diff options
Diffstat (limited to 'plat/mediatek/mt8186/drivers/emi_mpu/emi_mpu.c')
| -rw-r--r-- | plat/mediatek/mt8186/drivers/emi_mpu/emi_mpu.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/plat/mediatek/mt8186/drivers/emi_mpu/emi_mpu.c b/plat/mediatek/mt8186/drivers/emi_mpu/emi_mpu.c new file mode 100644 index 0000000..1133c86 --- /dev/null +++ b/plat/mediatek/mt8186/drivers/emi_mpu/emi_mpu.c @@ -0,0 +1,133 @@ +/* + * Copyright (c) 2021-2022, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <string.h> +#include <common/debug.h> +#include <lib/mmio.h> +#include <emi_mpu.h> + +#if ENABLE_EMI_MPU_SW_LOCK +static unsigned char region_lock_state[EMI_MPU_REGION_NUM]; +#endif + +#define EMI_MPU_START_MASK (0x00FFFFFF) +#define EMI_MPU_END_MASK (0x00FFFFFF) +#define EMI_MPU_APC_SW_LOCK_MASK (0x00FFFFFF) +#define EMI_MPU_APC_HW_LOCK_MASK (0x80FFFFFF) + +static int _emi_mpu_set_protection(unsigned int start, unsigned int end, + unsigned int apc) +{ + unsigned int dgroup; + unsigned int region; + + region = (start >> 24) & 0xFF; + start &= EMI_MPU_START_MASK; + dgroup = (end >> 24) & 0xFF; + end &= EMI_MPU_END_MASK; + + if ((region >= EMI_MPU_REGION_NUM) || (dgroup > EMI_MPU_DGROUP_NUM)) { + WARN("invalid region, domain\n"); + return -1; + } + +#if ENABLE_EMI_MPU_SW_LOCK + if (region_lock_state[region] == 1) { + WARN("invalid region\n"); + return -1; + } + + if ((dgroup == 0U) && ((apc >> 31) & 0x1)) { + region_lock_state[region] = 1; + } + + apc &= EMI_MPU_APC_SW_LOCK_MASK; +#else + apc &= EMI_MPU_APC_HW_LOCK_MASK; +#endif + + if ((start >= DRAM_OFFSET) && (end >= start)) { + start -= DRAM_OFFSET; + end -= DRAM_OFFSET; + } else { + WARN("invalid range\n"); + return -1; + } + + 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); + +#if defined(SUB_EMI_MPU_BASE) + mmio_write_32(SUB_EMI_MPU_SA(region), start); + mmio_write_32(SUB_EMI_MPU_EA(region), end); + mmio_write_32(SUB_EMI_MPU_APC(region, dgroup), apc); +#endif + return 0; +} + +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) { + WARN("invalid region\n"); + return -1; + } + + start = (unsigned int)(region_info->start >> EMI_MPU_ALIGN_BITS) | + (region_info->region << 24); + + for (i = EMI_MPU_DGROUP_NUM - 1; i >= 0; i--) { + end = (unsigned int)(region_info->end >> EMI_MPU_ALIGN_BITS) | (i << 24); + + if (_emi_mpu_set_protection(start, end, region_info->apc[i]) < 0) { + WARN("failed to set emi mpu protection(%d, %d, %d)\n", + start, end, region_info->apc[i]); + } + } + + return 0; +} + +void emi_mpu_init(void) +{ + struct emi_region_info_t region_info; + + /* SCP DRAM */ + region_info.start = 0x50000000ULL; + region_info.end = 0x5109FFFFULL; + region_info.region = 2; + SET_ACCESS_PERMISSION(region_info.apc, 1, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROTECTION, + FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROTECTION); + emi_mpu_set_protection(®ion_info); + + /* DSP protect address */ + region_info.start = 0x60000000ULL; /* dram base addr */ + region_info.end = 0x610FFFFFULL; + region_info.region = 3; + SET_ACCESS_PERMISSION(region_info.apc, 1, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, + FORBIDDEN, NO_PROTECTION, FORBIDDEN, FORBIDDEN, + FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROTECTION); + 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_PROTECTION); + emi_mpu_set_protection(®ion_info); +} |