is sNaN, but at least one of inputs is qNaN, return a qNaN using following rules: if only one input is qNaN, return that one; if more than one input is qNaN, order of precedence for return value is fd, fs, ft The previous code contained correct handling of some above cases, but not all. Also, such handling was scattered into various cases of "switch (CLPAIR(xc, yc))" statement, and elsewhere. With this patch, this logic is placed in one place, and "switch (CLPAIR(xc, yc))" is significantly simplified. A relevant example: MADDF.S fd,fs,ft: If fs contains qNaN1, ft contains qNaN2, and fd contains qNaN3, fd is going to contain qNaN3 (without this patch, it used to contain qNaN1). Fixes: e24c3bec3e8e ("MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction") Fixes: 83d43305a1df ("MIPS: math-emu: Add support for the MIPS R6 MSUBF FPU instruction") Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.7+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16886/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: MINA.<D|S>: Fix some cases of infinity and zero inputsAleksandar Markovic
Fix following special cases for MINA>.<D|S>: - if one of the inputs is zero, and the other is subnormal, normal, or infinity, the value of the former should be returned (that is, a zero). - if one of the inputs is infinity, and the other input is normal, or subnormal, the value of the latter should be returned. The previous implementation's logic for such cases was incorrect - it appears as if it implements MAXA, and not MINA instruction. A relevant example: MINA.S fd,fs,ft: If fs contains 100.0, and ft contains 0.0, fd is going to contain 0.0 (without this patch, it used to contain 100.0). Fixes: a79f5f9ba508 ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b20e2f ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.3+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16885/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: <MAXA|MINA>.<D|S>: Fix cases of both infinite inputsAleksandar Markovic
Fix the value returned by <MAXA|MINA>.<D|S> fd,fs,ft, if both inputs are infinite. The previous implementation returned always the value contained in ft in such cases. The correct behavior is specified in Mips instruction set manual and is as follows: fs ft MAXA MINA --------------------------------- inf inf inf inf inf -inf inf -inf -inf inf inf -inf -inf -inf -inf -inf A relevant example: MAXA.S fd,fs,ft: If fs contains +inf, and ft contains -inf, fd is going to contain +inf (without this patch, it used to contain -inf). Fixes: a79f5f9ba508 ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b20e2f ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.3+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16884/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: <MAXA|MINA>.<D|S>: Fix cases of input values with opposite signsAleksandar Markovic
Fix the value returned by <MAXA|MINA>.<D|S>, if the inputs are normal fp numbers of the same absolute value, but opposite signs. A relevant example: MAXA.S fd,fs,ft: If fs contains -3.0, and ft contains +3.0, fd is going to contain +3.0 (without this patch, it used to contain -3.0). Fixes: a79f5f9ba508 ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b20e2f ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.3+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16883/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: <MAX|MIN>.<D|S>: Fix cases of both inputs negativeAleksandar Markovic
Fix the value returned by <MAX|MIN>.<D|S>, if both inputs are negative normal fp numbers. The previous logic did not take into account that if both inputs have the same sign, there should be separate treatment of the cases when both inputs are negative and when both inputs are positive. A relevant example: MAX.S fd,fs,ft: If fs contains -5.0, and ft contains -7.0, fd is going to contain -5.0 (without this patch, it used to contain -7.0). Fixes: a79f5f9ba508 ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b20e2f ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.3+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16882/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: <MAX|MAXA|MIN|MINA>.<D|S>: Fix cases of both inputs zeroAleksandar Markovic
Fix the value returned by <MAX|MAXA|MIN|MINA>.<D|S>, if both inputs are zeros. The right behavior in such cases is stated in instruction reference manual and is as follows: fs ft MAX MIN MAXA MINA --------------------------------------------- 0 0 0 0 0 0 0 -0 0 -0 0 -0 -0 0 0 -0 0 -0 -0 -0 -0 -0 -0 -0 Prior to this patch, some of the above cases were yielding correct results. However, for the sake of code consistency, all such cases are rewritten in this patch. A relevant example: MAX.S fd,fs,ft: If fs contains +0.0, and ft contains -0.0, fd is going to contain +0.0 (without this patch, it used to contain -0.0). Fixes: a79f5f9ba508 ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b20e2f ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.3+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16881/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: <MAX|MAXA|MIN|MINA>.<D|S>: Fix quiet NaN propagationAleksandar Markovic
