| /* |
| * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| |
| #include <arch/io.h> |
| #include <stdlib.h> |
| #include <console/console.h> |
| #include <soc/addressmap.h> |
| #include <soc/display.h> |
| #include <soc/id.h> |
| #include "mc.h" |
| #include "sdram.h" |
| |
| /* 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; |
| |
| printk(BIOS_DEBUG, "%s: Total SDRAM (MB): %u\n", __func__, total_size); |
| 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; |
| |
| switch (id) { |
| case CARVEOUT_TZ: |
| /* AVP does not have access to the TZ carveout registers. */ |
| if (context_avp()) |
| return; |
| carveout_from_regs(base_mib, size_mib, |
| read32(&mc->security_cfg0), |
| 0, |
| read32(&mc->security_cfg1)); |
| 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; |
| default: |
| break; |
| } |
| } |
| |
| void memory_range_by_bits(int bits, uintptr_t *base_mib, uintptr_t *end_mib) |
| { |
| uintptr_t base; |
| uintptr_t end; |
| int i; |
| |
| base = CONFIG_SYS_SDRAM_BASE / MiB; |
| end = base + sdram_size_mb(); |
| |
| if (bits == ADDRESS_SPACE_32_BIT) |
| end = MIN(end, 4096); |
| |
| for (i = 0; i < CARVEOUT_NUM; i++) { |
| uintptr_t carveout_base; |
| size_t carveout_size; |
| |
| carveout_range(i, &carveout_base, &carveout_size); |
| |
| if (carveout_size == 0) |
| continue; |
| |
| /* Bypass carveouts out of requested range. */ |
| if (carveout_base >= end) |
| 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; |
| } |
| |
| uintptr_t framebuffer_attributes(size_t *size_mib) |
| { |
| uintptr_t begin; |
| uintptr_t end; |
| |
| /* Place the framebuffer just below the 32-bit addressable limit. */ |
| memory_range_by_bits(ADDRESS_SPACE_32_BIT, &begin, &end); |
| |
| /* |
| * Need to take into account that the Trust Zone region is not able to |
| * be read by the AVP. The Trust Zone region will live just below the |
| * rest of the carveout regions. |
| */ |
| if (context_avp()) |
| end -= CONFIG_TRUSTZONE_CARVEOUT_SIZE_MB; |
| |
| *size_mib = FB_SIZE_MB; |
| end -= *size_mib; |
| |
| return end; |
| } |