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Diffstat (limited to 'plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c')
-rw-r--r--plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c160
1 files changed, 145 insertions, 15 deletions
diff --git a/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c b/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c
index 41a4ede8..87c7ed03 100644
--- a/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c
+++ b/plat/nvidia/tegra/common/drivers/memctrl/memctrl_v2.c
@@ -40,7 +40,8 @@
#include <string.h>
#include <tegra_def.h>
#include <tegra_platform.h>
-#include <xlat_tables.h>
+#include <utils.h>
+#include <xlat_tables_v2.h>
#define TEGRA_GPU_RESET_REG_OFFSET 0x30
#define GPU_RESET_BIT (1 << 0)
@@ -450,7 +451,7 @@ void tegra_memctrl_restore_settings(void)
tegra_mc_write_32(MC_VIDEO_PROTECT_SIZE_MB, video_mem_size_mb);
/*
- * MCE propogates the VideoMem configuration values across the
+ * MCE propagates the VideoMem configuration values across the
* CCPLEX.
*/
mce_update_gsc_videomem();
@@ -490,7 +491,7 @@ void tegra_memctrl_tzdram_setup(uint64_t phys_base, uint32_t size_in_bytes)
tegra_mc_read_32(MC_SECURITY_CFG1_0));
/*
- * MCE propogates the security configuration values across the
+ * MCE propagates the security configuration values across the
* CCPLEX.
*/
mce_update_gsc_tzdram();
@@ -506,25 +507,28 @@ void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes)
{
uint32_t index;
uint32_t total_128kb_blocks = size_in_bytes >> 17;
- uint32_t residual_4kb_blocks = (size_in_bytes & 0x1FFFF) >> 12;
+ uint32_t residual_4kb_blocks = (size_in_bytes & (uint32_t)0x1FFFF) >> 12;
uint32_t val;
+ INFO("Configuring TrustZone SRAM Memory Carveout\n");
+
/*
* Reset the access configuration registers to restrict access
* to the TZRAM aperture
*/
- for (index = MC_TZRAM_CARVEOUT_CLIENT_ACCESS_CFG0;
- index <= MC_TZRAM_CARVEOUT_FORCE_INTERNAL_ACCESS5;
- index += 4)
+ for (index = MC_TZRAM_CLIENT_ACCESS_CFG0;
+ index < ((uint32_t)MC_TZRAM_CARVEOUT_CFG + (uint32_t)MC_GSC_CONFIG_REGS_SIZE);
+ index += 4U) {
tegra_mc_write_32(index, 0);
+ }
/*
* Set the TZRAM base. TZRAM base must be 4k aligned, at least.
*/
- assert(!(phys_base & 0xFFF));
+ assert((phys_base & (uint64_t)0xFFF) == 0U);
tegra_mc_write_32(MC_TZRAM_BASE_LO, (uint32_t)phys_base);
tegra_mc_write_32(MC_TZRAM_BASE_HI,
- (uint32_t)(phys_base >> 32) & TZRAM_BASE_HI_MASK);
+ (uint32_t)(phys_base >> 32) & MC_GSC_BASE_HI_MASK);
/*
* Set the TZRAM size
@@ -533,7 +537,7 @@ void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes)
* blocks)
*
*/
- val = (residual_4kb_blocks << TZRAM_SIZE_RANGE_4KB_SHIFT) |
+ val = (residual_4kb_blocks << MC_GSC_SIZE_RANGE_4KB_SHIFT) |
total_128kb_blocks;
tegra_mc_write_32(MC_TZRAM_SIZE, val);
@@ -543,17 +547,96 @@ void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes)
* at all.
*/
val = tegra_mc_read_32(MC_TZRAM_CARVEOUT_CFG);
- val &= ~TZRAM_ENABLE_TZ_LOCK_BIT;
- val |= TZRAM_LOCK_CFG_SETTINGS_BIT;
+ val &= ~MC_GSC_ENABLE_TZ_LOCK_BIT;
+ val |= MC_GSC_LOCK_CFG_SETTINGS_BIT;
tegra_mc_write_32(MC_TZRAM_CARVEOUT_CFG, val);
/*
- * MCE propogates the security configuration values across the
+ * MCE propagates the security configuration values across the
* CCPLEX.
*/
mce_update_gsc_tzram();
}
+static void tegra_lock_videomem_nonoverlap(uint64_t phys_base,
+ uint64_t size_in_bytes)
+{
+ uint32_t index;
+ uint64_t total_128kb_blocks = size_in_bytes >> 17;
+ uint64_t residual_4kb_blocks = (size_in_bytes & (uint32_t)0x1FFFF) >> 12;
+ uint64_t val;
+
+ /*
+ * Reset the access configuration registers to restrict access to
+ * old Videomem aperture
+ */
+ for (index = MC_VIDEO_PROTECT_CLEAR_ACCESS_CFG0;
+ index < ((uint32_t)MC_VIDEO_PROTECT_CLEAR_ACCESS_CFG0 + (uint32_t)MC_GSC_CONFIG_REGS_SIZE);
+ index += 4U) {
+ tegra_mc_write_32(index, 0);
+ }
+
+ /*
+ * Set the base. It must be 4k aligned, at least.
