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[08/17] armv8: mach-k3: am642: Add custom MMU support

Message ID 20210423162748.1952-9-d-gerlach@ti.com
State Accepted
Commit 7fe7713c2ec6c7018ef1a2d92f2439156a4b12bc
Delegated to: Lokesh Vutla
Headers show
Series arm: mach-k3: Initial Support for Texas Instruments AM642 Platform | expand

Commit Message

Dave Gerlach April 23, 2021, 4:27 p.m. UTC 
From: Keerthy <j-keerthy@ti.com>

Change the memory attributes for the DDR regions used by the remote
processors on AM65x so that the cores can see and execute the proper code.

A separate table based on the previous K3 SoCs is introduced since the
number of remote processors and their DDR usage is different between the
SoC families.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
---
 arch/arm/mach-k3/arm64-mmu.c | 41 ++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm/mach-k3/arm64-mmu.c b/arch/arm/mach-k3/arm64-mmu.c
index a0da3df59388..94242e1e5cc3 100644
--- a/arch/arm/mach-k3/arm64-mmu.c
+++ b/arch/arm/mach-k3/arm64-mmu.c
@@ -180,3 +180,44 @@  struct mm_region *mem_map = j7200_mem_map;
 #endif /* CONFIG_TARGET_J7200_A72_EVM */
 
 #endif /* CONFIG_SOC_K3_J721E */
+
+#ifdef CONFIG_SOC_K3_AM642
+/* NR_DRAM_BANKS + 32bit IO + 64bit IO + terminator */
+#define NR_MMU_REGIONS	(CONFIG_NR_DRAM_BANKS + 3)
+
+/* ToDo: Add 64bit IO */
+struct mm_region am64_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 = 0x80000000UL,
+		.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 = am64_mem_map;
+#endif /* CONFIG_SOC_K3_AM642 */