| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2014 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc. |
| */ |
| |
| #include <assert.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <soc/addressmap.h> |
| #include <soc/id.h> |
| #include <soc/mc.h> |
| #include <soc/sdram.h> |
| #include <stdlib.h> |
| #include <symbols.h> |
| #include <soc/nvidia/tegra/types.h> |
| |
| static uintptr_t tz_base_mib; |
| static const size_t tz_size_mib = CONFIG_TRUSTZONE_CARVEOUT_SIZE_MB; |
| |
| /* returns total amount of DRAM (in MB) from memory controller registers */ |
| int sdram_size_mb(void) |
| { |
| struct tegra_mc_regs *mc = (struct tegra_mc_regs *)TEGRA_MC_BASE; |
| static int total_size = 0; |
| |
| if (total_size) |
| return total_size; |
| |
| /* |
| * This obtains memory size from the External Memory Aperture |
| * Configuration register. Nvidia confirmed that it is safe to assume |
| * this value represents the total physical DRAM size. |
| */ |
| total_size = (read32(&mc->emem_cfg) >> |
| MC_EMEM_CFG_SIZE_MB_SHIFT) & MC_EMEM_CFG_SIZE_MB_MASK; |
| |
| return total_size; |
| } |
| |
| static void carveout_from_regs(uintptr_t *base_mib, size_t *size_mib, |
| uint32_t bom, uint32_t bom_hi, uint32_t size) |
| { |
| |
| /* All size regs of carveouts are in MiB. */ |
| if (size == 0) |
| return; |
| |
| *size_mib = size; |
| bom >>= 20; |
| bom |= bom_hi << (32 - 20); |
| |
| *base_mib = bom; |
| } |
| |
| void carveout_range(int id, uintptr_t *base_mib, size_t *size_mib) |
| { |
| *base_mib = 0; |
| *size_mib = 0; |
| struct tegra_mc_regs * const mc = (struct tegra_mc_regs *)TEGRA_MC_BASE; |
| size_t region_size_mb; |
| |
| switch (id) { |
| case CARVEOUT_TZ: |
| *base_mib = tz_base_mib; |
| *size_mib = tz_size_mib; |
| break; |
| case CARVEOUT_SEC: |
| carveout_from_regs(base_mib, size_mib, |
| read32(&mc->sec_carveout_bom), |
| read32(&mc->sec_carveout_adr_hi), |
| read32(&mc->sec_carveout_size_mb)); |
| break; |
| case CARVEOUT_MTS: |
| carveout_from_regs(base_mib, size_mib, |
| read32(&mc->mts_carveout_bom), |
| read32(&mc->mts_carveout_adr_hi), |
| read32(&mc->mts_carveout_size_mb)); |
| break; |
| case CARVEOUT_VPR: |
| carveout_from_regs(base_mib, size_mib, |
| read32(&mc->video_protect_bom), |
| read32(&mc->video_protect_bom_adr_hi), |
| read32(&mc->video_protect_size_mb)); |
| break; |
| case CARVEOUT_GPU: |
| /* These carveout regs use 128KB granularity - convert to MB */ |
| region_size_mb = DIV_ROUND_UP(read32(&mc->security_carveout2_size_128kb), 8); |
| |
| /* BOM address set in gpu_region_init, below */ |
| carveout_from_regs(base_mib, size_mib, |
| read32(&mc->security_carveout2_bom), |
| read32(&mc->security_carveout2_bom_hi), |
| region_size_mb); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| void print_carveouts(void) |
| { |
| int i; |
| printk(BIOS_INFO, "Carveout ranges:\n"); |
| for (i = 0; i < CARVEOUT_NUM; i++) { |
| uintptr_t base, end; |
| size_t size; |
| carveout_range(i, &base, &size); |
| end = base + size; |
| if (end && base) |
| printk(BIOS_INFO, "ID:%d [%lx - %lx)\n", i, |
| (unsigned long)base * MiB, |
| (unsigned long)end * MiB); |
| } |
| } |
| |
| /* |
| * Memory Map is as follows |
| * |
| * ------------------------------ <-- Start of DRAM |
| * | | |
| * | Available DRAM | |
| * |____________________________| |
| * | | |
| * | CBMEM | |
| * |____________________________| |
| * | | |
| * | Other carveouts | |
| * | (with dynamic allocation) | |
| * |____________________________| |
| * | | |
| * | TZ carveout of size | |
| * | TRUSTZONE_CARVEOUT_SIZE_MB | |
| * |____________________________| <-- 0x100000000 |
| * | | |
| * | Available DRAM | |
| * | | |
| * ------------------------------ <-- End of DRAM |
| * |
| */ |
| static void memory_in_range(uintptr_t *base_mib, uintptr_t *end_mib, |
