diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mm/proc-xscale.S | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S index 2d977b4eeea..b88de270014 100644 --- a/arch/arm/mm/proc-xscale.S +++ b/arch/arm/mm/proc-xscale.S @@ -370,142 +370,6 @@ ENTRY(cpu_xscale_dcache_clean_area) bhi 1b mov pc, lr -/* ================================ CACHE LOCKING============================ - * - * The XScale MicroArchitecture implements support for locking entries into - * the data and instruction cache. The following functions implement the core - * low level instructions needed to accomplish the locking. The developer's - * manual states that the code that performs the locking must be in non-cached - * memory. To accomplish this, the code in xscale-cache-lock.c copies the - * following functions from the cache into a non-cached memory region that - * is allocated through consistent_alloc(). - * - */ - .align 5 -/* - * xscale_icache_lock - * - * r0: starting address to lock - * r1: end address to lock - */ -ENTRY(xscale_icache_lock) - -iLockLoop: - bic r0, r0, #CACHELINESIZE - 1 - mcr p15, 0, r0, c9, c1, 0 @ lock into cache - cmp r0, r1 @ are we done? - add r0, r0, #CACHELINESIZE @ advance to next cache line - bls iLockLoop - mov pc, lr - -/* - * xscale_icache_unlock - */ -ENTRY(xscale_icache_unlock) - mcr p15, 0, r0, c9, c1, 1 @ Unlock icache - mov pc, lr - -/* - * xscale_dcache_lock - * - * r0: starting address to lock - * r1: end address to lock - */ -ENTRY(xscale_dcache_lock) - mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer - mov r2, #1 - mcr p15, 0, r2, c9, c2, 0 @ Put dcache in lock mode - cpwait ip @ Wait for completion - - mrs r2, cpsr - orr r3, r2, #PSR_F_BIT | PSR_I_BIT -dLockLoop: - msr cpsr_c, r3 - mcr p15, 0, r0, c7, c10, 1 @ Write back line if it is dirty - mcr p15, 0, r0, c7, c6, 1 @ Flush/invalidate line - msr cpsr_c, r2 - ldr ip, [r0], #CACHELINESIZE @ Preload 32 bytes into cache from - @ location [r0]. Post-increment - @ r3 to next cache line - cmp r0, r1 @ Are we done? - bls dLockLoop - - mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer - mov r2, #0 - mcr p15, 0, r2, c9, c2, 0 @ Get out of lock mode - cpwait_ret lr, ip - -/* - * xscale_dcache_unlock - */ -ENTRY(xscale_dcache_unlock) - mcr p15, 0, ip, c7, c10, 4 @ Drain Write (& Fill) Buffer - mcr p15, 0, ip, c9, c2, 1 @ Unlock cache - mov pc, lr - -/* - * Needed to determine the length of the code that needs to be copied. - */ - .align 5 -ENTRY(xscale_cache_dummy) - mov pc, lr - -/* ================================ TLB LOCKING============================== - * - * The XScale MicroArchitecture implements support for locking entries into - * the Instruction and Data TLBs. The following functions provide the - * low level support for supporting these under Linux. xscale-lock.c - * implements some higher level management code. Most of the following - * is taken straight out of the Developer's Manual. - */ - -/* - * Lock I-TLB entry - * - * r0: Virtual address to translate and lock - */ - .align 5 -ENTRY(xscale_itlb_lock) - mrs r2, cpsr - orr r3, r2, #PSR_F_BIT | PSR_I_BIT - msr cpsr_c, r3 @ Disable interrupts - mcr p15, 0, r0, c8, c5, 1 @ Invalidate I-TLB entry - mcr p15, 0, r0, c10, c4, 0 @ Translate and lock - msr cpsr_c, r2 @ Restore interrupts - cpwait_ret lr, ip - -/* - * Lock D-TLB entry - * - * r0: Virtual address to translate and lock - */ - .align 5 -ENTRY(xscale_dtlb_lock) - mrs r2, cpsr - orr r3, r2, #PSR_F_BIT | PSR_I_BIT - msr cpsr_c, r3 @ Disable interrupts - mcr p15, 0, r0, c8, c6, 1 @ Invalidate D-TLB entry - mcr p15, 0, r0, c10, c8, 0 @ Translate and lock - msr cpsr_c, r2 @ Restore interrupts - cpwait_ret lr, ip - -/* - * Unlock all I-TLB entries - */ - .align 5 -ENTRY(xscale_itlb_unlock) - mcr p15, 0, ip, c10, c4, 1 @ Unlock I-TLB - mcr p15, 0, ip, c8, c5, 0 @ Invalidate I-TLB - cpwait_ret lr, ip - -/* - * Unlock all D-TLB entries - */ -ENTRY(xscale_dtlb_unlock) - mcr p15, 0, ip, c10, c8, 1 @ Unlock D-TBL - mcr p15, 0, ip, c8, c6, 0 @ Invalidate D-TLB - cpwait_ret lr, ip - /* =============================== PageTable ============================== */ #define PTE_CACHE_WRITE_ALLOCATE 0 |