| 1 | /*
|
|---|
| 2 | * Copyright (c) 2007 Michal Kebrt
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | /** @addtogroup libcarm32
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | * @brief Fibrils related declarations.
|
|---|
| 34 | */
|
|---|
| 35 |
|
|---|
| 36 | #ifndef LIBC_arm32_FIBRIL_H_
|
|---|
| 37 | #define LIBC_arm32_FIBRIL_H_
|
|---|
| 38 |
|
|---|
| 39 | #include <sys/types.h>
|
|---|
| 40 | #include <align.h>
|
|---|
| 41 | #include <thread.h>
|
|---|
| 42 |
|
|---|
| 43 | /** Size of a stack item */
|
|---|
| 44 | #define STACK_ITEM_SIZE 4
|
|---|
| 45 |
|
|---|
| 46 | /** Stack alignment - see <a href="http://www.arm.com/support/faqdev/14269.html">ABI</a> for details */
|
|---|
| 47 | #define STACK_ALIGNMENT 8
|
|---|
| 48 |
|
|---|
| 49 | #define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT))
|
|---|
| 50 |
|
|---|
| 51 |
|
|---|
| 52 | /** Sets data to the context.
|
|---|
| 53 | *
|
|---|
| 54 | * @param c Context (#context_t).
|
|---|
| 55 | * @param _pc Program counter.
|
|---|
| 56 | * @param stack Stack address.
|
|---|
| 57 | * @param size Stack size.
|
|---|
| 58 | * @param ptls Pointer to the TCB.
|
|---|
| 59 | */
|
|---|
| 60 | #define context_set(c, _pc, stack, size, ptls) \
|
|---|
| 61 | (c)->pc = (sysarg_t) (_pc); \
|
|---|
| 62 | (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA; \
|
|---|
| 63 | (c)->tls = ((sysarg_t)(ptls)) + sizeof(tcb_t) + ARM_TP_OFFSET;
|
|---|
| 64 |
|
|---|
| 65 |
|
|---|
| 66 | /** Fibril context.
|
|---|
| 67 | *
|
|---|
| 68 | * Only registers preserved accross function calls are included. r9 is used
|
|---|
| 69 | * to store a TLS address. -ffixed-r9 gcc forces gcc not to use this
|
|---|
| 70 | * register. -mtp=soft forces gcc to use #__aeabi_read_tp to obtain
|
|---|
| 71 | * TLS address.
|
|---|
| 72 | */
|
|---|
| 73 | typedef struct {
|
|---|
| 74 | uint32_t sp;
|
|---|
| 75 | uint32_t pc;
|
|---|
| 76 | uint32_t r4;
|
|---|
| 77 | uint32_t r5;
|
|---|
| 78 | uint32_t r6;
|
|---|
| 79 | uint32_t r7;
|
|---|
| 80 | uint32_t r8;
|
|---|
| 81 | uint32_t tls;
|
|---|
| 82 | uint32_t r10;
|
|---|
| 83 | uint32_t r11;
|
|---|
| 84 | } context_t;
|
|---|
| 85 |
|
|---|
| 86 |
|
|---|
| 87 | #endif
|
|---|
| 88 |
|
|---|
| 89 | /** @}
|
|---|
| 90 | */
|
|---|
