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author	Mathias Kresin <dev@kresin.me>	2017-10-21 15:44:30 +0200
committer	Mathias Kresin <dev@kresin.me>	2017-10-25 09:22:06 +0200
commit	79992d197f00506a0ff7087420143de1ca0ccdd2 (patch)
tree	2cab81182b5de75b17b8ab6eb8abd4b1897422e2 /target/linux/mpc85xx/files/arch
parent	ec269290db46d491ae61adb64b19b3f171b8e2a3 (diff)
download	upstream-79992d197f00506a0ff7087420143de1ca0ccdd2.tar.gz upstream-79992d197f00506a0ff7087420143de1ca0ccdd2.tar.bz2 upstream-79992d197f00506a0ff7087420143de1ca0ccdd2.zip

mpc85xx: cleanup kernel config

Move the kernel config changes added with the HiveAP 330 to the subtarget the board belongs to instead of changing the target kernel config. While at it, move the TL_WDR4900_V1 config symbol to the containing subtarget and disable boards we don't support. Signed-off-by: Mathias Kresin <dev@kresin.me>

Diffstat (limited to 'target/linux/mpc85xx/files/arch')

0 files changed, 0 insertions, 0 deletions

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/*
 * Commonly used ACPI utility functions.
 * Probing for devices and writing SSDT entries into XSDT and RSDT tables.
 *
 * Yu Ke, ke.yu@intel.com
 * Copyright (c) 2005, Intel Corporation.
 * Copyright (c) 2006, IBM Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 */

#include "acpi/acpi2_0.h"
#include "acpi_utils.h"
#include "util.h"
#include <xen/hvm/e820.h>

static int acpi_rsdt_add_entry_pointer(unsigned char *acpi_start,
                                       unsigned char *entry);
static int acpi_xsdt_add_entry_pointer(unsigned char *acpi_start,
                                       unsigned char *entry);
static unsigned char *acpi_xsdt_add_entry(unsigned char *acpi_start,
                                          unsigned char **freemem,
                                          unsigned char *limit,
                                          unsigned char *table,
                                          unsigned int table_size);

void set_checksum(void *start, int checksum_offset, int len)
{
    unsigned char sum = 0;
    unsigned char *ptr;

    ptr = start;
    ptr[checksum_offset] = 0;
    while ( len-- )
        sum += *ptr++;

    ptr = start;
    ptr[checksum_offset] = -sum;
}


#include "acpi_ssdt_tpm.h"
static void acpi_tpm_tis_probe(unsigned char *acpi_start,
                               unsigned char **freemem,
                               unsigned char *limit)
{
    unsigned char *addr;
    ACPI_2_0_TCPA_CLIENT *tcpa;
    /* check TPM_DID, TPM_VID, TPM_RID in ioemu/hw/tpm_tis.c */
    uint16_t tis_did_vid_rid[] = {0x0001, 0x0001, 0x0001};
    static const ACPI_2_0_TCPA_CLIENT Tcpa = {
        .header = {
            .signature = ACPI_2_0_TCPA_SIGNATURE,
            .length    = sizeof(ACPI_2_0_TCPA_CLIENT),
            .revision  = ACPI_2_0_TCPA_REVISION,
            .oem_id    = {'I', 'B', 'M', ' ', ' ', ' '},
            .oem_table_id = ASCII64(' ', ' ', ' ', ' ', ' ', 'x', 'e', 'n'),
            .oem_revision = 1,
            .creator_id   = ASCII32('I', 'B', 'M', ' '),
            .creator_revision = 1,
        }
    };

    /* probe for TIS interface ... */
    if ( memcmp((char *)(0xFED40000 + 0xF00),
                tis_did_vid_rid,
                sizeof(tis_did_vid_rid)) != 0 )
        return;

    printf("TIS is available\n");
    addr = acpi_xsdt_add_entry(acpi_start, freemem, limit,
                               AmlCode_TPM, sizeof(AmlCode_TPM));
    if ( addr == NULL )
        return;

    /* legacy systems need an RSDT entry */
    acpi_rsdt_add_entry_pointer(acpi_start, addr);

    /* add ACPI TCPA table */
    addr = acpi_xsdt_add_entry(acpi_start, freemem, limit,
                               (unsigned char *)&Tcpa,
                               sizeof(Tcpa));
    if ( addr == NULL )
        return;

    tcpa = (ACPI_2_0_TCPA_CLIENT *)addr;
    tcpa->LASA = e820_malloc(
        ACPI_2_0_TCPA_LAML_SIZE, E820_RESERVED, (uint32_t)~0);
    if ( tcpa->LASA )
    {
        tcpa->LAML = ACPI_2_0_TCPA_LAML_SIZE;
        memset((char *)(unsigned long)tcpa->LASA,
               0x0,
               tcpa->LAML);
        set_checksum(tcpa,
                     FIELD_OFFSET(struct acpi_header, checksum),
                     tcpa->header.length);
    }

