/* * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of ARM nor the names of its contributors may be used * to endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #define TEGRA_GPU_RESET_REG_OFFSET 0x30 #define GPU_RESET_BIT (1 << 0) /* Video Memory base and size (live values) */ static uint64_t video_mem_base; static uint64_t video_mem_size; /* array to hold stream_id override config register offsets */ const static uint32_t streamid_overrides[] = { MC_STREAMID_OVERRIDE_CFG_PTCR, MC_STREAMID_OVERRIDE_CFG_AFIR, MC_STREAMID_OVERRIDE_CFG_HDAR, MC_STREAMID_OVERRIDE_CFG_HOST1XDMAR, MC_STREAMID_OVERRIDE_CFG_NVENCSRD, MC_STREAMID_OVERRIDE_CFG_SATAR, MC_STREAMID_OVERRIDE_CFG_MPCORER, MC_STREAMID_OVERRIDE_CFG_NVENCSWR, MC_STREAMID_OVERRIDE_CFG_AFIW, MC_STREAMID_OVERRIDE_CFG_SATAW, MC_STREAMID_OVERRIDE_CFG_MPCOREW, MC_STREAMID_OVERRIDE_CFG_SATAW, MC_STREAMID_OVERRIDE_CFG_HDAW, MC_STREAMID_OVERRIDE_CFG_ISPRA, MC_STREAMID_OVERRIDE_CFG_ISPWA, MC_STREAMID_OVERRIDE_CFG_ISPWB, MC_STREAMID_OVERRIDE_CFG_XUSB_HOSTR, MC_STREAMID_OVERRIDE_CFG_XUSB_HOSTW, MC_STREAMID_OVERRIDE_CFG_XUSB_DEVR, MC_STREAMID_OVERRIDE_CFG_XUSB_DEVW, MC_STREAMID_OVERRIDE_CFG_TSECSRD, MC_STREAMID_OVERRIDE_CFG_TSECSWR, MC_STREAMID_OVERRIDE_CFG_GPUSRD, MC_STREAMID_OVERRIDE_CFG_GPUSWR, MC_STREAMID_OVERRIDE_CFG_SDMMCRA, MC_STREAMID_OVERRIDE_CFG_SDMMCRAA, MC_STREAMID_OVERRIDE_CFG_SDMMCR, MC_STREAMID_OVERRIDE_CFG_SDMMCRAB, MC_STREAMID_OVERRIDE_CFG_SDMMCWA, MC_STREAMID_OVERRIDE_CFG_SDMMCWAA, MC_STREAMID_OVERRIDE_CFG_SDMMCW, MC_STREAMID_OVERRIDE_CFG_SDMMCWAB, MC_STREAMID_OVERRIDE_CFG_VICSRD, MC_STREAMID_OVERRIDE_CFG_VICSWR, MC_STREAMID_OVERRIDE_CFG_VIW, MC_STREAMID_OVERRIDE_CFG_NVDECSRD, MC_STREAMID_OVERRIDE_CFG_NVDECSWR, MC_STREAMID_OVERRIDE_CFG_APER, MC_STREAMID_OVERRIDE_CFG_APEW, MC_STREAMID_OVERRIDE_CFG_NVJPGSRD, MC_STREAMID_OVERRIDE_CFG_NVJPGSWR, MC_STREAMID_OVERRIDE_CFG_SESRD, MC_STREAMID_OVERRIDE_CFG_SESWR, MC_STREAMID_OVERRIDE_CFG_ETRR, MC_STREAMID_OVERRIDE_CFG_ETRW, MC_STREAMID_OVERRIDE_CFG_TSECSRDB, MC_STREAMID_OVERRIDE_CFG_TSECSWRB, MC_STREAMID_OVERRIDE_CFG_GPUSRD2, MC_STREAMID_OVERRIDE_CFG_GPUSWR2, MC_STREAMID_OVERRIDE_CFG_AXISR, MC_STREAMID_OVERRIDE_CFG_AXISW, MC_STREAMID_OVERRIDE_CFG_EQOSR, MC_STREAMID_OVERRIDE_CFG_EQOSW, MC_STREAMID_OVERRIDE_CFG_UFSHCR, MC_STREAMID_OVERRIDE_CFG_UFSHCW, MC_STREAMID_OVERRIDE_CFG_NVDISPLAYR, MC_STREAMID_OVERRIDE_CFG_BPMPR, MC_STREAMID_OVERRIDE_CFG_BPMPW, MC_STREAMID_OVERRIDE_CFG_BPMPDMAR, MC_STREAMID_OVERRIDE_CFG_BPMPDMAW, MC_STREAMID_OVERRIDE_CFG_AONR, MC_STREAMID_OVERRIDE_CFG_AONW, MC_STREAMID_OVERRIDE_CFG_AONDMAR, MC_STREAMID_OVERRIDE_CFG_AONDMAW, MC_STREAMID_OVERRIDE_CFG_SCER, MC_STREAMID_OVERRIDE_CFG_SCEW, MC_STREAMID_OVERRIDE_CFG_SCEDMAR, MC_STREAMID_OVERRIDE_CFG_SCEDMAW, MC_STREAMID_OVERRIDE_CFG_APEDMAR, MC_STREAMID_OVERRIDE_CFG_APEDMAW, MC_STREAMID_OVERRIDE_CFG_NVDISPLAYR1, MC_STREAMID_OVERRIDE_CFG_VICSRD1, MC_STREAMID_OVERRIDE_CFG_NVDECSRD1 }; /* array to hold the security configs for stream IDs */ const static mc_streamid_security_cfg_t sec_cfgs[] = { mc_make_sec_cfg(SCEW, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(AFIR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(NVDISPLAYR1, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(XUSB_DEVR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(VICSRD1, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(NVENCSWR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(TSECSRDB, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(AXISW, SECURE, NO_OVERRIDE, DISABLE), mc_make_sec_cfg(SDMMCWAB, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(AONDMAW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(GPUSWR2, SECURE, NO_OVERRIDE, DISABLE), mc_make_sec_cfg(SATAW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(UFSHCW