On Wed, Sep 12, 2007 at 10:21:53AM +0800, zhuzhenhua wrote: > i have a mips board, and the SDRAM speed(bus clock) is not too > fast. > so i want change the SAVE_ALL and RESTORE_ALL to use > internal-ram(high speed). > i just wonder whether the SAVE_ALL netsting in kernel for mips > arch? > if not, i think maybe 1k byte for SAVE_ALL is enough( 32regs > X4, and some cp0_regs). > but if the SAVE_ALL nesting, maybe i need to keep a stack in > internal-ram. > thanks for any hints． Nesting works but due to the use of k0/k1 you need to ensure SAVE_ALL is only invoked with interrupts disabled. Ralf
