diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/blackfin/Kconfig | 11 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 21 |
2 files changed, 26 insertions, 6 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index ac76baac1df..e37e993431b 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -667,6 +667,17 @@ config APP_STACK_L1 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 && !SYSCALL_TAB_L1 + help + Whenever an exception occurs, use the L1 Scratch memory for + stack storage. You cannot place the stacks of FLAT binaries + in L1 when using this option. + + If you don't use L1 Scratch, then you should say Y here. + comment "Speed Optimizations" config BFIN_INS_LOWOVERHEAD bool "ins[bwl] low overhead, higher interrupt latency" diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index bde6dc4e261..ad404988229 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -1539,14 +1539,23 @@ ENTRY(_sys_call_table) .endr END(_sys_call_table) -_exception_stack: - .rept 1024 - .long 0; - .endr -_exception_stack_top: - #if ANOMALY_05000261 /* Used by the assembly entry point to work around an anomaly. */ _last_cplb_fault_retx: .long 0; #endif + +#ifdef CONFIG_EXCEPTION_L1_SCRATCH +/* .section .l1.bss.scratch */ +.set _exception_stack_top, L1_SCRATCH_START + L1_SCRATCH_LENGTH +#else +#ifdef CONFIG_SYSCALL_TAB_L1 +.section .l1.bss +#else +.bss +#endif +_exception_stack: +.size _exception_stack, 1024 * 4 +.set _exception_stack_top, _exception_stack + 1024 * 4 +.size _exception_stack_top, 0 +#endif |