From 2047390abc04b921764bd23eeffc0d3e83a2a674 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Fri, 17 Jun 2016 02:13:14 -0700 Subject: [PATCH] x86: baytrail: Introduce ACPI global NVS This introduces baytrail-specific ACPI global NVS structure, defined in both C header file and ASL file. Signed-off-by: Bin Meng Reviewed-by: George McCollister Tested-by: George McCollister Reviewed-by: Simon Glass --- arch/x86/cpu/baytrail/acpi.c | 26 +++++++++++++++++++ arch/x86/include/asm/acpi/global_nvs.h | 19 ++++++++++++++ .../asm/arch-baytrail/acpi/global_nvs.asl | 15 +++++++++++ .../include/asm/arch-baytrail/global_nvs.h | 21 +++++++++++++++ 4 files changed, 81 insertions(+) create mode 100644 arch/x86/include/asm/acpi/global_nvs.h create mode 100644 arch/x86/include/asm/arch-baytrail/acpi/global_nvs.asl create mode 100644 arch/x86/include/asm/arch-baytrail/global_nvs.h diff --git a/arch/x86/cpu/baytrail/acpi.c b/arch/x86/cpu/baytrail/acpi.c index 5ee4868cf8..fa92d8852e 100644 --- a/arch/x86/cpu/baytrail/acpi.c +++ b/arch/x86/cpu/baytrail/acpi.c @@ -5,10 +5,14 @@ */ #include +#include +#include +#include #include #include #include #include +#include #include 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; +} diff --git a/arch/x86/include/asm/acpi/global_nvs.h b/arch/x86/include/asm/acpi/global_nvs.h new file mode 100644 index 0000000000..7f2ffd49ec --- /dev/null +++ b/arch/x86/include/asm/acpi/global_nvs.h @@ -0,0 +1,19 @@ +/* + * Copyright (C) 2016, Bin Meng + * + * 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_ */ diff --git a/arch/x86/include/asm/arch-baytrail/acpi/global_nvs.asl b/arch/x86/include/asm/arch-baytrail/acpi/global_nvs.asl new file mode 100644 index 0000000000..a28d4dfade --- /dev/null +++ b/arch/x86/include/asm/arch-baytrail/acpi/global_nvs.asl @@ -0,0 +1,15 @@ +/* + * Copyright (C) 2016 Bin Meng + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include + +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 */ +} diff --git a/arch/x86/include/asm/arch-baytrail/global_nvs.h b/arch/x86/include/asm/arch-baytrail/global_nvs.h new file mode 100644 index 0000000000..56e362633f --- /dev/null +++ b/arch/x86/include/asm/arch-baytrail/global_nvs.h @@ -0,0 +1,21 @@ +/* + * Copyright (C) 2016, Bin Meng + * + * 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_ */ -- 2.30.2