GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)
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/*
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* Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <common/debug.h>
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#include <emi_mpu.h>
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#include <lib/mmio.h>
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/*
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* emi_mpu_set_region_protection: protect a region.
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* @start: start address of the region
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* @end: end address of the region
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* @access_permission: EMI MPU access permission
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* Return 0 for success, otherwise negative status code.
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*/
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static int _emi_mpu_set_protection(
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unsigned long start, unsigned long end,
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unsigned int apc)
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{
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unsigned int dgroup;
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unsigned int region;
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region = (start >> 24) & 0xFF;
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start &= 0x00FFFFFF;
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dgroup = (end >> 24) & 0xFF;
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end &= 0x00FFFFFF;
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if ((region >= EMI_MPU_REGION_NUM) || (dgroup > EMI_MPU_DGROUP_NUM)) {
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WARN("Region:%u or dgroup:%u is wrong!\n", region, dgroup);
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return -1;
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}
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apc &= 0x80FFFFFF;
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if ((start >= DRAM_OFFSET) && (end >= start)) {
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start -= DRAM_OFFSET;
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end -= DRAM_OFFSET;
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} else {
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WARN("start:0x%lx or end:0x%lx address is wrong!\n",
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start, end);
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return -2;
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}
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mmio_write_32(EMI_MPU_SA(region), start);
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mmio_write_32(EMI_MPU_EA(region), end);
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mmio_write_32(EMI_MPU_APC(region, dgroup), apc);
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return 0;
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}
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void dump_emi_mpu_regions(void)
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{
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unsigned long apc[EMI_MPU_DGROUP_NUM], sa, ea;
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int region, i;
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/* Only dump 8 regions(max: EMI_MPU_REGION_NUM --> 32) */
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for (region = 0; region < 8; ++region) {
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for (i = 0; i < EMI_MPU_DGROUP_NUM; ++i)
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apc[i] = mmio_read_32(EMI_MPU_APC(region, i));
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sa = mmio_read_32(EMI_MPU_SA(region));
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ea = mmio_read_32(EMI_MPU_EA(region));
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WARN("region %d:\n", region);
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WARN("\tsa:0x%lx, ea:0x%lx, apc0: 0x%lx apc1: 0x%lx\n",
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sa, ea, apc[0], apc[1]);
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}
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}
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int emi_mpu_set_protection(struct emi_region_info_t *region_info)
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{
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unsigned long start, end;
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int i;
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if (region_info->region >= EMI_MPU_REGION_NUM)
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return -1;
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start = (unsigned long)(region_info->start >> EMI_MPU_ALIGN_BITS) |
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(region_info->region << 24);
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for (i = EMI_MPU_DGROUP_NUM - 1; i >= 0; i--) {
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end = (unsigned long)(region_info->end >> EMI_MPU_ALIGN_BITS) |
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(i << 24);
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_emi_mpu_set_protection(start, end, region_info->apc[i]);
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}
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return 0;
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}
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void emi_mpu_init(void)
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{
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struct emi_region_info_t region_info;
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/* reserve region 0 for future use */
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/* PCI-e protect address(64MB) */
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region_info.start = 0xC0000000ULL;
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region_info.end = 0xC3FF0000ULL;
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region_info.region = 1;
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SET_ACCESS_PERMISSION(region_info.apc, 1,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, NO_PROT, NO_PROT);
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emi_mpu_set_protection(®ion_info);
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/* SCP protect address */
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region_info.start = 0x50000000ULL;
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region_info.end = 0x513F0000ULL;
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region_info.region = 2;
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SET_ACCESS_PERMISSION(region_info.apc, 1,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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NO_PROT, FORBIDDEN, FORBIDDEN, NO_PROT);
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emi_mpu_set_protection(®ion_info);
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/* DSP protect address */
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region_info.start = 0x40000000ULL; /* dram base addr */
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region_info.end = 0x1FFFF0000ULL;
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region_info.region = 3;
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SET_ACCESS_PERMISSION(region_info.apc, 1,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROT);
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emi_mpu_set_protection(®ion_info);
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/* Forbidden All */
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region_info.start = 0x40000000ULL; /* dram base addr */
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region_info.end = 0x1FFFF0000ULL;
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region_info.region = 4;
