diff options
| author | Manoj Chourasia <mchourasia@nvidia.com> | 2012-03-21 14:28:58 +0530 |
|---|---|---|
| committer | Varun Wadekar <vwadekar@nvidia.com> | 2012-04-18 10:08:17 +0530 |
| commit | e1c4fbe7a5d8ae7126c9ddd5207eb63ba0eab7c7 (patch) | |
| tree | d43ac987c04927f85f31bc5ae9d56eb51036d8da /arch/arm/mach-tegra/common-t3.c | |
| parent | 286c97c7cb3634035daeb340c770b413620add86 (diff) | |
ARM: tegra3: Make MC early ack feature configurable.
Add a config option to configure early acknowlegement
from memory controller.
Early acknowledgement is feature of memory controller
where MC acknowledged immediately to any write requests
from CPU. To maintain mermory coherency all the read
requests are blocked till all the early-acked writes
have reached to a point of coherency.
bug 943638
Change-Id: I97f30261c4711fc338b007502b6eef7217ddb6cb
Signed-off-by: Manoj Chourasia <mchourasia@nvidia.com>
Reviewed-on: http://git-master/r/91477
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/common-t3.c')
| -rw-r--r-- | arch/arm/mach-tegra/common-t3.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/mach-tegra/common-t3.c b/arch/arm/mach-tegra/common-t3.c index ccc351bf60d4..67122916f8fa 100644 --- a/arch/arm/mach-tegra/common-t3.c +++ b/arch/arm/mach-tegra/common-t3.c @@ -3,7 +3,7 @@ * * Tegra 3 SoC-specific initialization (memory controller, etc.) * - * Copyright (c) 2010-2011, NVIDIA Corporation. + * Copyright (c) 2010-2012, NVIDIA Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -248,10 +248,11 @@ static int __init tegra30_mc_init(void) reg = 0x0F7F1010; writel(reg, mc + MC_RESERVED_RSV); +#if defined(CONFIG_TEGRA_MC_EARLY_ACK) reg = readl(mc + MC_EMEM_ARB_OVERRIDE); reg |= 3; writel(reg, mc + MC_EMEM_ARB_OVERRIDE); - +#endif if (request_irq(INT_MC_GENERAL, tegra_mc_error_isr, 0, "mc_status", NULL)) { pr_err("%s: unable to register MC error interrupt\n", __func__); |