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(AFIW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(SDMMCR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(SCEDMAW, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(UFSHCR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(SDMMCWAA, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(APEDMAW, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(SESWR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(MPCORER, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(PTCR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(BPMPW, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(ETRW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(GPUSRD, SECURE, NO_OVERRIDE, DISABLE), mc_make_sec_cfg(VICSWR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(SCEDMAR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(HDAW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(ISPWA, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(EQOSW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(XUSB_HOSTW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(TSECSWR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(SDMMCRAA, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(APER, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(VIW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(APEW, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(AXISR, SECURE, NO_OVERRIDE, DISABLE), mc_make_sec_cfg(SDMMCW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(BPMPDMAW, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(ISPRA, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(NVDECSWR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(XUSB_DEVW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(NVDECSRD, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(MPCOREW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(NVDISPLAYR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(BPMPDMAR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(NVJPGSWR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(NVDECSRD1, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(TSECSRD, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(NVJPGSRD, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(SDMMCWA, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(SCER, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(XUSB_HOSTR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(VICSRD, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(AONDMAR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(AONW, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(SDMMCRA, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(HOST1XDMAR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(EQOSR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(SATAR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(BPMPR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(HDAR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(SDMMCRAB, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(ETRR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(AONR, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(APEDMAR, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(SESRD, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(NVENCSRD, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(GPUSWR, SECURE, NO_OVERRIDE, DISABLE), mc_make_sec_cfg(TSECSWRB, NON_SECURE, NO_OVERRIDE, ENABLE), mc_make_sec_cfg(ISPWB, NON_SECURE, OVERRIDE, ENABLE), mc_make_sec_cfg(GPUSRD2, SECURE, NO_OVERRIDE, DISABLE), }; const static mc_txn_override_cfg_t