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SET_ACCESS_PERMISSION(region_info.apc, 1,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN,
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FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROT);
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emi_mpu_set_protection(®ion_info);
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dump_emi_mpu_regions();
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}
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+102
@@ -0,0 +1,102 @@
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/*
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* Copyright (c) 2020, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef EMI_MPU_H
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#define EMI_MPU_H
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#include <platform_def.h>
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#define EMI_MPUP (EMI_BASE + 0x01D8)
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#define EMI_MPUQ (EMI_BASE + 0x01E0)
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#define EMI_MPUR (EMI_BASE + 0x01E8)
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#define EMI_MPUS (EMI_BASE + 0x01F0)
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#define EMI_MPUT (EMI_BASE + 0x01F8)
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#define EMI_MPUY (EMI_BASE + 0x0220)
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#define EMI_MPU_CTRL (EMI_MPU_BASE + 0x0000)
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#define EMI_MPUD0_ST (EMI_BASE + 0x0160)
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#define EMI_MPUD1_ST (EMI_BASE + 0x0164)
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#define EMI_MPUD2_ST (EMI_BASE + 0x0168)
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#define EMI_MPUD3_ST (EMI_BASE + 0x016C)
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#define EMI_MPUD0_ST2 (EMI_BASE + 0x0200)
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#define EMI_MPUD1_ST2 (EMI_BASE + 0x0204)
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#define EMI_MPUD2_ST2 (EMI_BASE + 0x0208)
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#define EMI_MPUD3_ST2 (EMI_BASE + 0x020C)
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#define EMI_PHY_OFFSET (0x40000000UL)
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#define NO_PROT (0)
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#define SEC_RW (1)
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#define SEC_RW_NSEC_R (2)
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#define SEC_RW_NSEC_W (3)
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#define SEC_R_NSEC_R (4)
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#define FORBIDDEN (5)
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#define SEC_R_NSEC_RW (6)
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#define SECURE_OS_MPU_REGION_ID (0)
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#define ATF_MPU_REGION_ID (1)
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#define EMI_MPU_SA0 (EMI_MPU_BASE + 0x100)
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#define EMI_MPU_EA0 (EMI_MPU_BASE + 0x200)
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#define EMI_MPU_SA(region) (EMI_MPU_SA0 + (region) * 4)
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#define EMI_MPU_EA(region) (EMI_MPU_EA0 + (region) * 4)
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#define EMI_MPU_APC0 (EMI_MPU_BASE + 0x300)
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#define EMI_MPU_APC(region, dgroup) (EMI_MPU_APC0 + (region) * 4 + \
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(dgroup) * 0x100)
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#define EMI_MPU_CTRL_D0 (EMI_MPU_BASE + 0x800)
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#define EMI_MPU_CTRL_D(domain) (EMI_MPU_CTRL_D0 + domain * 4)
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#define EMI_RG_MASK_D0 (EMI_MPU_BASE + 0x900)
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#define EMI_RG_MASK_D(domain) (EMI_RG_MASK_D0 + domain * 4)
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#define EMI_MPU_DOMAIN_NUM 16
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#define EMI_MPU_REGION_NUM 32
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#define EMI_MPU_ALIGN_BITS 16
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#define DRAM_OFFSET (0x40000000 >> EMI_MPU_ALIGN_BITS)
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#define EMI_MPU_DGROUP_NUM (EMI_MPU_DOMAIN_NUM / 8)
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#if (EMI_MPU_DGROUP_NUM == 1)
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#define SET_ACCESS_PERMISSION(apc_ary, lock, d7, d6, d5, d4, d3, d2, d1, d0) \
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do { \
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apc_ary[0] = 0; \
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apc_ary[0] = \
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(((unsigned int) d7) << 21) | (((unsigned int) d6) << 18) \
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| (((unsigned int) d5) << 15) | (((unsigned int) d4) << 12) \
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| (((unsigned int) d3) << 9) | (((unsigned int) d2) << 6) \
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| (((unsigned int) d1) << 3) | ((unsigned int) d0) \
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| (((unsigned int) lock) << 31); \
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} while (0)
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#elif (EMI_MPU_DGROUP_NUM == 2)
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#define SET_ACCESS_PERMISSION(apc_ary, lock, d15, d14, d13, d12, d11, d10, \
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d9, d8, d7, d6, d5, d4, d3, d2, d1, d0) \
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do { \
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apc_ary[1] = \
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(((unsigned int) d15) << 21) | (((unsigned int) d14) << 18) \
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| (((unsigned int) d13) << 15) | (((unsigned int) d12) << 12) \
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| (((unsigned int) d11) << 9) | (((unsigned int) d10) << 6) \
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| (((unsigned int) d9) << 3) | ((unsigned int) d8); \
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apc_ary[0] = \
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(((unsigned int) d7) << 21) | (((unsigned int) d6) << 18) \
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| (((unsigned int) d5) << 15) | (((unsigned int) d4) << 12) \
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| (((unsigned int) d3) << 9) | (((unsigned int) d2) << 6) \
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| (((unsigned int) d1) << 3) | ((unsigned int) d0) \
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| (((unsigned int) lock) << 31); \
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} while (0)
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#endif
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struct emi_region_info_t {
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unsigned long long start;
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unsigned long long end;
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unsigned int region;
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unsigned long apc[EMI_MPU_DGROUP_NUM];
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};
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void emi_mpu_init(void);
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int emi_mpu_set_protection(struct emi_region_info_t *region_info);
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void dump_emi_mpu_regions(void);
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#endif /* __EMI_MPU_H */
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