Sync up ArmPkg with patch from mailing list. Changed name of BdsLib.h to BdsUnixLib...

[mirror_edk2.git] / ArmPkg / Drivers / PL310L2Cache / PL310L2Cache.c

/** @file\r
*\r
*  Copyright (c) 2011, ARM Limited. All rights reserved.\r
*  \r
*  This program and the accompanying materials                          \r
*  are licensed and made available under the terms and conditions of the BSD License         \r
*  which accompanies this distribution.  The full text of the license may be found at        \r
*  http://opensource.org/licenses/bsd-license.php                                            \r
*\r
*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
*\r
**/\r
\r
#include <Library/IoLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/ArmLib.h>\r
#include <Library/L2X0CacheLib.h>\r
#include <Library/PcdLib.h>\r
\r
#define L2x0WriteReg(reg,val)               MmioWrite32(PcdGet32(PcdL2x0ControllerBase) + reg, val)\r
#define L2x0ReadReg(reg)                    MmioRead32(PcdGet32(PcdL2x0ControllerBase) + reg)\r
\r
// Initialize PL320 L2 Cache Controller\r
VOID L2x0CacheInit(UINTN L2x0Base, BOOLEAN CacheEnabled) {\r
    UINT32 Data;\r
    UINT32 Revision;\r
    UINT32 Aux;\r
    UINT32 PfCtl;\r
    UINT32 PwrCtl;\r
\r
    // Check if L2x0 is present and is an ARM implementation\r
    Data = L2x0ReadReg(L2X0_CACHEID);\r
    if ((Data >> 24) != L2X0_CACHEID_IMPLEMENTER_ARM) {\r
        ASSERT(0);\r
        return;\r
    }\r
\r
    // Check if L2x0 is PL310\r
    if (((Data >> 6) & 0xF) != L2X0_CACHEID_PARTNUM_PL310) {\r
        ASSERT(0);\r
        return;\r
    }\r
\r
    // RTL release\r
    Revision = Data & 0x3F;\r
\r
    // Check if L2x0 is already enabled then we disable it\r
    Data = L2x0ReadReg(L2X0_CTRL);\r
    if (Data & L2X0_CTRL_ENABLED) {\r
        L2x0WriteReg(L2X0_CTRL, L2X0_CTRL_DISABLED);\r
    }\r
\r
    //\r
    // Set up global configurations\r
    //\r
\r
    // Auxiliary register: Non-secure interrupt access Control + Event monitor bus enable + SBO\r
    Aux = L2X0_AUXCTRL_NSAC | L2X0_AUXCTRL_EM | L2X0_AUXCTRL_SBO;\r
    // Use AWCACHE attributes for WA\r
    Aux |= L2x0_AUXCTRL_AW_AWCACHE;\r
    // Use default Size\r
    Data = L2x0ReadReg(L2X0_AUXCTRL);\r
    Aux |= Data & (0x7 << 17);\r
    // Use default associativity\r
    Aux |= Data & (0x1 << 16);\r
    // Enabled I & D Prefetch\r
    Aux |= L2x0_AUXCTRL_IPREFETCH | L2x0_AUXCTRL_DPREFETCH;\r
    \r
    if (Revision >= 5) {\r
        // Prefetch Offset Register\r
        PfCtl = L2x0ReadReg(L2X0_PFCTRL);\r
        // - Prefetch increment set to 0\r
        // - Prefetch dropping off\r
        // - Double linefills off\r
        L2x0WriteReg(L2X0_PFCTRL, PfCtl);\r
\r
        // Power Control Register - L2X0_PWRCTRL\r
        PwrCtl = L2x0ReadReg(L2X0_PWRCTRL);\r
        // - Standby when idle off\r
        // - Dynamic clock gating off\r
        // - Nc,NC-shared dropping off\r
        L2x0WriteReg(L2X0_PWRCTRL, PwrCtl);\r
    }\r
\r
    if (Revision >= 4) {\r
        // Tag RAM Latency register\r
        // - Use default latency\r
    \r
        // Data RAM Latency Control register\r
        // - Use default latency\r
    } else if (Revision >= 2) {\r
        L2x0WriteReg(L230_TAG_LATENCY,\r
            (L2_TAG_ACCESS_LATENCY << 8)\r
            | (L2_TAG_ACCESS_LATENCY << 4)\r
            | L2_TAG_SETUP_LATENCY\r
        );\r
        \r
        L2x0WriteReg(L230_DATA_LATENCY,\r
            (L2_DATA_ACCESS_LATENCY << 8)\r
            | (L2_DATA_ACCESS_LATENCY << 4)\r
            | L2_DATA_SETUP_LATENCY\r
        );\r
    } else {\r
        Aux |= (L2_TAG_ACCESS_LATENCY << 6)\r
               | (L2_DATA_ACCESS_LATENCY << 3)\r
               | L2_DATA_ACCESS_LATENCY;\r
    }\r
\r
    // Write Auxiliary value\r
    L2x0WriteReg(L2X0_AUXCTRL, Aux);\r
\r
    //\r
    // Invalidate all entries in cache\r
    //\r
    L2x0WriteReg(L2X0_INVWAY, 0xffff);\r
    // Poll cache maintenance register until invalidate operation is complete\r
    while(L2x0ReadReg(L2X0_INVWAY) & 0xffff);\r
\r
    // Write to the Lockdown D and Lockdown I Register 9 if required\r
    // - Not required\r
\r
    // Clear any residual raw interrupts\r
    L2x0WriteReg(L2X0_INTCLEAR, 0x1FF);\r
\r
    // Enable the cache\r
    if (CacheEnabled) {\r
        L2x0WriteReg(L2X0_CTRL, L2X0_CTRL_ENABLED);\r
    }\r
}\r