[PATCH 3/8] armv8: K3: j7200: Add custom MMU support

[Suman Anna]

The A72 U-Boot code can load and boot a number of the available
R5FSS Cores on the J7200 SoC. Change the memory attributes for the
DDR regions used by the remote processors so that the cores can see
and execute the proper code.

The J7200 SoC has less number of remote processors compared to J721E,
so use less memory for the remote processors. So, a separate table
based on the current J721E table is added for J7200 SoCs, and selected
using the appropriate Kconfig CONFIG_TARGET_J7200_A72_EVM symbol.

Signed-off-by: Suman Anna <s-anna at ti.com>
---
 arch/arm/mach-k3/arm64-mmu.c | 59 +++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-k3/arm64-mmu.c b/arch/arm/mach-k3/arm64-mmu.c
index 95f830b7ffe4..a0da3df59388 100644
--- a/arch/arm/mach-k3/arm64-mmu.c
+++ b/arch/arm/mach-k3/arm64-mmu.c
@@ -2,8 +2,9 @@
 /*
  * K3: ARM64 MMU setup
  *
- * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ * Copyright (C) 2018-2020 Texas Instruments Incorporated - https://www.ti.com/
  *	Lokesh Vutla <lokeshvutla at ti.com>
+ *	Suman Anna <s-anna at ti.com>
  * (This file is derived from arch/arm/mach-zynqmp/cpu.c)
  *
  */
@@ -66,6 +67,8 @@ struct mm_region *mem_map = am654_mem_map;
 #endif /* CONFIG_SOC_K3_AM6 */
 
 #ifdef CONFIG_SOC_K3_J721E
+
+#ifdef CONFIG_TARGET_J721E_A72_EVM
 /* NR_DRAM_BANKS + 32bit IO + 64bit IO + terminator */
 #define NR_MMU_REGIONS	(CONFIG_NR_DRAM_BANKS + 6)
 
@@ -122,4 +125,58 @@ struct mm_region j721e_mem_map[NR_MMU_REGIONS] = {
 };
 
 struct mm_region *mem_map = j721e_mem_map;
+#endif /* CONFIG_TARGET_J721E_A72_EVM */
+
+#ifdef CONFIG_TARGET_J7200_A72_EVM
+#define NR_MMU_REGIONS	(CONFIG_NR_DRAM_BANKS + 5)
+
+/* ToDo: Add 64bit IO */
+struct mm_region j7200_mem_map[NR_MMU_REGIONS] = {
+	{
+		.virt = 0x0UL,
+		.phys = 0x0UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		.virt = 0x80000000UL,
+		.phys = 0x80000000UL,
+		.size = 0x20000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0xa0000000UL,
+		.phys = 0xa0000000UL,
+		.size = 0x04800000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL_NC) |
+			 PTE_BLOCK_NON_SHARE
+	}, {
+		.virt = 0xa4800000UL,
+		.phys = 0xa4800000UL,
+		.size = 0x5b800000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0x880000000UL,
+		.phys = 0x880000000UL,
+		.size = 0x80000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
+			 PTE_BLOCK_INNER_SHARE
+	}, {
+		.virt = 0x500000000UL,
+		.phys = 0x500000000UL,
+		.size = 0x400000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		/* List terminator */
+		0,
+	}
+};
+
+struct mm_region *mem_map = j7200_mem_map;
+#endif /* CONFIG_TARGET_J7200_A72_EVM */
+
 #endif /* CONFIG_SOC_K3_J721E */
-- 
2.28.0