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Problem disabling cache on ARM926ej-s

aleksa
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  • Note: This was originally posted on 17th March 2011 at http://forums.arm.com

    I've copied (almost) this from linux, and it still doesn't work.



    disablecache:   mrc p15, 0, r15, c7, c14, 3  @ test, clean and invalidate
                    bne DisableCache

                    mov r0,#0
                    mcr p15, 0, r0, c7, c5, 0    @ invalidate I cache
                    mcr p15, 0, r0, c7, c10, 4      @ drain write buffer

                    mrc p15, 0, r0, c1, c0, 0    @ Disable Icache(12), Dcache(2) and MMU(0)
                    bic r0, r0, #4096
                    bic r0, r0, #5
                    mcr p15, 0, r0, c1, c0, 0

                    mov pc,lr
Reply
  • Note: This was originally posted on 17th March 2011 at http://forums.arm.com

    I've copied (almost) this from linux, and it still doesn't work.



    disablecache:   mrc p15, 0, r15, c7, c14, 3  @ test, clean and invalidate
                    bne DisableCache

                    mov r0,#0
                    mcr p15, 0, r0, c7, c5, 0    @ invalidate I cache
                    mcr p15, 0, r0, c7, c10, 4      @ drain write buffer

                    mrc p15, 0, r0, c1, c0, 0    @ Disable Icache(12), Dcache(2) and MMU(0)
                    bic r0, r0, #4096
                    bic r0, r0, #5
                    mcr p15, 0, r0, c1, c0, 0

                    mov pc,lr
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