Fix the value returned by <MAX|MAXA|MIN|MINA>.<D|S> fd,fs,ft, if both inputs are quiet NaNs. The <MAX|MAXA|MIN|MINA>.<D|S> specifications state that the returned value in such cases should be the quiet NaN contained in register fs. A relevant example: MAX.S fd,fs,ft: If fs contains qNaN1, and ft contains qNaN2, fd is going to contain qNaN1 (without this patch, it used to contain qNaN2). Fixes: a79f5f9ba508 ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b20e2f ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com> Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com> Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: Bo Hu <bohu@google.com> Cc: Douglas Leung <douglas.leung@imgtec.com> Cc: Jin Qian <jinqian@google.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Petar Jovanovic <petar.jovanovic@imgtec.com> Cc: Raghu Gandham <raghu.gandham@imgtec.com> Cc: <stable@vger.kernel.org> # 4.3+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16880/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Declare various variables & functions staticPaul Burton
We currently have various variables & functions which are only used within a single translation unit, but which we don't declare static. This causes various sparse warnings of the form: arch/mips/kernel/mips-r2-to-r6-emul.c:49:1: warning: symbol 'mipsr2emustats' was not declared. Should it be static? arch/mips/kernel/unaligned.c:1381:11: warning: symbol 'reg16to32st' was not declared. Should it be static? arch/mips/mm/mmap.c:146:15: warning: symbol 'arch_mmap_rnd' was not declared. Should it be static? Fix these & others by declaring various affected variables & functions static, avoiding the sparse warnings & redundant symbols. [ralf@linux-mips.org: Add Marcin's build fix.] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17176/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Remove plat_timer_setup()Paul Burton
The plat_timer_setup() function is entirely unused - nothing calls it, and no platforms provide it. Perhaps our dummy implementation was once useful as an aid in forward porting platforms, but its time has long since passed so let's remove the dead code. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17175/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Remove __invalidate_kernel_vmap_rangePaul Burton
The __invalidate_kernel_vmap_range function pointer global variable isn't used anywhere. Remove it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17174/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: Correct user fault_addr typePaul Burton
The fault_addr argument to fpu_emulator_cop1Handler(), fpux_emu() and cop1Emulate() has up until now been declared as: void *__user *fault_addr This is essentially a pointer in user memory which points to a pointer to void. This is not the intent for our code, which is actually operating on a pointer to a pointer to void where the pointer to void is pointing at user memory. ie. the pointer is in kernel memory & points to user memory. This mismatch produces a lot of sparse warnings that look like this: arch/mips/math-emu/cp1emu.c:1485:45: warning: incorrect type in assignment (different address spaces) expected void *[noderef] <asn:1><noident> got unsigned int [noderef] [usertype] <asn:1>*[assigned] va Fix these by modifying the declaration of the fault_addr argument to: void __user **fault_addr Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17173/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Include linux/initrd.h for free_initrd_mem()Paul Burton
arch/mips/mm/init.c provides our implementation of free_initrd_mem(), but doesn't include the linux/initrd.h header which declares them. This leads to a warning from sparse: arch/mips/mm/init.c:501:6: warning: symbol 'free_initrd_mem' was not declared. Should it be static? Fix this by including linux/initrd.h to get the declaration of free_initrd_mem(). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17172/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Include elf-randomize.h for arch_mmap_rnd() & arch_randomize_brk()Paul Burton
arch/mips/mm/mmap.c provides our implementations of the arch_mmap_rnd() & arch_randomize_brk() functions, but doesn't include the linux/elf-randomize.h header which declares them. This leads to warnings from sparse: arch/mips/mm/mmap.c:146:15: warning: symbol 'arch_mmap_rnd' was not declared. Should it be static? arch/mips/mm/mmap.c:190:15: warning: symbol 'arch_randomize_brk' was not declared. Should it be static? Fix this by including linux/elf-randomize.h to get the declarations of arch_mmap_rnd() & arch_randomize_brk(). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17171/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Include asm/delay.h for __{,n,u}delay()Paul Burton
arch/mips/lib/delay.c provides our implementations of the __delay(), __ndelay() & __udelay() functions, but doesn't include the asm/delay.h header which declares them. This leads to warnings from sparse: arch/mips/lib/delay.c:26:6: warning: symbol '__delay' was not declared. Should it be static? arch/mips/lib/delay.c:50:6: warning: symbol '__udelay' was not declared. Should it be static? arch/mips/lib/delay.c:58:6: warning: symbol '__ndelay' was not declared. Should it be static? To keep checkpatch happy was well, include <linux/delay.h> rather than <asm/delay.h> directly to get the declarations of __delay(), __ndelay() & __udelay(). [ralf@linux-mips.org: Fixed to include <linux/delay.h.] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17170/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Include linux/cpu.h for arch_cpu_idle()Paul Burton
arch/mips/kernel/idle.c provides our implementation of the arch_cpu_idle() function, but doesn't include the linux/cpu.h header which declares it. This leads to a warning from sparse: arch/mips/kernel/idle.c:256:6: warning: symbol 'arch_cpu_idle' was not declared. Should it be static? Fix this by including linux/cpu.h to get the declaration of arch_cpu_idle(). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17169/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Include asm/setup.h for cpu_cache_init()Paul Burton
