Title: [9207] trunk/arch/blackfin: blackin: revert svn rev 8953
- Revision
- 9207
- Author
- vapier
- Date
- 2010-10-15 22:18:02 -0400 (Fri, 15 Oct 2010)
Log Message
blackin: revert svn rev 8953
binding L1 stack code to an unrelated Kconfig option (EXCEPTION_L1_SCRATCH) is not the way to go
Modified Paths
Diff
Modified: trunk/arch/blackfin/Kconfig (9206 => 9207)
--- trunk/arch/blackfin/Kconfig 2010-10-16 01:45:28 UTC (rev 9206)
+++ trunk/arch/blackfin/Kconfig 2010-10-16 02:18:02 UTC (rev 9207)
@@ -865,9 +865,19 @@
If you are using a processor affected by an anomaly, the build
system will double check for you and prevent it.
+config APP_STACK_L1
+ bool "Support locating application stack in L1 Scratch Memory"
+ default y
+ help
+ If enabled the application stack can be located in L1
+ scratch memory (less latency).
+
+ Currently only works with FLAT binaries.
+
config EXCEPTION_L1_SCRATCH
bool "Locate exception stack in L1 Scratch Memory"
default n
+ depends on !APP_STACK_L1
help
Whenever an exception occurs, use the L1 Scratch memory for
stack storage. You cannot place the stacks of FLAT binaries
Modified: trunk/arch/blackfin/include/asm/mmu_context.h (9206 => 9207)
--- trunk/arch/blackfin/include/asm/mmu_context.h 2010-10-16 01:45:28 UTC (rev 9206)
+++ trunk/arch/blackfin/include/asm/mmu_context.h 2010-10-16 02:18:02 UTC (rev 9207)
@@ -85,7 +85,7 @@
}
#endif
-#ifndef CONFIG_EXCEPTION_L1_SCRATCH
+#ifdef CONFIG_APP_STACK_L1
/* L1 stack switching. */
if (!next_mm->context.l1_stack_save)
return;
@@ -188,7 +188,7 @@
unsigned int cpu = smp_processor_id();
#endif
-#ifndef CONFIG_EXCEPTION_L1_SCRATCH
+#ifdef CONFIG_APP_STACK_L1
if (current_l1_stack_save == mm->context.l1_stack_save)
current_l1_stack_save = 0;
if (mm->context.l1_stack_save)
Modified: trunk/arch/blackfin/kernel/ptrace.c (9206 => 9207)
--- trunk/arch/blackfin/kernel/ptrace.c 2010-10-16 01:45:28 UTC (rev 9206)
+++ trunk/arch/blackfin/kernel/ptrace.c 2010-10-16 02:18:02 UTC (rev 9207)
@@ -136,7 +136,7 @@
if (start >= FIXED_CODE_START && start + len < FIXED_CODE_END)
return 0;
-#ifndef CONFIG_EXCEPTION_L1_SCRATCH
+#ifdef CONFIG_APP_STACK_L1
if (child->mm->context.l1_stack_save)
if (start >= (unsigned long)l1_stack_base &&
start + len < (unsigned long)l1_stack_base + l1_stack_len)
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