| int ignore_carveout_id) |
| { |
| uintptr_t base; |
| uintptr_t end; |
| int i; |
| |
| base = (uintptr_t)_dram / MiB; |
| end = base + sdram_size_mb(); |
| |
| /* Requested limits out of range. */ |
| if (*end_mib <= base || *base_mib >= end) { |
| *end_mib = *base_mib = 0; |
| return; |
| } |
| |
| /* Clip region to passed in limits. */ |
| if (*end_mib < end) |
| end = *end_mib; |
| if (*base_mib > base) |
| base = *base_mib; |
| |
| for (i = 0; i < CARVEOUT_NUM; i++) { |
| uintptr_t carveout_base; |
| uintptr_t carveout_end; |
| size_t carveout_size; |
| |
| if (i == ignore_carveout_id) |
| continue; |
| |
| carveout_range(i, &carveout_base, &carveout_size); |
| |
| if (carveout_size == 0) |
| continue; |
| |
| carveout_end = carveout_base + carveout_size; |
| |
| /* Bypass carveouts out of requested range. */ |
| if (carveout_base >= end || carveout_end <= base) |
| continue; |
| |
| /* |
| * This is crude, but the assumption is that carveouts live |
| * at the upper range of physical memory. Therefore, update |
| * the end address to be equal to the base of the carveout. |
| */ |
| end = carveout_base; |
| } |
| |
| *base_mib = base; |
| *end_mib = end; |
| } |
| |
| void memory_in_range_below_4gb(uintptr_t *base_mib, uintptr_t *end_mib) |
| { |
| *base_mib = 0; |
| *end_mib = 4096; |
| memory_in_range(base_mib, end_mib, CARVEOUT_NUM); |
| } |
| |
| void memory_in_range_above_4gb(uintptr_t *base_mib, uintptr_t *end_mib) |
| { |
| *base_mib = 4096; |
| *end_mib = ~0UL; |
| memory_in_range(base_mib, end_mib, CARVEOUT_NUM); |
| } |
| |
| void trustzone_region_init(void) |
| { |
| struct tegra_mc_regs * const mc = (void *)(uintptr_t)TEGRA_MC_BASE; |
| uintptr_t end = 4096; |
| |
| /* Already has been initialized. */ |
| if (tz_size_mib != 0 && tz_base_mib != 0) |
| return; |
| |
| /* |
| * Get memory layout below 4GiB ignoring the TZ carveout because |
| * that's the one to initialize. |
| */ |
| tz_base_mib = end - tz_size_mib; |
| memory_in_range(&tz_base_mib, &end, CARVEOUT_TZ); |
| |
| /* |
| * IMPORTANT!!!!! |
| * We need to ensure that trustzone region is located at the end of |
| * 32-bit address space. If any carveout is allocated space before |
| * trustzone_region_init is called, then this assert will ensure that |
| * the boot flow fails. If you are here because of this assert, please |
| * move your call to initialize carveout after trustzone_region_init in |
| * romstage and ramstage. |
| */ |
| assert(end == 4096); |
| |
| /* AVP cannot set the TZ registers proper as it is always non-secure. */ |
| if (context_avp()) |
| return; |
| |
| /* Set the carveout region. */ |
| write32(&mc->security_cfg0, tz_base_mib << 20); |
| write32(&mc->security_cfg1, tz_size_mib); |
| |
| /* Enable SMMU translations */ |
| write32(&mc->smmu_config, MC_SMMU_CONFIG_ENABLE); |
| } |
| |
| void gpu_region_init(void) |
| { |
| struct tegra_mc_regs * const mc = (void *)(uintptr_t)TEGRA_MC_BASE; |
| uintptr_t gpu_base_mib = 0, end = 4096; |
| size_t gpu_size_mib = GPU_CARVEOUT_SIZE_MB; |
| |
| /* Get memory layout below 4GiB */ |
| memory_in_range(&gpu_base_mib, &end, CARVEOUT_GPU); |
| gpu_base_mib = end - gpu_size_mib; |
| |
| /* Set the carveout2 base address. Everything else has been set in the BCT cfg/inc */ |
| write32(&mc->security_carveout2_bom, gpu_base_mib << 20); |
| write32(&mc->security_carveout2_bom_hi, 0); |
| |
| /* Set the locked bit. This will lock out any other writes! */ |
| setbits_le32(&mc->security_carveout2_cfg0, MC_SECURITY_CARVEOUT_LOCKED); |
| |
| /* Set the carveout3 base to 0, unused */ |
| write32(&mc->security_carveout3_bom, 0); |
| write32(&mc->security_carveout3_bom_hi, 0); |
| |
| /* Set the locked bit. This will lock out any other writes! */ |
| setbits_le32(&mc->security_carveout3_cfg0, MC_SECURITY_CARVEOUT_LOCKED); |
| } |