From: Tony Lindgren Date: Tue, 19 Jan 2010 16:01:33 +0000 (+0100) Subject: ARM: 5886/1: arm: Fix cpu_proc_fin() for proc-v7.S and make kexec work X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f667c690be3ab71036c436d8391105eee23f65b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ARM: 5886/1: arm: Fix cpu_proc_fin() for proc-v7.S and make kexec work The comments in arm_machine_restart() suggest that cpu_proc_fin() will clean and disable cache and turn off interrupts. This does not seem to be implemented for proc-v7.S, implement it the same way as for proc-v6.S. This also makes kexec work for v7. Note that a related TLB and branch traget flush patch is also needed to avoid kexec "crc error". Note that there are still some issues that seem to be related to L2 cache being on and causing occasional uncompress "crc error" with kexec. Anyways, this gets kexec mostly working on V7 for now. Signed-off-by: Tony Lindgren Signed-off-by: Russell King --- diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index 3a285218fd15..d2a80747c6fe 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -45,7 +45,14 @@ ENTRY(cpu_v7_proc_init) ENDPROC(cpu_v7_proc_init) ENTRY(cpu_v7_proc_fin) - mov pc, lr + stmfd sp!, {lr} + cpsid if @ disable interrupts + bl v7_flush_kern_cache_all + mrc p15, 0, r0, c1, c0, 0 @ ctrl register + bic r0, r0, #0x1000 @ ...i............ + bic r0, r0, #0x0006 @ .............ca. + mcr p15, 0, r0, c1, c0, 0 @ disable caches + ldmfd sp!, {pc} ENDPROC(cpu_v7_proc_fin) /*