    acpi_rsdt_add_entry_pointer(acpi_start, addr);
}


/*
 * Call functions that probe for devices and have them register their
 * SSDT entries with the XSDT and RSDT tables.
 */
void acpi_update(unsigned char *acpi_start,
                 unsigned long acpi_size,
                 unsigned char *limit,
                 unsigned char **freemem)
{
    acpi_tpm_tis_probe(acpi_start, freemem, limit);
}


struct acpi_20_rsdt *acpi_rsdt_get(unsigned char *acpi_start)
{
    struct acpi_20_rsdp *rsdp;
    struct acpi_20_rsdt *rsdt;

    rsdp = (struct acpi_20_rsdp *)(acpi_start + sizeof(struct acpi_20_facs));
    if ( rsdp->signature != ACPI_2_0_RSDP_SIGNATURE )
    {
        printf("Bad RSDP signature\n");
        return NULL;
    }

    rsdt = (struct acpi_20_rsdt *)
        (acpi_start + rsdp->rsdt_address - ACPI_PHYSICAL_ADDRESS);
    if ( rsdt->header.signature != ACPI_2_0_RSDT_SIGNATURE )
    {
        printf("Bad RSDT signature\n");
        return NULL;
    }

    return rsdt;
}

/*
 * Add an entry to the RSDT table given the pointer to the entry.
 */
static int acpi_rsdt_add_entry_pointer(unsigned char *acpi_start,
                                       unsigned char *entry)
{
    struct acpi_20_rsdt *rsdt = acpi_rsdt_get(acpi_start);
    int found = 0;
    int i = 0;

    /* Find an empty slot in the RSDT table. */
    while ( i < ACPI_MAX_NUM_TABLES )
    {
        if ( rsdt->entry[i] == 0 )
        {
            found = 1;
            break;
        }
        i++;
    }

    if ( found )
    {
        rsdt->entry[i] = (uint64_t)(unsigned long)entry;
        rsdt->header.length =
            sizeof(struct acpi_header) +
            (i + 1) * sizeof(uint64_t);
        set_checksum(rsdt,
                     FIELD_OFFSET(struct acpi_header, checksum),
                     rsdt->header.length);
    }

    return found;
}

/* Get the XSDT table. */
struct acpi_20_xsdt *acpi_xsdt_get(unsigned char *acpi_start)
{
    struct acpi_20_rsdp *rsdp;
    struct acpi_20_xsdt *xsdt;

    rsdp = (struct acpi_20_rsdp *)(acpi_start + sizeof(struct acpi_20_facs));
    if ( rsdp->signature != ACPI_2_0_RSDP_SIGNATURE )
    {
        printf("Bad RSDP signature\n");
        return NULL;
    }

    xsdt = (struct acpi_20_xsdt *)
        (acpi_start + rsdp->xsdt_address - ACPI_PHYSICAL_ADDRESS);
    if ( xsdt->header.signature != ACPI_2_0_XSDT_SIGNATURE )
    {
        printf("Bad XSDT signature\n");
        return NULL;
    }
    return xsdt;
}

/*
 * Add an entry to the XSDT table given the pointer to the entry.
 */
static int acpi_xsdt_add_entry_pointer(unsigned char *acpi_start,
                                       unsigned char *entry)
{
    struct acpi_20_xsdt *xsdt = acpi_xsdt_get(acpi_start);
    int found = 0;
    int i = 0;

    /* Find an empty slot in the XSDT table. */
    while ( i < ACPI_MAX_NUM_TABLES )
    {
        if ( xsdt->entry[i] == 0 )
        {
            found = 1;
            break;
        }
        i++;
    }

    if ( found )
    {
        xsdt->entry[i] = (uint64_t)(unsigned long)entry;
        xsdt->header.length =
            sizeof(struct acpi_header) +
            (i + 1) * sizeof(uint64_t);
        set_checksum(xsdt,
                     FIELD_OFFSET(struct acpi_header, checksum),
                     xsdt->header.length);
    }

    return found;
}

/*
   add an entry to the xdst table entry pointers
   copy the given ssdt data to the current available memory at
   freemem, if it does not exceed the limit
 */
static unsigned char *acpi_xsdt_add_entry(unsigned char *acpi_start,
                                          unsigned char **freemem,
                                          unsigned char *limit,
                                          unsigned char *table,
                                          unsigned int table_size)
{
    struct acpi_20_xsdt *xsdt = acpi_xsdt_get(acpi_start);
    int found = 0, i = 0;
    unsigned char *addr = NULL;

    /* Check for an empty slot in the Xsdt table. */
    while ( i < ACPI_MAX_NUM_TABLES )
    {
        if ( xsdt->entry[i] == 0 )
        {
            found = 1;
            break;
        }
        i++;
    }

    if ( found )
    {
        /* memory below hard limit ? */
        if ( (*freemem + table_size) <= limit )
        {
            printf("Copying SSDT entry\n");
            addr = *freemem;
            memcpy(addr, table, table_size);
            *freemem += table_size;

            acpi_xsdt_add_entry_pointer(acpi_start, addr);
        }
    }

    return addr;
}


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