arch/mips/mm/cache.c provides our implementation of the cpu_cache_init() function, but doesn't include the asm/setup.h header which declares it. This leads to a warning from sparse: arch/mips/mm/cache.c:274:6: warning: symbol 'cpu_cache_init' was not declared. Should it be static? Fix this by including asm/setup.h to get the declaration of cpu_cache_init(). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17168/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: generic: Include asm/time.h for get_c0_*_int()Paul Burton
arch/mips/generic/irq.c provides implementations of the get_c0_compare_int() & get_c0_perfcount_int() functions, but doesn't include the asm/time.h header which declares them. This leads to warnings from sparse: arch/mips/generic/irq.c:36:5: warning: symbol 'get_c0_perfcount_int' was not declared. Should it be static? arch/mips/generic/irq.c:52:14: warning: symbol 'get_c0_compare_int' was not declared. Should it be static? Fix this by including asm/time.h to get the declarations of get_c0_compare_int() & get_c0_perfcount_int(). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17167/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: generic: Include asm/bootinfo.h for plat_fdt_relocated()Paul Burton
arch/mips/generic/init.c provides an implementation of the plat_fdt_relocated() function, but doesn't include the asm/bootinfo.h header which declares it. This leads to a warning from sparse: arch/mips/generic/init.c:94:13: warning: symbol 'plat_fdt_relocated' was not declared. Should it be static? Fix this by including asm/bootinfo.h to get the declaration of plat_fdt_relocated(). We also #ifdef our definition of plat_fdt_relocated() such that it is only provided when CONFIG_RELOCATABLE is set, matching the header & avoiding the redundant function for non-relocatable kernels. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Patchwork: https://patchwork.linux-mips.org/patch/17166/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Consolidate coherent and non-coherent dma_alloc codeChristoph Hellwig
Besides eliminating lots of duplication this also allows allocations with the DMA_ATTR_NON_CONSISTENT to use the CMA allocator. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17181/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: configs: Add Onion Omega2+ defconfigHarvey Hunt
Create a defconfig for the Omega2+ that reaches userspace and allows use of the USB port. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: robh+dt@kernel.org Cc: mark.rutland@arm.com Cc: john@phrozen.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17138/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Add Onion Omega2+ boardHarvey Hunt
The Onion Omega2+ is an MT7688A based board that has 128MB RAM and multiple peripherals. The MT7688A is pin compatible with the MT7628A, although the former supports a 1T1R antenna whereas the MT7628A supports a 2R2T antenna. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: robh+dt@kernel.org Cc: mark.rutland@arm.com Cc: john@phrozen.org Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17137/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: configs: Add VoCore2 defconfigHarvey Hunt
Enabled supported drivers, including: - USB PHY - EHCI - UART Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: robh+dt@kernel.org Cc: mark.rutland@arm.com Cc: john@phrozen.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17135/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: dts: Add Vocore2 boardHarvey Hunt
The VoCore2 board is a low cost MT7628A based board with 128MB RAM, 16MB flash and multiple external peripherals. This initial DTS provides enough support to get to userland and use the USB port. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: robh+dt@kernel.org Cc: mark.rutland@arm.com Cc: john@phrozen.org Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17134/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29dt-bindings: vendors: Add VoCore as a vendorHarvey Hunt
VoCore are a manufacturer of devices such as the VoCore2. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Acked-by: Rob Herring <robh@kernel.org> Cc: robh+dt@kernel.org Cc: mark.rutland@arm.com Cc: john@phrozen.org Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17132/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: dts: ralink: Add Mediatek MT7628A SoCHarvey Hunt
The MT7628A is the successor to the MT7620 and pin compatible with the MT7688A, although the latter supports only a 1T1R antenna rather than a 2T2R antenna. This commit adds support for the following features: - UART - USB PHY - EHCI - Interrupt controller - System controller - Memory controller - Reset controller Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: robh+dt@kernel.org Cc: mark.rutland@arm.com Cc: john@phrozen.org Cc: Harvey Hunt <harvey.hunt@imgtec.com> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mediatek@lists.infradead.org Patchwork: https://patchwork.linux-mips.org/patch/17133/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Alchemy: Threaded carddetect irqs for devboardsManuel Lauss
This introduces threaded carddetect irqs for the db1200/db1300 boards. Main benefit is that the broken insertion/ejection interrupt pairs can now be better supported and debounced in software. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15287/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Alchemy: update cpu feature overridesManuel Lauss
