From 027f3f96962df3a222c11dace0d1ff266d836371 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 11 Mar 2014 17:41:33 +0100 Subject: ARM: cache-tauros2: remove ARMv6 code When building a kernel with support for both ARMv6 and ARMv7 but no MMU, the call from tauros2_internal_init to adjust_cr causes a link error. While that could probably be resolved, we don't actually support cache-tauros2 on ARMv6 any more. All PJ4 CPU implementations support both ARMv6 and ARMv7 and we already assume that we are using them only in ARMv7 mode. Removing the ARMv6 code path reduces the code size and avoids the linker error. Signed-off-by: Arnd Bergmann Acked-by: Haojian Zhuang --- arch/arm/mm/cache-tauros2.c | 29 +---------------------------- 1 file changed, 1 insertion(+), 28 deletions(-) diff --git a/arch/arm/mm/cache-tauros2.c b/arch/arm/mm/cache-tauros2.c index 1be0f4e5e6eb..b273739e6359 100644 --- a/arch/arm/mm/cache-tauros2.c +++ b/arch/arm/mm/cache-tauros2.c @@ -33,7 +33,7 @@ * outer cache operations into the kernel image if the kernel has been * configured to support a pre-v7 CPU. */ -#if __LINUX_ARM_ARCH__ < 7 +#ifdef CONFIG_CPU_32v5 /* * Low-level cache maintenance operations. */ @@ -229,33 +229,6 @@ static void __init tauros2_internal_init(unsigned int features) } #endif -#ifdef CONFIG_CPU_32v6 - /* - * Check whether this CPU lacks support for the v7 hierarchical - * cache ops. (PJ4 is in its v6 personality mode if the MMFR3 - * register indicates no support for the v7 hierarchical cache - * ops.) - */ - if (cpuid_scheme() && (read_mmfr3() & 0xf) == 0) { - /* - * When Tauros2 is used in an ARMv6 system, the L2 - * enable bit is in the ARMv6 ARM-mandated position - * (bit [26] of the System Control Register). - */ - if (!(get_cr() & 0x04000000)) { - printk(KERN_INFO "Tauros2: Enabling L2 cache.\n"); - adjust_cr(0x04000000, 0x04000000); - } - - mode = "ARMv6"; - outer_cache.inv_range = tauros2_inv_range; - outer_cache.clean_range = tauros2_clean_range; - outer_cache.flush_range = tauros2_flush_range; - outer_cache.disable = tauros2_disable; - outer_cache.resume = tauros2_resume; - } -#endif - #ifdef CONFIG_CPU_32v7 /* * Check whether this CPU has support for the v7 hierarchical -- cgit v1.2.3