diff options
Diffstat (limited to '')
| -rw-r--r-- | plat/mediatek/mt8192/drivers/emi_mpu/emi_mpu.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/plat/mediatek/mt8192/drivers/emi_mpu/emi_mpu.c b/plat/mediatek/mt8192/drivers/emi_mpu/emi_mpu.c new file mode 100644 index 0000000..26bed29 --- /dev/null +++ b/plat/mediatek/mt8192/drivers/emi_mpu/emi_mpu.c @@ -0,0 +1,144 @@ +/* + * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <common/debug.h> +#include <emi_mpu.h> +#include <lib/mmio.h> + +/* + * emi_mpu_set_region_protection: protect a region. + * @start: start address of the region + * @end: end address of the region + * @access_permission: EMI MPU access permission + * Return 0 for success, otherwise negative status code. + */ +static int _emi_mpu_set_protection( + unsigned long start, unsigned long end, + unsigned int apc) +{ + unsigned int dgroup; + unsigned int region; + + region = (start >> 24) & 0xFF; + start &= 0x00FFFFFF; + dgroup = (end >> 24) & 0xFF; + end &= 0x00FFFFFF; + + if ((region >= EMI_MPU_REGION_NUM) || (dgroup > EMI_MPU_DGROUP_NUM)) { + WARN("Region:%u or dgroup:%u is wrong!\n", region, dgroup); + return -1; + } + + apc &= 0x80FFFFFF; + + if ((start >= DRAM_OFFSET) && (end >= start)) { + start -= DRAM_OFFSET; + end -= DRAM_OFFSET; + } else { + WARN("start:0x%lx or end:0x%lx address is wrong!\n", + start, end); + return -2; + } + + mmio_write_32(EMI_MPU_SA(region), start); + mmio_write_32(EMI_MPU_EA(region), end); + mmio_write_32(EMI_MPU_APC(region, dgroup), apc); + + return 0; +} + +void dump_emi_mpu_regions(void) +{ + unsigned long apc[EMI_MPU_DGROUP_NUM], sa, ea; + + int region, i; + + /* Only dump 8 regions(max: EMI_MPU_REGION_NUM --> 32) */ + for (region = 0; region < 8; ++region) { + for (i = 0; i < EMI_MPU_DGROUP_NUM; ++i) + apc[i] = mmio_read_32(EMI_MPU_APC(region, i)); + sa = mmio_read_32(EMI_MPU_SA(region)); + ea = mmio_read_32(EMI_MPU_EA(region)); + + WARN("region %d:\n", region); + WARN("\tsa:0x%lx, ea:0x%lx, apc0: 0x%lx apc1: 0x%lx\n", + sa, ea, apc[0], apc[1]); + } +} + +int emi_mpu_set_protection(struct emi_region_info_t *region_info) +{ + unsigned long start, end; + int i; + + if (region_info->region >= EMI_MPU_REGION_NUM) + return -1; + + start = (unsigned long)(region_info->start >> EMI_MPU_ALIGN_BITS) | + (region_info->region << 24); + + for (i = EMI_MPU_DGROUP_NUM - 1; i >= 0; i--) { + end = (unsigned long)(region_info->end >> EMI_MPU_ALIGN_BITS) | + (i << 24); + _emi_mpu_set_protection(start, end, region_info->apc[i]); + } + + return 0; +} + +void emi_mpu_init(void) +{ + struct emi_region_info_t region_info; + + /* reserve region 0 for future use */ + + /* PCI-e protect address(64MB) */ + region_info.start = 0xC0000000ULL; + region_info.end = 0xC3FF0000ULL; + region_info.region = 1; + SET_ACCESS_PERMISSION(region_info.apc, 1, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, NO_PROT, NO_PROT); + emi_mpu_set_protection(®ion_info); + + /* SCP protect address */ + region_info.start = 0x50000000ULL; + region_info.end = 0x513F0000ULL; + region_info.region = 2; + SET_ACCESS_PERMISSION(region_info.apc, 1, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + NO_PROT, FORBIDDEN, FORBIDDEN, NO_PROT); + emi_mpu_set_protection(®ion_info); + + /* DSP protect address */ + region_info.start = 0x40000000ULL; /* dram base addr */ + region_info.end = 0x1FFFF0000ULL; + region_info.region = 3; + SET_ACCESS_PERMISSION(region_info.apc, 1, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROT); + emi_mpu_set_protection(®ion_info); + + /* Forbidden All */ + region_info.start = 0x40000000ULL; /* dram base addr */ + region_info.end = 0x1FFFF0000ULL; + region_info.region = 4; + SET_ACCESS_PERMISSION(region_info.apc, 1, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROT); + emi_mpu_set_protection(®ion_info); + + dump_emi_mpu_regions(); +} + |