Changeset 6b781c0 in mainline for uspace/libc/arch/arm32/include/psthread.h

Timestamp:

2007-06-08T15:02:49Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c03ee1c

Parents:

3ee8a075

Message:

Merge arm32 into trunk.

File:

• uspace/libc/arch/arm32/include/psthread.h (modified) (3 diffs)

uspace/libc/arch/arm32/include/psthread.h

@@ -1 +1 @@
 /*
- * Copyright (c) 2006 Ondrej Palkovsky
+ * Copyright (c) 2007 Michal Kebrt
  * All rights reserved.
  *
@@ -30 +30 @@
  * @{
  */
-/** @file
- * @ingroup libcarm32   
+/** @file 
+ *  @brief psthread related declarations.
  */
 
@@ -38 +38 @@
 
 #include <types.h>
+#include <align.h>
+#include "thread.h"
 
-#define SP_DELTA        0       /* TODO */
+/** Size of a stack item */
+#define STACK_ITEM_SIZE         4
 
+/** Stack alignment - see <a href="http://www.arm.com/support/faqdev/14269.html">ABI</a> for details */
+#define STACK_ALIGNMENT         8
+
+#define SP_DELTA        (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT))
+
+
+/** Sets data to the context. 
+ *  
+ *  @param c     Context (#context_t).
+ *  @param _pc   Program counter.
+ *  @param stack Stack address.
+ *  @param size  Stack size.
+ *  @param ptls  Pointer to the TCB.
+ */
+#define context_set(c, _pc, stack, size, ptls)                  \
+        (c)->pc = (sysarg_t) (_pc);                             \
+        (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA;     \
+        (c)->tls = ((sysarg_t)(ptls)) + sizeof(tcb_t) + ARM_TP_OFFSET;
+
+
+/** Thread context. 
+ *
+ *  Only registers preserved accross function calls are included. r9 is used 
+ *  to store a TLS address. -ffixed-r9 gcc forces gcc not to use this
+ *  register. -mtp=soft forces gcc to use #__aeabi_read_tp to obtain
+ *  TLS address.
+ */
 typedef struct  {
         uint32_t sp;
         uint32_t pc;
+        uint32_t r4;
+        uint32_t r5;
+        uint32_t r6;
+        uint32_t r7;
+        uint32_t r8;
         uint32_t tls;
+        uint32_t r10;
+        uint32_t r11;
 } context_t;
+
 
 #endif