mediatek: mt8183: add EMI MPU driver for DRAM protection

Add EMI MPU driver for DRAM protection.
Signed-off-by: kenny liang <kenny.liang@mediatek.com>
Change-Id: I0355e084184b5396ad8ac99fff6ef9d050fb5e96

plat/mediatek/mt8183/bl31_plat_setup.c

@@ -9,6 +9,7 @@
 #include <common/bl_common.h>
 #include <common/desc_image_load.h>
 #include <devapc.h>
+#include <emi_mpu.h>
 #include <plat/common/common_def.h>
 #include <drivers/console.h>
 #include <common/debug.h>
@@ -138,6 +139,8 @@ void bl31_platform_setup(void)
 {
 	devapc_init();
 
+	emi_mpu_init();
+
 	platform_setup_cpu();
 	generic_delay_timer_init();
 

plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.c

+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common/debug.h>
+#include <lib/mmio.h>
+#include <emi_mpu.h>
+
+int is_4GB(void)
+{
+	return 0; /* 8183 doesn't use 4GB */
+}
+
+/*
+ * emi_mpu_set_region_protection: protect a region.
+ * @start: start address of the region
+ * @end: end address of the region
+ * @region: EMI MPU region id
+ * @access_permission: EMI MPU access permission
+ * Return 0 for success, otherwise negative status code.
+ */
+int emi_mpu_set_region_protection(
+	unsigned long start, unsigned long end,
+	int region,
+	unsigned int access_permission)
+{
+	int ret = 0;
+
+	if (end <= start) {
+		ERROR("[EMI][MTEE][MPU] Invalid address!.\n");
+		return -1;
+	}
+
+	if (is_4GB()) {
+		/* 4GB mode: emi_addr = phy_addr & 0xffff */
+		start = EMI_PHY_OFFSET & 0xffff;
+		end = EMI_PHY_OFFSET & 0xffff;
+	} else {
+		/* non-4GB mode: emi_addr = phy_addr - MEM_OFFSET */
+		start = start - EMI_PHY_OFFSET;
+		end = end - EMI_PHY_OFFSET;
+	}
+
+	/*Address 64KB alignment*/
+	start = start >> 16;
+	end = end >> 16;
+
+	switch (region) {
+	case 0:
+		mmio_write_32(EMI_MPU_APC0, 0);
+		mmio_write_32(EMI_MPU_SA0, start);
+		mmio_write_32(EMI_MPU_EA0, end);
+		mmio_write_32(EMI_MPU_APC0, access_permission);
+		break;
+
+	case 1:
+		mmio_write_32(EMI_MPU_APC1, 0);
+		mmio_write_32(EMI_MPU_SA1, start);
+		mmio_write_32(EMI_MPU_EA1, end);
+		mmio_write_32(EMI_MPU_APC1, access_permission);
+		break;
+
+	case 2:
+		mmio_write_32(EMI_MPU_APC2, 0);
+		mmio_write_32(EMI_MPU_SA2, start);
+		mmio_write_32(EMI_MPU_EA2, end);
+		mmio_write_32(EMI_MPU_APC2, access_permission);
+		break;
+
+	case 3:
+		mmio_write_32(EMI_MPU_APC3, 0);
+		mmio_write_32(EMI_MPU_SA3, start);
+		mmio_write_32(EMI_MPU_EA3, end);
+		mmio_write_32(EMI_MPU_APC3, access_permission);
+		break;
+
+	case 4:
+		mmio_write_32(EMI_MPU_APC4, 0);
+		mmio_write_32(EMI_MPU_SA4, start);
+		mmio_write_32(EMI_MPU_EA4, end);
+		mmio_write_32(EMI_MPU_APC4, access_permission);
+		break;
+
+	case 5:
+		mmio_write_32(EMI_MPU_APC5, 0);
+		mmio_write_32(EMI_MPU_SA5, start);
+		mmio_write_32(EMI_MPU_EA5, end);
+		mmio_write_32(EMI_MPU_APC5, access_permission);
+		break;
+
+	case 6:
+		mmio_write_32(EMI_MPU_APC6, 0);
+		mmio_write_32(EMI_MPU_SA6, start);
+		mmio_write_32(EMI_MPU_EA6, end);
+		mmio_write_32(EMI_MPU_APC6, access_permission);
+		break;
+
+	case 7:
+		mmio_write_32(EMI_MPU_APC7, 0);
+		mmio_write_32(EMI_MPU_SA7, start);
+		mmio_write_32(EMI_MPU_EA7, end);
+		mmio_write_32(EMI_MPU_APC7, access_permission);
+		break;
+
+	default:
+		ret = -1;
+		break;
+	}
+
+	return ret;
+}
+
+void dump_emi_mpu_regions(void)
+{
+	unsigned int apc, sa, ea;
+	unsigned int apc_addr = EMI_MPU_APC0;
+	unsigned int sa_addr = EMI_MPU_SA0;
+	unsigned int ea_addr = EMI_MPU_EA0;
+	int i;
+
+	for (i = 0; i < 8; ++i) {
+		apc = mmio_read_32(apc_addr + i * 4);
+		sa = mmio_read_32(sa_addr + i * 4);
+		ea = mmio_read_32(ea_addr + i * 4);
+		WARN("region %d:\n", i);
+		WARN("\tapc:0x%x, sa:0x%x, ea:0x%x\n", apc, sa, ea);
+	}
+}
+
+void emi_mpu_init(void)
+{
+	/* Set permission */
+	emi_mpu_set_region_protection(0x40000000UL, 0x4FFFFFFFUL, 0,
+				(FORBIDDEN << 3 | FORBIDDEN << 6));
+	emi_mpu_set_region_protection(0x50000000UL, 0x528FFFFFUL, 1,
+				(FORBIDDEN << 6));
+	emi_mpu_set_region_protection(0x52900000UL, 0x5FFFFFFFUL, 2,
+				(FORBIDDEN << 3 | FORBIDDEN << 6));
+	emi_mpu_set_region_protection(0x60000000UL, 0x7FFFFFFFUL, 3,
+				(FORBIDDEN << 3 | FORBIDDEN << 6));
+	emi_mpu_set_region_protection(0x80000000UL, 0x9FFFFFFFUL, 4,
+				(FORBIDDEN << 3 | FORBIDDEN << 6));
+	emi_mpu_set_region_protection(0xA0000000UL, 0xBFFFFFFFUL, 5,
+				(FORBIDDEN << 3 | FORBIDDEN << 6));
+	emi_mpu_set_region_protection(0xC0000000UL, 0xDFFFFFFFUL, 6,
+				(FORBIDDEN << 3 | FORBIDDEN << 6));
+	emi_mpu_set_region_protection(0xE0000000UL, 0xFFFFFFFFUL, 7,
+				(FORBIDDEN << 3 | FORBIDDEN << 6));
+	dump_emi_mpu_regions();
+}
+

