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Annotation of qemu/roms/SLOF/board-js2x/rtas/rtas_pci.c, revision 1.1

1.1     ! root        1: /******************************************************************************
        !             2:  * Copyright (c) 2004, 2008 IBM Corporation
        !             3:  * All rights reserved.
        !             4:  * This program and the accompanying materials
        !             5:  * are made available under the terms of the BSD License
        !             6:  * which accompanies this distribution, and is available at
        !             7:  * http://www.opensource.org/licenses/bsd-license.php
        !             8:  *
        !             9:  * Contributors:
        !            10:  *     IBM Corporation - initial implementation
        !            11:  *****************************************************************************/
        !            12: #include <stdint.h>
        !            13: #include <rtas.h>
        !            14: #include <hw.h>
        !            15: 
        !            16: int
        !            17: rtas_ibm_read_pci_config (rtas_args_t *rtas_args) {
        !            18:        int retVal = 0;
        !            19:        uint64_t addr = ((uint64_t) rtas_args->args[1]) << 32;  // high 32 bits of PHB UID
        !            20:        addr |= (rtas_args->args[2] & 0xFFFFFFFF); // low 32 bits of PHB UID
        !            21:        addr |= (rtas_args->args[0] & 0x00FFFFFF); // bus, devfn, offset
        !            22:        unsigned int size = rtas_args->args[3];
        !            23: 
        !            24:        /* Check for bus != 0  on PCI/PCI-X (PHB UID = 0xf2000000) */
        !            25:        if (((addr & 0xf2000000) == 0xf2000000) && (addr & 0xff0000))
        !            26:                addr += 0x1000000;
        !            27: 
        !            28:        if (size == 1)
        !            29:                rtas_args->args[5] = load8_ci(addr);
        !            30:        else if (size == 2)
        !            31:                rtas_args->args[5] = bswap16_load(addr);
        !            32:        else if (size == 4)
        !            33:                rtas_args->args[5] = bswap32_load(addr);
        !            34:        else
        !            35:                retVal = -3;  /* Bad arguments */
        !            36: 
        !            37:        return retVal;
        !            38: }
        !            39: 
        !            40: int
        !            41: rtas_ibm_write_pci_config (rtas_args_t *rtas_args) {
        !            42:        int retVal = 0;
        !            43:        uint64_t addr = ((uint64_t) rtas_args->args[1]) << 32;  // high 32 bits of PHB UID
        !            44:        addr |= (rtas_args->args[2] & 0xFFFFFFFF); // low 32 bits of PHB UID
        !            45:        addr |= (rtas_args->args[0] & 0x00FFFFFF); // bus, devfn, offset
        !            46:        unsigned int size = rtas_args->args[3];
        !            47: 
        !            48:        addr |= 0xf2000000;
        !            49: 
        !            50:        /* Check for bus != 0  on PCI/PCI-X (PHB UID = 0xf2000000) */
        !            51:        if (((addr & 0xf2000000) == 0xf2000000) && (addr & 0xff0000))
        !            52:                addr += 0x1000000;
        !            53: 
        !            54:        if (size == 1)
        !            55:                store8_ci(addr, rtas_args->args[4]);
        !            56:        else if (size == 2)
        !            57:                bswap16_store(addr, rtas_args->args[4]);
        !            58:        else if (size == 4)
        !            59:                bswap32_store(addr, rtas_args->args[4]);
        !            60:        else
        !            61:                retVal = -3;  /* Bad arguments */
        !            62: 
        !            63:        return retVal;
        !            64: }
        !            65: 
        !            66: int
        !            67: rtas_read_pci_config (rtas_args_t *rtas_args) {
        !            68:        int retVal = 0;
        !            69:        unsigned long addr = rtas_args->args[0];
        !            70:        unsigned int size = rtas_args->args[1];
        !            71:        addr |= 0xf2000000;
        !            72: 
        !            73:        /* Check for bus != 0 */
        !            74:        if (addr & 0xff0000)
        !            75:                addr += 0x1000000;
        !            76: 
        !            77:        if (size == 1)
        !            78:                rtas_args->args[3] = load8_ci(addr);
        !            79:        else if (size == 2)
        !            80:                rtas_args->args[3] = bswap16_load(addr);
        !            81:        else if (size == 4)
        !            82:                rtas_args->args[3] = bswap32_load(addr);
        !            83:        else
        !            84:                retVal = -3;  /* Bad arguments */
        !            85: 
        !            86:        return retVal;
        !            87: }
        !            88: 
        !            89: int
        !            90: rtas_write_pci_config (rtas_args_t *rtas_args) {
        !            91:        int retVal = 0;
        !            92:        unsigned long addr = rtas_args->args[0];
        !            93:        unsigned int size = rtas_args->args[1];
        !            94: 
        !            95:        addr |= 0xf2000000;
        !            96: 
        !            97:        /* Check for bus != 0 */
        !            98:        if (addr & 0xff0000)
        !            99:                addr += 0x1000000;
        !           100: 
        !           101:        if (size == 1)
        !           102:                store8_ci(addr, rtas_args->args[2]);
        !           103:        else if (size == 2)
        !           104:                bswap16_store(addr, rtas_args->args[2]);
        !           105:        else if (size == 4)
        !           106:                bswap32_store(addr, rtas_args->args[2]);
        !           107:        else
        !           108:                retVal = -3;  /* Bad arguments */
        !           109: 
        !           110:        return retVal;
        !           111: }

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