Fixed bug #706.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8874 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/nil/ports/ARMCMx/compilers/GCC/nilcoreasm_v7m.s

@@ -64,8 +64,18 @@ _port_switch:
 #if CORTEX_USE_FPU
                 vpush   {s16-s31}
 #endif
+
                 str     sp, [r1, #CONTEXT_OFFSET]
+#if (CORTEX_SIMPLIFIED_PRIORITY == FALSE) &&                                \
+    ((CORTEX_MODEL == 3) || (CORTEX_MODEL == 4))
+                /* Workaround for ARM errata 752419, only applied if
+                   condition exists for it to be triggered.*/
+                ldr     r3, [r0, #CONTEXT_OFFSET]
+                mov     sp, r3
+#else
                 ldr     sp, [r0, #CONTEXT_OFFSET]
+#endif
+
 #if CORTEX_USE_FPU
                 vpop    {s16-s31}
 #endif

os/rt/ports/ARMCMx/compilers/GCC/chcoreasm_v7m.s

@@ -64,8 +64,18 @@ _port_switch:
 #if CORTEX_USE_FPU
                 vpush   {s16-s31}
 #endif
+
                 str     sp, [r1, #CONTEXT_OFFSET]
+#if (CORTEX_SIMPLIFIED_PRIORITY == FALSE) &&                                \
+    ((CORTEX_MODEL == 3) || (CORTEX_MODEL == 4))
+                /* Workaround for ARM errata 752419, only applied if
+                   condition exists for it to be triggered.*/
+                ldr     r3, [r0, #CONTEXT_OFFSET]
+                mov     sp, r3
+#else
                 ldr     sp, [r0, #CONTEXT_OFFSET]
+#endif
+
 #if CORTEX_USE_FPU
                 vpop    {s16-s31}
 #endif

os/rt/ports/ARMCMx/compilers/IAR/chcoreasm_v7m.s

@@ -72,8 +72,18 @@ _port_switch:
 #if CORTEX_USE_FPU
                 vpush   {s16-s31}
 #endif
+
                 str     sp, [r1, #CONTEXT_OFFSET]
+#if (CORTEX_SIMPLIFIED_PRIORITY == FALSE) &&                                \
+    ((CORTEX_MODEL == 3) || (CORTEX_MODEL == 4))
+                /* Workaround for ARM errata 752419, only applied if
+                   condition exists for it to be triggered.*/
+                ldr     r3, [r0, #CONTEXT_OFFSET]
+                mov     sp, r3
+#else
                 ldr     sp, [r0, #CONTEXT_OFFSET]
+#endif
+
 #if CORTEX_USE_FPU
                 vpop    {s16-s31}
 #endif

os/rt/ports/ARMCMx/compilers/RVCT/chcoreasm_v7m.s

@@ -67,8 +67,18 @@ _port_switch    PROC
 #if CORTEX_USE_FPU
                 vpush   {s16-s31}
 #endif
+
                 str     sp, [r1, #CONTEXT_OFFSET]
+#if (CORTEX_SIMPLIFIED_PRIORITY == FALSE) &&                                \
+    ((CORTEX_MODEL == 3) || (CORTEX_MODEL == 4))
+                /* Workaround for ARM errata 752419, only applied if
+                   condition exists for it to be triggered.*/
+                ldr     r3, [r0, #CONTEXT_OFFSET]
+                mov     sp, r3
+#else
                 ldr     sp, [r0, #CONTEXT_OFFSET]
+#endif
+
 #if CORTEX_USE_FPU
                 vpop    {s16-s31}
 #endif

readme.txt

@@ -76,6 +76,10 @@
 - RT:  Removed the p_msg field from the thread_t structure saving a
        msg_t-sized field from the structure. Messages now use a new field
        into the p_u union. Now synchronous messages are even faster.
+- NIL: Fixed ARM errata 752419 (bug #706)(backported to 2.6.10,
+       3.0.6 and 16.1.4).
+- RT:  Fixed ARM errata 752419 (bug #706)(backported to 2.6.10,
+       3.0.6 and 16.1.4).
 - HAL: Fixed unused variable in STM32 SPIv2 driver (bug #705)(backported
        to 16.1.3).
 - HAL: Fixed chDbgAssert() still called from STM32 SPIv1 driver (bug #704)