diff options
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/Kconfig | 12 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/arch_checks.c | 4 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/cache.S | 15 |
3 files changed, 20 insertions, 11 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index f66294b4f9d2..de4bd432b439 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -853,6 +853,18 @@ config CPLB_SWITCH_TAB_L1 If enabled, the CPLB Switch Tables are linked into L1 data memory. (less latency) +config CACHE_FLUSH_L1 + bool "Locate cache flush funcs in L1 Inst Memory" + default y + help + If enabled, the Blackfin cache flushing functions are linked + into L1 instruction memory. + + Note that this might be required to address anomalies, but + these functions are pretty small, so it shouldn't be too bad. + If you are using a processor affected by an anomaly, the build + system will double check for you and prevent it. + config APP_STACK_L1 bool "Support locating application stack in L1 Scratch Memory" default y diff --git a/arch/blackfin/mach-common/arch_checks.c b/arch/blackfin/mach-common/arch_checks.c index 77d1c320d7e6..bceb98126c21 100644 --- a/arch/blackfin/mach-common/arch_checks.c +++ b/arch/blackfin/mach-common/arch_checks.c @@ -60,3 +60,7 @@ (defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK)) # error "Anomaly 05000220 does not allow you to use Write Back cache with L2 or External Memory" #endif + +#if ANOMALY_05000491 && !defined(CONFIG_CACHE_FLUSH_L1) +# error You need IFLUSH in L1 inst while Anomaly 05000491 applies +#endif diff --git a/arch/blackfin/mach-common/cache.S b/arch/blackfin/mach-common/cache.S index ea540318a228..790c767ca95a 100644 --- a/arch/blackfin/mach-common/cache.S +++ b/arch/blackfin/mach-common/cache.S @@ -11,7 +11,11 @@ #include <asm/cache.h> #include <asm/page.h> +#ifdef CONFIG_CACHE_FLUSH_L1 +.section .l1.text +#else .text +#endif /* 05000443 - IFLUSH cannot be last instruction in hardware loop */ #if ANOMALY_05000443 @@ -64,17 +68,6 @@ /* Invalidate all instruction cache lines assocoiated with this memory area */ ENTRY(_blackfin_icache_flush_range) -/* - * Walkaround to avoid loading wrong instruction after invalidating icache - * and following sequence is met. - * - * 1) One instruction address is cached in the instruction cache. - * 2) This instruction in SDRAM is changed. - * 3) IFLASH[P0] is executed only once in blackfin_icache_flush_range(). - * 4) This instruction is executed again, but the old one is loaded. - */ - P0 = R0; - IFLUSH[P0]; do_flush IFLUSH ENDPROC(_blackfin_icache_flush_range) |