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https://github.com/AsahiLinux/m1n1
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f3d0a58f42
I saw at least one SError crash on Linux after doing this, but can't repro; unclear if related to the MMU changes or not... Signed-off-by: Hector Martin <marcan@marcan.st>
67 lines
1.5 KiB
Python
67 lines
1.5 KiB
Python
#!/usr/bin/python
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from setup import *
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payload = open(sys.argv[1], "rb").read()
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dtb = open(sys.argv[2], "rb").read()
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if len(sys.argv) > 3:
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initramfs = open(sys.argv[3], "rb").read()
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initramfs_size = len(initramfs)
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else:
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initramfs = None
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initramfs_size = 0
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kernel_base = 0x820000000
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initramfs_base = 0x830000000
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compressed_size = len(payload)
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compressed_addr = u.malloc(compressed_size)
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dtb_addr = u.malloc(len(dtb))
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print("Loading %d bytes to 0x%x..." % (compressed_size, compressed_addr))
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iface.writemem(compressed_addr, payload, True)
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print("Loading DTB to 0x%x..." % dtb_addr)
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iface.writemem(dtb_addr, dtb)
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if initramfs is not None:
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print("Loading %d initramfs bytes to 0x%x..." % (initramfs_size, initramfs_base))
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iface.writemem(initramfs_base, initramfs, True)
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#kernel_size = p.xzdec(compressed_addr, compressed_size)
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kernel_size = 32 * 1024 * 1024
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#if kernel_size < 0:
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#raise Exception("Decompression header check error!",)
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#print("Uncompressed kernel size: %d bytes" % kernel_size)
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print("Uncompressing...")
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iface.dev.timeout = 40
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kernel_size = p.gzdec(compressed_addr, compressed_size, kernel_base, kernel_size)
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print(kernel_size)
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if kernel_size < 0:
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raise Exception("Decompression error!")
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print("Decompress OK...")
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p.dc_cvau(kernel_base, kernel_size)
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p.ic_ivau(kernel_base, kernel_size)
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print("Ready to boot")
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daif = u.mrs(DAIF)
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daif |= 0x3c0
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u.msr(DAIF, daif)
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print("DAIF: %x" % daif)
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p.mmu_shutdown()
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p.vector(kernel_base, dtb_addr)
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iface.ttymode()
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