GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+/*
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <string.h>
+
+#include <platform_def.h>
+
+#include <common/bl_common.h>
+#include <common/debug.h>
+
+#include <smmu.h>
+#include <tegra_platform.h>
+#include <tegra_private.h>
+
+extern void memcpy16(void *dest, const void *src, unsigned int length);
+
+#define SMMU_NUM_CONTEXTS		64U
+#define SMMU_CONTEXT_BANK_MAX_IDX	64U
+
+#define MISMATCH_DETECTED		0x55AA55AAU
+
+/*
+ * Init SMMU during boot or "System Suspend" exit
+ */
+void tegra_smmu_init(void)
+{
+	uint32_t val, cb_idx, smmu_id, ctx_base;
+	uint32_t num_smmu_devices = plat_get_num_smmu_devices();
+
+	for (smmu_id = 0U; smmu_id < num_smmu_devices; smmu_id++) {
+		/* Program the SMMU pagesize and reset CACHE_LOCK bit */
+		val = tegra_smmu_read_32(smmu_id, SMMU_GSR0_SECURE_ACR);
+		val |= SMMU_GSR0_PGSIZE_64K;
+		val &= (uint32_t)~SMMU_ACR_CACHE_LOCK_ENABLE_BIT;
+		tegra_smmu_write_32(smmu_id, SMMU_GSR0_SECURE_ACR, val);
+
+		/* reset CACHE LOCK bit for NS Aux. Config. Register */
+		val = tegra_smmu_read_32(smmu_id, SMMU_GNSR_ACR);
+		val &= (uint32_t)~SMMU_ACR_CACHE_LOCK_ENABLE_BIT;
+		tegra_smmu_write_32(smmu_id, SMMU_GNSR_ACR, val);
+
+		/* disable TCU prefetch for all contexts */
+		ctx_base = (SMMU_GSR0_PGSIZE_64K * SMMU_NUM_CONTEXTS)
+				+ SMMU_CBn_ACTLR;
+		for (cb_idx = 0U; cb_idx < SMMU_CONTEXT_BANK_MAX_IDX; cb_idx++) {
+			val = tegra_smmu_read_32(smmu_id,
+				ctx_base + (SMMU_GSR0_PGSIZE_64K * cb_idx));
+			val &= (uint32_t)~SMMU_CBn_ACTLR_CPRE_BIT;
+			tegra_smmu_write_32(smmu_id, ctx_base +
+				(SMMU_GSR0_PGSIZE_64K * cb_idx), val);
+		}
+
+		/* set CACHE LOCK bit for NS Aux. Config. Register */
+		val = tegra_smmu_read_32(smmu_id, SMMU_GNSR_ACR);
+		val |= (uint32_t)SMMU_ACR_CACHE_LOCK_ENABLE_BIT;
+		tegra_smmu_write_32(smmu_id, SMMU_GNSR_ACR, val);
+
+		/* set CACHE LOCK bit for S Aux. Config. Register */
+		val = tegra_smmu_read_32(smmu_id, SMMU_GSR0_SECURE_ACR);
+		val |= (uint32_t)SMMU_ACR_CACHE_LOCK_ENABLE_BIT;
+		tegra_smmu_write_32(smmu_id, SMMU_GSR0_SECURE_ACR, val);
+	}
+}
+
+/*
+ * Verify SMMU settings have not been altered during boot
+ */
+void tegra_smmu_verify(void)
+{
+	uint32_t cb_idx, ctx_base, smmu_id, val;
+	uint32_t num_smmu_devices = plat_get_num_smmu_devices();
+	uint32_t mismatch = 0U;
+
+	for (smmu_id = 0U; smmu_id < num_smmu_devices; smmu_id++) {
+		/* check PGSIZE_64K bit inr S Aux. Config. Register */
+		val = tegra_smmu_read_32(smmu_id, SMMU_GSR0_SECURE_ACR);
+		if (0U == (val & SMMU_GSR0_PGSIZE_64K)) {
+			ERROR("%s: PGSIZE_64K Mismatch - smmu_id=%d, GSR0_SECURE_ACR=%x\n",
+				__func__, smmu_id, val);
+			mismatch = MISMATCH_DETECTED;
+		}
+
+		/* check CACHE LOCK bit in S Aux. Config. Register */
+		if (0U == (val & SMMU_ACR_CACHE_LOCK_ENABLE_BIT)) {
+			ERROR("%s: CACHE_LOCK Mismatch - smmu_id=%d, GSR0_SECURE_ACR=%x\n",
+				__func__, smmu_id, val);
+			mismatch = MISMATCH_DETECTED;
+		}
+
+		/* check CACHE LOCK bit in NS Aux. Config. Register */
+		val = tegra_smmu_read_32(smmu_id, SMMU_GNSR_ACR);
+		if (0U == (val & SMMU_ACR_CACHE_LOCK_ENABLE_BIT)) {
+			ERROR("%s: Mismatch - smmu_id=%d, GNSR_ACR=%x\n",
+				__func__, smmu_id, val);
+			mismatch = MISMATCH_DETECTED;
+		}
+
+		/* verify TCU prefetch for all contexts is disabled */
+		ctx_base = (SMMU_GSR0_PGSIZE_64K * SMMU_NUM_CONTEXTS) +
+			SMMU_CBn_ACTLR;
+		for (cb_idx = 0U; cb_idx < SMMU_CONTEXT_BANK_MAX_IDX; cb_idx++) {
+			val = tegra_smmu_read_32(smmu_id,
+				ctx_base + (SMMU_GSR0_PGSIZE_64K * cb_idx));
+			if (0U != (val & SMMU_CBn_ACTLR_CPRE_BIT)) {
+				ERROR("%s: Mismatch - smmu_id=%d, cb_idx=%d, GSR0_PGSIZE_64K=%x\n",
+					__func__, smmu_id, cb_idx, val);
+				mismatch = MISMATCH_DETECTED;
+			}
+		}
+	}
+
+	/* Treat configuration mismatch as fatal */
+	if ((mismatch == MISMATCH_DETECTED) && tegra_platform_is_silicon()) {
+		panic();
+	}
+}