[03/10] acpi: rsdp: add SBBR compliance tests

Server Base Boot Requirements (SBBR) specification is
intended for SBSA- compliant 64-bit ARMv8 servers.
It defines the base firmware requirements for out-of-box support
of any ARM SBSA-compatible Operating System or hypervisor. The requirements
in this specification are expected to be minimal yet complete for
booting a multi-core ARMv8 server platform, while leaving plenty of
room for OEM or ODM innovations and design details.
For more information, download the SBBR specification here:
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044b/index.html

This change introduces test cases as per SBBR specification to rsdp acpi.

Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
Signed-off-by: Sakar Arora <Sakar.Arora@arm.com>
---
 src/Makefile.am      |   1 +
 src/sbbr/rsdp/rsdp.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 135 insertions(+)
 create mode 100644 src/sbbr/rsdp/rsdp.c

On 2017-07-24 11:10 PM, Sakar Arora wrote:
> Server Base Boot Requirements (SBBR) specification is
> intended for SBSA- compliant 64-bit ARMv8 servers.
> It defines the base firmware requirements for out-of-box support
> of any ARM SBSA-compatible Operating System or hypervisor. The requirements
> in this specification are expected to be minimal yet complete for
> booting a multi-core ARMv8 server platform, while leaving plenty of
> room for OEM or ODM innovations and design details.
> For more information, download the SBBR specification here:
> http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0044b/index.html
> 
> This change introduces test cases as per SBBR specification to rsdp acpi.
> 
> Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh@arm.com>
> Signed-off-by: Sakar Arora <Sakar.Arora@arm.com>
> ---
>   src/Makefile.am      |   1 +
>   src/sbbr/rsdp/rsdp.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++
>   2 files changed, 135 insertions(+)
>   create mode 100644 src/sbbr/rsdp/rsdp.c
> 
> diff --git a/src/Makefile.am b/src/Makefile.am
> index ca0a449..bd38841 100644
> --- a/src/Makefile.am
> +++ b/src/Makefile.am
> @@ -97,6 +97,7 @@ fwts_SOURCES = main.c 				\
>   	acpi/plddump/plddump.c			\
>   	acpi/pmtt/pmtt.c 			\
>   	acpi/rsdp/rsdp.c			\
> +	sbbr/rsdp/rsdp.c			\
>   	acpi/rsdt/rsdt.c			\
>   	acpi/s3/s3.c 				\
>   	acpi/s3power/s3power.c 			\
> diff --git a/src/sbbr/rsdp/rsdp.c b/src/sbbr/rsdp/rsdp.c
> new file mode 100644
> index 0000000..2e54e98
> --- /dev/null
> +++ b/src/sbbr/rsdp/rsdp.c
> @@ -0,0 +1,134 @@
> +/*
> + * Copyright (C) 2015-2017 Canonical
> + * Copyright (C) 2017 ARM Ltd
> + *
> + * Portions of this code original from the Linux-ready Firmware Developer Kit
> + *
> + * 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; either version 2
> + * of the License, or (at your option) any later version.
> + *
> + * 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 "fwts.h"
> +
> +#if defined(FWTS_HAS_ACPI)
> +
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <unistd.h>
> +#include <inttypes.h>
> +#include <string.h>
> +#include <ctype.h>
> +
> +static fwts_acpi_table_info *table;
> +
> +static int rsdp_sbbr_init(fwts_framework *fw)
> +{
> +	if (fwts_acpi_find_table(fw, "RSDP", 0, &table) != FWTS_OK) {
> +		fwts_log_error(fw, "Cannot read ACPI tables.");
> +		return FWTS_ERROR;
> +	}
> +	if (!table) {
> +
> +			fwts_log_error(fw,
> +				       "ACPI RSDP is required for the "
> +				       "%s target architecture.",
> +				       fwts_arch_get_name(fw->target_arch));
> +			return FWTS_ERROR;
> +	}
> +
> +	/* We know there is an RSDP now, so do a quick sanity check */
> +	if (table->length == 0) {
> +		fwts_log_error(fw,
> +			       "ACPI RSDP table has zero length");
> +		return FWTS_ERROR;
> +	}
> +	return FWTS_OK;
> +}
> +
> +/*
> + *  RSDP Root System Description Pointer
> + */
> +static int rsdp_sbbr_test1(fwts_framework *fw)
> +{
> +	fwts_acpi_table_rsdp *rsdp = (fwts_acpi_table_rsdp *)table->data;
> +	uint8_t checksum;
> +
> +	/*This includes only the first 20 bytes of this table, bytes
> +	0 to 19, including the checksum field. These bytes must sum to
> +	zero. */
> +	const char RSDP_SIGNATURE[]  = {'R', 'S', 'D', ' ', 'P', 'T', 'R', ' '};
> +	bool signature_pass             = false;
> +	const int CHECKSUM_BYTES        = 20;
> +	bool  checksum_pass             = false;
> +	const int SBBR_RSDP_REVISION    = 2;
> +	bool  rsdp_revision_pass        = false;
> +	const uint32_t SBBR_RSDP_LENGTH = 36;
> +	bool  rsdp_length_pass          = false;
> +	const int EXT_CHECKSUM_BYTES    = 36;
> +	bool  ext_checksum_pass         = false;
> +	bool xsdt_address_pass          = false;
> +
> +	fwts_log_info(fw, "RSDP Signature = %.8s", rsdp->signature);
> +	signature_pass = strncmp(rsdp->signature, RSDP_SIGNATURE, sizeof(rsdp->signature))? false : true;
> +
> +	/* verify first checksum */
> +	checksum = fwts_checksum(table->data, CHECKSUM_BYTES);
> +	fwts_log_info(fw, "RSDP Checksum = 0x%x", checksum);
> +	checksum_pass = (checksum == 0)? true : false;
> +
> +	fwts_log_info(fw, "RSDP Revision = 0x%x", rsdp->revision);
> +	rsdp_revision_pass = (rsdp->revision >= SBBR_RSDP_REVISION)? true : false;
> +
> +	fwts_log_info(fw, "RSDP Length = 0x%x", rsdp->length);
> +	rsdp_length_pass = (rsdp->length == SBBR_RSDP_LENGTH)? true : false;
> +
> +	checksum = fwts_checksum(table->data, EXT_CHECKSUM_BYTES);
> +	fwts_log_info(fw, "RSDP Extended Checksum = 0x%x", checksum);
> +	ext_checksum_pass = (checksum == 0)? true : false;
> +
> +	if ( (rsdp->xsdt_address != 0) &&
> +	     (rsdp->rsdt_address == 0)    )
> +	{
> +		xsdt_address_pass = true;
> +	}
> +

