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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2017 Intel 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
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/io.h>
#include <assert.h>
#include <intelblocks/pcr.h>
#include <soc/pcr_ids.h>
#if !defined(CONFIG_PCR_BASE_ADDRESS) || (CONFIG_PCR_BASE_ADDRESS == 0)
#error "PCR_BASE_ADDRESS need to be non-zero!"
#endif
static void *__pcr_reg_address(uint8_t pid, uint16_t offset)
{
uintptr_t reg_addr;
/* Create an address based off of port id and offset. */
reg_addr = CONFIG_PCR_BASE_ADDRESS;
reg_addr += ((uintptr_t)pid) << PCR_PORTID_SHIFT;
reg_addr += (uintptr_t)offset;
return (void *)reg_addr;
}
void *pcr_reg_address(uint8_t pid, uint16_t offset)
{
if (IS_ENABLED(CONFIG_PCR_COMMON_IOSF_1_0))
assert(IS_ALIGNED(offset, sizeof(uint32_t)));
return __pcr_reg_address(pid, offset);
}
/*
* The mapping of addresses via the SBREG_BAR assumes the IOSF-SB
* agents are using 32-bit aligned accesses for their configuration
* registers. For IOSF versions greater than 1_0, IOSF-SB
* agents can use any access (8/16/32 bit aligned) for their
* configuration registers
*/
static inline void check_pcr_offset_align(uint16_t offset, size_t size)
{
const size_t align = IS_ENABLED(CONFIG_PCR_COMMON_IOSF_1_0) ?
sizeof(uint32_t) : size;
assert(IS_ALIGNED(offset, align));
}
uint32_t pcr_read32(uint8_t pid, uint16_t offset)
{
/* Ensure the PCR offset is correctly aligned. */
assert(IS_ALIGNED(offset, sizeof(uint32_t)));
return read32(__pcr_reg_address(pid, offset));
}
uint16_t pcr_read16(uint8_t pid, uint16_t offset)
{
/* Ensure the PCR offset is correctly aligned. */
check_pcr_offset_align(offset, sizeof(uint16_t));
return read16(__pcr_reg_address(pid, offset));
}
uint8_t pcr_read8(uint8_t pid, uint16_t offset)
{
/* Ensure the PCR offset is correctly aligned. */
check_pcr_offset_align(offset, sizeof(uint8_t));
return read8(__pcr_reg_address(pid, offset));
}
/*
* After every write one needs to perform a read an innocuous register to
* ensure the writes are completed for certain ports. This is done for
* all ports so that the callers don't need the per-port knowledge for
* each transaction.
*/
static inline void write_completion(uint8_t pid, uint16_t offset)
{
read32(__pcr_reg_address(pid, ALIGN_DOWN(offset, sizeof(uint32_t))));
}
void pcr_write32(uint8_t pid, uint16_t offset, uint32_t indata)
{
/* Ensure the PCR offset is correctly aligned. */
assert(IS_ALIGNED(offset, sizeof(indata)));
write32(__pcr_reg_address(pid, offset), indata);
/* Ensure the writes complete. */
write_completion(pid, offset);
}
void pcr_write16(uint8_t pid, uint16_t offset, uint16_t indata)
{
/* Ensure the PCR offset is correctly aligned. */
check_pcr_offset_align(offset, sizeof(uint16_t));
write16(__pcr_reg_address(pid, offset), indata);
/* Ensure the writes complete. */
write_completion(pid, offset);
}
void pcr_write8(uint8_t pid, uint16_t offset, uint8_t indata)
{
/* Ensure the PCR offset is correctly aligned. */
check_pcr_offset_align(offset, sizeof(uint8_t));
write8(__pcr_reg_address(pid, offset), indata);
/* Ensure the writes complete. */
write_completion(pid, offset);
}
void pcr_rmw32(uint8_t pid, uint16_t offset, uint32_t anddata, uint32_t ordata)
{
uint32_t data32;
data32 = pcr_read32(pid, offset);
data32 &= anddata;
data32 |= ordata;
pcr_write32(pid, offset, data32);
}
void pcr_rmw16(uint8_t pid, uint16_t offset, uint16_t anddata, uint16_t ordata)
{
uint16_t data16;
data16 = pcr_read16(pid, offset);
data16 &= anddata;
data16 |= ordata;
pcr_write16(pid, offset, data16);
}
void pcr_rmw8(uint8_t pid, uint16_t offset, uint8_t anddata, uint8_t ordata)
{
uint8_t data8;
data8 = pcr_read8(pid, offset);
data8 &= anddata;
data8 |= ordata;
pcr_write8(pid, offset, data8);
}
void pcr_or32(uint8_t pid, uint16_t offset, uint32_t ordata)
{
uint32_t data32;
data32 = pcr_read32(pid, offset);
data32 |= ordata;
pcr_write32(pid, offset, data32);
}
void pcr_or16(uint8_t pid, uint16_t offset, uint16_t ordata)
{
uint16_t data16;
data16 = pcr_read16(pid, offset);
data16 |= ordata;
pcr_write16(pid, offset, data16);
}
void pcr_or8(uint8_t pid, uint16_t offset, uint8_t ordata)
{
uint8_t data8;
data8 = pcr_read8(pid, offset);
data8 |= ordata;
pcr_write8(pid, offset, data8);
}
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