/*
 *
 * (C) COPYRIGHT 2011-2012 ARM Limited. All rights reserved.
 *
 * This program is free software and is provided to you under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation, and any use by you of this program is subject to the terms
 * of such GNU licence.
 *
 * A copy of the licence is included with the program, and can also be obtained
 * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 *
 */



/**
 * @file mali_kbase_cpuprops.c
 * Base kernel property query APIs
 */

#include "mali_kbase.h"
#include "mali_kbase_cpuprops.h"
#include "mali_kbase_uku.h"
#include <kbase/mali_kbase_config.h>
#include <linux/cache.h>
#include <asm/cputype.h>

#define L1_DCACHE_LINE_SIZE_LOG2 L1_CACHE_SHIFT

/**
 * @brief Macros used to extract cpu id info
 * @see Doc's for Main ID register
 */
#define KBASE_CPUPROPS_ID_GET_REV(cpuid)    (  (cpuid) & 0x0F         )  /* [3:0]   Revision                            */
#define KBASE_CPUPROPS_ID_GET_PART_NR(cpuid)( ((cpuid) >>  4) & 0xFFF )  /* [15:4]  Part number                         */
#define KBASE_CPUPROPS_ID_GET_ARCH(cpuid)   ( ((cpuid) >> 16) & 0x0F  )  /* [19:16] Architecture                        */
#define KBASE_CPUPROPS_ID_GET_VARIANT(cpuid)( ((cpuid) >> 20) & 0x0F  )  /* [23:20] Variant                             */
#define KBASE_CPUPROPS_ID_GET_CODE(cpuid)   ( ((cpuid) >> 24) & 0xFF  )  /* [31:23] ASCII code of implementer trademark */

/*Below value sourced from OSK*/
#define L1_DCACHE_SIZE ((u32)0x00008000)


/**
 * @brief Retrieves detailed CPU info from given cpu_val ( ID reg )
 *
 * @param kbase_props CPU props to be filled-in with cpu id info
 * @param cpu_val     CPU ID info
 *
 */
static void kbasep_cpuprops_uk_get_cpu_id_info(kbase_uk_cpuprops * const kbase_props, u32 cpu_val)
{
	kbase_props->props.cpu_id.id           = cpu_val;

	kbase_props->props.cpu_id.rev          = KBASE_CPUPROPS_ID_GET_REV(cpu_val);
	kbase_props->props.cpu_id.part         = KBASE_CPUPROPS_ID_GET_PART_NR(cpu_val);
	kbase_props->props.cpu_id.arch         = KBASE_CPUPROPS_ID_GET_ARCH(cpu_val);
	kbase_props->props.cpu_id.variant      = KBASE_CPUPROPS_ID_GET_VARIANT(cpu_val);
	kbase_props->props.cpu_id.implementer  = KBASE_CPUPROPS_ID_GET_CODE(cpu_val);

}

int kbase_cpuprops_get_default_clock_speed(u32 * const clock_speed)
{
	KBASE_DEBUG_ASSERT(NULL != clock_speed);

	*clock_speed = 100;
	return 0;
}

mali_error kbase_cpuprops_uk_get_props(kbase_context *kctx, kbase_uk_cpuprops * const kbase_props)
{
	int result;
	kbase_cpuprops_clock_speed_function kbase_cpuprops_uk_get_clock_speed;

	kbase_props->props.cpu_l1_dcache_line_size_log2 = L1_DCACHE_LINE_SIZE_LOG2;
	kbase_props->props.cpu_l1_dcache_size = L1_DCACHE_SIZE;
	kbase_props->props.cpu_flags = BASE_CPU_PROPERTY_FLAG_LITTLE_ENDIAN;

	kbase_props->props.nr_cores = NR_CPUS;
	kbase_props->props.cpu_page_size_log2 = PAGE_SHIFT;
	kbase_props->props.available_memory_size = totalram_pages << PAGE_SHIFT;

	kbasep_cpuprops_uk_get_cpu_id_info(kbase_props, read_cpuid_id());

	kbase_cpuprops_uk_get_clock_speed = (kbase_cpuprops_clock_speed_function) kbasep_get_config_value(kctx->kbdev, kctx->kbdev->config_attributes, KBASE_CONFIG_ATTR_CPU_SPEED_FUNC);
	result = kbase_cpuprops_uk_get_clock_speed(&kbase_props->props.max_cpu_clock_speed_mhz);
	if (result != 0)
		return MALI_ERROR_FUNCTION_FAILED;

	return MALI_ERROR_NONE;
}