Trying to setup the mmu

hw/mcu/broadcom/bcm2711/mmu.h

@@ -0,0 +1,44 @@
+#pragma once
+
+
+// From: https://github.com/s-matyukevich/raspberry-pi-os/blob/master/docs/lesson06/rpi-os.md
+/*
+ * Memory region attributes:
+ *
+ *   n = AttrIndx[2:0]
+ *            n    MAIR
+ *   DEVICE_nGnRnE    000    00000000
+ *   NORMAL_NC        001    01000100
+ */
+#define MT_DEVICE_nGnRnE         0x0
+#define MT_NORMAL_NC            0x1
+#define MT_DEVICE_nGnRnE_FLAGS        0x00
+#define MT_NORMAL_NC_FLAGS          0x44
+#define MAIR_VALUE            (MT_DEVICE_nGnRnE_FLAGS << (8 * MT_DEVICE_nGnRnE)) | (MT_NORMAL_NC_FLAGS << (8 * MT_NORMAL_NC))
+
+
+#define TCR_T0SZ            (64 - 35) 
+#define TCR_PS              (0x01 << 16) // 36-bit physical address
+#define TCR_TG0_4K          (0 << 14)
+#define TCR_SH0_OUTER_SHAREABLE (0x2 << 12)
+#define TCR_VALUE           (TCR_T0SZ | TCR_PS | TCR_TG0_4K | TCR_SH0_OUTER_SHAREABLE)
+
+#define ENTRY_TYPE_TABLE_DESCRIPTOR 0x11
+#define ENTRY_TYPE_BLOCK_ENTRY 0x01
+#define ENTRY_TYPE_TABLE_ENTRY 0x11
+#define ENTRY_TYPE_INVALID 0x00
+
+#define MM_DESCRIPTOR_VALID (0x1)
+
+#define MM_DESCRIPTOR_BLOCK (0x0 << 1)
+#define MM_DESCRIPTOR_TABLE (0x1 << 1)
+
+// Block attributes
+#define MM_DESCRIPTOR_EXECUTE_NEVER (0x1ull << 54)
+#define MM_DESCRIPTOR_CONTIGUOUS    (0x1ull << 52)
+
+#define MM_DESCRIPTOR_MAIR_INDEX(index) (index << 2)
+
+#define MM_TTBR_CNP (0x1)
+
+void setup_mmu_flat_map(void);