ARC: [arcfpga] Get rid of legacy BVCI latency unit support

[firefly-linux-kernel-4.4.55.git] / arch / arc / plat-arcfpga / platform.c

diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c
index 213394a15cd234144f367e357e1a4d2e88080be3..f09e771b4bbdbbee4f1fbcb4010a0e6f802da68d 100644 (file)
--- a/arch/arc/plat-arcfpga/platform.c
+++ b/arch/arc/plat-arcfpga/platform.c
@@ -22,59 +22,6 @@
 #include <plat/smp.h>
 #include <plat/irq.h>
 
-/*-----------------------BVCI Latency Unit -----------------------------*/
-
-#ifdef CONFIG_ARC_HAS_BVCI_LAT_UNIT
-
-int lat_cycles = CONFIG_BVCI_LAT_CYCLES;
-
-/* BVCI Bus Profiler: Latency Unit */
-static void __init setup_bvci_lat_unit(void)
-{
-#define MAX_BVCI_UNITS 12
-
-       unsigned int i;
-       unsigned int *base = (unsigned int *)BVCI_LAT_UNIT_BASE;
-       const unsigned long units_req = CONFIG_BVCI_LAT_UNITS;
-       const unsigned int REG_UNIT = 21;
-       const unsigned int REG_VAL = 22;
-
-       /*
-        * There are multiple Latency Units corresponding to the many
-        * interfaces of the system bus arbiter (both CPU side as well as
-        * the peripheral side).
-        *
-        * Unit  0 - System Arb and Mem Controller - adds latency to all
-        *          memory trasactions
-        * Unit  1 - I$ and System Bus
-        * Unit  2 - D$ and System Bus
-        * ..
-        * Unit 12 - IDE Disk controller and System Bus
-        *
-        * The programmers model requires writing to lat_unit reg first
-        * and then the latency value (cycles) to lat_value reg
-        */
-
-       if (CONFIG_BVCI_LAT_UNITS == 0) {
-               writel(0, base + REG_UNIT);
-               writel(lat_cycles, base + REG_VAL);
-               pr_info("BVCI Latency for all Memory Transactions %d cycles\n",
-                       lat_cycles);
-       } else {
-               for_each_set_bit(i, &units_req, MAX_BVCI_UNITS) {
-                       writel(i + 1, base + REG_UNIT); /* loop is 0 based */
-                       writel(lat_cycles, base + REG_VAL);
-                       pr_info("BVCI Latency for Unit[%d] = %d cycles\n",
-                               (i + 1), lat_cycles);
-               }
-       }
-}
-#else
-static void __init setup_bvci_lat_unit(void)
-{
-}
-#endif
-
 /*----------------------- Platform Devices -----------------------------*/
 
 #if IS_ENABLED(CONFIG_SERIAL_ARC)
@@ -165,8 +112,6 @@ static void __init plat_fpga_early_init(void)
 {
        pr_info("[plat-arcfpga]: registering early dev resources\n");
 
-       setup_bvci_lat_unit();
-
        arc_fpga_serial_init();
 
 #ifdef CONFIG_ISS_SMP_EXTN