diff --git a/arch/arm/cpu/cache-armv7.S b/arch/arm/cpu/cache-armv7.S index 5595cf6..c19618b 100644 --- a/arch/arm/cpu/cache-armv7.S +++ b/arch/arm/cpu/cache-armv7.S @@ -56,8 +56,18 @@ ldmfd sp!, {r4-r12, pc} ENDPROC(v7_mmu_cache_off) -.section .text.v7_mmu_cache_flush +.section .text.v7_mmu_cache_flush_invalidate +ENTRY(v7_mmu_cache_invalidate) + mov r0, #1 + b __v7_mmu_cache_flush_invalidate +ENDPROC(v7_mmu_cache_invalidate) + ENTRY(v7_mmu_cache_flush) + mov r0, #0 + b __v7_mmu_cache_flush_invalidate +ENDPROC(v7_mmu_cache_flush) + +ENTRY(__v7_mmu_cache_flush_invalidate) mrc p15, 0, r12, c0, c1, 5 @ read ID_MMFR1 tst r12, #0xf << 16 @ hierarchical cache (ARMv7) mov r12, #0 @@ -65,7 +75,8 @@ mcr p15, 0, r12, c7, c14, 0 @ clean+invalidate D b iflush hierarchical: - stmfd sp!, {r4-r7, r9-r11} + stmfd sp!, {r4-r11} + mov r8, r0 mcr p15, 0, r12, c7, c10, 5 @ DMB mrc p15, 1, r0, c0, c0, 1 @ read clidr ands r3, r0, #0x7000000 @ extract loc from clidr @@ -97,7 +108,10 @@ THUMB( orr r11, r12, r6 ) @ factor way and cache number into r11 THUMB( lsl r6, r7, r2 ) THUMB( orr r11, r11, r6 ) @ factor index number into r11 - mcr p15, 0, r11, c7, c14, 2 @ clean & invalidate by set/way + cmp r8, #0 +THUMB( ite eq ) + mcreq p15, 0, r11, c7, c14, 2 @ clean & invalidate by set/way + mcrne p15, 0, r11, c7, c6, 2 @ invalidate by set/way subs r9, r9, #1 @ decrement the way bge loop3 subs r7, r7, #1 @ decrement the index @@ -107,7 +121,7 @@ cmp r3, r12 bgt loop1 finished: - ldmfd sp!, {r4-r7, r9-r11} + ldmfd sp!, {r4-r11} mov r12, #0 @ switch back to cache level 0 mcr p15, 2, r12, c0, c0, 0 @ select current cache level in cssr iflush: @@ -116,7 +130,7 @@ mcr p15, 0, r12, c7, c10, 4 @ DSB mcr p15, 0, r12, c7, c5, 4 @ ISB mov pc, lr -ENDPROC(v7_mmu_cache_flush) +ENDPROC(__v7_mmu_cache_flush_invalidate) /* * cache_line_size - get the cache line size from the CSIDR register