plat/mediatek/mt8183/drivers/emi_mpu/emi_mpu.h

+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __EMI_MPU_H
+#define __EMI_MPU_H
+
+#include <platform_def.h>
+
+#define EMI_MPUP		(EMI_BASE + 0x01D8)
+#define EMI_MPUQ		(EMI_BASE + 0x01E0)
+#define EMI_MPUR		(EMI_BASE + 0x01E8)
+#define EMI_MPUS		(EMI_BASE + 0x01F0)
+#define EMI_MPUT		(EMI_BASE + 0x01F8)
+#define EMI_MPUY		(EMI_BASE + 0x0220)
+#define EMI_MPU_CTRL	(EMI_MPU_BASE + 0x0000)
+#define EMI_MPUD0_ST	(EMI_BASE + 0x0160)
+#define EMI_MPUD1_ST	(EMI_BASE + 0x0164)
+#define EMI_MPUD2_ST	(EMI_BASE + 0x0168)
+#define EMI_MPUD3_ST	(EMI_BASE + 0x016C)
+#define EMI_MPUD0_ST2	(EMI_BASE + 0x0200)
+#define EMI_MPUD1_ST2	(EMI_BASE + 0x0204)
+#define EMI_MPUD2_ST2	(EMI_BASE + 0x0208)
+#define EMI_MPUD3_ST2	(EMI_BASE + 0x020C)
+
+#define EMI_PHY_OFFSET	(0x40000000UL)
+#define EIGHT_DOMAIN
+
+#define NO_PROTECTION	(0)
+#define SEC_RW			(1)
+#define SEC_RW_NSEC_R	(2)
+#define SEC_RW_NSEC_W	(3)
+#define SEC_R_NSEC_R	(4)
+#define FORBIDDEN		(5)
+#define SEC_R_NSEC_RW	(6)
+
+#define SECURE_OS_MPU_REGION_ID	(0)
+#define ATF_MPU_REGION_ID		(1)
+
+#ifdef EIGHT_DOMAIN
+#define SET_ACCESS_PERMISSON(d7, d6, d5, d4, d3, d2, d1, d0) \
+	(((d7) << 21) | ((d6) << 18) | ((d5) << 15) | ((d4) << 12) \
+	| ((d3) << 9) | ((d2) << 6) | ((d1) << 3) | (d0))
+#else
+#define SET_ACCESS_PERMISSON(d3, d2, d1, d0) \
+	(((d3) << 9) | ((d2) << 6) | ((d1) << 3) | (d0))
+#endif
+
+//#define EMI_MPU_BASE                (0x1020E000U)
+
+#define EMI_MPU_SA0                 (EMI_MPU_BASE + 0x100)
+#define EMI_MPU_SA1                 (EMI_MPU_BASE + 0x104)
+#define EMI_MPU_SA2                 (EMI_MPU_BASE + 0x108)
+#define EMI_MPU_SA3                 (EMI_MPU_BASE + 0x10C)
+#define EMI_MPU_SA4                 (EMI_MPU_BASE + 0x110)
+#define EMI_MPU_SA5                 (EMI_MPU_BASE + 0x114)
+#define EMI_MPU_SA6                 (EMI_MPU_BASE + 0x118)
+#define EMI_MPU_SA7                 (EMI_MPU_BASE + 0x11C)
+
+#define EMI_MPU_EA0                 (EMI_MPU_BASE + 0x200)
+#define EMI_MPU_EA1                 (EMI_MPU_BASE + 0x204)
+#define EMI_MPU_EA2                 (EMI_MPU_BASE + 0x208)
+#define EMI_MPU_EA3                 (EMI_MPU_BASE + 0x20C)
+#define EMI_MPU_EA4                 (EMI_MPU_BASE + 0x210)
+#define EMI_MPU_EA5                 (EMI_MPU_BASE + 0x214)
+#define EMI_MPU_EA6                 (EMI_MPU_BASE + 0x218)
+#define EMI_MPU_EA7                 (EMI_MPU_BASE + 0x21C)
+
+#define EMI_MPU_APC0                (EMI_MPU_BASE + 0x300)
+#define EMI_MPU_APC1                (EMI_MPU_BASE + 0x304)
+#define EMI_MPU_APC2                (EMI_MPU_BASE + 0x308)
+#define EMI_MPU_APC3                (EMI_MPU_BASE + 0x30C)
+#define EMI_MPU_APC4                (EMI_MPU_BASE + 0x310)
+#define EMI_MPU_APC5                (EMI_MPU_BASE + 0x314)
