From b8335062ae7d19bd27e6131fadcd7d3a116c4992 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Fri, 11 Mar 2011 01:28:00 +0000 Subject: DimOS RT --- kernel/stack.h | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 kernel/stack.h (limited to 'kernel/stack.h') diff --git a/kernel/stack.h b/kernel/stack.h new file mode 100644 index 0000000..0f44954 --- /dev/null +++ b/kernel/stack.h @@ -0,0 +1,99 @@ +/* $Id$ */ +/* + * Copyright (c) 2010 Dimitri Sokolyuk + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef __STACK_H +#define __STACK_H + +/* average latency in cycles */ +#define LATENCY 72 + +/* 68 cycles */ +#define PUSH_ALL() asm volatile ( \ + "push r1 \n" \ + "push r0 \n" \ + "in r0, __SREG__ \n" \ + "push r0 \n" \ + "eor r1, r1 \n" \ + "push r2 \n" \ + "push r3 \n" \ + "push r4 \n" \ + "push r5 \n" \ + "push r6 \n" \ + "push r7 \n" \ + "push r8 \n" \ + "push r9 \n" \ + "push r10 \n" \ + "push r11 \n" \ + "push r12 \n" \ + "push r13 \n" \ + "push r14 \n" \ + "push r15 \n" \ + "push r16 \n" \ + "push r17 \n" \ + "push r18 \n" \ + "push r19 \n" \ + "push r20 \n" \ + "push r21 \n" \ + "push r22 \n" \ + "push r23 \n" \ + "push r24 \n" \ + "push r25 \n" \ + "push r26 \n" \ + "push r27 \n" \ + "push r28 \n" \ + "push r29 \n" \ + "push r30 \n" \ + "push r31 \n" ) + +/* 69 cycles */ +#define POP_ALL() asm volatile ( \ + "pop r31 \n" \ + "pop r30 \n" \ + "pop r29 \n" \ + "pop r28 \n" \ + "pop r27 \n" \ + "pop r26 \n" \ + "pop r25 \n" \ + "pop r24 \n" \ + "pop r23 \n" \ + "pop r22 \n" \ + "pop r21 \n" \ + "pop r20 \n" \ + "pop r19 \n" \ + "pop r18 \n" \ + "pop r17 \n" \ + "pop r16 \n" \ + "pop r15 \n" \ + "pop r14 \n" \ + "pop r13 \n" \ + "pop r12 \n" \ + "pop r11 \n" \ + "pop r10 \n" \ + "pop r9 \n" \ + "pop r8 \n" \ + "pop r7 \n" \ + "pop r6 \n" \ + "pop r5 \n" \ + "pop r4 \n" \ + "pop r3 \n" \ + "pop r2 \n" \ + "pop r0 \n" \ + "out __SREG__, r0 \n" \ + "pop r0 \n" \ + "pop r1 \n" ) + +#endif -- cgit v1.2.3