Add ADT and m1n1 stage 2 log as MTD phram reserved memory nodes #399
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Signed-off-by: Janne Grunau <[email protected]>
Requires CONFIG_MTD_PHRAM in Linux. Signed-off-by: Janne Grunau <[email protected]>
This registers a log buffer IODEV similar to the frame buffer IODEV. It is using a console IODEV to allow writing to the buffer until m1n1 jumps to the next stage. This allows also to increase the buffer size without increasing m1n1's size. The current CONSOLE_BUFFER_SIZE of 8k is not large enough to hold the entire log of executing m1n1 under the hypervisor on the M1 Ultra Mac Studio. Signed-off-by: Janne Grunau <[email protected]>
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"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
jannau
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"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
jannau
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"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
jannau
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Sep 28, 2024
"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
WhatAmISupposedToPutHere
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Sep 28, 2024
"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
WhatAmISupposedToPutHere
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Sep 28, 2024
"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
WhatAmISupposedToPutHere
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Sep 28, 2024
"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
WhatAmISupposedToPutHere
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Sep 28, 2024
"nvram" will not be the sole MTD device on AsahiLinux devices with m1n1-1.4.16 (AsahiLinux/m1n1#399) and CONFIG_MTD_PHRAM. Use "/dev/mtd/by-name/nvram" instead of "/dev/mtd0". Signed-off-by: Janne Grunau <[email protected]>
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Requires for easy access
CONFIG_MTD_PHRAMbut I guess can be still accesses through /dev/mem on systems missing this.The additional IODEV for the log console is a little bit ugly since it can't be added before
IODEV_USB0to keep backwards compatibility with python m1n1 but it shouldn't be handled like the USB IODEVs.