diff options
Diffstat (limited to 'arch/blackfin/Kconfig')
| -rw-r--r-- | arch/blackfin/Kconfig | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index cdce8cc5b7b3..26ebb0e8c431 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -521,6 +521,52 @@ config BFIN_IDLE_LED_NUM help Select the LED (marked on the board) for you to blink. +choice + prompt "Blackfin Exception Scratch Register" + default BFIN_SCRATCH_REG_RETN + help + Select the resource to reserve for the Exception handler: + - RETN: Non-Maskable Interrupt (NMI) + - RETE: Exception Return (JTAG/ICE) + - CYCLES: Performance counter + + If you are unsure, please select "RETN". + +config BFIN_SCRATCH_REG_RETN + bool "RETN" + help + Use the RETN register in the Blackfin exception handler + as a stack scratch register. This means you cannot + safely use NMI on the Blackfin while running Linux, but + you can debug the system with a JTAG ICE and use the + CYCLES performance registers. + + If you are unsure, please select "RETN". + +config BFIN_SCRATCH_REG_RETE + bool "RETE" + help + Use the RETE register in the Blackfin exception handler + as a stack scratch register. This means you cannot + safely use a JTAG ICE while debugging a Blackfin board, + but you can safely use the CYCLES performance registers + and the NMI. + + If you are unsure, please select "RETN". + +config BFIN_SCRATCH_REG_CYCLES + bool "CYCLES" + help + Use the CYCLES register in the Blackfin exception handler + as a stack scratch register. This means you cannot + safely use the CYCLES performance registers on a Blackfin + board at anytime, but you can debug the system with a JTAG + ICE and use the NMI. + + If you are unsure, please select "RETN". + +endchoice + # # Sorry - but you need to put the hex address here - # |