No advanced MIPS features for Alchemy. This patch shaves additional 43kB off the DB1300 kernel (~0.5% size reduction). Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15286/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Alchemy: Add devboard machine type to cpuinfoManuel Lauss
Prints the devboard name in cpuinfo "machine" line. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15285/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: math-emu: do not use bools for arithmeticManuel Lauss
GCC-7 complains about a boolean value being used with an arithmetic AND: arch/mips/math-emu/cp1emu.c: In function 'cop1Emulate': arch/mips/math-emu/cp1emu.c:838:14: warning: '~' on a boolean expression [-Wbool-operation] fpr = (x) & ~(cop1_64bit(xcp) == 0); \ ^ arch/mips/math-emu/cp1emu.c:1068:3: note: in expansion of macro 'DITOREG' DITOREG(dval, MIPSInst_RT(ir)); ^~~~~~~ arch/mips/math-emu/cp1emu.c:838:14: note: did you mean to use logical not? fpr = (x) & ~(cop1_64bit(xcp) == 0); \ Since cop1_64bit() returns and int, just flip the LSB. Suggested-by: Maciej W. Rozycki <macro@imgtec.com> Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Reviewed-by: Maciej W. Rozycki <macro@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/17058/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: dts: Ci20: Add ethernet and fixed-regulator nodesHarvey Hunt
Add devicetree nodes for the DM9000 and the ethernet power regulator. Additionally, add a new pinctrl node for the ethernet chip's pins. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Paul Cercueil <paul@crapouillou.net> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16752/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Ci20: Enable GPIO driverHarvey Hunt
Update the Ci20's defconfig to enable the JZ4780's GPIO driver. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16751/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: generic: Move NI 169445 FIT image source to its own filePaul Burton
Move the NI 169445 board flattened image tree source into its own file which is concatenated into the final image tree source used to build the flattened image tree. Separating boards into different files will help us to avoid conflicts as boards are added. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: Nathan Sullivan <nathan.sullivan@ni.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16940/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: generic: Move Boston FIT image source to its own filePaul Burton
Move the Boston board flattened image tree source into its own file which is concatenated into the final image tree source used to build the flattened image tree. Separating boards into different files will help us to avoid conflicts as boards are added. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16939/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Allow platform to specify multiple its.S filesPaul Burton
In preparation for splitting arch/mips/generic/vmlinux.its.S into multiple files such that it doesn't become a conflict magnet as boards are added, allow platforms to specify a list of image tree source files which will be concatenated to form the final source used to build the image tree. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16938/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Octeon: Expose support for mips32r1, mips32r2 and mips64r1Petar Jovanovic
Define Cavium Octeon as a CPU that has support for mips32r1, mips32r2 and mips64r1. This will affect show_cpuinfo() that will now correctly expose mips32r1, mips32r2 and mips64r1 as supported ISAs. Signed-off-by: Petar Jovanovic <petar.jovanovic@rt-rk.com> Reviewed-by: Maciej W. Rozycki <macro@imgtec.com> Acked-by: David Daney <david.daney@cavium.com> Cc: petar.jovanovic@imgtec.com Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15749/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: signal: Remove unreachable code from force_fcr31_sig().Ralf Baechle
Based on discussion with Linus remove the impossible to reach code rather than replacing it with a BUG(). Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Link: http://lkml.kernel.org/r/20170718140651.15973-4-ebiederm@xmission.com
2017-08-29MIPS: NI 169445 board supportNathan Sullivan
Support the National Instruments 169445 board. Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com> Acked-by: Rob Herring <robh@kernel.org> Cc: devicetree@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16782/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: pci-mt7620: explicitly request exclusive reset controlPhilipp Zabel
Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting reset lines") started to transition the reset control request API calls to explicitly state whether the driver needs exclusive or shared reset control behavior. Convert all drivers requesting exclusive resets to the explicit API call so the temporary transition helpers can be removed. No functional changes. Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16785/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: pistachio: Enable Root FS on NFS in defconfigMatt Redfearn
When the upstream kernel pistachio_defconfig is built & tested on the ci40 platform the current lack of these options leads to essentially false failures when the RFS fails to mount. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: James Hartley <james.hartley@sondrel.com> Cc: Ionela Voinescu <ionela.voinescu@imgtec.com> Cc: James Hartley <james.hartley@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16763/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: NUMA: Remove the unused parent_node() macroDou Liyang
