From ec36599e62379bb43d164a039e1e5a5b17bc131c Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Wed, 7 Apr 2010 11:54:32 +0000
Subject: [PATCH] git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1857
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 os/ports/GCC/ARMCMx/chcore_v7m.c | 38 --------------------------------
 os/ports/GCC/ARMCMx/chcore_v7m.h |  3 +--
 readme.txt                       |  1 +
 3 files changed, 2 insertions(+), 40 deletions(-)

diff --git a/os/ports/GCC/ARMCMx/chcore_v7m.c b/os/ports/GCC/ARMCMx/chcore_v7m.c
index d199afdad..c8b2f3af6 100644
--- a/os/ports/GCC/ARMCMx/chcore_v7m.c
+++ b/os/ports/GCC/ARMCMx/chcore_v7m.c
@@ -53,43 +53,6 @@ void SysTickVector(void) {
   chSysUnlockFromIsr();
 }
 
-#if CORTEX_MODEL == CORTEX_M0
-#define PUSH_CONTEXT(sp, prio) {                                        \
-  asm volatile ("mrs     %0, PSP                                \n\t"   \
-                "sub     %0, %0, #40                            \n\t"   \
-                "stmia   %0!, {r3-r7}                           \n\t"   \
-                "sub     %0, %0, #20                            \n\t"   \
-                "mov     r3, r8                                 \n\t"   \
-                "str     r3, [%0, #20]                          \n\t"   \
-                "mov     r3, r9                                 \n\t"   \
-                "str     r3, [%0, #24]                          \n\t"   \
-                "mov     r3, r10                                \n\t"   \
-                "str     r3, [%0, #28]                          \n\t"   \
-                "mov     r3, r11                                \n\t"   \
-                "str     r3, [%0, #32]                          \n\t"   \
-                "mov     r3, lr                                 \n\t"   \
-                "str     r3, [%0, #36]                          \n\t"   \
-                : "=r" (sp) : "r" (sp), "r" (prio));                    \
-}
-
-#define POP_CONTEXT(sp) {                                               \
-  asm volatile ("ldr     r3, [%0, #20]                          \n\t"   \
-                "mov     r8, r3                                 \n\t"   \
-                "ldr     r3, [%0, #24]                          \n\t"   \
-                "mov     r9, r3                                 \n\t"   \
-                "ldr     r3, [%0, #28]                          \n\t"   \
-                "mov     r10, r3                                \n\t"   \
-                "ldr     r3, [%0, #32]                          \n\t"   \
-                "mov     r11, r3                                \n\t"   \
-                "ldr     r3, [%0, #36]                          \n\t"   \
-                "mov     lr, r3                                 \n\t"   \
-                "ldmia   %0!, {r3-r7}                           \n\t"   \
-                "add     %0, %0, #20                            \n\t"   \
-                "msr     PSP, %0                                \n\t"   \
-                "msr     BASEPRI, r3                            \n\t"   \
-                "bx      lr" : "=r" (sp) : "r" (sp));                   \
-}
-#else /* CORTEX_MODEL != CORTEX_M0 */
 #if !defined(CH_CURRP_REGISTER_CACHE)
 #define PUSH_CONTEXT(sp, prio) {                                        \
   asm volatile ("mrs     %0, PSP                                \n\t"   \
@@ -117,7 +80,6 @@ void SysTickVector(void) {
                 "bx      lr" : "=r" (sp) : "r" (sp));                   \
 }
 #endif /* defined(CH_CURRP_REGISTER_CACHE) */
-#endif /* CORTEX_MODEL != CORTEX_M0 */
 
 /**
  * @brief   SVC vector.
diff --git a/os/ports/GCC/ARMCMx/chcore_v7m.h b/os/ports/GCC/ARMCMx/chcore_v7m.h
index b575376ea..150fa41fa 100644
--- a/os/ports/GCC/ARMCMx/chcore_v7m.h
+++ b/os/ports/GCC/ARMCMx/chcore_v7m.h
@@ -263,7 +263,7 @@ struct intctx {
  * @param[in] ntp       the thread to be switched in
  * @param[in] otp       the thread to be switched out
  */
-static INLINE Thread *port_switch(Thread *ntp, Thread *otp) {
+static INLINE void port_switch(Thread *ntp, Thread *otp) {
   register Thread *_ntp asm ("r0") = (ntp);
   register Thread *_otp asm ("r1") = (otp);
 #if CH_DBG_ENABLE_STACK_CHECK
@@ -273,7 +273,6 @@ static INLINE Thread *port_switch(Thread *ntp, Thread *otp) {
                   "b       chDbgPanic");
 #endif /* CH_DBG_ENABLE_STACK_CHECK */
   asm volatile ("svc     #0" : : "r" (_otp), "r" (_ntp) : "memory");
-  return _otp;
 }
 
 #ifdef __cplusplus
diff --git a/readme.txt b/readme.txt
index e5f841b8d..f801c28a2 100644
--- a/readme.txt
+++ b/readme.txt
@@ -57,6 +57,7 @@
 *****************************************************************************
 
 *** 1.5.5 ***
+- FIX: Removed some "dead" code in the ARMv7-M files.
 - NEW: LPC13xx support, drivers (Serial, PAL, HAL) and demo.
 - CHANGE: Renamed LPC111x port and platform in LPC11xx.