diff options
author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-03-20 18:22:21 +0000 |
---|---|---|
committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-03-20 18:22:21 +0000 |
commit | fce497aecaf6826d6fec3cfcb761abeac7fe72bf (patch) | |
tree | 6d2f0d4610067c2b0e4c3f831274037c9ceba91a /nuttx/arch/arm/src/common/up_createstack.c | |
parent | 3d7ed16eabcbea16723b66df2cd2a7d10ba22474 (diff) | |
download | px4-nuttx-fce497aecaf6826d6fec3cfcb761abeac7fe72bf.tar.gz px4-nuttx-fce497aecaf6826d6fec3cfcb761abeac7fe72bf.tar.bz2 px4-nuttx-fce497aecaf6826d6fec3cfcb761abeac7fe72bf.zip |
Change prototypes of up_create_stack and up_release_stack to include a task type parameter
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5765 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/common/up_createstack.c')
-rw-r--r-- | nuttx/arch/arm/src/common/up_createstack.c | 40 |
1 files changed, 28 insertions, 12 deletions
diff --git a/nuttx/arch/arm/src/common/up_createstack.c b/nuttx/arch/arm/src/common/up_createstack.c index efa0e0a15..65eb91159 100644 --- a/nuttx/arch/arm/src/common/up_createstack.c +++ b/nuttx/arch/arm/src/common/up_createstack.c @@ -1,7 +1,7 @@ /**************************************************************************** * arch/arm/src/common/up_createstack.c * - * Copyright (C) 2007-2012 Gregory Nutt. All rights reserved. + * Copyright (C) 2007-2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without @@ -111,24 +111,40 @@ static void *memset32(void *s, uint32_t c, size_t n) * Name: up_create_stack * * Description: - * Allocate a stack for a new thread and setup up stack-related - * information in the TCB. + * Allocate a stack for a new thread and setup up stack-related information + * in the TCB. * - * The following TCB fields must be initialized: - * adj_stack_size: Stack size after adjustment for hardware, processor, + * The following TCB fields must be initialized by this function: + * + * - adj_stack_size: Stack size after adjustment for hardware, processor, * etc. This value is retained only for debug purposes. - * stack_alloc_ptr: Pointer to allocated stack - * adj_stack_ptr: Adjusted stack_alloc_ptr for HW. The initial value of + * - stack_alloc_ptr: Pointer to allocated stack + * - adj_stack_ptr: Adjusted stack_alloc_ptr for HW. The initial value of * the stack pointer. * - * Input Parameters: - * tcb: The TCB of new task - * stack_size: The requested stack size. At least this how much must be - * allocated. + * Inputs: + * - tcb: The TCB of new task + * - stack_size: The requested stack size. At least this much + * must be allocated. + * - ttype: The thread type. This may be one of following (defined in + * include/nuttx/sched.h): + * + * TCB_FLAG_TTYPE_TASK Normal user task + * TCB_FLAG_TTYPE_PTHREAD User pthread + * TCB_FLAG_TTYPE_KERNEL Kernel thread + * + * This thread type is normally available in the flags field of the TCB, + * however, there are certain contexts where the TCB may not be fully + * initialized when up_create_stack is called. + * + * If CONFIG_NUTTX_KERNEL is defined, then this thread type may affect + * how the stack is allocated. For example, kernel thread stacks should + * be allocated from protected kernel memory. Stacks for user tasks and + * threads must come from memory that is accessible to user code. * ****************************************************************************/ -int up_create_stack(struct tcb_s *tcb, size_t stack_size) +int up_create_stack(FAR struct tcb_s *tcb, size_t stack_size, uint8_t ttype) { /* Is there already a stack allocated of a different size? */ |