mc_override_cfgs[] = { mc_make_txn_override_cfg(BPMPW, CGID_TAG_ADR), mc_make_txn_override_cfg(EQOSW, CGID_TAG_ADR), mc_make_txn_override_cfg(NVJPGSWR, CGID_TAG_ADR), mc_make_txn_override_cfg(SDMMCWAA, CGID_TAG_ADR), mc_make_txn_override_cfg(MPCOREW, CGID_TAG_ADR), mc_make_txn_override_cfg(SCEDMAW, CGID_TAG_ADR), mc_make_txn_override_cfg(SDMMCW, CGID_TAG_ADR), mc_make_txn_override_cfg(AXISW, CGID_TAG_ADR), mc_make_txn_override_cfg(TSECSWR, CGID_TAG_ADR), mc_make_txn_override_cfg(GPUSWR, CGID_TAG_ADR), mc_make_txn_override_cfg(XUSB_HOSTW, CGID_TAG_ADR), mc_make_txn_override_cfg(TSECSWRB, CGID_TAG_ADR), mc_make_txn_override_cfg(GPUSWR2, CGID_TAG_ADR), mc_make_txn_override_cfg(AONDMAW, CGID_TAG_ADR), mc_make_txn_override_cfg(AONW, CGID_TAG_ADR), mc_make_txn_override_cfg(SESWR, CGID_TAG_ADR), mc_make_txn_override_cfg(BPMPDMAW, CGID_TAG_ADR), mc_make_txn_override_cfg(SDMMCWA, CGID_TAG_ADR), mc_make_txn_override_cfg(HDAW, CGID_TAG_ADR), mc_make_txn_override_cfg(NVDECSWR, CGID_TAG_ADR), mc_make_txn_override_cfg(UFSHCW, CGID_TAG_ADR), mc_make_txn_override_cfg(SATAW, CGID_TAG_ADR), mc_make_txn_override_cfg(ETRW, CGID_TAG_ADR), mc_make_txn_override_cfg(VICSWR, CGID_TAG_ADR), mc_make_txn_override_cfg(NVENCSWR, CGID_TAG_ADR), mc_make_txn_override_cfg(SDMMCWAB, CGID_TAG_ADR), mc_make_txn_override_cfg(ISPWB, CGID_TAG_ADR), mc_make_txn_override_cfg(APEW, CGID_TAG_ADR), mc_make_txn_override_cfg(XUSB_DEVW, CGID_TAG_ADR), mc_make_txn_override_cfg(AFIW, CGID_TAG_ADR), mc_make_txn_override_cfg(SCEW, CGID_TAG_ADR), }; /* * Init SMMU. */ void tegra_memctrl_setup(void) { uint32_t val; uint32_t num_overrides = sizeof(streamid_overrides) / sizeof(uint32_t); uint32_t num_sec_cfgs = sizeof(sec_cfgs) / sizeof(mc_streamid_security_cfg_t); uint32_t num_txn_overrides = sizeof(mc_override_cfgs) / sizeof(mc_txn_override_cfg_t); uint32_t tegra_rev; int i; INFO("Tegra Memory Controller (v2)\n"); /* Program the SMMU pagesize */ val = tegra_smmu_read_32(ARM_SMMU_GSR0_SECURE_ACR); val |= ARM_SMMU_GSR0_PGSIZE_64K; tegra_smmu_write_32(ARM_SMMU_GSR0_SECURE_ACR, val); /* Program all the Stream ID overrides */ for (i = 0; i < num_overrides; i++) tegra_mc_streamid_write_32(streamid_overrides[i], MC_STREAM_ID_MAX); /* Program the security config settings for all Stream IDs */ for (i = 0; i < num_sec_cfgs; i++) { val = sec_cfgs[i].override_enable << 16 | sec_cfgs[i].override_client_inputs << 8 | sec_cfgs[i].override_client_ns_flag << 0; tegra_mc_streamid_write_32(sec_cfgs[i].offset, val); } /* * All requests at boot time, and certain requests during * normal run time, are physically addressed and must bypass * the SMMU. The client hub logic implements a hardware bypass * path around the Translation Buffer Units (TBU). During * boot-time, the SMMU_BYPASS_CTRL register (which defaults to * TBU_BYPASS mode) will be used to steer all requests around * the uninitialized TBUs. During normal operation, this register * is locked into TBU_BYPASS_SID config, which routes requests * with special StreamID 0x7f on the bypass path and all others * through the selected TBU. This is done to disable SMMU Bypass * mode, as it could be used to circumvent SMMU security checks. */ tegra_mc_write_32(MC_SMMU_BYPASS_CONFIG, MC_SMMU_BYPASS_CONFIG_SETTINGS); /* * Set the MC_TXN_OVERRIDE registers for write clients. */ tegra_rev = (mmio_read_32(TEGRA_MISC_BASE + HARDWARE_REVISION_OFFSET) & HARDWARE_MINOR_REVISION_MASK) >> HARDWARE_MINOR_REVISION_SHIFT; if (tegra_rev == HARDWARE_REVISION_A01) { /* GPU and NVENC settings for rev. A01 */ val = tegra_mc_read_32(MC_TXN_OVERRIDE_CONFIG_GPUSWR); val &= ~MC_TXN_OVERRIDE_CGID_TAG_MASK; tegra_mc_write_32(MC_TXN_OVERRIDE_CONFIG_GPUSWR, val | MC_TXN_OVERRIDE_CGID_TAG_ZERO); val = tegra_mc_read_32(MC_TXN_OVERRIDE_CONFIG_GPUSWR2); val &= ~MC_TXN_OVERRIDE_CGID_TAG_MASK; tegra_mc_write_32(MC_TXN_OVERRIDE_CONFIG_GPUSWR2, val | MC_TXN_OVERRIDE_CGID_TAG_ZERO); val = tegra_mc_read_32(MC_TXN_OVERRIDE_CONFIG_NVENCSWR); val &= ~MC_TXN_OVERRIDE_CGID_TAG_MASK; tegra_mc_write_32(MC_TXN_OVERRIDE_CONFIG_NVENCSWR, val | MC_TXN_OVERRIDE_CGID_TAG_CLIENT_AXI_ID); } else { /* settings for rev. A02 */ for (i = 0; i < num_txn_overrides; i++) { val = tegra_mc_read_32(mc_override_cfgs[i].offset); val &= ~MC_TXN_OVERRIDE_CGID_TAG_MASK; tegra_mc_write_32(mc_override_cfgs[i].offset, val | mc_override_cfgs[i].cgid_tag); } } /* video memory carveout region */ if (video_mem_base) { tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_LO, (uint32_t)video_mem_base); tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_HI, (uint32_t)(video_mem_base >> 32)); tegra_mc_write_32(MC_VIDEO_PROTECT_SIZE_MB, video_mem_size); /* * MCE propogates the VideoMem configuration values across the * CCPLEX. */ mce_update_gsc_videomem(); } } /* * Secure the BL31 DRAM aperture. * * phys_base = physical base of TZDRAM aperture * size_in_bytes = size of aperture in bytes */ void tegra_memctrl_tzdram_setup(uint64_t phys_base, uint32_t size_in_bytes) { /* * Setup the Memory controller to allow only secure accesses to * the TZDRAM carveout */ INFO("Configuring TrustZone DRAM Memory Carveout\n"); tegra_mc_write_32(MC_SECURITY_CFG0_0, (uint32_t)phys_base); tegra_mc_write_32(MC_SECURITY_CFG3_0, (uint32_t)(phys_base >> 32)); tegra_mc_write_32(MC_SECURITY_CFG1_0, size_in_bytes >> 20); /* * MCE propogates the security configuration values across the * CCPLEX. */ mce_update_gsc_tzdram(); } /* * Secure the BL31 TZRAM aperture. * * phys_base = physical base of TZRAM aperture * size_in_bytes = size of aperture in bytes */ void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes) { uint64_t tzram_end = phys_base + size_in_bytes - 1; uint32_t val; /* * Check if the TZRAM is locked already. */ if (tegra_mc_read_32(MC_TZRAM_REG_CTRL) == DISABLE_TZRAM_ACCESS) return; /* * Setup the Memory controller to allow only secure accesses to * the TZRAM carveout */ INFO("Configuring TrustZone RAM (SysRAM) Memory Carveout\n"); /* Program the base and end values */ tegra_mc_write_32(MC_TZRAM_BASE, (uint32_t)phys_base); tegra_mc_write_32(MC_TZRAM_END, (uint32_t)tzram_end); /* Extract the high address bits from the base/end values */ val = (uint32_t)(phys_base >> 32) & TZRAM_ADDR_HI_BITS_MASK; val |= (((uint32_t)(tzram_end >> 32) << TZRAM_END_HI_BITS_SHIFT) & TZRAM_ADDR_HI_BITS_MASK); tegra_mc_write_32(MC_TZRAM_HI_ADDR_BITS, val); /* Disable further writes to the TZRAM setup registers */ tegra_mc_write_32(MC_TZRAM_REG_CTRL, DISABLE_TZRAM_ACCESS); /* * MCE propogates the security configuration values across the * CCPLEX. */ mce_update_gsc_tzram(); } /* * Program the Video Memory carveout region * * phys_base = physical base of aperture * size_in_bytes = size of aperture in bytes */ void tegra_memctrl_videomem_setup(uint64_t phys_base, uint32_t size_in_bytes) { uint32_t regval; /* * The GPU is the user of the Video Memory region. In order to * transition to the new memory region smoothly, we program the * new base/size ONLY if the GPU is in reset mode. */ regval = mmio_read_32(TEGRA_CAR_RESET_BASE + TEGRA_GPU_RESET_REG_OFFSET); if ((regval & GPU_RESET_BIT) == 0) { ERROR("GPU not in reset! Video Memory setup failed\n"); return; } /* * Setup the Memory controller to restrict CPU accesses to the Video * Memory region */ INFO("Configuring Video Memory Carveout\n"); tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_LO, (uint32_t)phys_base); tegra_mc_write_32(MC_VIDEO_PROTECT_BASE_HI, (uint32_t)(phys_base >> 32)); tegra_mc_write_32(MC_VIDEO_PROTECT_SIZE_MB, size_in_bytes); /* store new values */ video_mem_base = phys_base; video_mem_size = size_in_bytes >> 20; /* * MCE propogates the VideoMem configuration values across the * CCPLEX. */ mce_update_gsc_videomem(); }