mtk-lk/platform/common/emi/emi_mpu_v2.c

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#include <debug.h>
#include <plat_debug_interface.h>
#include <emi/emi_mpu_v2.h>

#ifndef MTK_SMC_ID_MGMT
#define MTK_SIP_KERNEL_EMIMPU_SET	0x82000262
#define MTK_SIP_KERNEL_EMIMPU_CLEAR	0x82000263
#endif

#define DBG_EMI(x...) dprintf(INFO, x)
#ifdef MTK_SMC_ID_MGMT
#define emi_mpu_smc_set(start, end, apc) \
    mt_secure_call(MTK_SIP_KERNEL_EMIMPU_SET, start, end, apc, 0)
#define emi_mpu_smc_clear(region) \
    mt_secure_call(MTK_SIP_KERNEL_EMIMPU_CLEAR, region, 0, 0, 0)
#else
#define emi_mpu_smc_set(start, end, apc) \
    mt_secure_call(MTK_SIP_KERNEL_EMIMPU_SET, start, end, apc)
#define emi_mpu_smc_clear(region) \
    mt_secure_call(MTK_SIP_KERNEL_EMIMPU_CLEAR, region, 0, 0)
#endif
int emi_mpu_set_protection(struct emi_region_info_t *region_info)
{
	unsigned int start, end;
	int i;

	if (region_info->region >= EMI_MPU_REGION_NUM) {
		DBG_EMI("EMI MPU can not support region %u\n",
			region_info->region);
		return -1;
	}

	start = (unsigned int)(region_info->start >> EMI_MPU_ALIGN_BITS) |
		(region_info->region << 24);

	DBG_EMI("LK emi_mpu_set_protection start:%llx end=%llx region=%u ",
		region_info->start, region_info->end, region_info->region);

	for (i = EMI_MPU_DGROUP_NUM - 1; i >= 0; i--) {
		end = (unsigned int)(region_info->end >> EMI_MPU_ALIGN_BITS) |
			(i << 24);
		emi_mpu_smc_set(start, end, region_info->apc[i]);
		DBG_EMI("apc%d=%x ", i, region_info->apc[i]);
	}

	DBG_EMI("\n");

	return 0;
}

int emi_mpu_clear_protection(struct emi_region_info_t *region_info)
{
	if (region_info->region >= EMI_MPU_REGION_NUM) {
		DBG_EMI("EMI MPU can not support region %u\n",
			region_info->region);
		return -1;
	}

	emi_mpu_smc_clear(region_info->region);

	return 0;
}