+ */
+ assert((phys_base & (uint64_t)0xFFF) == 0U);
+ tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_LO, (uint32_t)phys_base);
+ tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_HI,
+ (uint32_t)(phys_base >> 32) & (uint32_t)MC_GSC_BASE_HI_MASK);
+
+ /*
+ * Set the aperture size
+ *
+ * total size = (number of 128KB blocks) + (number of remaining 4KB
+ * blocks)
+ *
+ */
+ val = (uint32_t)((residual_4kb_blocks << MC_GSC_SIZE_RANGE_4KB_SHIFT) |
+ total_128kb_blocks);
+ tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_SIZE, (uint32_t)val);
+
+ /*
+ * Lock the configuration settings by enabling TZ-only lock and
+ * locking the configuration against any future changes from NS
+ * world.
+ */
+ tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_CFG,
+ (uint32_t)MC_GSC_ENABLE_TZ_LOCK_BIT);
+
+ /*
+ * MCE propagates the GSC configuration values across the
+ * CCPLEX.
+ */
+}
+
+static void tegra_unlock_videomem_nonoverlap(void)
+{
+ /* Clear the base */
+ tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_LO, 0);
+ tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_BASE_HI, 0);
+
+ /* Clear the size */
+ tegra_mc_write_32(MC_VIDEO_PROTECT_CLEAR_SIZE, 0);
+}
+
+static void tegra_clear_videomem(uintptr_t non_overlap_area_start,
+ unsigned long long non_overlap_area_size)
+{
+ /*
+ * Map the NS memory first, clean it and then unmap it.
+ */
+ mmap_add_dynamic_region(non_overlap_area_start, /* PA */
+ non_overlap_area_start, /* VA */
+ non_overlap_area_size, /* size */
+ MT_NS | MT_RW | MT_EXECUTE_NEVER); /* attrs */
+
+ zero_normalmem((void *)non_overlap_area_start, non_overlap_area_size);
+ flush_dcache_range(non_overlap_area_start, non_overlap_area_size);
+
+ mmap_remove_dynamic_region(non_overlap_area_start,
+ non_overlap_area_size);
+}
+
/*
* Program the Video Memory carveout region
*
@@ -562,7 +645,10 @@ void tegra_memctrl_tzram_setup(uint64_t phys_base, uint32_t size_in_bytes)
*/
void tegra_memctrl_videomem_setup(uint64_t phys_base, uint32_t size_in_bytes)
{
+ uintptr_t vmem_end_old = video_mem_base + (video_mem_size_mb << 20);
+ uintptr_t vmem_end_new = phys_base + size_in_bytes;
uint32_t regval;
+ unsigned long long non_overlap_area_size;
/*
* The GPU is the user of the Video Memory region. In order to
@@ -570,7 +656,7 @@ void tegra_memctrl_videomem_setup(uint64_t phys_base, uint32_t size_in_bytes)
* 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) {
+ if ((regval & GPU_RESET_BIT) == 0U) {
ERROR("GPU not in reset! Video Memory setup failed\n");
return;
}
@@ -581,17 +667,61 @@ void tegra_memctrl_videomem_setup(uint64_t phys_base, uint32_t size_in_bytes)
*/
INFO("Configuring Video Memory Carveout\n");
+ /*
+ * Configure Memory Controller directly for the first time.
+ */
+ if (video_mem_base == 0U)
+ goto done;
+
+ /*
+ * Lock the non overlapping memory being cleared so that other masters
+ * do not accidently write to it. The memory would be unlocked once
+ * the non overlapping region is cleared and the new memory
+ * settings take effect.
+ */
+ tegra_lock_videomem_nonoverlap(video_mem_base,
+ video_mem_size_mb << 20);
+
+ /*
+ * Clear the old regions now being exposed. The following cases
+ * can occur -
+ *
+ * 1. clear whole old region (no overlap with new region)
+ * 2. clear old sub-region below new base
+ * 3. clear old sub-region above new end
+ */
+ INFO("Cleaning previous Video Memory Carveout\n");
+
+ if (phys_base > vmem_end_old || video_mem_base > vmem_end_new) {
+ tegra_clear_videomem(video_mem_base,
+ (uint64_t)video_mem_size_mb << 20);
+ } else {
+ if (video_mem_base < phys_base) {
+ non_overlap_area_size = phys_base - video_mem_base;
+ tegra_clear_videomem(video_mem_base, non_overlap_area_size);
+ }
+ if (vmem_end_old > vmem_end_new) {
+ non_overlap_area_size = vmem_end_old - vmem_end_new;
+ tegra_clear_videomem(vmem_end_new, non_overlap_area_size);
+ }
+ }
+
+done:
+ /* program the Videomem aperture */
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 >> 20);
+ /* unlock the previous locked nonoverlapping aperture */
+ tegra_unlock_videomem_nonoverlap();
+
/* store new values */
video_mem_base = phys_base;
video_mem_size_mb = size_in_bytes >> 20;
/*
- * MCE propogates the VideoMem configuration values across the
+ * MCE propagates the VideoMem configuration values across the
* CCPLEX.
*/
mce_update_gsc_videomem();
generated by cgit (git 2.34.1) at 2024-07-12 04:57:36 +0000