From mboxrd@z Thu Jan 1 00:00:00 1970 From: f.fainelli@gmail.com (Florian Fainelli) Date: Fri, 6 Mar 2015 16:54:51 -0800 Subject: [PATCH 3/5] ARM: Hook B15 readahead cache functions based on processor In-Reply-To: <1425689693-31034-1-git-send-email-f.fainelli@gmail.com> References: <1425689693-31034-1-git-send-email-f.fainelli@gmail.com> Message-ID: <1425689693-31034-4-git-send-email-f.fainelli@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org If we detect that we are running on a Broadcom Brahma-B15 CPU, and CONFIG_CACHE_B15_RAC is enabled, make sure that we pick-up the b15_cache_fns function operations. If CONFIG_CACHE_B15_RAC is enabled, but we are not running on a Broadcom Brahma-B15 CPU, we will fallback to calling into the regular v7_cache_fns with no cost. If CONFIG_CACHE_B15_RAC is disabled, there is no cost and we just use the regular v7_cache_fns. Signed-off-by: Florian Fainelli --- arch/arm/mm/cache-v7.S | 21 +++++++++++++++++++++ arch/arm/mm/proc-v7.S | 2 +- 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S index b966656d2c2d..86a065e5e5a5 100644 --- a/arch/arm/mm/cache-v7.S +++ b/arch/arm/mm/cache-v7.S @@ -15,6 +15,7 @@ #include #include #include +#include #include "proc-macros.S" @@ -446,3 +447,23 @@ ENDPROC(v7_dma_unmap_area) @ define struct cpu_cache_fns (see and proc-macros.S) define_cache_functions v7 + + /* The Broadcom Brahma-B15 read-ahead cache requires some modifications + * to the v7_cache_fns, we only override the ones we need + */ +#ifndef CONFIG_CACHE_B15_RAC + globl_equ b15_flush_icache_all, v7_flush_icache_all + globl_equ b15_flush_kern_cache_all, v7_flush_kern_cache_all + globl_equ b15_flush_kern_cache_louis, v7_flush_kern_cache_louis +#endif + globl_equ b15_flush_user_cache_all, v7_flush_user_cache_all + globl_equ b15_flush_user_cache_range, v7_flush_user_cache_range + globl_equ b15_coherent_kern_range, v7_coherent_kern_range + globl_equ b15_coherent_user_range, v7_coherent_user_range + globl_equ b15_flush_kern_dcache_area, v7_flush_kern_dcache_area + + globl_equ b15_dma_map_area, v7_dma_map_area + globl_equ b15_dma_unmap_area, v7_dma_unmap_area + globl_equ b15_dma_flush_range, v7_dma_flush_range + + define_cache_functions b15 diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index e0dc266579bc..683ad5f2c0c5 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -568,7 +568,7 @@ __v7_ca15mp_proc_info: __v7_b15mp_proc_info: .long 0x420f00f0 .long 0xff0ffff0 - __v7_proc __v7_b15mp_setup + __v7_proc __v7_b15mp_setup, cache_fns = b15_cache_fns .size __v7_b15mp_proc_info, . - __v7_b15mp_proc_info /* -- 2.1.0