From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 15 Jul 2005 15:23:23 +0000 (+0000)
Subject: Avoid SMP cacheflushes.  This is a minor optimization of startup but
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1d40cfcd3442a53e98468cdb3e6d4d9a568d76cf;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Avoid SMP cacheflushes.  This is a minor optimization of startup but
will also avoid smp_call_function from doing stupid things when called
from a CPU that is not yet marked online.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 0a3969aa8dc6..519b8f18eedf 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1150,6 +1150,7 @@ static inline void signal32_init(void)
 
 extern void cpu_cache_init(void);
 extern void tlb_init(void);
+extern void flush_tlb_handlers(void);
 
 void __init per_cpu_trap_init(void)
 {
@@ -1348,4 +1349,5 @@ void __init trap_init(void)
 #endif
 
 	flush_icache_range(ebase, ebase + 0x400);
+	flush_tlb_handlers();
 }
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 6a1267ad071f..637052b23042 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1270,9 +1270,8 @@ void __init ld_mmu_r4xx0(void)
 	_dma_cache_inv		= r4k_dma_cache_inv;
 #endif
 
-	__flush_cache_all();
-	coherency_setup();
-
 	build_clear_page();
 	build_copy_page();
+	local_r4k___flush_cache_all(NULL);
+	coherency_setup();
 }
diff --git a/arch/mips/mm/c-tx39.c b/arch/mips/mm/c-tx39.c
index 5054a0ed2b6d..56c3fcdd2822 100644
--- a/arch/mips/mm/c-tx39.c
+++ b/arch/mips/mm/c-tx39.c
@@ -492,4 +492,5 @@ void __init ld_mmu_tx39(void)
 
 	build_clear_page();
 	build_copy_page();
+	tx39h_flush_icache_all();
 }
diff --git a/arch/mips/mm/pg-r4k.c b/arch/mips/mm/pg-r4k.c
index 9f8b16541577..75d9ebfc5431 100644
--- a/arch/mips/mm/pg-r4k.c
+++ b/arch/mips/mm/pg-r4k.c
@@ -404,9 +404,6 @@ dest = label();
 
 	build_jr_ra();
 
-	flush_icache_range((unsigned long)&clear_page_array,
-	                   (unsigned long) epc);
-
 	BUG_ON(epc > clear_page_array + ARRAY_SIZE(clear_page_array));
 }
 
@@ -482,8 +479,5 @@ dest = label();
 
 	build_jr_ra();
 
-	flush_icache_range((unsigned long)&copy_page_array,
-	                   (unsigned long) epc);
-
 	BUG_ON(epc > copy_page_array + ARRAY_SIZE(copy_page_array));
 }
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index a876ed6cde24..c3c75a234f50 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -743,7 +743,6 @@ static void __init build_r3000_tlb_refill_handler(void)
 #endif
 
 	memcpy((void *)CAC_BASE, tlb_handler, 0x80);
-	flush_icache_range(CAC_BASE, CAC_BASE + 0x80);
 }
 
 /*
@@ -1258,7 +1257,6 @@ static void __init build_r4000_tlb_refill_handler(void)
 #endif
 
 	memcpy((void *)CAC_BASE, final_handler, 0x100);
-	flush_icache_range(CAC_BASE, CAC_BASE + 0x100);
 }
 
 /*
@@ -1519,9 +1517,6 @@ static void __init build_r3000_tlb_load_handler(void)
 			printk("%08x\n", handle_tlbl[i]);
 	}
 #endif
-
-	flush_icache_range((unsigned long)handle_tlbl,
-			   (unsigned long)handle_tlbl + FASTPATH_SIZE * sizeof(u32));
 }
 
 static void __init build_r3000_tlb_store_handler(void)
@@ -1559,9 +1554,6 @@ static void __init build_r3000_tlb_store_handler(void)
 			printk("%08x\n", handle_tlbs[i]);
 	}
 #endif
-
-	flush_icache_range((unsigned long)handle_tlbs,
-			   (unsigned long)handle_tlbs + FASTPATH_SIZE * sizeof(u32));
 }
 
 static void __init build_r3000_tlb_modify_handler(void)
@@ -1599,9 +1591,6 @@ static void __init build_r3000_tlb_modify_handler(void)
 			printk("%08x\n", handle_tlbm[i]);
 	}
 #endif
-
-	flush_icache_range((unsigned long)handle_tlbm,
-			   (unsigned long)handle_tlbm + FASTPATH_SIZE * sizeof(u32));
 }
 
 /*
@@ -1691,9 +1680,6 @@ static void __init build_r4000_tlb_load_handler(void)
 			printk("%08x\n", handle_tlbl[i]);
 	}
 #endif
-
-	flush_icache_range((unsigned long)handle_tlbl,
-			   (unsigned long)handle_tlbl + FASTPATH_SIZE * sizeof(u32));
 }
 
 static void __init build_r4000_tlb_store_handler(void)
@@ -1730,9 +1716,6 @@ static void __init build_r4000_tlb_store_handler(void)
 			printk("%08x\n", handle_tlbs[i]);
 	}
 #endif
-
-	flush_icache_range((unsigned long)handle_tlbs,
-			   (unsigned long)handle_tlbs + FASTPATH_SIZE * sizeof(u32));
 }
 
 static void __init build_r4000_tlb_modify_handler(void)
@@ -1770,9 +1753,6 @@ static void __init build_r4000_tlb_modify_handler(void)
 			printk("%08x\n", handle_tlbm[i]);
 	}
 #endif
-
-	flush_icache_range((unsigned long)handle_tlbm,
-			   (unsigned long)handle_tlbm + FASTPATH_SIZE * sizeof(u32));
 }
 
 void __init build_tlb_refill_handler(void)
@@ -1820,3 +1800,13 @@ void __init build_tlb_refill_handler(void)
 		}
 	}
 }
+
+void __init flush_tlb_handlers(void)
+{
+	flush_icache_range((unsigned long)handle_tlbl,
+			   (unsigned long)handle_tlbl + sizeof(handle_tlbl));
+	flush_icache_range((unsigned long)handle_tlbs,
+			   (unsigned long)handle_tlbs + sizeof(handle_tlbs));
+	flush_icache_range((unsigned long)handle_tlbm,
+			   (unsigned long)handle_tlbm + sizeof(handle_tlbm));
+}