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x86: baytrail: Introduce ACPI global NVS

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This introduces baytrail-specific ACPI global NVS structure, defined in
both C header file and ASL file.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: George McCollister <george.mccollister@gmail.com>
Tested-by: George McCollister <george.mccollister@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2016-06-17 02:13:14 -07:00
parent f2a751beba
commit 2047390abc
4 changed files with 81 additions and 0 deletions
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26
arch/x86/cpu/baytrail/acpi.c
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@ -5,10 +5,14 @@
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <dm/uclass-internal.h>
#include <asm/acpi_table.h>
#include <asm/ioapic.h>
#include <asm/mpspec.h>
#include <asm/tables.h>
#include <asm/arch/global_nvs.h>
#include <asm/arch/iomap.h>
void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
@ -161,3 +165,25 @@ u32 acpi_fill_madt(u32 current)
return current;
}
void acpi_create_gnvs(struct acpi_global_nvs *gnvs)
{
struct udevice *dev;
int ret;
/* at least we have one processor */
gnvs->pcnt = 1;
/* override the processor count with actual number */
ret = uclass_find_first_device(UCLASS_CPU, &dev);
if (ret == 0 && dev != NULL) {
ret = cpu_get_count(dev);
if (ret > 0)
gnvs->pcnt = ret;
}
/* determine whether internal uart is on */
if (IS_ENABLED(CONFIG_INTERNAL_UART))
gnvs->iuart_en = 1;
else
gnvs->iuart_en = 0;
}

19
arch/x86/include/asm/acpi/global_nvs.h Normal file
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@ -0,0 +1,19 @@
/*
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _ACPI_GNVS_H_
#define _ACPI_GNVS_H_
/*
* This file provides two ACPI global NVS macros: ACPI_GNVS_ADDR and
* ACPI_GNVS_SIZE. They are to be used in platform's global_nvs.asl file
* to declare the GNVS OperationRegion, as well as write_acpi_tables()
* for the GNVS address runtime fix up.
*/
#define ACPI_GNVS_ADDR 0xdeadbeef
#define ACPI_GNVS_SIZE 0x100
#endif /* _ACPI_GNVS_H_ */

15
arch/x86/include/asm/arch-baytrail/acpi/global_nvs.asl Normal file
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@ -0,0 +1,15 @@
/*
* Copyright (C) 2016 Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/acpi/global_nvs.h>
OperationRegion(GNVS, SystemMemory, ACPI_GNVS_ADDR, ACPI_GNVS_SIZE)
Field(GNVS, ByteAcc, NoLock, Preserve)
{
Offset (0x00),
PCNT, 8, /* processor count */
IURE, 8, /* internal UART enabled */
}

21
arch/x86/include/asm/arch-baytrail/global_nvs.h Normal file
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@ -0,0 +1,21 @@
/*
* Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _GLOBAL_NVS_H_
#define _GLOBAL_NVS_H_
struct __packed acpi_global_nvs {
u8 pcnt; /* processor count */
u8 iuart_en; /* internal UART enabled */
/*
* Add padding so sizeof(struct acpi_global_nvs) == 0x100.
* This must match the size defined in the global_nvs.asl.
*/
u8 rsvd[254];
};
#endif /* _GLOBAL_NVS_H_ */