Commit a7be6e5a7f8d ("mm: drop useless local parameters of __register_one_node()") removes the last user of parent_node(). The parent_node() macros in both IP27 and Loongson64 are unnecessary. Remove it for cleanup. Reported-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16873/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Octeon: cavium_octeon_defconfig: Enable more driversSteven J. Hill
Compile USB driver statically, enable EDAC driver, and remove deprecated options. Signed-off-by: Steven J. Hill <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16795/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Remove unused ST_OFF from r2300_switch.SPaul Burton
Commit 1a3d59579b9f ("MIPS: Tidy up FPU context switching") removed usage of ST_OFF, leaving it behind as dead code. Commit 828d1e4e9865 ("MIPS: Remove dead define of ST_OFF") then removed the definition of ST_OFF from r4k_switch.S as a cleanup. However the unused definition of ST_OFF has been left behind in r2300_switch.S. Remove it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16239/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Move r2300 FP code from r2300_switch.S to r2300_fpu.SPaul Burton
Move _save_fp(), _restore_fp() & _init_fpu() out of r2300_switch.S & into r2300_fpu.S. This logically places all FP-related asm code into r2300_fpu.S & provides consistency with R4K after the preceding commit. Besides cleaning up this will be useful for later patches which disable FP support. [ralf@linux-mips.org: Fixed build issues reported by Arnd Bergmann <arnd@arndb.de>] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16238/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Move r4k FP code from r4k_switch.S to r4k_fpu.SPaul Burton
Move _save_fp(), _restore_fp(), _save_msa(), _restore_msa(), _init_msa_upper() & _init_fpu() out of r4k_switch.S & into r4k_fpu.S. This allows us to clean up the way in which Octeon includes the default r4k implementations of these FP functions despite replacing resume(), and makes CONFIG_R4K_FPU more straightforwardly represent all configurations that have an R4K-style FPU, including Octeon. Besides cleaning up this will be useful for later patches which disable FP support. [ralf@linux-mips.org: Fixed build issues reported by Arnd Bergmann <arnd@arndb.de>] Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16237/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Remove unused R6000 supportPaul Burton
The kernel contains a small amount of incomplete code aimed at supporting old R6000 CPUs. This is: - Unused, as no machine selects CONFIG_SYS_HAS_CPU_R6000. - Broken, since there are glaring errors such as r6000_fpu.S moving the FCSR register to t1, then ignoring it & instead saving t0 into struct sigcontext... - A maintenance headache, since it's code that nobody can test which nevertheless imposes constraints on code which it shares with other machines. Remove this incomplete & broken R6000 CPU support in order to clean up and in preparation for changes which will no longer need to consider dragging the pretense of R6000 support along with them. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/16236/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: R6: Constify r2_decoder_tablesMatt Redfearn
The r2_decoder_tables are never modified. They are arrays of constant values and as such should be declared const. This change saves 256 bytes of kernel text, and 128 bytes of kernel data (384 bytes total) on a 32r6el_defconfig (with SMP disabled) Before: text data bss dec hex filename 5576221 1080804 267040 6924065 69a721 vmlinux After: text data bss dec hex filename 5575965 1080676 267040 6923681 69a5a1 vmlinux Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/15289/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: SMP: Constify smp opsMatt Redfearn
smp_ops providers do not modify their ops structures, so they should be made const for robustness. Since currently the MIPS kernel is not mapped with memory protection, this does not in itself provide any security benefit, but it still makes sense to make this change. There are also slight code size efficincies from the structure being made read-only, saving 128 bytes of kernel text on a pistachio_defconfig. Before: text data bss dec hex filename 7187239 1772752 470224 9430215 8fe4c7 vmlinux After: text data bss dec hex filename 7187111 1772752 470224 9430087 8fe447 vmlinux Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Doug Ledford <dledford@redhat.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Joe Perches <joe@perches.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Steven J. Hill <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16784/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: defconfig: Cleanup from non-existing optionsKrzysztof Kozlowski
Remove options which do not exist anymore: - CPU_FREQ_DEBUG is gone since commit 2d06d8c49afd ("[CPUFREQ] use dynamic debug instead of custom infrastructure"). - ECONET is gone since commit 349f29d841db ("econet: remove ancient bug ridden protocol"); - IPDDP_DECAP is gone since commit 9b5645b51384 ("appletalk: remove "config IPDDP_DECAP""); Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16770/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-08-29MIPS: Convert to using %pOF instead of full_nameRob Herring
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16783/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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