We normally do not have a space in conditions like above, and the curly 
brace should in the same line. I think two conditions can fit into a 
single line and it is less than 80 chars if that's the reason you split 
into two lines. For example:

         if ((rsdp->xsdt_address != 0) && (rsdp->rsdt_address == 0)) {
                 xsdt_address_pass = true;
         }


> +    if ( (signature_pass     == true) &&
> +		 (checksum_pass      == true) &&
> +		 (rsdp_revision_pass == true) &&
> +		 (rsdp_length_pass   == true) &&
> +		 (ext_checksum_pass  == true) &&
> +		 (xsdt_address_pass  == true)    )
> +    {
> +	fwts_passed(fw, "SBBR: Structure of RSDP Table is consistent with ACPI 6.0 or later and uses 64 bit xsdt addresses.");
> +    }
> +    else
> +    {
> +	fwts_failed(fw, LOG_LEVEL_CRITICAL,
> +				"SBBR RSDP:",
> +				"Structure of RSDP Table is not consistent with ACPI 6.0 or later and/or does not use 64 bit xsdt addresses.");
> +    }

The above lines have incorrect indentation, and the spaces, alignment 
and curly braces should be fixed too.

> +
> +	return FWTS_OK;
> +}
> +
> +static fwts_framework_minor_test rsdp_sbbr_tests[] = {
> +	{ rsdp_sbbr_test1, "RSDP Root System Description Pointer test." },
> +	{ NULL, NULL }
> +};
> +
> +static fwts_framework_ops rsdp_sbbr_ops = {
> +	.description = "SBBR RSDP Root System Description Pointer tests.",
> +	.init        = rsdp_sbbr_init,
> +	.minor_tests = rsdp_sbbr_tests
> +};
> +
> +FWTS_REGISTER("rsdp_sbbr", &rsdp_sbbr_ops, FWTS_TEST_ANYTIME, FWTS_FLAG_TEST_SBBR)
> +
> +#endif
>