+#define EMI_MPU_APC6                (EMI_MPU_BASE + 0x318)
+#define EMI_MPU_APC7                (EMI_MPU_BASE + 0x31C)
+
+#define EMI_MPU_CTRL_D0             (EMI_MPU_BASE + 0x800)
+#define EMI_MPU_CTRL_D1             (EMI_MPU_BASE + 0x804)
+#define EMI_MPU_CTRL_D2             (EMI_MPU_BASE + 0x808)
+#define EMI_MPU_CTRL_D3             (EMI_MPU_BASE + 0x80C)
+#define EMI_MPU_CTRL_D4             (EMI_MPU_BASE + 0x810)
+#define EMI_MPU_CTRL_D5             (EMI_MPU_BASE + 0x814)
+#define EMI_MPU_CTRL_D6             (EMI_MPU_BASE + 0x818)
+#define EMI_MPU_CTRL_D7             (EMI_MPU_BASE + 0x81C)
+
+#define EMI_MPU_MASK_D0             (EMI_MPU_BASE + 0x900)
+#define EMI_MPU_MASK_D1             (EMI_MPU_BASE + 0x904)
+#define EMI_MPU_MASK_D2             (EMI_MPU_BASE + 0x908)
+#define EMI_MPU_MASK_D3             (EMI_MPU_BASE + 0x90C)
+#define EMI_MPU_MASK_D4             (EMI_MPU_BASE + 0x910)
+#define EMI_MPU_MASK_D5             (EMI_MPU_BASE + 0x914)
+#define EMI_MPU_MASK_D6             (EMI_MPU_BASE + 0x918)
+#define EMI_MPU_MASK_D7             (EMI_MPU_BASE + 0x91C)
+
+int emi_mpu_set_region_protection(
+	unsigned long start, unsigned long end,
+	int region,
+	unsigned int access_permission);
+
+void dump_emi_mpu_regions(void);
+void emi_mpu_init(void);
+
+#endif  /* __EMI_MPU_H */

plat/mediatek/mt8183/include/platform_def.h

@@ -25,6 +25,7 @@
 #define MCUCFG_BASE        0x0c530000
 #define CFG_SF_CTRL        0x0c510014
 #define CFG_SF_INI         0x0c510010
+#define EMI_BASE           (IO_PHYS + 0x219000)
 #define EMI_MPU_BASE       (IO_PHYS + 0x226000)
 #define TRNG_base          (IO_PHYS + 0x20f000)
 #define MT_GIC_BASE        0x0c000000

plat/mediatek/mt8183/platform.mk

@@ -9,6 +9,7 @@ MTK_PLAT_SOC  := ${MTK_PLAT}/${PLAT}
 
 PLAT_INCLUDES := -I${MTK_PLAT}/common/                            \
                  -I${MTK_PLAT_SOC}/drivers/                       \
+                 -I${MTK_PLAT_SOC}/drivers/emi_mpu/               \
                  -I${MTK_PLAT_SOC}/drivers/devapc/                \
                  -I${MTK_PLAT_SOC}/drivers/mcdi/                  \
                  -I${MTK_PLAT_SOC}/drivers/spmc/                  \
@@ -58,6 +59,7 @@ BL31_SOURCES    += common/desc_image_load.c                              \
                    ${MTK_PLAT_SOC}/drivers/spm/spm_suspend.c             \
                    ${MTK_PLAT_SOC}/drivers/gpio/mtgpio.c                 \
                    ${MTK_PLAT_SOC}/drivers/uart/uart.c                   \
+                   ${MTK_PLAT_SOC}/drivers/emi_mpu/emi_mpu.c             \
                    ${MTK_PLAT_SOC}/plat_pm.c                             \
                    ${MTK_PLAT_SOC}/plat_topology.c                       \
                    ${MTK_PLAT_SOC}/plat_mt_gic.c                         \