/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1998, 1999, 2003 by Ralf Baechle * Copyright (C) 2014 by Maciej W. Rozycki */ #ifndef _ASM_TIMEX_H #define _ASM_TIMEX_H #ifdef __KERNEL__ #include #include #include #include #include /* * This is the clock rate of the i8253 PIT. A MIPS system may not have * a PIT by the symbol is used all over the kernel including some APIs. * So keeping it defined to the number for the PIT is the only sane thing * for now. */ #define CLOCK_TICK_RATE 1193182 /* * Standard way to access the cycle counter. * Currently only used on SMP for scheduling. * * Only the low 32 bits are available as a continuously counting entity. * But this only means we'll force a reschedule every 8 seconds or so, * which isn't an evil thing. * * We know that all SMP capable CPUs have cycle counters. */ typedef unsigned int cycles_t; /* * On R4000/R4400 before version 5.0 an erratum exists such that if the * cycle counter is read in the exact moment that it is matching the * compare register, no interrupt will be generated. * * There is a suggested workaround and also the erratum can't strike if * the compare interrupt isn't being used as the clock source device. * However for now the implementaton of this function doesn't get these * fine details right. */ static inline int can_use_mips_counter(unsigned int prid) { int comp = (prid & PRID_COMP_MASK) != PRID_COMP_LEGACY; if (__builtin_constant_p(cpu_has_counter) && !cpu_has_counter) return 0; else if (__builtin_constant_p(cpu_has_mips_r) && cpu_has_mips_r) return 1; else if (likely(!__builtin_constant_p(cpu_has_mips_r) && comp)) return 1; /* Make sure we don't peek at cpu_data[0].options in the fast path! */ if (!__builtin_constant_p(cpu_has_counter)) asm volatile("" : "=m" (cpu_data[0].options)); if (likely(cpu_has_counter && prid >= (PRID_IMP_R4000 | PRID_REV_ENCODE_44(5, 0)))) return 1; else return 0; } static inline cycles_t get_cycles(void) { if (can_use_mips_counter(read_c0_prid())) return read_c0_count(); else return 0; /* no usable counter */ } /* * Like get_cycles - but where c0_count is not available we desperately * use c0_random in an attempt to get at least a little bit of entropy. * * R6000 and R6000A neither have a count register nor a random register. * That leaves no entropy source in the CPU itself. */ static inline unsigned long random_get_entropy(void) { unsigned int prid = read_c0_prid(); unsigned int imp = prid & PRID_IMP_MASK; if (can_use_mips_counter(prid)) return read_c0_count(); else if (likely(imp != PRID_IMP_R6000 && imp != PRID_IMP_R6000A)) return read_c0_random(); else return 0; /* no usable register */ } #define random_get_entropy random_get_entropy #endif /* __KERNEL__ */ #endif /* _ASM_TIMEX_H */ ommit/arch/mips/ralink?id=5db4992d8f040b8d8db0b86d42806e0c417f7ccf'>ralink/Kconfig
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authorTobias Klauser <tklauser@distanz.ch>2016-10-20 15:44:19 +0200
committerTobias Klauser <tklauser@distanz.ch>2017-02-15 10:34:18 +0100
commit5db4992d8f040b8d8db0b86d42806e0c417f7ccf (patch)
tree5b06e952af482d45f3ade64e77824662e34b7fa2 /arch/mips/ralink/Kconfig
parent370ebb0ef6255132373ed35d13e7b1d8d2eb7003 (diff)
usbnet: pegasus: Use net_device_stats from struct net_devicends-private-remove
Instead of using a private copy of struct net_device_stats in struct pegasus, use stats from struct net_device. Also remove the now unnecessary .ndo_get_stats function. Cc: Petko Manolov <petkan@nucleusys.com> Cc: linux-usb@vger.kernel.org Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'arch/mips/ralink/Kconfig')