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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <stdint.h>
#include <rtas.h>
#include <hw.h>
int
rtas_ibm_read_pci_config (rtas_args_t *rtas_args) {
int retVal = 0;
uint64_t addr = ((uint64_t) rtas_args->args[1]) << 32; // high 32 bits of PHB UID
addr |= (rtas_args->args[2] & 0xFFFFFFFF); // low 32 bits of PHB UID
addr |= (rtas_args->args[0] & 0x00FFFFFF); // bus, devfn, offset
unsigned int size = rtas_args->args[3];
/* Check for bus != 0 on PCI/PCI-X (PHB UID = 0xf2000000) */
if (((addr & 0xf2000000) == 0xf2000000) && (addr & 0xff0000))
addr += 0x1000000;
if (size == 1)
rtas_args->args[5] = load8_ci(addr);
else if (size == 2)
rtas_args->args[5] = bswap16_load(addr);
else if (size == 4)
rtas_args->args[5] = bswap32_load(addr);
else
retVal = -3; /* Bad arguments */
return retVal;
}
int
rtas_ibm_write_pci_config (rtas_args_t *rtas_args) {
int retVal = 0;
uint64_t addr = ((uint64_t) rtas_args->args[1]) << 32; // high 32 bits of PHB UID
addr |= (rtas_args->args[2] & 0xFFFFFFFF); // low 32 bits of PHB UID
addr |= (rtas_args->args[0] & 0x00FFFFFF); // bus, devfn, offset
unsigned int size = rtas_args->args[3];
addr |= 0xf2000000;
/* Check for bus != 0 on PCI/PCI-X (PHB UID = 0xf2000000) */
if (((addr & 0xf2000000) == 0xf2000000) && (addr & 0xff0000))
addr += 0x1000000;
if (size == 1)
store8_ci(addr, rtas_args->args[4]);
else if (size == 2)
bswap16_store(addr, rtas_args->args[4]);
else if (size == 4)
bswap32_store(addr, rtas_args->args[4]);
else
retVal = -3; /* Bad arguments */
return retVal;
}
int
rtas_read_pci_config (rtas_args_t *rtas_args) {
int retVal = 0;
unsigned long addr = rtas_args->args[0];
unsigned int size = rtas_args->args[1];
addr |= 0xf2000000;
/* Check for bus != 0 */
if (addr & 0xff0000)
addr += 0x1000000;
if (size == 1)
rtas_args->args[3] = load8_ci(addr);
else if (size == 2)
rtas_args->args[3] = bswap16_load(addr);
else if (size == 4)
rtas_args->args[3] = bswap32_load(addr);
else
retVal = -3; /* Bad arguments */
return retVal;
}
int
rtas_write_pci_config (rtas_args_t *rtas_args) {
int retVal = 0;
unsigned long addr = rtas_args->args[0];
unsigned int size = rtas_args->args[1];
addr |= 0xf2000000;
/* Check for bus != 0 */
if (addr & 0xff0000)
addr += 0x1000000;
if (size == 1)
store8_ci(addr, rtas_args->args[2]);
else if (size == 2)
bswap16_store(addr, rtas_args->args[2]);
else if (size == 4)
bswap32_store(addr, rtas_args->args[2]);
else
retVal = -3; /* Bad arguments */
return retVal;
}
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