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6c4973b0a9
Forbidden domain D4(DSP) access 0x40000000~0x1FFFF0000. Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com> Change-Id: If409df10cecbcccc493d7958ab2765fd110d9009
144 lines
3.9 KiB
C
144 lines
3.9 KiB
C
/*
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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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