/* * Copyright 2015, Cyril Bur, IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include "basic_asm.h" #include "vsx_asm.h" #long check_vsx(vector int *r3); #This function wraps storeing VSX regs to the end of an array and a #call to a comparison function in C which boils down to a memcmp() FUNC_START(check_vsx) PUSH_BASIC_STACK(32) std r3,STACK_FRAME_PARAM(0)(sp) addi r3, r3, 16 * 12 #Second half of array bl store_vsx ld r3,STACK_FRAME_PARAM(0)(sp) bl vsx_memcmp POP_BASIC_STACK(32) blr FUNC_END(check_vsx) # int preempt_vmx(vector int *varray, int *threads_starting, # int *running); # On starting will (atomically) decrement threads_starting as a signal # that the VMX have been loaded with varray. Will proceed to check the # validity of the VMX registers while running is not zero. FUNC_START(preempt_vsx) PUSH_BASIC_STACK(512) std r3,STACK_FRAME_PARAM(0)(sp) # vector int *varray std r4,STACK_FRAME_PARAM(1)(sp) # int *threads_starting std r5,STACK_FRAME_PARAM(2)(sp) # int *running bl load_vsx nop sync # Atomic DEC ld r3,STACK_FRAME_PARAM(1)(sp) 1: lwarx r4,0,r3 addi r4,r4,-1 stwcx. r4,0,r3 bne- 1b 2: ld r3,STACK_FRAME_PARAM(0)(sp) bl check_vsx nop cmpdi r3,0 bne 3f ld r4,STACK_FRAME_PARAM(2)(sp) ld r5,0(r4) cmpwi r5,0 bne 2b 3: POP_BASIC_STACK(512) blr FUNC_END(preempt_vsx) ate-remove'>summaryrefslogtreecommitdiff
path: root/drivers/usb/serial/usb-serial.c
AgeCommit message (Expand)AuthorFilesLines