diff options
| -rw-r--r-- | arch/arm/mach-omap2/Kconfig | 21 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/common.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/common.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/io.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap-secure.h | 7 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap4-common.c | 69 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/sleep44xx.S | 2 |
7 files changed, 0 insertions, 105 deletions
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index 2b8e47788062..c7f4d9a6b38c 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -278,27 +278,6 @@ config OMAP3_SDRC_AC_TIMING wish to say no. Selecting yes without understanding what is going on could result in system crashes; -config OMAP4_ERRATA_I688 - bool "OMAP4 errata: Async Bridge Corruption" - depends on (ARCH_OMAP4 || SOC_OMAP5) && !ARCH_MULTIPLATFORM - select ARCH_HAS_BARRIERS - help - If a data is stalled inside asynchronous bridge because of back - pressure, it may be accepted multiple times, creating pointer - misalignment that will corrupt next transfers on that data path - until next reset of the system (No recovery procedure once the - issue is hit, the path remains consistently broken). Async bridge - can be found on path between MPU to EMIF and MPU to L3 interconnect. - This situation can happen only when the idle is initiated by a - Master Request Disconnection (which is trigged by software when - executing WFI on CPU). - The work-around for this errata needs all the initiators connected - through async bridge must ensure that data path is properly drained - before issuing WFI. This condition will be met if one Strongly ordered - access is performed to the target right before executing the WFI. - In MPU case, L3 T2ASYNC FIFO and DDR T2ASYNC FIFO needs to be drained. - IO barrier ensure that there is no synchronisation loss on initiators - operating on both interconnect port simultaneously. endmenu endif diff --git a/arch/arm/mach-omap2/common.c b/arch/arm/mach-omap2/common.c index 484cdadfb187..eae6a0e87c90 100644 --- a/arch/arm/mach-omap2/common.c +++ b/arch/arm/mach-omap2/common.c @@ -30,5 +30,4 @@ int __weak omap_secure_ram_reserve_memblock(void) void __init omap_reserve(void) { omap_secure_ram_reserve_memblock(); - omap_barrier_reserve_memblock(); } diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h index 46e24581d624..cf3cf22ecd42 100644 --- a/arch/arm/mach-omap2/common.h +++ b/arch/arm/mach-omap2/common.h @@ -200,9 +200,6 @@ void __init omap4_map_io(void); void __init omap5_map_io(void); void __init ti81xx_map_io(void); -/* omap_barriers_init() is OMAP4 only */ -void omap_barriers_init(void); - /** * omap_test_timeout - busy-loop, testing a condition * @cond: condition to test until it evaluates to true diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index c4871c55bd8b..1eeff6be260d 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -306,7 +306,6 @@ void __init am33xx_map_io(void) void __init omap4_map_io(void) { iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc)); - omap_barriers_init(); } #endif @@ -314,7 +313,6 @@ void __init omap4_map_io(void) void __init omap5_map_io(void) { iotable_init(omap54xx_io_desc, ARRAY_SIZE(omap54xx_io_desc)); - omap_barriers_init(); } #endif /* diff --git a/arch/arm/mach-omap2/omap-secure.h b/arch/arm/mach-omap2/omap-secure.h index dec2b05d184b..af2851fbcdf0 100644 --- a/arch/arm/mach-omap2/omap-secure.h +++ b/arch/arm/mach-omap2/omap-secure.h @@ -70,13 +70,6 @@ extern u32 rx51_secure_dispatcher(u32 idx, u32 process, u32 flag, u32 nargs, extern u32 rx51_secure_update_aux_cr(u32 set_bits, u32 clear_bits); extern u32 rx51_secure_rng_call(u32 ptr, u32 count, u32 flag); -#ifdef CONFIG_OMAP4_ERRATA_I688 -extern int omap_barrier_reserve_memblock(void); -#else -static inline void omap_barrier_reserve_memblock(void) -{ } -#endif - #ifdef CONFIG_SOC_HAS_REALTIME_COUNTER void set_cntfreq(void); #else diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c index cee0fe1ee6ff..afaac9e25764 100644 --- a/arch/arm/mach-omap2/omap4-common.c +++ b/arch/arm/mach-omap2/omap4-common.c @@ -52,75 +52,6 @@ static void __iomem *twd_base; #define IRQ_LOCALTIMER 29 -#ifdef CONFIG_OMAP4_ERRATA_I688 -/* Used to implement memory barrier on DRAM path */ -#define OMAP4_DRAM_BARRIER_VA 0xfe600000 - -void __iomem *dram_sync, *sram_sync; - -static phys_addr_t paddr; -static u32 size; - -void omap_bus_sync(void) -{ - if (dram_sync && sram_sync) { - writel_relaxed(readl_relaxed(dram_sync), dram_sync); - writel_relaxed(readl_relaxed(sram_sync), sram_sync); - isb(); - } -} -EXPORT_SYMBOL(omap_bus_sync); - -static int __init omap4_sram_init(void) -{ - struct device_node *np; - struct gen_pool *sram_pool; - - np = of_find_compatible_node(NULL, NULL, "ti,omap4-mpu"); - if (!np) - pr_warn("%s:Unable to allocate sram needed to handle errata I688\n", - __func__); - sram_pool = of_get_named_gen_pool(np, "sram", 0); - if (!sram_pool) - pr_warn("%s:Unable to get sram pool needed to handle errata I688\n", - __func__); - else - sram_sync = (void *)gen_pool_alloc(sram_pool, PAGE_SIZE); - - return 0; -} -omap_arch_initcall(omap4_sram_init); - -/* Steal one page physical memory for barrier implementation */ -int __init omap_barrier_reserve_memblock(void) -{ - - size = ALIGN(PAGE_SIZE, SZ_1M); - paddr = arm_memblock_steal(size, SZ_1M); - - return 0; -} - -void __init omap_barriers_init(void) -{ - struct map_desc dram_io_desc[1]; - - dram_io_desc[0].virtual = OMAP4_DRAM_BARRIER_VA; - dram_io_desc[0].pfn = __phys_to_pfn(paddr); - dram_io_desc[0].length = size; - dram_io_desc[0].type = MT_MEMORY_RW_SO; - iotable_init(dram_io_desc, ARRAY_SIZE(dram_io_desc)); - dram_sync = (void __iomem *) dram_io_desc[0].virtual; - - pr_info("OMAP4: Map 0x%08llx to 0x%08lx for dram barrier\n", - (long long) paddr, dram_io_desc[0].virtual); - -} -#else -void __init omap_barriers_init(void) -{} -#endif - void gic_dist_disable(void) { if (gic_dist_base_addr) diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S index b84a0122d823..ad1bb9431e94 100644 --- a/arch/arm/mach-omap2/sleep44xx.S +++ b/arch/arm/mach-omap2/sleep44xx.S @@ -333,11 +333,9 @@ ENDPROC(omap4_cpu_resume) #endif /* defined(CONFIG_SMP) && defined(CONFIG_PM) */ -#ifndef CONFIG_OMAP4_ERRATA_I688 ENTRY(omap_bus_sync) ret lr ENDPROC(omap_bus_sync) -#endif ENTRY(omap_do_wfi) stmfd sp!, {lr} |